31 results on '"Quinet Y"'
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2. Ant diversity decreases during the dry season:A meta-analysis of the effects of seasonality on ant richness and abundance
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Queiroz, A.C.M., Marques, T.G., Ribas, C.R., Cornelissen, T., Nogueira, A., Schmidt, F.A., Feitosa, R., Sobrinho, T.G., Quinet, Y., Baccaro, F.B., Ulysséa, M.A., Vargas, A.B., Morini, M.S.C., Souza, J.L.P., Paolucci, L., Dáttilo, W., Del-Claro, K., Lange, D., Santos, J., Silva, R.R., Campos, R.B.F., Albuquerque, E.Z., Izzo, T., Rabello, A.M., Solar, R.R.C., Soares, S.A., Carvalho, K.S., Moraes, A.B., Torezan-Silingardi, H.M., Nahas, L., dos Santos, I.A., Costa-Milanez, C.B., Esteves, F., Frizzo, T., Harada, A.Y., DaRocha, W., Diehl-Fleig, E., Queiroz, A.C.M., Marques, T.G., Ribas, C.R., Cornelissen, T., Nogueira, A., Schmidt, F.A., Feitosa, R., Sobrinho, T.G., Quinet, Y., Baccaro, F.B., Ulysséa, M.A., Vargas, A.B., Morini, M.S.C., Souza, J.L.P., Paolucci, L., Dáttilo, W., Del-Claro, K., Lange, D., Santos, J., Silva, R.R., Campos, R.B.F., Albuquerque, E.Z., Izzo, T., Rabello, A.M., Solar, R.R.C., Soares, S.A., Carvalho, K.S., Moraes, A.B., Torezan-Silingardi, H.M., Nahas, L., dos Santos, I.A., Costa-Milanez, C.B., Esteves, F., Frizzo, T., Harada, A.Y., DaRocha, W., and Diehl-Fleig, E.
- Abstract
Tropical studies traditionally describe insect diversity variation throughout the year. The temporally structured responses of insect assemblages to climate seasonality vary across ecosystems due to gradients of resource availability and limiting ecological factors. These idiosyncratic responses might be particularly true across the vast geographical range of the Brazilian territory, including various environments that harbor one of the most diverse ant faunas worldwide. This study addressed the relationship between ant diversity and climatic seasonality, performing a quantitative review of the published data on ant diversity collected in Brazil. We investigated the seasonality effect on ant abundance and richness described in the literature in 47 papers published between 2000 and 2018. These studies were developed mainly in the Atlantic Forest biome and collected ants with pitfall traps on the soil/litter stratum. We initially carried out a vote-counting procedure by comparing the number of significant results describing seasonal differences in the ant assemblage. We found that most papers described a similar pattern of ant abundance, richness, and species composition between seasons. However, when we performed a meta-analysis, we observed a clear pattern of higher ant abundance and richness in the wet/summer season compared with the dry/winter season. Our meta-analysis reveals that the ant diversity decreases in the dry season, strongly in the Cerrado biome. Additionally, we point out differences in the sampling effort across biomes, indicating the need for further investments in studies focused on temporal diversity patterns, including seasonal effects, on the insect assemblage in biomes less investigated so far. Abstract in Portuguese is available with online material.
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- 2023
3. Antimicrobial effect of Dinoponera quadriceps (Hymenoptera: Formicidae) venom against Staphylococcus aureus strains
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Lima, D. B., Torres, A. F.C., Mello, C. P., de Menezes, R. R.P.P.B., Sampaio, T. L., Canuto, J. A., da Silva, J. J.A., Freire, V. N., Quinet, Y. P., Havt, A., Monteiro, H. S.A., Nogueira, N. A.P., and Martins, A. M.C.
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- 2014
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4. Toxicity of the venom in three neotropical Crematogaster ants (Formicidae: Myrmicinae)
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Heredia, A., Biseau, J. C. de, and Quinet, Y.
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- 2005
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5. Behavioural Interactions Between Crematogaster brevispinosa rochai Forel (Hymenoptera: Formicidae) and Two Nasutitermes Species (Isoptera: Termitidae)
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Quinet, Y., Tekule, N., and de Biseau, J. C.
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- 2005
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6. Diversity of the ground-dwelling ant fauna (Hymenoptera: Formicidae) of a moist, montane forest of the semi-arid Brazilian 'Nordeste'
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Hites, N.L., Mourão, M.A.N., Araújo, F.O., Melo, M.V.C., de Biseau, J.C., and Quinet, Y.
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- 2005
7. Explosive food recruitment as a competitive strategy in the ant Myrmica sabuleti(Hymenoptera, Formicidae)
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de Biseau, J.-C., Quinet, Y., Deffernez, L., and Pasteels, J.M.
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- 1997
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8. Spatial specialization of the foragers and foraging strategy inLasius fuliginosus (Latreille) (Hymenoptera, Formicidae)
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Quinet, Y. and Pasteels, J. M.
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- 1996
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9. Food and reproductive strategies of the myrmecophilous staphylinid beetleHomoeusa acuminata (aleocharinae) on the foraging trails of its host antLasius fuliginosus (Hymenoptera: Formicidae)
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Quinet, Y. and Pasteels, J. M.
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- 1996
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10. Trail following and stowaway behaviour of the myrmecophilous staphylinid beetle,Homoeusa acuminata, during foraging trips of its hostLasius fuliginosus (Hymenoptera: Formicidae)
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Quinet, Y. and Pasteels, J. M.
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- 1995
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11. Crematogaster abstinens and Crematogaster pygmaea (Hymenoptera: Formicidae: Myrmicinae): from monogyny and monodomy to polygyny and polydomy
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Martins Segundo, G. B., Biseau, J. -C, Rodrigo Feitosa, Carlos, J. E. V., Sá, L. R., Fontenelle, M. T. M. B., and Quinet, Y.
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Polygyny and polydomy are key features in the nesting biology of many ants, raising important questions in social insect biology, in particular about the ecological determinants of such derived traits. One relevant way to investigate those questions is the comparative study of closely related species with contrasting colony structure. In our study, we investigated and compared morphological (morphology of queens, workers and males), chemical (cuticular hydrocarbon profiles), behavioral (attractiveness of queens and substrates chemically marked by queens, colony foundation, mating behavior), and colony-structure (nest architecture, queen number, nest number) traits in Crematogaster abstinens Forel, 1899 and C. pygmaea Forel, 1904, two related Neotropical species. Our aim was to provide evidence of close evolutionary relationship between the two species and to give new insight into the ecological significance of the polygynous and polydomous system found in C. pygmaea. We first showed that the two species share important traits supporting a close evolutionary relationship: same basic morphology in workers and queens, with high queen / worker dimorphism, and ground-dwelling habit with almost identical nest architecture. The two species also share a significant part of their cuticular hydrocarbon (CHC) profiles, which possibly explains the observed attractiveness of substrates marked by queens of one species to workers of the other species. However, the two species completely differ in colony structure: highly polygynous and polydomous colonies in C. pygmaea; small, monogynous and monodomous colonies in C. abstinens. They also show, in addition to the shared compounds, significant differences in their Chc profiles and differ in mating and colony foundation behavior. In previous studies, the probable existence of a dual dispersal strategy in C. pygmaea was shown: a long-range dispersal strategy followed by independent colony foundation and a short-range dispersal strategy through budding events associated with seasonal polygyny and polydomy. We hypothesize that in C. pygmaea, polygyny and polydomy could represent a combined evolutionary response to efficiently explore and rapidly saturate patchily distributed habitats that are unstable and subject to a strong seasonality. We also speculate that the polygynous and polydomous colony structure observed in C. pygmaea is a derived condition from the monogyny and monodomy observed in C. abstinens.
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- 2017
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12. Studies on an enigmatic Blepharidatta wheeler population (Hymenoptera: Formicidae) from the Brazilian Caatinga
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Pereira, J. C., Delabie, J. H. C., Lorenzo Zanette, and Quinet, Y.
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Ants ,Blepharidattini ,Semiarid environment ,Northeastern Brazil ,Ergatoid queen - Abstract
Blepharidatta is a rare Neotropical ant genus formed by predatory species whose small colonies nest in soil or leaf-litter. A population of Blepharidatta that presents affinities with Blepharidatta conops Kempf was found in the Caatinga biome, at the “Reserva Particular do Patrimônio Natural Serra das Almas” (RPPNSA), in Crateús (State of Ceará, Brazil). The aim of our study was to obtain data on the nest architecture, size and composition of colonies, foraging behavior, and female castes morphology for this newly found population, and to compare it with other Blepharidatta species, particularly with B. conops. The results show that Blepharidatta sp. and B. conops share key features of their biology such as their basic nest architecture, diet and foraging behavior, and the presence of a single ergatoid queen with a phragmotic head. However, marked differences were also found in head and mesosoma morphology of the queen, nest architecture, colony size, and queen location in the nest. Two alternative hypotheses are presented. The newly found Blepharidatta population represents a new species, possibly endemic to the Caatinga biome or it represents an extreme of the phenotypic variations observed among the populations forming B. conops.
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- 2014
13. Crematogaster pygmaea Revised Status
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QUINET, Y., HAMIDI, R., RUIZ-GONZALEZ, M. X., de BISEAU, J. - C., and LONGINO, J. T.
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Insecta ,Arthropoda ,Animalia ,Biodiversity ,Crematogaster ,Crematogaster pygmaea ,Hymenoptera ,Formicidae ,Taxonomy - Abstract
Crematogaster pygmaea Revised Status Crematogaster pygmaea Forel, 1904:37. Syntype worker: Brazil, Cear�� (Diaz da Rocha) [MHNG] (examined). Emery, Accepted by J. Pitts: 19 Mar. 2009; published: 17 Apr. 2009 45 1922:135: combination in C. (Orthocrema). Forel, 1909:259: variety of brevispinosa. Forel, 1912:235; Emery, 1922:135: revived status as species. Crematogaster abstinens Forel: Longino 2003:30 (incorrect synonymy). Crematogaster sp. prox. abstinens: Heredia et al. 2005. Taxonomic conclusions are based on abundant collections and natural history observations from Fortaleza, State of Cear��, Brazil. These collections were compared directly with the types of C. pygmaea. These are the only collections of C. pygmaea known to date. Crematogaster pygmaea is very close to the widespread C. abstinens. Both species occur sympatrically in Fortaleza, where they are clearly distinct. Crematogaster pygmaea and C. abstinens are uniquely characterized by the combination in the worker of (1) shiny face, (2) subquadrate dorsal face of petiole, (3) appressed tibial pilosity, (4) very wide postpetiole, (5) abundant short stiff setae on face that curve toward the median axis, and (6) complete absence of an anteroventral petiolar tooth. Crematogaster pygmaea differs from C. abstinens in shorter propodeal spines. The propodeal spines of C. pygmaea are relatively triangular in shape, not spiniform, and slightly longer than the maximum diameter of the propodeal spiracle. The propodeal spines of C. abstinens are spiniform and about twice as long as the maximum diameter of the propodeal spiracle (Fig. 1G). Another difference in the zone of sympatry is that C. abstinens has a more heavily sculptured promesonotum, particularly near the juncture of dorsal and lateral surfaces. However, in other parts of the range of C. abstinens this character is variable and approaches the condition seen in C. pygmaea. Crematogaster obscurata is also similar to these species but has a punctate face. Measurements of a worker and a queen were made with a micrometer stage with accuracy to the nearest 0.01 mm. Worker: HL (head length; perpendicular distance from line tangent to rearmost points of vertex margin to line tangent to anteriormost projections of clypeus, in full face view) 0.565, HW (head width; maximum width of head in face view, including eyes if they project beyond the sides of the head) 0.604, SL (scape length; length of scape shaft from apex to basal flange, not including basal condyle and neck) 0.436, EL (eye length, measured along maximum diameter) 0.174, WL (Weber's length; viewing mesosoma in lateral profile, distance from approximate inflection point, where downward sloping pronotum curves into anteriorly projecting neck, to posteroventral propodeal lobes) 0.609, SPL (propodeal spine length; measured from tip of propodeal spine to closest point on outer rim of propodeal spiracle) 0.076, PTH (petiole height; viewed in lateral profile, perpendicular distance from ventral margin to highest point of posterolateral tubercles) 0.124, PTL (petiole length; viewed in lateral profile and measured in same plane as anterodorsal face, distance from inflection point marking juncture of posterolateral lobes and cylindrical posterior portion of segment to anterior inflection point where petiole curves up to condyle) 0.217, PTW (petiole width; maximum width of petiole in dorsal view) 0.217, PPL (postpetiole length; viewed dorsally, perpendicular distance from narrowest point of peduncle joining postpetiolar node and helcium, to line tangent to posteriormost lobes) 0.155, PPW (postpetiole width; maximum width of postpetiole, in same view as and perpendicular to postpetiole length) 0.201. Queen (previously undescribed): HL 0.998, HW 1.330, SL 0.671, EL 0.364, WL 2.402, PTH 0.399, PTL 0.538, PTW 0.574, PPL 0.431, PPW 0.643. Natural History Observations The state of Cear�� belongs to the "caatinga" domain, a 750,000 km2 area of northeastern Brazil with a semi-arid climate. Temperature varies little, with an annual average of approximately 26oC, and rainfall is low (less than 750 mm/year). Rainfall is concentrated in three consecutive months during the southern hemisphere summer (November until June). Crematogaster pygmaea occurs in two phytogeographic zones: the littoral zone stricto sensu and the adjacent savana-like formation called "tabuleiro." The first is a narrow strip of coastal vegetation along the seashore, with dune and mangrove formations. The tabuleiro is a savanna-like formation that occurs close to the coast, on flat sandy plains of northeastern Brazil. The physiognomy of the "tabuleiro" is characterized by dense patches of trees and shrubs surrounded by a grassy cover with scattered low shrubs (Oliveira-Filho 1993). All the observed C. pygmaea colonies were found in these two zones. Colonies could be found very near the sea, in completely sandy areas with only grassy cover. Crematogaster pygmaea was never found in the "caatinga" zone, a seasonal xerophilous thorn woodland/shrubland that prevails on the semi-arid lowlands and covers most of Cear�� state. Detailed observations were made of four C. pygmaea colonies (I, II and III, IV) at sites situated on or near the campus of the State University of Cear�� (3o 47' S - 38o 33' W), in Fortaleza (state of Cear��, northeastern Brazil), about 7 km from the coast. The campus itself is located in the tabuleiro zone. In the study sites the original vegetation was modified by human activities, being in the campus and Fortaleza urban areas. Colony I was located on the campus, in a sandy/clayey area with patches of mango or cashew trees surrounded by dense herbaceous cover. Very close to colony I and physically separated from it by an asphalt road, colony II was in a more open area. The area had rows of square beds with fodder plants (see Fig. 2) separated by sandy/clayey areas covered with sparse herbaceous vegetation. Patches of mango trees, sugar cane and dense herbaceous vegetation surrounded it. Colony III was located on the campus, some 800m from colonies I and II, in an open sandy/clayey area with only herbaceous cover. Colony IV was located outside, but close to the campus, in an open area covered with dense herbaceous vegetation and patches of low shrubs surrounding sports (football) grounds. Detailed maps of colonies I and II were made in July 1999 and October 2006, respectively. To facilitate mapping of colony I, a grid of 0.5m squares was marked out on the whole colony area, using string. The rows of square beds served as references to map colony II (see Fig. 2). All the nest entrances and trails of the two colonies, as well as the plants visited by C. pygmaea workers for food sources, were precisely mapped. Each plant visited by C. pygmaea workers was carefully inspected to identify the food sources explored by the ants. Colony I extended over an area about 26 by 10m (Fig. 2). It consisted of 36 nest entrances connected by nearly 104m of trails that also led the workers to plants where they explored liquid sugary food sources (nectar or honeydew). One hundred herbaceous plants were visited by ants. Nearly 50 % of them (N = 46) were Borreria verticillata G. Mey. plants (Rubiaceae) whose floral nectaries were explored by C. pygmaea workers. Some B. verticillata plants also had scale insects (Coccidae) colonies attended by ants for their honeydew production. The second and third most visited plants (N = 27 and 12 respectively) were two unknown Cyperaceae species where C. pygmaea workers attended scale insect colonies. On the remaining plants (N = 15) (Commelina sp. - Commelinaceae; Mimosa sensitiva L. - Mimosaceae; Turnera subulata Smith - Turneraceae; one unknown species of Papilionaceae; one unknown species of Cyperaceae; one species of unknown family) ants explored sugary secretions from scale insects, aphids (Aphididae), and/or extrafloral nectaries. Colony II had roughly the same size (about 30 by 8m) and consisted of 62 nest entrances connected by nearly 75m of trail network (Fig. 2). More than 50% of the 97 herbaceous plants visited by ants (N = 54) were T. subulata plants (white alder), a common ruderal plant in northeastern Brazil. The petiole of T. s ubu la ta leaves has two large apical extrafloral nectaries that were explored by C. pygmaea workers. The second most visited plant was B. verticillata (N = 27) whose floral nectaries and, sometimes, aphids or scale insect colonies were explored by ants. The remaining plants belonged to Asteraceae, Euphorbiaceae, Fabaceae, Plumbaginaceae and Poaceae families and had scale insect colonies attended by ants. In each colony, one or two groups of nest entrances were disconnected from the main group (Fig. 2). They probably represented colony disjunctions, since preliminary observations showed that the trail network of a C. pygmaea colony is an unstable structure that undergoes size and shape modifications with time. For example, during the dry season the trail network undergoes a great size reduction. In order to investigate nest architecture and composition, 72 C. pygmaea nests were excavated: 20 from colony I, in June and July 2002; 37 from colony II, in June 2003; and 25 from colony IV, in May 2006. For the nests of colony I and the first ten nest excavations of colony II, only queen number and brood presence (colony I), or number and depth of chambers per nest were recorded (colony II). More detailed observations were made with the remaining nests of colony II and those of colony IV: nest depth, number of chambers per nest, depth and size of chambers, number of queens per chamber and presence of brood in chambers. Nest excavation was carried out by digging a deep soil parallelepiped (20 x 20 x 40 cm), with the nest entrance in its center. The whole parallelepiped was carefully laid down on a plastic sheet, and then cut into thin slices with a spatula, starting from the side with the nest entrance. Depth and, when possible, size of each chamber was recorded, as well as the queen number and presence of brood. Thirteen of the 34 active nests (i.e. with at least workers) excavated in June 2003 were brought to the laboratory to count the queens and workers. Finally, the diameter of 52 nest entrances from 4 colonies (colony I, II, I V, and a fifth one) was measured in March 2003 and April 2008. Eleven to 40% of the excavated nests were inactive (Table 1), meaning that there was neither gallery nor chamber below the nest entrance, in spite of workers entering and exiting the nest entrance. Of the remaining, active, nests (i.e. with gallery, chambers, and at least workers in the chambers), almost all (92-100%) contained brood, and 47-71% contained at least one queen (Table 1). Colonies were clearly polygynous (Table 1), with some nests containing more than 10 queens. Nests had a maximum depth of nearly 30cm and each of them was formed by a single straight vertical gallery with 1 to 4 horizontal chambers (Table 2). The depth of the first chamber varied depending on the number of chambers. When there were multiple chambers, the first chamber tended to be shallower (Table 3). Chambers had a circular, or oval, shape with a mean thickness of 4.9 + 0.9 mm (N = 16) and a diameter of roughly 3 cm. Galleries always entered the center of a chamber from above and continued from the center of the chamber floor. Nest entrance had a mean diameter of 1.89 + 0.15 mm (N = 52) and the gallery had exactly the same diameter. It is therefore possible to describe the typical structure of a C. pygmaea nest as a straight vertical gallery, 20 cm in length and 1.9 mm in diameter, with a circular entrance 1.9 mm in diameter, and generally 3 circular or oval chambers that are 5 mm thick and 3 cm in diameter, giving a 6.9 cm3 total nest volume. Nests were measured in the rainy season, when the soil was humid. During the dry season, the soil was very hard, making it almost impossible to dig. However, a few attempts showed that the galleries and chambers were much deeper in the dry season. Fifty queens and 4644 workers were found in the 13 nests analyzed in the laboratory, giving a queen/ worker ratio of nearly 1:100. Foraging activity of C. pygmaea was recorded during four 24 hours periods: the first in February 2000, the second in December 2000, the third in October 2001, and the fourth in September 2006. In each of the first three 24 hour recording periods, all carried out with colony I, activity was recorded at two nest entrances and on one foraging trail. In the fourth one, carried out with colony II, activity was recorded at three nest entrances and on three foraging trails. During a 24 hour period, all ants crossing a point on the selected trail(s), and all ants exiting or entering the selected nest entrances were recorded with a click counter during a 5 minute session, at 1-h intervals. Soil temperature was monitored at each recording point, for each activity measurement. C. pygmaea forages day and night (Fig. 3). However, foraging activity is temperature dependent since it stopped between 10:00 a.m. and midday, when soil temperature exceeded 40oC (Fig. 3). A slight reduction of foraging activity was also observed just before dawn, when soil temperature dropped below 30oC. Foraging activity tended to peak at sunrise, when soil temperature began to rise after low night temperatures (Fig. 3). Foraging activity is high between 24 and 32��C, above which it drops (Fig. 4). Reproductive phenology of C. pygmaea was investigated by excavating about ten nests of colony II and III each month, from March 2005 to March 2006. The number of queens, gynes and males found in each nest was recorded. Rainfall data were obtained from the Cear�� state fundation of meteorology (FUNECE). The mean number of queens per nest was nearly constant (+ 2 queens/nest) during most part of the year (Fig. 5). At the beginning of the rainy season (January to March), it rose to nearly six queens per nest (Fig. 5). Gynes were observed at the beginning of the rainy season, with a mean number reaching up to 17 gynes per nest in February (Fig. 5). Males production began in the dry season, some three months before gyne production, and continued during the rainy season, reaching mean number of up to 9 per nest (Fig. 5). Discussion The presence of several reproductive females in the same nest (polygyny) is frequently observed in ants, and in most cases, nests of polygynous species contain no more than ten queens (Keller, 1993; Crozier & Pamilo, 1996). However, some species have a highly polygynous social structure characterized by a queen/worker ratio between 1:200 and 1:50. Moreover, most of the highly polygynous species so far studied are invasive/ tramp species that are also characterized by lack of hostility between colonies (unicoloniality), like in Linepithema humile, Monomorium pharaonis, Tapinoma melanocephalum, or Solenopsis invicta (Passera, 1994; Tsutsui & Suarez, 2003). This contrasts with the situation observed in C. pygmaea whose high polygynous social struture is not associated with invasive behavior. Moreover, field observations have shown that workers from different colonies interact in a hostile way (Hamidi et al., in prep.). High polygyny associated with non-invasive behavior and territoriality has also been found in Dolichoderus mariae (Laskis & Tschinkel, 2008), a North American species that shares many traits with C. pygmaea. Both are ground-dwelling species with highly polygynous and polydomous colonies whose nests are connected by an above ground trail network, and they heavily rely on sugared solutions collected from hemipteran colonies and/or nectaries. Moreover, in both species, nest location seems to be strongly related to the food source location and there is marked seasonal polydomy, with colony retraction during winter (D. mariae) or dry season (C. pygmaea) and colony expansion during spring-summer (D. mariae) or rainy season (C. pygmaea). It has been suggested that the seasonal polydomy of D. mariae represents a response to the seasonal fluctuations of food source location and abundance, allowing the ants to closely track hemipteran populations (Laskis & Tschinkel, 2008). The polydomy of C. pygmaea could also represent an adaptation to exploit dispersed and rapidly changing food sources (nectaries and hemipteran colonies). The main elements of C. pygmaea nests are consistent with the nest architecture generally observed in ant species that excavate nests in soil, i.e. vertical tunnels connecting horizontal chambers (Tschinkel, 2003). However, compared to other ant species with subterranean nests, C. pygmaea nests are small and very simple, the average nest being no more than a single 20 cm straight vertical gallery connecting three small horizontal chambers, at least during the rainy season. Most ant species whose subterranean nest architecture has been investigated have much more complex nests, like in Pogonomyrmex badius, Solenopsis invicta, Prenolepis imparis or Formica pallidifulva (Tschinkel, 2003). Pogonomyrmex badius, whose deep nests (up to 3.5 m) may contain four or five vertical tunnels connecting up to 150 chambers, is one of the best known examples of such complex nests (Tschinkel, 2004). The smaller and shallower nests of Formica pallidifulva with its multiple branching tunnels are another example (Mikheyev & Tschinkel, 2004). Although formed by a single shallow conical chamber, the nests of Dolichoderus mariae are much larger, with a 930 cm3 mean volume (Laskis & Tschinkel, 2008), than those of C. pygmaea that are only about 7 cm3 in volume. The simple architecture of C. pygmaea nests could be related to the need to have a flexible colony structure, with nests and trail networks able to track food sources that frequently change location. In conclusion, the high polygyny found in C. pygmaea, combined with other prominent features (noninvasive behavior, high polydomy, strong worker/queen dimorphism, ground-nesting habits, simple nest architecture), make this species a particularly interesting model to investigate the selective pressures that allowed the evolution and the maintenance of a social structure in which workers rear genetically distant brood., Published as part of QUINET, Y., HAMIDI, R., RUIZ-GONZALEZ, M. X., de BISEAU, J. - C. & LONGINO, J. T., 2009, Crematogaster pygmaea (Hymenoptera: Formicidae: Myrmicinae), a highly polygynous and polydomous Crematogaster from northeastern Brazil, pp. 45-54 in Zootaxa 2075 on pages 45-53
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- 2009
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14. Crematogaster pygmaea (Hymenoptera: Formicidae: Myrmicinae), a highly polygynous and polydomous Crematogaster from north-eastern Brazil
- Author
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Quinet, Y., Rachid Hamidi, Ruiz-Gonzalez, M. X., Biseau, J. -C, Longino, J. T., Evolution et Diversité Biologique (EDB), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées
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[SDV.EE]Life Sciences [q-bio]/Ecology, environment ,[SDV.BID]Life Sciences [q-bio]/Biodiversity ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2009
15. Antibacterial properties of contact defensive secretions in neotropical Crematogaster ants
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Quinet, Y, primary, Vieira, RHSF, additional, Sousa, MR, additional, Evangelista-Barreto, NS, additional, Carvalho, FCT, additional, Guedes, MIF, additional, Alves, CR, additional, de Biseau, JC, additional, and Heredia, A, additional
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- 2012
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16. ChemInform Abstract: (13E,15E,18Z,20Z)-1-Hydroxypentacosa-13,15,18,20-tetraen-11-yn-4-one 1-Acetate, from the Venom of a Brazilian Crematogaster Ant.
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DALOZE, D., primary, DE BISEAU, J.-C., additional, LECLERCQ, S., additional, BRAEKMAN, J.-C., additional, QUINET, Y., additional, and PASTEELS, J. M., additional
- Published
- 2010
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17. Ants (Hymenoptera: Formicidae) as Carriers of Fungi in Hospital Environments: An Emphasis on the Genera Tapinoma and Pheidole
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Pantoja, L. D. M., primary, Filho, R. E. Moreira, additional, Brito, E. H. S., additional, Aragão, T. B., additional, Brilhante, R. S. N., additional, Cordeiro, R. A., additional, Rocha, M. F. G., additional, Monteiro, A. J., additional, Quinet, Y. P., additional, and Sidrim, J. J. C., additional
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- 2009
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18. Defensive behaviour and biological activities of the abdominal secretion in the ant Crematogaster scutellaris (Hymenoptera: Myrmicinae)
- Author
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Marlier, J.F., primary, Quinet, Y., additional, and de Biseau, J.C., additional
- Published
- 2004
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19. Explosive food recruitment as a competitive strategy in the ant Myrmica sabuleti (Hymenoptera, Formicidae)
- Author
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de Biseau, J.-C., primary, Quinet, Y., additional, Deffernez, L., additional, and Pasteels, J.M., additional
- Published
- 1997
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20. Dynamics of Collective Exploration in the Ant Pheidole Pallidula
- Author
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Detrain, C., primary, Deneubourg, J. L., additional, Goss, S., additional, and Quinet, Y., additional
- Published
- 1991
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21. Spatial specialization of the foragers and foraging strategy in Lasius fuliginosus (Latreille) (Hymenoptera, Formicidae).
- Author
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Quinet, Y. and Pasteels, J.
- Abstract
The spatial specialization in Lasius fuliginosus was investigated in the field by a mass-marking of foragers with colors. In the spring, summer and autumn, foragers exhibit a high degree of persistence, with coefficients of fidelity between 83 and 96%, in using a particular foraging trail, in visiting a particular tree or shrub housing aphid colonies, and even micro-sites like a particular branch. A high degree of fidelity to particular temporary hunting ground areas has also been shown. Trail and aphid site fidelity persist for at least 1 to 3 months and are preserved through the hibernation period (about 5 months). However, in early spring, a period during which food sources are scarce, trail fidelity is lower (coefficient of fidelity: 57%). Spatial specialization develops quickly in foragers recruited to a new permanent food source. Once acquired, the specialization is not rigid since specialized honeydew collectors can shift from a no more rewarding aphid site to other aphid sites of the same trail on which they develop a secondary specialization. The ecological and behavioral aspects of the spatial specialization in L. fuliginosus are discussed with reference to the resource structure of the habitat. [ABSTRACT FROM AUTHOR]
- Published
- 1996
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22. Food and reproductive strategies of the myrmecophilous staphylinid beetle Homoeusa acuminata (aleocharinae) on the foraging trails of its host ant Lasius fuliginosus (Hymenoptera: Formicidae).
- Author
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Quinet, Y. and Pasteels, J.
- Abstract
The trail following behaviour of the adult myrmecophilous beetle Homoeusa acuminata on the foraging trails on the host ant Lasius fuliginosus was examined in June and all the observed behaviours were quantified. The beetle appears as a food robber, using the stowaway behaviour which consists of attaching itself to prey transported by ants to the nest. Foraging trails are also used by the beetles as a meeting place for mating. However, the beetle does not enter into the nest and appears as a symbiont poorly integrated in the social life of its host. [ABSTRACT FROM AUTHOR]
- Published
- 1996
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23. Trail following and stowaway behaviour of the myrmecophilous staphylinid beetle, Homoeusa acuminata, during foraging trips of its host Lasius fuliginosus (Hymenoptera: Formicidae).
- Author
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Quinet, Y. and Pasteels, J.
- Abstract
The behaviour of adult Homoeusa acuminata on trails of its host Lasius fuliginosus was investigated both in the field and in the laboratory. The beetles were active from May to September, accurately following the foraging trails of their hosts up to 20 metres from the nest. Most of the time, they were ignored by the ants, but if attacked they raised their abdomen as a possible appeasement or defensive behaviour. On trails the beetles most probably act as food robbers, feeding on prey collected by ants. The following method, called stowaway behaviour, was used by the beetles: when a beetle encountered an ant carrying a prey back to the nest it jumped on the prey, probably feeding on it while being transported. Laboratory experiments on circular artificial trails demonstrated that H. acuminata follows a water extract of hindguts of the ants, the source of the trail pheromone. Both beetles and ants responded to an artificial trail of 0.03 hindgut equivalent per cm, but the mean distance followed by the beetles was about twelve times higher than that covered by the ants themselves. In contrast, experiments with solutions of the six fatty acids reported as the active components of the trail pheromone showed that the beetles did not respond at all, and that the ants only respond to the fatty acids at a very high concentration. [ABSTRACT FROM AUTHOR]
- Published
- 1995
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24. Food recruitment as a component of the trunk-trail foraging behaviour of Lasius fuliginosus (Hymenoptera: Formicidae)
- Author
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Quinet, Y., Biseau, J.-C. De, and Pasteels, J. M.
- Published
- 1997
- Full Text
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25. Explosive food recruitment as a competitive strategy in the ant Myrmica sabuleti (Hymenoptera, Formicidae)
- Author
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Biseau, J.-C. de, Quinet, Y., Deffernez, L., and Pasteels, J.M.
- Abstract
Summary: Myrmica sabuleti forms mature colonies of about one thousand workers and a few queens. Although living in dry and sunny biotopes, this species avoids foraging during the warmer hours of the day which correspond to the period of the maximum foraging activity of two sympatric species, Formica fusca and F. cunicularia. M. sabuleti is the most frequently observed species on the extrafloral nectaries of Vicia sativa, even during the warmer hours of the day, whereas F. fusca is the most frequent species during those hours at tubes of 1M sucrose solutions placed on the ground. In spite of this temporal segregation, the foraging activity of M. sabuleti and F. fusca overlaps two times a day (10:00-11:00 am and 5:00-8:00 pm). Newly discovered large food sources are exploited by M. sabuleti through an explosively increasing recruitment, whereas workers of F. fusca forage mainly individually. Interference between M. sabuleti and F. fusca was studied when offering sucrose solutions, large dead insects unretrievable by individual foragers of either species (cockroaches), medium-sized insects retrievable by single foragers of F. fusca but not by single M. sabuleti (larvae of Calliphora erythrocephala) and small insects (Drosophila) retrievable by individual foragers of both species. Owing to its rapid recruitment, M. sabuleti is able to displace F. fusca from sucrose solution and large dead prey during the overlaping of the activity cycles of both species. When medium-sized corpses are offered, the issue depends on the speed of the events. F. fusca is able to take the prey away only if it discovers it before M. sabuleti has recruited nestmates. Small dead prey do not lead to interference, but is taken by the first worker that finds it.
- Published
- 1997
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26. ChemInform Abstract: (13E,15E,18Z,20Z)-1-Hydroxypentacosa-13,15,18,20-tetraen-11-yn-4-one 1-Acetate, from the Venom of a Brazilian Crematogaster Ant.
- Author
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DALOZE, D., DE BISEAU, J.-C., LECLERCQ, S., BRAEKMAN, J.-C., QUINET, Y., and PASTEELS, J. M.
- Published
- 1998
- Full Text
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27. Dispersal strategies in the highly polygynous ant Crematogaster (Orthocrema) pygmaea Forel (Formicidae: Myrmicinae).
- Author
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Hamidi R, de Biseau JC, Bourguignon T, Martins Segundo GB, Fontenelle MTMB, and Quinet Y
- Subjects
- Animals, Body Weight, Female, Flight, Animal physiology, Hierarchy, Social, Organ Size, Thorax anatomy & histology, Ants physiology, Movement, Sexual Behavior, Animal physiology
- Abstract
In ants, dispersal strategies and morphology of female sexuals are generally linked to the mode of colony founding. In species using long-range dispersal tactics, queen/worker dimorphism is generally high and young queens are able to initiate new colonies by themselves, using their metabolic reserves. By contrast, in species using short-range dispersal strategies, queen/worker dimorphism is generally low and, due to their limited metabolic reserves, queens have lost the capacity to raise their brood alone and to found their colony independently. Moreover, polygyny is also often associated with short-range dispersal strategies, although the relationship between the number of queens and the dispersal strategy in ants is not clear-cut. Here, dispersal strategies were investigated in C. pygmaea, a highly polygynous and polydomous ant species from northeastern Brazil. Field observations and laboratory experiments show that this ant exhibits a suite of traits that are more commonly associated with long-range dispersal and independent colony foundation: functional wings in both males and females, high queen/worker dimorphism, strong weight loss in mature queens, nuptial flights and, in the lab, ability of young queens to found new colonies in haplometrotic conditions. On the other hand, this species shows a high degree of polygyny with a strong seasonal component, and, at least under laboratory conditions, mature queens seem able to develop propagules if they are accompanied by at least 10 workers. These features strongly suggest that (1) some of the gynes do not engage in a long-range dispersal but become new queens in their mother colony and (2) that budding events are possible in this species. We therefore speculate that C. pygmaea has a dual dispersal strategy probably related to environmental conditions: some gynes engage in long-range dispersal followed by independent colony foundation at the beginning of rainy season, while others mate in the parental colony and are re-adopted leading to high polygyny. During the rainy season, budding events can lead to colony extension and increased polydomy. Polydomy is commonly thought to improve resource discovery and exploitation through decentralized foraging behavior, a significant advantage during the rainy season when food ressources (mainly floral/extrafloral nectaries and hemipteran honeydew) are more abundant and when colony needs for food supplies are highest.
- Published
- 2017
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28. Evolution of a soldier caste specialized to lay unfertilized eggs in the ant genus Crematogaster (subgenus Orthocrema).
- Author
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Peeters C, Lin CC, Quinet Y, Martins Segundo G, and Billen J
- Subjects
- Animals, Ants genetics, Ants ultrastructure, Biological Evolution, Brazil, Female, Microscopy, Electron, Scanning, Ovary physiology, Ovary ultrastructure, Ovum physiology, Reproduction, Species Specificity, Taiwan, Ants anatomy & histology, Ants physiology
- Abstract
Among social Hymenoptera, only some ant genera have more than one morphological kind of non-reproductive adults. Individuals that are bigger than ordinary workers can function for defence and/or food storage. In Crematogaster (Orthocrema) smithi from Arizona, a third caste exists in addition to winged queens and workers; it is intermediate in size, weight and morphology, and individuals lay many unfertilized eggs that are mostly eaten by larvae (Heinze et al., 1995, 1999). We studied another three species belonging to the subgenus Orthocrema: Crematogaster pygmaea from Brazil, Crematogaster biroi and Crematogaster schimmeri from Taiwan. Using scanning electron microscopy and ovarian dissections, we show that 'intermediates' are a patchwork of queen-like and worker-like traits, just as in C. smithi; importantly the combinations differ across species. 'Intermediates' are numerically few in the colonies, and in C. pygmaea they are produced seasonally. Using histology we confirmed the lack of a spermatheca, thus they are not ergatoid queens. Based on the similarity of their mosaic phenotypes with those in other ant lineages, we suggest that Orthocrema 'intermediates' are a soldier caste with a specialized trophic function. This soldier caste has been reported in other Orthocrema species from Madagascar, Guinea and Costa Rica, suggesting that it is widespread in this subgenus., (Copyright © 2013 Elsevier Ltd. All rights reserved.)
- Published
- 2013
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29. Queens defense by workers in the highly polygynous ant Crematogaster pygmaea (Hymenoptera: Myrmicinae).
- Author
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Martins Segundo GB, de Biseau JC, and Quinet Y
- Subjects
- Animals, Anthropometry, Ants anatomy & histology, Female, Sexual Behavior, Animal, Social Behavior, Animal Communication, Ants physiology, Behavior, Animal physiology
- Abstract
Some aspects of the biology of Crematogaster pygmaea, a highly polydomous and polygynous ant, are more commonly found in monogynous species. One such characteristic is the high attractiveness of its queens. In this study, this attractiveness was assessed under varying experimental conditions to investigate the factors responsible for its expression and variation, and to identify the nature of queen attractiveness. It was shown (1) that C. pygmaea queens are highly attractive to the workers that cluster on and around them (retinue), (2) that the attractiveness of C. pygmaea queens is context-dependent, i.e., it increases with increasing degree of potential danger to the queen, (3) that the attractiveness signal of C. pygmaea queens is chemically based, and (4) that this signal is persistent and apparently not colony-specific. The proposed hypothesis is that the C. pygmaea queens constantly release an attractiveness signal that is "read" by the workers, in a dependent way linked to the context, and that the main function of this attractiveness is to protect queens. This protection would have a high adaptive value in the context of the social structure and the reproductive strategies in C. pygmaea., (Copyright © 2012 Elsevier B.V. All rights reserved.)
- Published
- 2012
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30. Venom's antinociceptive property in the primitive ant Dinoponera quadriceps.
- Author
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Sousa PL, Quinet Y, Ponte EL, do Vale JF, Torres AF, Pereira MG, and Assreuy AM
- Subjects
- Acetic Acid, Analgesics pharmacology, Animals, Behavior, Animal drug effects, Carrageenan, Formaldehyde, Hot Temperature, Male, Mice, Pain etiology, Pain physiopathology, Psychomotor Performance drug effects, Venoms pharmacology, Analgesics therapeutic use, Ants, Pain drug therapy, Venoms therapeutic use
- Abstract
Ethnopharmacological Relevance: In northeastern Brazil, Dinoponera (Ponerinae) ants macerate are used to treat ear ache and its sting, rheumatism, and back pain. Such a popular use is a relevant fact that called for experimental evaluation of the antinociceptive activity of Dinoponera venom., Materials and Methods: Dinoponera quadriceps venom (DqV; 5-500 μg/kg; i.v.) or morphine (3.4 mg/kg; s.c.) were evaluated in mice models of nociception (n=8 animals/group). Negative controls received sterile saline (0.9% NaCl; i.v.)., Results: DqV showed 64% protein content and exhibited antinociceptive activity, without affecting motor function, in the tests: formalin (72%), writhing (52%), von Frey (71%) and hot plate (45%). The antinociceptive activity was abolished under protein denaturant conditions., Conclusions: This study provided the first demonstration of the antinociceptive property of Dinoponera quadriceps venom in mice models of chemical, mechanical and thermal nociception, corroborating the popular use and suggesting its potential therapeutic utilization in painful conditions., (Copyright © 2012 Elsevier Ireland Ltd. All rights reserved.)
- Published
- 2012
- Full Text
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31. Ground-foraging ants (Hymenoptera: Formicidae) and rainfall effect on pitfall trapping in a deciduous thorn woodland (caatinga), Northeastern Brazil.
- Author
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Nunes FA, Segundo GB, Vasconcelos YB, Azevedo R, and Quinet Y
- Subjects
- Animals, Brazil, Population Density, Population Dynamics, Rain, Seasons, Ants physiology, Feeding Behavior physiology
- Abstract
The semi-arid Caatinga is the fourth largest biome of Brazil, which biota still remains one of the most poorly known, especially with regard to invertebrate groups. In this study, a ground-foraging ant assemblage was surveyed during one year and the effect of rainfall on pitfall trapping was assessed. The study was performed in an area located in the municipality of Pentecoste (3 degrees 48' S - 39 degrees 20' W), in the State of Ceará. A 200m transect with 20 equidistant sampling points was established. Transect sampling was performed once a month during 12 months, over the period August 2008-August 2009. At each sampling point, a pitfall trap partially filled with a mixture of ethanol and monoethylene glycol was placed at the beginning of each month and remained in the field for seven days. 39 species belonging to six subfamilies and 19 genera, plus two unidentified species, were collected, with Pheidole (10 spp.) and Camponotus (8 spp.) being the taxa with the most species. 23 species were frequent, being found in more than 50% of the 12 transect samplings. Five species had an intermediate frequency (25 to 50%), while 13 were relatively infrequent (less than 25%). Most of the species (22) showed low occurrence, being found in less than 10% of the 240 samples (20 samples each month, during 12 months). Only five species were collected in more than 50% of the samples, those species being also responsible for most of the total abundance (number of captured individuals of all species) observed each month. The species-accumulation curves (observed and estimated) indicated that sampling sufficiency was attained, and that about 92% of the estimated ground-foraging ant fauna had been collected. 40 and 29 species were collected in the dry and rainy season, respectively, with monthly species richness ranging from 13 to 28. The total ant abundance showed a drastic decrease during the rainy season, and a negative linear correlation was found between rainfall and total ant abundance (R2 = 0.68). A similar negative linear correlation was found for species occurrences against rainfall (R2 = 0.71), and for mean number of species per pitfall trap against rainfall (R2 = 0.71). However, some species showed equal abundance, occurrence and mean number of individuals per pitfall trap in both seasons, while others showed a much higher abundance and occurrence during the rainy season. Pitfall trapping as a method to sample ground-foraging ant assemblage of the Caatinga biome and potential factors responsible for lower pitfall trap performance during rainy season are discussed.
- Published
- 2011
- Full Text
- View/download PDF
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