Feeding habits of the shortnose guitarfish, Zapteryx brevirostris (Müller and Henle, 1841) (Elasmobranchii, Rhinobatidae) in southeastern Brazil

Marion, C.; Júnior, Teodoro Vaske; Gadig, Otto Bismarck Fazzano; Martins, Itamar Alves

doi:10.1590/s1519-69842011000100013

Cited by 15 publications

(21 citation statements)

References 20 publications

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“…However, other hypotheses are that individuals use different food resources in areas occupied by other species, thereby avoiding interspecific competition or also could be due to different food availability in different locations. In contrast to the present work, a study conducted on the São Paulo coast showed that Z. brevirostris exhibited a preference for Decapoda, followed by Polychaeta, Amphipoda, Isopoda and Cumacea (Soares et al, 1992;Marion et al, 2011). In another study on the coast of Argentina, Amphipoda, Polychaeta and Cephalochordata were the most abundant items in the diet , corroborating the results of the present study mainly by the considerable presence of Cephalochordata.…”

Section: Discussionsupporting

confidence: 83%

Feeding comparisons of four batoids (Elasmobranchii) in coastal waters of southern Brazil

et al. 2014

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Food partitioning between species is a common strategy for avoiding resource competition which allows the coexistence of two or more species in the same place. In order to evaluate the feeding of four species of batoids regularly caught by artisanal fisheries in southern Brazil, the present study aimed to analyse and compare the diet of the four batoid species. The Chola guitarfish, Rhinobatos percellens, had a specialized diet, consisting predominantly of blue crabs Callinectes sp., followed by teleost fish. The Lesser guitarfish Zapteryx brevirostris also had a very specialized diet, consuming mainly on Polychaeta, followed by Caridea shrimp. The Cownose ray, Rhinoptera bonasus, fed mainly on Ophiuroidea, followed by Gastropoda and Bivalvia. Finally, the Rio skate Rioraja agassizi, fed on teleost fish, Gammaridae, Caridea shrimp and Dendrobranchiata shrimp. An analysis of similarity showed significant differences among species in their diet. The trophic levels of the batoids in this study are ,4.0, placing them in intermediate trophic levels. The analysis of the diets indicates that feeding differs substantially among the four species, suggesting a partitioning of food resources available in the environment.

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Section: Discussionsupporting

confidence: 83%

Feeding comparisons of four batoids (Elasmobranchii) in coastal waters of southern Brazil

et al. 2014

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“…feeders; G7 = piscivores; G8 = ophiuroid and crab feeders; G9 = polychaete feeders; G10 = amphipod and polychaete feeders. See table 1 for fish species codes The diet composition of the species analyzed in the Santos region was consistent with that found for the Southeastern region of Brazil (SOARES, 1989;SOARES et al, 1992;MUTO et al 2001;VAZZOLER, 2001;CORRÊA et al, 2005;CARVALHO;SOARES, 2006;VERA;MARION et al, 2011;SOARES, 2011), though the prey contributions to the diet are different for some species.…”

Section: Discussionsupporting

confidence: 77%

Trophic Groups Of Demersal Fish Of Santos Bay And Adjacent Continental Shelf, São Paulo State, Brazil: Temporal And Spatial Comparisons

et al. 2014

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A B S T R A C TThe temporal and spatial variations of feeding habits and trophic groups of demersal fish species of Santos Bay and the adjacent continental shelf were investigated. The samples were taken in September 2005 and March 2006 by bottom otter trawling. The stomach content analysis of 2,328 specimens of 49 species showed most fish fed on a large range of food items but relied heavily on shrimp, crabs/swimming-crabs, amphipods, mysids, polychaetes, ophiuroids, squids, and teleosteans. The species were classified into ten trophic groups. Shrimp were an important food source in the Santos bay and inner shelf, while ophiuroids were important prey for predators of the middle shelf. Many species relied on crabs/swimming-crabs during the summer, especially on the middle shelf. The spatial and temporal variability in food resource utilization by fish were related to the pattern of distribution and abundance of their prey. The predation on shrimp and crabs/swimming-crabs seems to be related to the water mass dynamics of the region. Intraspecific comparisons demonstrated that most of the species display spatial and/or temporal variation in their diet. The demersal ichtyofauna can also be divided into the more general categories of piscivores, nektonic invertebrate feeders, benthic invertebrate feeders and planktonic invertebrate feeders. R E S U M OA variação temporal e espacial dos hábitos alimentares e dos grupos tróficos de peixes demersais abundantes na baía de Santos e plataforma continental adjacente foi investigada. As amostras foram obtidas em setembro de 2005 e março de 2006, utilizando-se rede de arrasto de fundo. A análise dos conteúdos estomacais de 2.328 exemplares de 49 espécies demonstrou que a maioria se alimentou de uma grande variedade de presas, destacando-se os camarões, caranguejos/siris, anfípodes, misidáceos, poliquetas, ofiuróides, lulas e teleósteos. De acordo com as presas principais, os peixes foram agrupados em dez grupos tróficos. Os camarões foram presas importantes na baía e plataforma interna, e os ofiuróides apenas na plataforma média. Caranguejos/siris tiveram grande importância na dieta de várias espécies durante o verão, em especial na plataforma média. A variação espacial e temporal na alimentação dos peixes esteve associada ao padrão de distribuição e abundância de suas presas. A ingestão de camarões e caranguejos/siris está, provavelmente, associada à dinâmica das massas de água na região. Comparações intraespecíficas demonstraram que a maioria das espécies apresenta variação espacial e/ou temporal na dieta. A ictiofauna demersal pode ser categorizada em grupos tróficos mais abrangentes: piscívoros, comedores de invertebrados nectônicos, comedores de invertebrados bentônicos e comedores de invertebrados planctônicos.

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“…In contrast, small fish and squid can also be preyed on by larger individuals of Pellona harroweri and Chirocentrodon bleekerianus, respectively (Muto et al 2008). Several benthivorous fish also undergo ontogenetic dietary changes, feeding on peracarid crustaceans and more sedentary invertebrates before changing their diets to decapods (mainly crabs) and fish (Muto 2004, Chalom et al 2008, Marion et al 2011). In the food web of Santos, low δ 15 N signature of amphipods (6.0−6.3 ‰) (T. N. Corbisier pers.…”

Section: Food Web Structurementioning

confidence: 99%

Biomagnification of mercury through the food web of the Santos continental shelf, subtropical Brazil

Muto¹,

Soares²,

Sarkis³

et al. 2014

Mar. Ecol. Prog. Ser.

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This study was conducted on the continental shelf surrounding a large metropolitan region on the coast of São Paulo State, Southeast Brazil. This region harbours a large industrial plant and the largest port in Latin America, both of which release pollutants into the Santos−São Vicente estuarine system. High levels of Hg have been reported in sediments and fish from the estuaries and Santos Bay; however, data for the biota in offshore waters are scarce, and the biomagnification of Hg across the food web here has never been assessed. In this study, the trophic structure of the Santos shelf was addressed through the carbon and nitrogen stable isotope compositions of different species across a trophic gradient. We determined the total Hg levels (THg, dry weight) of invertebrates and fish to estimate the rate of biomagnification of this metal in the benthic and pelagic food webs. The lowest mean THg levels were found in zooplankton (0.006 µg g ). Overall, the Hg concentration in fish was below the recommended limit for human consumption. The THg and δ 15 N were positively correlated in both food webs; however, the rate of biomagnification was higher and the basal Hg was lower in the pelagic food web. These differences may be related to the differing bioavailability of mercury in water and sediment, the higher diversity of prey and more complex feeding interactions in the benthic food web, and metabolic differences among different taxa.

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Feeding habits of the shortnose guitarfish, Zapteryx brevirostris (Müller and Henle, 1841) (Elasmobranchii, Rhinobatidae) in southeastern Brazil

Cited by 15 publications

References 20 publications

Feeding comparisons of four batoids (Elasmobranchii) in coastal waters of southern Brazil

Feeding comparisons of four batoids (Elasmobranchii) in coastal waters of southern Brazil

Trophic Groups Of Demersal Fish Of Santos Bay And Adjacent Continental Shelf, São Paulo State, Brazil: Temporal And Spatial Comparisons

Biomagnification of mercury through the food web of the Santos continental shelf, subtropical Brazil

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