Results 31 to 40 of about 972 (148)
, 2011 Comparisons of Potamotrygon tigrina with congeners Potamotrygon tigrina is distinguished from all species of Potamotrygon, including P. schroederi, by its unique dorsal color pattern.
De, Marcelo R. +2 more
core +1 more source
The Anatomical Record, EarlyView.Abstract The claspers are the copulatory organs in male elasmobranchs, responsible for directing the semen into the female cloaca (C). However, the microscopic morphology of the claspers remains poorly understood. This study describes the morphology of the claspers and clasper glands (CGs) of cururu stingray (Potamotrygon wallacei) at different ...
Matheus Samuel Cunha Braga +4 more
wiley +1 more source
TRAFFICKING OF ORNAMENTAL FISH IN THE BRAZILIAN AMAZON
Boletim do Instituto de Pesca, 2021 The trafficking of ornamental fish is growing on a yearly basis in the Brazilian Amazon. This represents a serious threat to the biodiversity of the region.
Hélio BELTRÃO +3 more
doaj +3 more sources
Toxins, 2018 Venomous animals are found through a wide taxonomic range including cartilaginous fish such as the freshwater stingray Potamotrygon motoro occurring in South America, which can injure people and cause venom-related symptoms. Ensuring the efficacy of drug
Filipe Silva +5 more
doaj +1 more source
CITES Appendix III: An underused tool for international wildlife trade regulation
Conservation Science and Practice, Volume 8, Issue 9, September 2026.Appendix III of CITES allows Parties to unilaterally extend domestic species protections to international trade, yet it remains vastly underused, covering just 1.3% of listed species. Drawing on the complete historical record since 1975, we show that Appendix III is most effective for endemic species and functions as a highly successful staging ...
Freyja Watters, Phillip Cassey
wiley +1 more source
, 2023 cf. <i>Potamotrygon</i> sp. <p>(Fig. 2 A1, A2)</p> <p>EXAMINED BODY PART. — Isolated teeth.</p> <p>NOTES</p> <p>Specimens figured by Lundberg 1997: fig.
Aguilera, Orangel +4 more
core +1 more source
Acta Scientiarum: Biological Sciences, 2007 As raias Potamotrygon falkneri e Potamotrygon motoro foram avaliadas em relação à composição de suas dietas e a sobreposição do nicho trófico nos períodos de seca (agosto/2004) e cheia (janeiro/2005) na planície alagável do alto rio Paraná, em três ...
Alessandra Pasian Lonardoni +3 more
doaj +1 more source
Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 7, July 2026.ABSTRACT Climate vulnerability in sharks and rays is unevenly distributed across habitats and ecological groups, reflecting differences in exposure pathways and biological constraints. Using an updated application of the Integrated Risk Assessment for Climate Change (IRACC) framework, we conducted a global reassessment of climate vulnerability for 95 ...
Ava Graham, Daniel M. Moore
wiley +1 more source
DNA barcode reveals the illegal trade of rays commercialized in fishmongers in Brazil
Forensic Science International: Synergy, 2020 Sequences of the mitochondrial gene COI (DNA Barcode) were used to identify species of rays and skates commercialized in fishmongers in Brazil. The comparisons of the obtained sequences with previously published data available in NCBI and BOLD showed ...
Raul B. Camacho-Oliveira +6 more
doaj +1 more source
Conservation Letters, Volume 19, Issue 4, July/August 2026.ABSTRACT Global conservation agreements emphasize protected area coverage targets, such as the Kunming–Montreal Global Biodiversity Framework's 30 × 30 target, yet their effectiveness in safeguarding biodiversity remains uncertain. We measure the intersection between marine protected area (MPA) coverage and the distribution of sharks and rays.
Amanda E. Arnold +2 more
wiley +1 more source