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368 results on '"Loneragan, Neil"'

9. Reprint of : Fishers who rely on mangroves: Modelling and mapping the global intensity of mangrove-associated fisheries

Author

zu Ermgassen, Philine S.E., Mukherjee, Nibedita, Worthington, Thomas A., Acosta, Alejandro, Rocha Araujo, Ana Rosa da, Beitl, Christine M., Castellanos-Galindo, Gustavo A., Cunha-Lignon, Marília, Dahdouh-Guebas, Farid, Diele, Karen, Parrett, Cara L., Dwyer, Patrick G., Gair, Jonathan R., Johnson, Andrew Frederick, Kuguru, Baraka, Savio Lobo, Aaron, Loneragan, Neil R., Longley-Wood, Kate, Mendonça, Jocemar Tomasino, Meynecke, Jan-Olaf, Mandal, Roland Nathan, Munga, Cosmas Nzaka, Reguero, Borja G., Rönnbäck, Patrik, Thorley, Julia, Wolff, Matthias, and Spalding, Mark

Published
2021
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11. Fishers who rely on mangroves: Modelling and mapping the global intensity of mangrove-associated fisheries

Author

zu Ermgassen, Philine S.E., Mukherjee, Nibedita, Worthington, Thomas A., Acosta, Alejandro, Rocha Araujo, Ana Rosa da, Beitl, Christine M., Castellanos-Galindo, Gustavo A., Cunha-Lignon, Marília, Dahdouh-Guebas, Farid, Diele, Karen, Parrett, Cara L., Dwyer, Patrick G., Gair, Jonathan R., Johnson, Andrew Frederick, Kuguru, Baraka, Savio Lobo, Aaron, Loneragan, Neil R., Longley-Wood, Kate, Mendonça, Jocemar Tomasino, Meynecke, Jan-Olaf, Mandal, Roland Nathan, Munga, Cosmas Nzaka, Reguero, Borja G., Rönnbäck, Patrik, Thorley, Julia, Wolff, Matthias, and Spalding, Mark

Published
2020
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32. Untangling the Complexity of Small-Scale Fisheries: Building an Understanding of Grouper-Snapper Fisheries Dynamics in Saleh Bay, West Nusa Tenggara, Indonesia.

Author

Herdiana, Yudi, Wiryawan, Budy, Wisudo, Sugeng Hari, Tweedley, James Richard, Yulianto, Irfan, Retnoningtyas, Heidi, and Loneragan, Neil Randell

Subjects
SMALL-scale fisheries, CORAL trout, FISHERIES
Abstract

Small-scale tropical fisheries are complex systems that utilize multiple fishing gears to target various species. In this study, we investigated small-scale reef and demersal fisheries in Saleh Bay, Indonesia, using catch and effort data from 2016 to 2019, where 57.7 percent of the catch was grouper (serranids) and snapper (lutjanids). Despite the complexity (75 documented species and eight fishing methods), this fishery is characterized by the catches of four dominant species: leopard coral grouper (Plectropomus leopardus), orange-spotted-grouper (Epinephelus coioides), spotted coral grouper (P. maculatus), and malabar blood snapper (Lutjanus malabaricus). The species caught varied among fishing methods. Over 90% of the catch was attributed to three primary fishing methods: bottom longline, speargun, and handline. Multivariate analyses found that fishing depth, season, and/or year significantly influenced the catch composition for each of these fishing methods. Fishing activities exhibit a temporal pattern influenced by monsoonal seasons. Results also suggest that fishers employ specialized fishing tactics by targeting high-value species to maximize their profits. This study recommends a management strategy of focusing on monitoring and managing the three main fishing gears and four important species during their peak seasons to reduce some of the complexity and management costs. [ABSTRACT FROM AUTHOR]

Published
2024
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37. Application of the Method Evaluation and Risk Assessment Tool for a Small-Scale Grouper Fishery in Indonesia.

Author

Herdiana, Yudi, Wiryawan, Budy, Wisudo, Sugeng H., Tweedley, James R., Yulianto, Irfan, Natsir, Mohamad, Agustina, Siska, Hordyk, Adrian, and Loneragan, Neil R.

Subjects
CORAL trout, RISK assessment, EVALUATION methodology, FISHERY management, SMALL-scale fisheries, FISHERY laws, GROUPERS
Abstract

Management strategy evaluation using the Method Evaluation and Risk Assessment (MERA) platform was used to evaluate management procedures (MPs) for improving the management of the leopard coral grouper (Plectropomus leopardus) fishery in Saleh Bay, Indonesia. This grouper is a valuable species currently under high fishing pressure. It is targeted by small-scale fisheries using a wide range of fishing methods; hence, management recommendations are needed to ensure sustainability. A suite of MPs for data-limited conditions were evaluated for their ability to achieve limit and target biomass reference points (B/BMSY = 0.5 and B/BMSY = 1, respectively), while maintaining a target yield of at least 0.5 MSY. The simulation results suggest that the currently implemented harvest control rules (HCRs) in Saleh Bay (size limit and spatial closure) may not be effective in achieving the management objective to attain the target biomass reference point due to relatively low compliance with the size limit regulation (320 mm total length) and the very small proportion of existing MPA no-take areas (~2.2%). This study recommends that the fisheries management authority explores the feasibility of implementing the total allowable catch (TAC) and seasonal closure in addition to the existing fishing regulations for P. leopardus in Saleh Bay. [ABSTRACT FROM AUTHOR]

Published
2023
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41. Differences in Recreational Fishers' Motivations for Utilising Two Estuarine Fisheries.

Author

Tweedley, James R., Obregón, Clara, Beukes, Sarah J., Loneragan, Neil R., and Hughes, Michael

Subjects
FISHERIES, BLUE crab, FISHERY management, SEBASTES marinus, OUTDOOR recreation, MOTIVATION (Psychology)
Abstract

Effective fisheries management requires an understanding of human dimensions. This study elicited the salient motivations for recreational blue swimmer crab and black bream fishing in Western Australia and whether these views differed depending on the fishing location and/or the characteristics of the fisher. Crab fishers were strongly consumption-orientated and aimed to "catch big crabs" and "catch enough crabs to eat". Furthermore, 91% consumed their catch, with only 2% practicing catch-and-release fishing. In contrast, 81% of black bream fishers did so for the sport/challenge, with the strongest motivation being to catch a bream considerably above legal size and with food only selected by 15% of respondents; most fishers released caught fish. The marked differences between the fisheries for the two species, which co-occur in the same estuaries, are likely driven by the accessible nature of the crab fishery, ease of catching crabs, the low cost of fishing equipment, and their taste. Fishing for black bream, however, requires more expensive equipment, patience, and a greater skill level. Fishers considered crabbing to be as important as other fishing and outdoor activities, whereas bream fishers considered bream fishing considerably more important, reflecting the trophy nature of this fishery. [ABSTRACT FROM AUTHOR]

Published
2023
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48. A stochastic model for estimating sustainable limits to wildlife mortality in a changing world

Author

Manlik, Oliver; https://orcid.org/0000-0002-0924-3768, Lacy, Robert C, Sherwin, William B, Finn, Hugh, Loneragan, Neil R, Allen, Simon J; https://orcid.org/0000-0002-2260-8143, Manlik, Oliver; https://orcid.org/0000-0002-0924-3768, Lacy, Robert C, Sherwin, William B, Finn, Hugh, Loneragan, Neil R, and Allen, Simon J; https://orcid.org/0000-0002-2260-8143

Abstract

Human-caused mortality of wildlife is a pervasive threat to biodiversity. Assessing the population-level impact of fisheries bycatch and other human-caused mortality of wildlife has typically relied upon deterministic methods. However, population declines are often accelerated by stochastic factors that are not accounted for in such conventional methods. Building on the widely applied potential biological removal (PBR) equation, we devised a new population modeling approach for estimating sustainable limits to human-caused mortality and applied it in a case study of bottlenose dolphins affected by capture in an Australian demersal otter trawl fishery. Our approach, termed sustainable anthropogenic mortality in stochastic environments (SAMSE), incorporates environmental and demographic stochasticity, including the dependency of offspring on their mothers. The SAMSE limit is the maximum number of individuals that can be removed without causing negative stochastic population growth. We calculated a PBR of 16.2 dolphins per year based on the best abundance estimate available. In contrast, the SAMSE model indicated that only 2.3–8.0 dolphins could be removed annually without causing a population decline in a stochastic environment. These results suggest that reported bycatch rates are unsustainable in the long term, unless reproductive rates are consistently higher than average. The difference between the deterministic PBR calculation and the SAMSE limits showed that deterministic approaches may underestimate the true impact of human-caused mortality of wildlife. This highlights the importance of integrating stochasticity when evaluating the impact of bycatch or other human-caused mortality on wildlife, such as hunting, lethal control measures, and wind turbine collisions. Although population viability analysis (PVA) has been used to evaluate the impact of human-caused mortality, SAMSE represents a novel PVA framework that incorporates stochasticity for estimating accept

Published
2022

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