Stomach contents of the pelagic stingray (Pteroplatytrygon violacea) (elasmobranchii: dasyatidae) from the tropical atlantic

Véras, Dráusio Pinheiro; Júnior, Teodoro Vaske; Hazin, Fábio Hissa Vieira; Lessa, Rosângela; Travassos, Paulo; Tolotti, Mariana Travassos; Barbosa, Taciana Martins

doi:10.1590/s1679-87592009000400008

Cited by 12 publications

(9 citation statements)

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“…It feeds on fish, cephalopods, pteropods and small crustaceans (Véras et al. ; Jacobsen & Bennett, ). Despite extraocular muscles in P. violacea and D. hypostigma being smaller and having similar sizes (Table ) when related to EYL (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…The oscillatory swimming mode and abiotic factors such as light and visibility could have allowed new angles to the visual field and favored the development of its eyeball, leading to a shift in the kind of prey captured. It feeds on fish, cephalopods, pteropods and small crustaceans (V eras et al 2009;Jacobsen & Bennett, 2013). Despite extraocular muscles in P. violacea and D. hypostigma being smaller and having similar sizes (Table 1) when related to EYL (Fig.…”

Section: Discussionmentioning

confidence: 99%

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Comparative anatomy of the extraocular muscles in four Myliobatoidei rays (Batoidea, Myliobatiformes)

2016

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Extraocular muscles are classically grouped as four rectus and two oblique muscles. However, their description and potential associations with species behavior are limited. The objective was to characterize extraocular muscles in four Myliobatoidei rays from diverse habitats with divergent behaviors. Heads (10 per species) of Dasyatis hypostigma, Gymnura altavela, Mobula thurstoni and Pteroplatytrygon violacea were decalcified and dissected to characterize and describe extraocular muscles. Principal component analysis (PCA) was used to evaluate relationships between muscle length and species; for P. violacea, D. hypostigma and G. altavela, these were qualitatively and quantitatively consistent with the general pattern of extraocular muscles in vertebrates. In contrast, for M. thurstoni, the two oblique muscles were completely fused and there was a seventh extraocular muscle, named m. lateral rectus b (both were apparently novel findings in this species). There were also significant differences in eye disposition in the chondrocranium. The PCA axis 1 (rectus muscles) and PCA axis 2 (oblique muscles) accounted for 98.47% of data variability. Extraocular muscles had significant differences in length and important anatomical differences among sampled species that facilitated grouping species according to their life history. In conclusion, extraocular muscles are not uniform in all vertebrate species, thereby providing another basis for comparative studies.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Comparative anatomy of the extraocular muscles in four Myliobatoidei rays (Batoidea, Myliobatiformes)

2016

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“…Similarly, Véras et al. () found crustaceans, specifically the deepwater shrimp Heterocarpus ensife , to be a prominent prey item for pelagic stingrays caught in the southwestern equatorial Atlantic Ocean. Teleost fishes were the third most prevalent prey taxa, with unidentifiable teleosts occurring in highest abundance, followed by monocanthid filefishes and Hippocampus spp.…”

Section: Discussionmentioning

confidence: 89%

Combined gut-content and stable isotope trophic analysis of the pelagic stingray Pteroplaytrygon violacea (Bonaparte, 1832) diet from the western North Atlantic Ocean

2017

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Summary The understanding of trophic relationships is vital for correctly modeling ecosystems and ecosystem effects of fisheries removals. The pelagic stingray is found in epipelagic sub‐tropical and tropical waters worldwide and is a common bycatch in pelagic longline fisheries. Between August 2008 and November 2011, 156 specimens (81 males; 75 females) were collected during pelagic longline fishing operations in the US South Atlantic Bight and Gulf of Mexico. Stomach content analyses found that the major prey items were cephalopod molluscs (59.18%), followed by actinopterygiian fishes (37.75%), and decapod crustaceans (35.71%). These concentrations of prey items found in the stomachs coincide with previous studies done in the Pacific Ocean. In contrast to previous studies that found high percentages of empty stomachs (63%), the current percentage of empty stomachs was much lower (25.6%), likely due to shorter times between collection and inspection. Stable isotope analysis (δ13C and δ15N) was performed on white muscle in order to correlate the trophic position with gut‐content analysis. The δ13C values ranged from ‐18.81‰ to ‐16.70‰, while the δ15N ranged from 6.11‰ to 11.88‰. Modeling of stable isotope data suggest that while squid are occasionally an important part of the pelagic stingray diet, prey usually consist of shrimp and other pelagic crustaceans. Pelagic stingrays fed within two trophic levels, but their prey appeared to feed on different carbon sources than those found in other pelagic elasmobranchs. A deeper understanding of the pelagic stingray diet sources can help fisheries management as it begins to transition into ecosystem‐based management.

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“…The pelagic stingray is the only species of the batoid family Dasyatidae that is fully pelagic (Wilson and Beckett 1970), and is distributed in oceanic areas within the top 100 m of deep waters (Wilson and Beckett 1970;Last and Stevens 1994). Pelagic stingrays have a worldwide distribution, with highest abundance in tropical and subtropical regions, but are also found at higher latitudes (Tortonese 1956;Wilson and Beckett 1970;Last and Stevens 1994;Menni et al 1995;Mollet 2002;Hemida et al 2003;Domingo et al 2005;Ellis 2007;Véras et al 2009;Zacharia et al 2011).…”

Section: Introductionmentioning

confidence: 99%

“…In Brazil, very little has been published on the species, with studies of natural history being especially scarce (Siqueira and Sant'Anna 2007;Ribeiro-Prado and Amorim 2008;Ribeiro-Prado et al 2009;Véras et al 2009). As a result, the actual status of their stock(s) in the south-western and equatorial Atlantic, as in other areas of the world, is still largely unknown.…”

Section: Introductionmentioning

confidence: 99%

Reproductive biology of the pelagic stingray, Pteroplatytrygon violacea (Bonaparte, 1832), in the equatorial and south-western Atlantic Ocean

Véras

Hazin

Branco-Nunes

et al. 2014

Mar. Freshwater Res.

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From October 2005 to March 2010, a total of 480 pelagic stingray, Pteroplatytrygon violacea, specimens, 188 females and 292 males (0.64 female : 1 male), were taken in the equatorial and south-western Atlantic by the commercial tuna longline fishery and their reproductive biology was studied. Disc widths (DW) ranged from 28.0 to 66.0 cm for females and from 34.0 to 59.6 cm for males. Size at first sexual maturity was estimated at ~48.0 cm DW (first pregnant female) for females and ~41.0 cm DW for males. Ovarian fecundity, considering only follicles larger than 0.5 cm in diameter, ranged from 1 to 17 follicles per female, while the uterine fecundity of embryos in pregnant females in Stages 2 and 3 ranged from 1 to 5 embryos per female. The sex ratio between the embryos was almost equal (1.08 female : 1 male) and the size at birth was 19.0 cm DW.

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Stomach contents of the pelagic stingray (Pteroplatytrygon violacea) (elasmobranchii: dasyatidae) from the tropical atlantic

Cited by 12 publications

References 11 publications

Comparative anatomy of the extraocular muscles in four Myliobatoidei rays (Batoidea, Myliobatiformes)

Comparative anatomy of the extraocular muscles in four Myliobatoidei rays (Batoidea, Myliobatiformes)

Combined gut-content and stable isotope trophic analysis of the pelagic stingray Pteroplaytrygon violacea (Bonaparte, 1832) diet from the western North Atlantic Ocean

Reproductive biology of the pelagic stingray, Pteroplatytrygon violacea (Bonaparte, 1832), in the equatorial and south-western Atlantic Ocean

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