Search

The world's oceans are largely free from intensive farming, but momentum to intensify and expand mariculture--the cultivation of aquatic organisms in the ocean--is growing. Despite optimism that mariculture will create economic and nutritional benefits for humans, it can also generate a host of risks, including environmental degradation, harms to wildlife integrity and welfare, captivity effects, and shifts in how humans view the nonhuman world. Collectively, we refer to these four types of risks as "dewilding." In this systematic review, we searched Scopus and Web of Science for recent literature documenting mariculture's dewilding impacts to organize and collate this evidence under one unified framework. We find that mariculture's dewilding impacts are consistently documented, though often in isolation, and that captivity and conceptual dewilding impacts are recognized as potential harms far less than impacts on the environment and wildlife. Future work examining mariculture's dewilding impacts will be paramount to guiding human decision-making and activity going forward. [ABSTRACT FROM AUTHOR]

Aquaculture, fueled partly by claims of supporting food security, is experiencing unprecedented growth. Framing aquaculture as a monolith, however, overlooks its extreme taxonomic diversity. This paper assesses the welfare risks associated with that diversity, establishing seven species-level risk factors from involved parental care to long lifespans. Investigating these welfare risks across all aquatic species reported to the Food and Agriculture Organization (FAO) revealed an uneven distribution of risk, with extreme species-level risks in chordates, crustaceans, and cephalopod mollusks. Compared to species with fewer risks, species with extreme welfare risks were found to cost more and contribute the least to global production. This work challenges the notion that prioritizing animal welfare is incompatible with addressing food security and creates the possibility of identifying certain plant and invertebrate species, like seaweeds and bivalves, that minimize welfare concerns while providing affordability and accessibility. Going forward, proactive welfare approaches are needed to inform consumer choice and shape just and sustainable aquaculture policy. [ABSTRACT FROM AUTHOR]

The article advocates for the U.S. Congress to pass the OCTOPUS Act to prevent the establishment of commercial octopus farms, emphasizing that these farms cannot meet welfare standards and are unsustainable. Topics discussed include the ethical concerns of octopus captivity, the environmental impact of farming carnivorous species, and the motivations behind the demand for exotic meats.

A study published in Science Advances analyzed 2,048 species of reef fishes and found that the most at-risk species receive the least attention from humans. The research highlights the limited knowledge and experience that humans have with marine life, and the urgent need for increased attention and conservation efforts. The study used data from various sources to measure research effort and public attention for each species, and found that wide-ranging species and those used in fisheries and aquaculture attracted more interest. However, species classified as threatened or vulnerable received significantly less attention. The study suggests interventions such as prioritizing species labeled as data deficient or not evaluated for conservation assessment and exploring the causal dynamics between scientific knowledge, public attention, and conservation outcomes. [Extracted from the article]

One of the challenges of animal cognition research is overcoming anthropocentric sensory biases—in particular, favoring visual information and cues despite the dominance of other sensory cues in many nonhuman research subjects. As such, it is particularly important for animal cognition researchers to explicitly mention steps taken to control for and attend to the sensory world of their study species. Dogs are well known for their reliance on olfaction, but the extent to which dog cognition and behavior research accounts for olfactory cues or incorporates olfactory controls is unknown. With this bibliographic study, we reviewed canine research published in the past 10 years (2008–2018) in 13 scientific journals and coded the 481 resulting papers for mentions of olfactory or odor cues or controls. Our findings indicate that despite widespread acceptance of the significance of olfaction to dogs, scientific methodology rarely takes olfactory information processing into account. Finally, we propose a simple rubric of recommended reporting of olfactory information in research contexts, with the aims to help attune researchers to the umwelt of their study subjects, and to enhance the methodological reproducibility of canine cognition research. [ABSTRACT FROM AUTHOR]

Many scientists studying animal welfare appear to hold a hedonistic concept of welfare -whereby welfare is ultimately reducible to an animal’s subjective experience. The substantial advances in assessing animal’s subjective experience have enabled us to take a step back to consider whether such indicators are all one needs to know if one is interested in the welfare of an individual. To investigate this claim, we randomly assigned participants (n = 502) to read one of four vignettes describing a hypothetical chimpanzee and asked them to make judgments about the animal’s welfare. Vignettes were designed to systematically manipulate the descriptive mental states the chimpanzee was described as experiencing: feels good (FG) vs. feels bad (FB); as well as non-subjective features of the animal’s life: natural living and physical healthy (NH) vs. unnatural life and physically unhealthy (UU); creating a fully-crossed 2 (subjective experience) X 2 (objective life value) experimental design. Multiple regression analysis showed welfare judgments depended on the objective features of the animal’s life more than they did on how the animal was feeling: a chimpanzee living a natural life with negative emotions was rated as having better welfare than a chimpanzee living an unnatural life with positive emotions. We also found that the supposedly more purely psychological concept of happiness was also influenced by normative judgments about the animal’s life. For chimpanzees with positive emotions, those living a more natural life were rated as happier than those living an unnatural life. Insofar as analyses of animal welfare are assumed to be reflective of folk intuitions, these findings raise questions about a strict hedonistic account of animal welfare. More generally, this research demonstrates the potential utility of using empirical methods to address conceptual problems in animal welfare and ethics. [ABSTRACT FROM AUTHOR]

Beyond a hedonic model of the good life-approach pleasure and avoid pain-evidence is accumulating across species that well-being depends on potentially painful goal pursuit processes, like effort, engagement, and discovery. We hypothesized that daily challenges may provide a unique opportunity to fulfill such processes and that challenges would be more relevant within the promotion (gain-focused) than prevention (nonloss-focused) motivational system. Accordingly, we predicted that: (1) individuals who tend to be successful versus unsuccessful in achieving promotion-type goals would be better at managing daily challenges; and (2) challenge dysregulation would undermine promotion-related well-being (depressive symptoms) more than prevention-related well-being (anxiety symptoms). Across three studies, we find evidence in support of these hypotheses. Notably, as we find consistent evidence that too many and too few challenges may be damaging to mental health, we conclude that effective challenge regulation-not minimization-is likely to be a necessary component of optimal well-being. [ABSTRACT FROM AUTHOR]

Fish are capable of excellent vision and can be profoundly influenced by the visual properties of their environment. Ambient colours have been found to affect growth, survival, aggression and reproduction, but the effect of background darkness (i.e., the darkness vs. lightness of the background) on preference and aggression has not been evaluated systematically. One-hundred Coho salmon (Oncorhynchus kisutch), a species that is increasing in popularity in aquaculture, were randomly assigned to 10 tanks. Using a Latin-square design, every tank was bisected to allow fish in each tank to choose between all the following colour choices (8 choices in total): black vs. white, light grey, dark grey, and a mixed dark grey/black pattern, as well as industry-standard blue vs. white, light grey, dark grey, and black. Fish showed a strong preference for black backgrounds over all other options (p < 0.01). Across tests, preference strength increased with background darkness (p < 0.0001). Moreover, having darker backgrounds in the environment resulted in less aggressive behaviour throughout the tank (p < 0.0001). These results provide the first evidence that darker tanks are preferred by and decrease aggression in salmonids, which points to the welfare benefits of housing farmed salmon in enclosures containing dark backgrounds. [ABSTRACT FROM AUTHOR]

Modelling complex social behavior in the laboratory is challenging and requires analyses of dyadic interactions occurring over time in a physically and socially complex environment. In the current study, we approached the analyses of complex social interactions in group-housed male CD1 mice living in a large vivarium. Intensive observations of social interactions during a 3-week period indicated that male mice form a highly linear and steep dominance hierarchy that is maintained by fighting and chasing behaviors. Individual animals were classified as dominant, sub-dominant or subordinate according to their David’s Scores and I& SI ranking. Using a novel dynamic temporal Glicko rating method, we ascertained that the dominance hierarchy was stable across time. Using social network analyses, we characterized the behavior of individuals within 66 unique relationships in the social group. We identified two individual network metrics, Kleinberg’s Hub Centrality and Bonacich’s Power Centrality, as accurate predictors of individual dominance and power. Comparing across behaviors, we establish that agonistic, grooming and sniffing social networks possess their own distinctive characteristics in terms of density, average path length, reciprocity out-degree centralization and out-closeness centralization. Though grooming ties between individuals were largely independent of other social networks, sniffing relationships were highly predictive of the directionality of agonistic relationships. Individual variation in dominance status was associated with brain gene expression, with more dominant individuals having higher levels of corticotropin releasing factor mRNA in the medial and central nuclei of the amygdala and the medial preoptic area of the hypothalamus, as well as higher levels of hippocampal glucocorticoid receptor and brain-derived neurotrophic factor mRNA. This study demonstrates the potential and significance of combining complex social housing and intensive behavioral characterization of group-living animals with the utilization of novel statistical methods to further our understanding of the neurobiological basis of social behavior at the individual, relationship and group levels. [ABSTRACT FROM AUTHOR]

Scarcity has been found to intensify value, positive or negative, rather than simply enhancing it. Some researchers have proposed that scarcity affects value by increasing how much attention is paid to a stimulus. We conceptualized sustained attention as stronger engagement and operationalized a situation of scarcity by telling participants who were choosing between two objects that the object that was chosen would then be replaced (Replenish) or not replaced (Scarce). To distinguish sustained attention-stronger engagement in a situation of scarcity from grabbing attention (salience from distinctiveness), the choice was between one option with a single instance (solitary-high salience) and a second option with several duplicates (abundant-low salience). We predicted that stronger engagement from a situation of scarcity would, first, intensify the value of the chosen item regardless of whether it was solitary or abundant, with positive items becoming more positive and negative items becoming more negative, and second, the stronger engagement from the situation of scarcity would transfer intensification to another separate object in the same setting. The results of Studies 1 and 2 supported both of these predictions. Study 3 tested a boundary condition for these scarcity-engagement effects in terms of how real participants experienced the choice items to be, where 'realness' is another source of engagement strength. As expected, the scarcity-engagement effect on intensifying value was replicated for participants who experienced the activity as real but was eliminated for those who did not. [ABSTRACT FROM AUTHOR]

In recent years, the presence of stable individual variation in animal behaviour has been corroborated by studies across a wide variety of taxa and research disciplines. Reconciliation, or postconflict affiliation between former opponents, is a behavioural domain in which individual differences have not been systematically studied. Using a long-term data set comprising over 2000 conflict and postconflict observations in two groups of outdoor-housed chimpanzees, Pan troglodytes, we provide evidence for stable individual variation in reconciliation and test several hypotheses on how this postconflict mechanism relates to social switching behaviour. Results of generalized multilevel models revealed that individual differences remained a substantial source of variation in reconciliation after controlling for a number of situational variables (e.g. the nature of the relationship between opponents) shown by previous research to influence its occurrence. We further demonstrated a positive association between an individual's conciliatory tendency and three separate indices of social switching behaviour, proposing that individual differences in reconciliation may reflect a more fundamental motivation to switch between different social states. In addition to a discussion of potential motivational underpinnings, we provide an impetus for future work to consider how reconciliation relates to the broader constructs and themes identified within animal personality research. To the extent that individual differences in other aspects of conflict and postconflict repertoires exhibit temporal and cross-situational consistency, they too should inform our understanding of animal personalities. Delineating how these and other dimensions of sociality are in part driven by stable individual variation not only has implications for how social interactions themselves unfold, but ultimately for the fitness of the individuals therein. [Copyright &y& Elsevier]

As animal personality research becomes more central to the study of animal behavior, there is increasing need for theoretical frameworks addressing its causes and consequences. We propose that regulatory focus theory (RFT) could serve as one such framework while also providing insights into how animal personality relates to welfare. RFT distinguishes between two types of approach motivation: promotion, the motivation to approach gains, and prevention, the motivation to approach or maintain safety. Decades of research have established the utility of RFT as a model of human behavior and recent evidence from zoo-housed primates and laboratory rats has suggested that it may be applicable to nonhuman animal behavior as well. Building on these initial studies, we collected data on 60 rats, Rattus norvegicus, navigating an automated maze that allowed individuals to maintain darkness (indicative of prevention/safety-approach motivation) and/or activate food rewards (indicative of promotion/gain-approach motivation). As predicted, both behaviors showed stable individual differences (Ps <0.01) and were inversely associated with physiological signs of chronic stress, possibly indicating poor welfare (Ps <0.05). Subsequently, half the rats were exposed to a manageable threat (noxious novel object) in the homecage. Re-testing in the maze revealed that threat exposure increased darkness time achieved (P<0.05), suggesting a mechanism by which prevention motivation may be enhanced. These results point toward the potential utility of RFT as a model for animal behavior and welfare. [ABSTRACT FROM AUTHOR]

We propose that a comparative approach to well-being could be the key to understanding ‘the good life.’ Inspired by current theories of human well-being and animal welfare, we designed a novel test of exploration behavior. Environmentally and socially enriched Long-Evans female rats (N = 60) were trained in four simultaneously presented arms of an eight-arm radial-maze. They learned to expect successes in two arms and failures in the other two. After training, 20 animals remained in enriched housing (enrichment-maintenance) while 40 animals were re-housed in standard, isolated conditions (enrichment-removal). Two weeks later, all animals were re-tested in the maze, initially with access to the four familiar arms only. In the final minute, they also had access to the unfamiliar ambiguous-arms. Though both groups showed significant interest in the ambiguous-arms (P<.0001), the enrichment-maintenance group showed a significantly greater exploratory tendency (P<.01) despite having equivalent levels of activity (P>.3). Thus, we show not only that rats will abandon known rewards and incur risk in order to explore, indicating that exploration is valuable in its own right, but also that individuals with (vs. without) enriched housing conditions are more likely to engage in such exploratory behavior. This novel test contributes to the body of knowledge examining the importance of exploration in humans and other animals; implications for animal welfare and human well-being are discussed. [ABSTRACT FROM AUTHOR]

We examine how self-regulatory motivations of locomotion (initiation) and assessment (evaluation) are related to retirement wealth in middle-aged and older Americans. We test a hypothesis that high locomotion and some assessment levels predict high wealth levels. We use two national data sets: the 2008 Health and Retirement Study (N = 6,464) and the 2005 Midlife in the United States (N = 4,963). We found that a combination of high locomotion and moderate assessment motivation can maximize wealth accumulation. By creating this combination of locomotion and assessment motivations, policy interventions can be more effective in motivating wealth accumulation for retirement, such as a required annual review of retirement savings plans and understandable disclosure of the plans' costs. [ABSTRACT FROM PUBLISHER]

Research focusing on motivation has consistently identified changes in motivational emphases as individuals age. However, whether these same patterns exist with respect to more domain-general conceptualizations of these motives has not yet been examined. Furthermore, researchers have not determined whether these differences in motivations across age groups are associated with differences in different measures of well-being. Using three cross-sectional samples, we examine the relative importance individuals place on different motivational domains across different age groups. In Studies 1a and 1b, we show that age is negatively associated with growth motive importance, but is unassociated with security, control, or epistemic motive importance. In Study 2, we show that older adults who do not show this de-emphasis of growth motives have significantly lower life satisfaction and lower self-reported flourishing relative to those older adults who do demonstrate the typical reduced emphasis. Implications for these findings for happiness across age groups are discussed. [ABSTRACT FROM AUTHOR]

Regulatory focus (Higgins, 1997) builds on the classic approach-avoidance distinction by identifying two important approach orientations: the promotion focus (approaching gains and attainment) and the prevention focus (approaching nonlosses and safety). Though individual differences in regulatory focus have been widely studied in human psychology, it is unknown if such differences exist in other species. To explore this possibility, we designed a series of tests for laboratory rats, paralleling human regulatory focus research on risk taking. In home-cage tests, rats (N = 23) were given an opportunity to prevent a loss by burying a noxious novel object. In solitary tests in a novel enclosure, the same rats had the opportunity to pursue gains (food rewards) and/or safety (darkness). Rats demonstrated stable individual differences on both tests (p's < .001). Complementing the human research, duration of time spent with the noxious novel object was predicted by an individual's tendency to pursue safety (p < .01) and not by the tendency to pursue gains (p > .8). Some aspects of these results were compatible with alternative approaches, such as the bold-shy axis and "if-then" personality profiles (Mischel & Shoda, 1995). Regulatory focus theory, however, was uniquely able to predict the overall pattern, which may be an indication that it could contribute to future research in animal personality, motivation, and welfare. [ABSTRACT FROM AUTHOR]

Paternal environmental experiences are significant predictors of developmental outcomes in offspring and can occur even in the absence of paternal care. Although there has been a recent focus on the role of environmentally induced changes in the male germline in producing these effects, the potential mediating role of mothers has not been investigated. A role for mothers in the transmission of paternal effects has been well acknowledged in behavioral ecology, which predicts that females will dynamically adjust their reproductive investment in response to the qualities of their mate. In the present study, we show that a lifetime of socially enriched compared with impoverished housing conditions shifts anxiety-like behavior and gene expression of male mice. Females that mate with enriched-reared males exhibit increased levels of pup nursing and licking toward their offspring, which are associated with changes in gene expression within the maternal hypothalamus. Significantly, these changes in maternal behavior are correlated with the general levels of anxiety exhibited by their male mates. Further, we show that paternal environmental enrichment results in increased growth of their offspring. These results suggest that maternal-paternal interactions at mating may guide offspring development, with significant implications for the transgenerational transmission of paternal environmental experiences. [ABSTRACT FROM AUTHOR]

Morality is a concept that is based on value judgments of “right” or “wrong” and “good” and “bad”. Three language-competent apes (two bonobos and a chimpanzee) are shown to use the symbols “good” and “bad” in appropriate contexts and to co-construct these values with the humans in their environment, indicating that the specific expression of value judgments is cultural. Their developmental use of these symbols parallels studies in children which suggest that conceptual simplicity and internal development may affect the development of moral precursors. These findings support recent research that has found moral precursors in several species of nonhuman primates. [Copyright &y& Elsevier]

Simple Summary: To assess the possibility of forming stable and trusting relationships between humans and fishes, we documented the interactions between a familiar human experimenter and seven koi (Cyprinus rubrofuscus). Analyses of video data shows that overall, koi spent more time than expected in close proximity to the human and even sought out physical contact. Moreover, individual fish displayed unique interaction patterns, with some frequently engaging in tactile interaction and others only periodically or rarely doing so. By demonstrating that koi will voluntarily interact with humans and that individual differences play an important role in interaction style, this study provides the first evidence that individuated human–fish relationships may be possible, which has powerful implications for how we think about, treat, protect, and provide care for fish. The study of human–animal interactions has provided insights into the welfare of many species. To date, however, research has largely focused on human relationships with captive mammals, with relatively little exploration of interactions between humans and other vertebrates, despite non-mammals constituting the vast majority of animals currently living under human management. With this study, we aimed to address this gap in knowledge by investigating human–fish interactions at a community garden/aquaponics learning-center that is home to approximately 150 goldfish (Carassius auratus) and seven adult and two juvenile koi (Cyprinus rubrofuscus). After a habituation period (July–September 2019) during which time the fish were regularly provided with the opportunity to engage with the researcher's submerged hand, but were not forced to interact with the researcher, we collected video data on 10 non-consecutive study days during the month of October. This procedure produced 18~20-min interaction sessions, 10 during T1 (when the experimenter first arrived and the fish had not been fed) and eight during T2 (20–30 min after the fish had been fed to satiation; two sessions of which were lost due equipment malfunction). Interactions between the researcher and the seven adult koi were coded from video based on location (within reach, on the periphery, or out of reach from the researcher) and instances of physical, tactile interaction. Analyses revealed that overall, koi spent more time than expected within reach of the researcher during both T1 (p < 0.02) and T2 (p < 0.03). There were also substantial differences between individuals' overall propensity for being within-reach and engaging in physical interaction. These results show that koi will voluntarily interact with humans and that individual koi display unique and consistent patterns of interaction. By providing quantitative data to support anecdotal claims that such relationships exist around the world, this research contributes to the ongoing discoveries highlighting the profound dissonance between how humans think about and treat fish and who fish actually are, thereby emphasizing the necessity of stronger moral and legal protections for fishes. [ABSTRACT FROM AUTHOR]

Simple Summary: Our knowledge of fish welfare is still scant relative to the enormous demands created by aquaculture expansion and focuses primarily on preventing poor health without considering provision of environments conducive to positive experiences. We are far from understanding what individuals of the different species classified under the umbrella term "fish" need to experience good lives. The aquaculture industry has been expanding swiftly, and fishes belonging to hundreds of very different species are now farmed by the billions. Informed by terrestrial animal welfare science, this article aims to set a framework for making progress in investigating how to provide farmed fish with good welfare. This article aims to use contemporary (terrestrial) animal welfare science as a lens to evaluate the state of knowledge concerning welfare in fish species, focusing on farmed fishes. We take advantage of the vast expertise—including previous pitfalls and accomplishments—in the investigation of welfare in terrestrial vertebrates, borrowing questions and methodologies from terrestrial animal welfare science in order to (1) better understand the challenges and opportunities in the study of welfare in fish species, and (2) propose strategies for filling knowledge gaps. [ABSTRACT FROM AUTHOR]

Simple Summary: Despite increasing interest in fish welfare, we still know very little about positive emotions in fish. This study had two aims: (1) to characterize a previously undescribed social behavior in zebrafish, "heightened-shoaling", and (2) to evaluate whether heightened-shoaling may be a good candidate for future research into positive emotional behavior in zebrafish. Observing six groups of zebrafish housed in 110 L tanks furnished with a sloping gravel substrate, rocks, and artificial plants (10 fish/tank), we found that heightened-shoaling is marked by tight group cohesion, high behavioral synchrony (all fish engaging in the same behaviors at the same time), and low agonism. Episodes of heightened-shoaling occurred in all six groups, but rarely at the same time (only once out of 31 episodes), suggesting that the onset of heightened-shoaling is driven by internal group dynamics rather than external influences. Heightened-shoaling also appeared to be self-reinforcing as it had sustained durations—typically lasting for over 7 min and sometimes lasting for nearly half-an-hour. Collectively, these results are similar to the patterns that typify positive emotional behavior in other animals, for example, social grooming and social play. As the first description of heightened-shoaling, this research extends our knowledge of the range of zebrafish social dynamics and suggests a promising area for future research on positive emotions in fish. Zebrafish, a highly-social species of freshwater fish, are widely studied across many fields of laboratory science including developmental biology, neuroscience, and genomics. Nevertheless, as standard housing for zebrafish typically consists of small and simplistic environments, less is known about their social behavioral repertoire in more naturalistic settings. In particular, spontaneously occurring, socio-positive affiliative behaviors (e.g., social coordination and cohesion) that may be indicative of positive emotional experiences have rarely been reported or studied deliberately in zebrafish. Housing adult zebrafish (10 fish/tank) in large semi-natural tanks (110 L; n = 6) with sloping gravel substrate, rocks, and artificial plants, we observed a previously undescribed behavior: Distinct periods of spontaneous, synchronized, compact aggregations, what we call "heightened-shoaling". This project aimed to quantify the characteristics of this distinctive behavior and compare parameters of heightened-shoaling to baseline periods (normal behavior) and pre-feed periods (feed-anticipatory behavior). First, across 4 days, we selected video-clips (100 s each) from within (i) instances of heightened-shoaling (n = 9), (ii) baseline periods (n = 18), and (iii) pre-feed periods (n = 18). For each of these video clips, we scan sampled every 10 s to determine fish orientations and location within the tank and agonistic behavior. Next, we used an all-occurrence sampling method to record the timing and duration of all episodes of heightened-shoaling behavior when tank-lights were on (8:00 h to 18:00 h) across 10 days. From the scan-sampling data, we found that compared to baseline periods, heightened-shoaling was characterized by increased shoal cohesion (p < 0.0001), increased adherence to the horizontal plane (p < 0.0001), decreased agonism (p < 0.0001), and no diving behavior (lower positions within the water column signal negative effect in zebrafish, p > 0.1). From the all-occurrence sampling data, we found 31 episodes of heightened-shoaling with instances observed in all six tanks and only a single case in which heightened-shoaling occurred in two tanks at the same time. The median episode duration was 7.6 min (Range 1.3–28.6). As the first systematic description of heightened-shoaling behavior, this research contributes to our knowledge of the range of zebrafish social dynamics living in naturalistic environments. Moreover, as a spontaneously occurring, protracted, affiliative behavior, heightened-shoaling appears to be a good candidate for future research into positive emotional behavior in zebrafish. [ABSTRACT FROM AUTHOR]

Wildlife tourism attractions (WTA) are popular in the United States, but they may be harmful to the individual animals involved and we question whether they provide benefits to environmental conservation. Most research on the welfare and environmental implications of WTAs focuses on charismatic mammals, with few studies investigating these issues for reptiles. Here we examine alligator wrestling, including its impact on animal welfare and environmental conservation. Using a sample of 94 relevant YouTube videos of alligator wrestling in Florida representing 16 different venues, we coded the environmental and behavioral characteristics evident in each video. We then performed a content analysis of wrestlers' narration in a subset of 51 videos to analyze the environmental awareness and educational components of alligator wrestling. Our results show systemic welfare harm: 11 venues housed adult alligators together with conspecifics, 96% of alligator wrestling performances facilitated direct contact in the form of physical restraint by one or more human wrestlers, and as many as 96% of the videos did not show a suitable water or waterside features for captive alligators. Furthermore, 12% of performances showed wrestlers flipping alligators onto their backs while 16% showed wrestlers tying alligators' jaws shut, both of which are known to be acute stressors. Finally, just under half of alligator wrestling commentary (49%) addressed environmental conservation topics, and much of this commentary included contradictory or misleading information that is not likely to benefit alligators in the wild. We argue that alligator wrestling serves no role in promoting positive relationships between humans, animals, and the environment, and instead furthers traditional notions of dominion that undermine welfare and conservation aims. [ABSTRACT FROM AUTHOR]

Cognitive stimulation has been shown to be rewarding and capable of eliciting positive emotions in several species. In contrast to the abundant learning and exploration opportunities available in nature, captive environments can be under-stimulating—with the potential to induce anhedonia and reduce welfare. Zebrafish are now a popular scientific model, in part because of their high cognitive function and sensitivity to environmental manipulations, yet little is known regarding their response to free-choice opportunities to explore. To begin to understand the effect that cognitive enrichment may have on zebrafish behaviour, we housed zebrafish within six tanks (10 fish/110 L tank) for nine months and then removed a divider to expose 10 cm of additional novel tank space. We measured free-choice exploratory behaviour (latency and number of inspections), as well as anxiety/fear (bottom-dwelling) and social behaviour (agonistic behaviour, group cohesion and coordination). We collected video data on each of four days: the day before (baseline), the day of, the day after, and two weeks after divider removal. Using multilevel models, we found that after the divider was removed, zebrafish moved into the novel space on average within 9.7 ± 7.6 s (mean ± SD), and the number of inspections increased on each day observed ( p  < 0.003). We found no evidence of bottom-dwelling ( p  > 0.73), indicating that the manipulation was not likely to have induced a negative emotional response. Furthermore, the opportunity to explore altered social behaviour: reducing agonistic behaviour ( p  = 0.02), and increasing shoal cohesion ( p  = 0.04) and coordination ( p  = 0.04) for up to a day relative to baseline. In light of the fact that their natural habitats would normally include such information-gain opportunities, these results indicate that free-choice exploration may be beneficial for zebrafish welfare. This study thus adds to the growing body of literature on the role cognitive stimulation plays in welfare and indicates that zebrafish are good candidates for further cognitive enrichment research. [ABSTRACT FROM AUTHOR]

Zebrafish are now one of the most used animal model species in scientific research worldwide. Our current knowledge of wild zebrafish is limited to an estimated range of their natural habitats and their tendencies to form groups. In laboratories, zebrafish are typically housed in situations that differ greatly from their wild conditions. The disconnect between the characteristic features of animals’ natural environments and how they are housed in captivity has captured attention given the growing concern for the quality of life of animals under our care. As such, we propose that understanding zebrafish welfare must include in-depth knowledge of their natural behaviour, including research of their behaviour in semi-natural captive conditions, and how it may be affected by modern ‘standard’ laboratory housing. Moreover, as a highly social species, research investigating the social behaviour of zebrafish in natural and semi-natural contexts is particularly relevant. Thus, the four aims of this review are to: (1) synthesize the current state of knowledge regarding zebrafish welfare, focusing on their natural history, social motivation and behaviour, (2) describe the typical lives of laboratory zebrafish and what is known of their lives in the wild, (3) identify aspects of the current standard laboratory conditions that may affect zebrafish welfare and, (4) provide suggestions for practical changes that can be made to improve the captive housing environment that will ultimately enhance welfare and also identify promising areas for future research. We also discuss what is known about the cognitive ability of zebrafish and the research that supports concern for their welfare as well as the problems with studying animals housed in barren environments that reduce behavioural complexity and cognitive ability. Scientific investigation into the welfare of zebrafish opens the door to many exciting areas of research, such as determining which environmental parameters are most effective at mitigating behavioural abnormalities, refining and extending the study of fish emotion and affect, and discovering how to enhance zebrafish welfare in the many laboratories within which they live. [ABSTRACT FROM AUTHOR]

Simple Summary: The present study documents animal welfare concerns associated with a popular form of wildlife tourism: lion cub "petting". With data collected from 49 publicly available videos uploaded by tourists in South Africa, we find that lion cubs in these facilities regularly exhibit stress behaviors, including stereotypies, during tourist interactions. Video analysis shows that cubs in these facilities are subjected to several forms of poor husbandry practices such as being forced to interact outside normal waking hours. These results also suggest that regardless of tourism type—pure entertainment (tourism) or educational or pseudo-training opportunities in animal husbandry for volunteers (voluntourism)—"cub-petting" facilities involve acute negative welfare impacts in addition to the broader harms of normalizing the touching of young lions and perpetuating captive breeding. There is growing concern about captive lion hunting and breeding operations in South Africa, including cub-petting tourism. For the first time, we assess the quality of cub-petting facilities and code the stress behaviors of lion cubs when handled by tourists by analyzing four stress-related behaviors and six indicators of poor husbandry in 49 YouTube videos of tourist–lion cub interactions (from at least 11 South African safari parks, 2008-2019). We also categorized videos as regular tourism vs. voluntourism (tourism under the guise of helping those in need). We found a median of four poor husbandry practices per video, with all but two videos involving very young cubs (under 7 months) and the majority (61%) involving cubs estimated under 3 months old. Two videos claimed to show cubs as young as 9 days old and 1 day old, with their eyes still closed. The lion mother was apparent in only 1 of 49 videos. All but one of the interactions took place during the day, although young cubs are primarily active at night. The majority of videos (77%) showed cubs engaging in at least one stress behavior, and the most common stress behaviors were avoidance and aggression. Comparing voluntourism to regular tourism, we found no difference in instances of poor husbandry or observable stress behaviors (p's > 0.6). These results show that cub-petting operations are characterized by poor cub welfare, including features that are inherently harmful to cub development (e.g., separation from the mother at an early age and forced activity outside normal waking hours). Existing research suggests that many tourists are likely unaware of these negative impacts and may even believe that they are helping the cubs. This analysis provides evidence to the contrary. [ABSTRACT FROM AUTHOR]

Bisphenol A (BPA) is an estrogenic endocrine disruptor widely used in the production of plastics. Increasing evidence indicates that in utero BPA exposure affects sexual differentiation and behavior; however, the mechanisms underlying these effects are unknown. We hypothesized that BPA may disrupt epigenetic programming of gene expression in the brain. Here, we provide evidence that maternal exposure during pregnancy to environmentally relevant doses of BPA (2, 20, and 200 μg/kg/d) in mice induces sex-specific, dose-dependent (linear and curvilinear), and brain region-specific changes in expression of genes encoding estrogen receptors (ERs; ERα and ERβ) and estrogen-related receptor-γ in juvenile offspring. Concomitantly, BPA altered mRNA levels of epigenetic regulators DNA methyltransferase (DNMT) 1 and DNMT3A in the juvenile cortex and hypothalamus, paralleling changes in estrogen-related receptors. Importantly, changes in ERa and DNMT expression in the cortex (males) and hypothalamus (females) were associated with DNA methylation changes in the ERa gene. BPA exposure induced persistent, largely sex-specific effects on social and anxiety-like behavior, leading to disruption of sexually dimorphic behaviors. Although postnatal maternal care was altered in mothers treated with BPA during pregnancy, the effects of in utero BPA were not found to be mediated by maternal care. However, our data suggest that increased maternal care may partially attenuate the effects of in utero BPA on DNA methylation. Overall, we demonstrate that low-dose prenatal BPA exposure induces lasting epigenetic disruption in the brain that possibly underlie enduring effects of BPA on brain function and behavior, especially regarding sexually dimorphic phenotypes. [ABSTRACT FROM AUTHOR]

• Little is known about how small tropical fish experience common husbandry routines. • We measured the behavioral effects of manual tank cleaning on zebrafish. • Diving and agonistic behavior increased while cohesion and coordination decreased from baseline. • All behaviors returned to normal one hour after cleaning and remained low 24 h later. • Manual water changes likely increased stress, but the effects may be short-lived. Small, tropical fish are popular companion animals and constitute a major proportion of the vertebrates used in scientific research, but little is known about how they are affected by routine husbandry practices. Manual tank cleanings are a common and potentially stressful maintenance procedure that involves siphoning out a substantial volume of tank water, 'vacuuming' the substrate to remove waste, and pumping fresh water back into the tank. To examine how manual tank cleanings may affect stress and affiliative behavior in zebrafish (Danio rerio) , we video recorded the behavior of zebrafish (five 110 L tanks, 10 fish/tank) at two time-points: (i) immediately after tank cleaning and (ii) approximately one hour later. For comparison, we also recorded behavior during time-matched periods the day before cleaning (baseline) and the day after cleaning (longer-term effects). All fish had been exposed to this weekly procedure for over a year prior to data collection. Results show that immediately after tank cleaning, fish spent more time lower in the water column (an indicator of negative affect in zebrafish; p < 0.02), and were less cohesive (p < 0.0001), less coordinated (p < 0.0001) and tended to be more aggressive (p < 0.08) than they were during time-matched baseline periods. An hour after tank cleaning, all behaviors returned to baseline (p's > 0.2). On the day after cleaning, behaviors during both periods (immediately after and one-hour later) were indistinguishable from baseline (aggression: p > 0.05; all others: p's > 0.1). These results suggest that fish, like other animals, are adversely affected by some husbandry procedures, but that the effects may be short-lived. Future research could explore ways of mitigating tank cleaning stress by, for example, giving fish more predictability and control over their exposure to the husbandry event. [ABSTRACT FROM AUTHOR]

Simple Summary: The aim of this study was to determine how individual differences in behavior affect disease risk in Holstein dairy cows housed in two different social environments: (1) a predictable and non-competitive social environment and (2) an unpredictable and competitive social environment. Individual differences in feed intake and feeding behavior before calving were associated with cytological endometritis post-calving; however, the direction and magnitude of these effects were dependent on the social environment. These results provide the first evidence that individual differences in feeding behavior affect cytological endometritis risk differently depending on the social environment. Our aim was to determine whether individual differences in feeding and social behavior in different social environments affect health outcomes in dairy cows. We used eight groups of four animals per treatment assigned to either a 'predictable' or an 'unpredictable' and competitive social environment. Predictable cows were given free access to six feed bins with no change in feed delivery times; whereas, the unpredictable cows were required to share one feed bin with one resident cow and morning feed was delayed 0, 1, 2, or 3 h every other day. On alternate days, the unpredictable cows were also re-assigned to a new bin and a new resident partner. Low daily dry matter intake (DMI) was a risk factor for cytological endometritis in predictable cows (odds ratio (OR) (95% confidence interval): 0.17 (0.02, 0.53)), but low daily DMI was protective for unpredictable cows (OR: 1.93 (1.09, 4.14)). Although low rate of DMI (kg/min) was a risk factor for cytological endometritis for predictable cows (OR: 4.2 × 10−101 (8.6 × 10−206, 4.8 × 10−30)) it was unrelated to disease for unpredictable cows. There were no associations between feed bin visits or percentage of non-nutritive visits with the likelihood of cytological endometritis. This is the first evidence that individual differences in feeding behavior influence cytological endometritis risk in dairy cows, but the direction and magnitude of these effects is dependent on the social environment. [ABSTRACT FROM AUTHOR]

A number of studies have shown widespread public concern over housing animals in ways that restrict their ability to move freely. Dairy cows housed in tie stall barns are tethered continuously or for part of the day, but no study has assessed public support for this type of housing system. We report two experiments assessing public perceptions of tie stall housing for dairy cattle using a hypothetical referenda format. In Experiment 1, 65% of participants (n = 430) said they would support a ban on tie stalls. The probability of supporting a ban increased as the duration of time that cows were tethered increased. In Experiment 2, information about possible economic consequences was included. Relatively fewer (55%) participants (n = 372) indicated they would support a ban. Supporters of a ban were willing to pay an average dairy product price premium of 68% to see the ban enacted. Indirect measures of support indicated socially desirable responding was greater in Experiment 2 where the economic impacts of voting behavior were made explicit. In both studies, women and liberals were more likely to support a ban. The majority of participants in Experiment 1 (51%) and Experiment 2 (57%) said they had never heard or read anything about tie stalls before participating in our survey. We conclude that current knowledge of the use of tie stalls is low, but if this situation were to change there may be considerable public concern about the use of this housing method. [ABSTRACT FROM AUTHOR]

Zebrafish have become a popular biomedical model in recent decades, and are now maintained in laboratories worldwide. However, living within a captive environment can introduce novel environmental stressors and experiencing stress chronically can negatively affect animal welfare and, if applicable, how study results are interpreted. One method to potentially alleviate stress within captive environments is to introduce signaled predictability, i.e., conditioning captive populations to anticipate a future event by associating a visual or audio cue with the impending stimulus. A low-cost and easily accessible cue could be the caretakers themselves. Previous research has shown that archerfish can associate and distinguish between pictures of human faces, not human beings themselves. Therefore, it remains to be seen if fish, such as zebrafish can distinguish between two human caretakers, associated with different husbandry tasks. For this study, zebrafish were exposed to a caretaker who fed the fish only and a caretaker who chased the fish with a net, i.e., associated with an acute stressor. Caretaker duties were counterbalanced across two isolated laboratory shelving racks. Before performing tasks, the caretaker presented their face to all 10 fish tanks and then recorded the number of fish in the feeding area immediately. It was found that presentation of the stressor-caretaker did not significantly affect the number of fish within the feeding area, however, presentation of the caretaker associated with feeding led to a significant increase in the number of fish in the feeding area. By the end of the experiment, fish were more likely to be found in this area following the feeding-associated caretaker presentation, compared to the stressor-associated caretaker. These results suggest that zebrafish are capable of distinguishing between two human caretakers by learning to associate specific humans with husbandry procedures, particularly feeding. However, it is unclear exactly what visual cues, e.g., caretaker mannerisms, were utilized as caretaker faces were not isolated for presentation. Further research is needed to assess the repeatability of these results, as this research is novel, especially with respect to captive fish welfare. • Captivity can remove an animal's capacity for autonomy and, as a result, increase environmental stress exposure. • To minimize stress exposure, caretakers could incorporate predictable cues within their husbandry routines. • The facial presentation of a caretaker associated with a potentially stressful husbandry task did not significantly affect where the fish moved within their tanks. • The facial presentation of a caretaker associated with feeding did significantly affect fish behavior, e.g., the number of fish in the desired target area of the tank. • Zebrafish populations may be capable of human facial recognition and learn to associate specific humans with different husbandry procedures. [ABSTRACT FROM AUTHOR]

Many dairy cows in the developed world are now housed exclusively indoors with fewer than 5% of the 10 million lactating cows in the United States having access to pasture during the grazing season. Indoor housing systems are designed to meet biological needs for food, water, hygiene, and shelter, but surveys of public and farmer opinion suggest that people think that pasture access is also important for the well-being of dairy cows. To determine if pasture access is important to the cows themselves, we investigated to what extent cows will work to access pasture (by pushing on a weighted gate), and compared it to the motivation to access fresh feed. Cows worked at least as hard to access pasture as they did to access the fresh feed and worked hardest for outdoor access in the evening hours. Echoing public views on what allows for a good life for cattle, these results show that cows are highly motivated for outdoor access. [ABSTRACT FROM AUTHOR]

Depression and generalized anxiety, separately and as comorbid states, continue to represent a significant public health challenge. Current cognitive-behavioral treatments are clearly beneficial but there remains a need for continued development of complementary interventions. This manuscript presents two proof-of-concept studies, in analog samples, of “microinterventions” derived from regulatory focus and regulatory fit theories and targeting dysphoric and anxious symptoms. In Study 1, participants with varying levels of dysphoric and/or anxious mood were exposed to a brief intervention either to increase or to reduce engagement in personal goal pursuit, under the hypothesis that dysphoria indicates under-engagement of the promotion system whereas anxiety indicates over-engagement of the prevention system. In Study 2, participants with varying levels of dysphoric and/or anxious mood received brief training in counterfactual thinking, under the hypothesis that inducing individuals in a state of promotion failure to generate subtractive counterfactuals for past failures (a non-fit) will lessen their dejection/depression-related symptoms, whereas inducing individuals in a state of prevention failure to generate additive counterfactuals for past failures (a non-fit) will lessen their agitation/anxiety-related symptoms. In both studies, we observed discriminant patterns of reduction in distress consistent with the hypothesized links between dysfunctional states of the two motivational systems and dysphoric versus anxious symptoms. [ABSTRACT FROM AUTHOR]

Objective: To review the theory and research evidence suggesting that tailored interactive multimedia computer programs (IMCPs) aimed at optimizing patient health behaviors could lessen socio-demographic health disparities.Methods: Selective critical review of research regarding IMCPs tailored to psychological mediators of behavior and their effects on health behavior and outcomes among socio-demographically disadvantaged patients.Results: Tailored IMCPs can address patient factors (e.g. language barriers, low self-efficacy) and buffer provider (e.g. cognitive bias) and health system (e.g. office visit time constraints) factors that contribute to poor provider-patient communication and, thereby, suboptimal health behaviors. Research indicates disadvantaged individuals' interactions with providers are disproportionately affected by such factors, and that their behaviors respond favorably to tailored information, thus suggesting tailored IMCPs could mitigate disparities. However, no randomized controlled trials (RCTs) have examined this question. The optimal design and deployment of tailored IMCPs for disadvantaged patients also requires further study.Conclusion: Preliminary research suggests tailored IMCPs have the potential to reduce health disparities. RCTs designed expressly to examine this issue are warranted.Practice Implications: Many socio-demographic health disparities exist, and there is a dearth of proven disparity-reducing interventions. Thus, if tailored IMCPs were shown to lessen disparities, the public health implications would be considerable. [ABSTRACT FROM AUTHOR]