Unravelling the foraging behavior of the southern stingray, Hypanus americanus (Myliobatiformes: Dasyatidae) in a Southwestern Atlantic MPA

Freitas, Renato Hajenius Aché de; Aguiar, Aline A.; Freitas, Ana Karina C. H. A.; Lima, Sérgio M. Q.; Valentin, Jean Louis

doi:10.1590/1982-0224-20180131

Cited by 8 publications

(4 citation statements)

References 41 publications

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“…Both individuals had grown to a disk width of 22 cm, which is well above the 14.3 ± 2.8 cm reported for neonate bluespotted ribbontail rays (Santos Ferreira, 2013). Thus, their abnormal pectoral disk did not seem to affect their survival, despite the pivotal role of the (posterior) pectoral fin in batomorph feeding and locomotion (Blevins & Lauder, 2012; Freitas et al., 2019; Rosenberger & Westneat, 1999). This may be because, in contrast to most deformities (Ribeiro‐Prado et al., 2008), the resulting body shape of our specimens does not appear to be hydrodynamically inefficient but instead somewhat resembles the body plan of certain skate species (Last et al., 2016).…”

Section: Discussionmentioning

confidence: 99%

RETRACTED: Aerial imagery reveals abnormal stingrays, Taeniura lymma (Myliobatiformes: Dasyatidae), in the central Red Sea

Ciocănaru,

Nieuwenhuis,

Ostrovski

et al. 2024

Ecology and Evolution

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While morphological abnormalities have been widely reported in batomorphs, ontogenetic deformities of the posterior pectoral fin are rare. In this paper, we present two individuals of the bluespotted ribbontail ray, Taeniura lymma (Forsskål, 1775), with symmetrically deformed posterior pectoral fins. Both individuals were observed through aerial imagery on a coastal sandflat in the central Red Sea (22.30° N, 39.09° E). The similarity of this symmetrical deformity in both individuals indicates it likely has a genetic base. However, lacking access to the specimens, the ultimate cause of the abnormality remains uncertain. The incomplete disk closure did not seem to affect survival, as both individuals had reached a disk width of 22 cm, well above the typical birth size of the species. Our observations constitute both the first report of a morphological abnormality in T. lymma and the first record of a batomorph with a symmetrically deformed posterior pectoral fin.

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Section: Discussionmentioning

confidence: 99%

RETRACTED: Aerial imagery reveals abnormal stingrays, Taeniura lymma (Myliobatiformes: Dasyatidae), in the central Red Sea

Ciocănaru,

Nieuwenhuis,

Ostrovski

et al. 2024

Ecology and Evolution

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“…Similarly, it was observed for the coasts of America by Szczepanski and Bengtson (2014) in Delaware Bay, North Atlantic; Molina and Cazorla (2015) in Northern Patagonia, South Atlantic, and Coasaca‐Céspedes et al (2019) in Northern Peru, South Pacific. Individuals of this genus can also dig holes to unearth their prey using water jets propelled by their gills toward the sediment and not by flapping like other members of the Myliobatidae family (Freitas et al, 2019), which allows them to access different mollusk or crustacean species (Gregory et al, 1979).…”

Section: Discussionmentioning

confidence: 99%

Feeding guilds among batoids in the northwest coast of the Baja California Sur, Mexico

Reyes‐Ramírez

Valdéz

Elorriaga‐Verplancken

et al. 2022

Marine Ecology

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Research on the feeding habits of batoids provides information of intra and interspecific interactions of this taxon in marine ecosystems. We analyzed 832 stomachs of nine ray species collected from the artisanal fishery on the Northwest coast of Baja California Sur (NBCS). We identified 79 prey items assembled in five trophic groups (crustaceans, fish, mollusks, polychaetes, and sipunculidae). Results indicated that the red crab Pleuroncodes planipes was the most important prey in the diet of the seven batoid species. A low dietary similarity of the rays was observed, which evidenced different feeding strategies. In this regard, we identified four well‐separated trophic guilds. Each guild was characterized by the consumption of specific prey: (1) Hypanus dipterurus and Narcine entemedor that fed mostly on polychaetes; (2) Rostroraja velezi and Gymnura marmorata fed mostly on fishes (Clupeidae and Batrachoididae); (3) Hypanus longus, Myliobatis californica, and Platyrhinoidis triseriata fed on crustaceans (Munnidae) and Sipunculus worms; and (4) Pseudobatos productus and Zapteryx exasperata fed on crustaceans (Portunidae) and fishes (Synodontidae and Batrachoididae). We concluded that batoids off the NBCS show prey sharing between the different species.

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“…Despite the fact that both species are hyperbenthivorous and the diet overlap could increase species competition, interspecific associations may also increase foraging efficiency (Paijmans et al, 2019). Stingrays perform foraging traits which expose the benthic fauna (Freitas et al, 2019), facilitating prey catchability.…”

Section: Oceanographic Features Driving the Community Dynamicsmentioning

confidence: 99%

Functionality and Effectiveness of Marine Protected Areas in Southeastern Brazilian Waters for Demersal Elasmobranchs

et al. 2021

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Ensuring the efficacy of Marine Protected Areas (MPAs) requires that adequate management strategies be implemented according to the MPA’s objectives. Within the scope of species conservation, achieving MPA objectives demands understanding of the role played by MPAs for the target species. In 2014, Brazilian stakeholders and experts set the action plan for elasmobranchs’ conservation, which intended to create new protected areas and expand the existing ones. Nevertheless, more than 65% of Brazilian elasmobranch species are threatened by anthropogenic pressures such as fisheries and habitat loss. In addition, their ecological aspects are not well studied, which might jeopardize the success of the proposed actions. To assess the functionality and effectiveness of two no-take MPAs for sixteen demersal species, the Wildlife Refuge of Alcatrazes (WRA) and the Tupinambás Ecological Station (TES), we evaluated the community structure, space-time variations in functional diversity and changes in fishery indicators. Community dynamics were driven by inshore intrusion and time persistent effects of a cold and nutrient-rich water mass, the South Atlantic Central Water, which increased the relative abundance of species, functional groups, and overall diversity. Spatially, the heterogeneity of benthic habitats, due to the action of stronger waves in specific parts of the MPAs, reflects a diverse community of benthic invertebrates, explaining differences in relative abundance and similarities in space use by the functional groups. Regarding effectiveness, the MPAs make up a key network with the surrounding protection areas to support the ecosystem maintenance on the central and northern coast of the São Paulo state. The establishment of the TES has positively influenced the community throughout the years while the recent creation of the WRA may have promoted some improvements in fisheries indicators for a threatened guitarfish. We propose different functions of the Alcatrazes archipelago for each species and suggest some measures to enhance not only elasmobranch conservation but also the MPAs’ effectiveness.

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Unravelling the foraging behavior of the southern stingray, Hypanus americanus (Myliobatiformes: Dasyatidae) in a Southwestern Atlantic MPA

Cited by 8 publications

References 41 publications

RETRACTED: Aerial imagery reveals abnormal stingrays, Taeniura lymma (Myliobatiformes: Dasyatidae), in the central Red Sea

RETRACTED: Aerial imagery reveals abnormal stingrays, Taeniura lymma (Myliobatiformes: Dasyatidae), in the central Red Sea

Feeding guilds among batoids in the northwest coast of the Baja California Sur, Mexico

Functionality and Effectiveness of Marine Protected Areas in Southeastern Brazilian Waters for Demersal Elasmobranchs

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