Results 91 to 100 of about 519,530 (231)

Occurrence of Four Freshwater Stingrays (Chondrichthyes: Potamotrygoninae) in the Uatumã River Basin, Amazon Region: A Field Study

Fishes
The Amazon region has the largest diversity of freshwater stingrays; however, there are still places where information about this group is scarce. The present work aims to record the occurrence of freshwater stingrays in the Uatumã river basin, Amazonas,
Maria Fernanda S. Gomes, Paulo Henrique R. Aride, Maiko Willas S. Ribeiro, Cristiane C. Guimarães, Tiago C. Nóbrega, Rayana M. Paixão, Adriene Núzia A. Santos, Adriano Teixeira de Oliveira   +7 more
doaj   +1 more source

The Unseen Crisis of Sharks and Rays in Senegal

Ecology and Evolution, Volume 16, Issue 4, April 2026.
This study presents a conservative quantitative assessment of shark and ray landings and trade in Senegal, revealing extensive exploitation of threatened species. Surveys at two major artisanal processing sites in the Casamance region recorded over 170,000 individuals, mostly rays, with nearly all biomass comprising species at risk of extinction, and ...
Rima W. Jabado, Luc Badji, Ryan Charles, Christoph A. Rohner   +3 more
wiley   +1 more source

Freshwater shrimp (Palaemonetes Australis) may be involved in glochidia release from the freshwater mussel(Westraluno Carteri) [PDF]

, 2011
On 27 November 2010 while snorkeling in Canebreak Pool, Margaret River I observed interesting interactions between freshwater shrimp (Palaemonetes australis) and freshwater mussels (Westralunio carteri). First, it is necessary to give a brief explanation
Klunzinger, M.W.
core  

Mitochondrial genetic variation of endemic stingray Potamotrygon magdalenae (Myliobatiformes: Potamotrygonidae) in the middle Magdalena River basin, Colombia

Neotropical Ichthyology
Potamotrygon magdalenae is the only freshwater stingray species reported to be endemic to Colombia, inhabiting the Magdalena-Cauca, San Jorge, Atrato, and Catatumbo River basins.
Carlos Arturo Amado-García, Iván Yesid López-Ardila, Fernando Rondón-González   +2 more
doaj   +1 more source

Fig. 3 in Updated distribution of the endangered freshwater stingray Urogymnus polylepis in Malaysia, with notes on biology and genetics

, 2022
Fig. 3. Length-weight relationship for Urogymnus polylepis. Red = Malaysia, Blue = Thailand, Yellow = Indonesia, Green = India.Published as part of Then, Amy Yee-Hui, Lim, Kean Chong & Loh, Kar-Hoe, 2022, Updated distribution of the endangered freshwater
Then, Amy Yee-Hui, Lim, Kean Chong, Loh, Kar-Hoe   +2 more
core   +1 more source

Feeding behavior of the Neotropical freshwater stingray Potamotrygon motoro (Elasmobranchii: Potamotrygonidae)

Neotropical Ichthyology
The feeding mechanisms of elasmobranchs and their functioning have been receiving growing scientific attention, although less emphasis has yet to be directed towards batoid species.
Akemi Shibuya, Jansen Zuanon, Sho Tanaka
doaj   +1 more source

Physiopathological characterization of the venom of the freshwater stingray Potamotrygon sp C

The FASEB Journal, 2008
Freshwater stingrays are benthic animals that almost always behave passively and preferentially inhabit shallow water. Their tail barb is rigid and serrated, and is covered by glandular epithelium. Injury from the barb is followed by local symptoms such as bleeding, intense throbbing pain,
Juliane Monteiro dos Santos, Janaina C. Santos, Monica F. Lopes, Elineide E. Marques, Carla S. Seibert   +4 more
openaire   +1 more source

The new British Freshwater Algal Flora [PDF]

, 2010
For the past three-quarters of a century the only comprehensive accountof freshwater algae in the British Isles has been West and Fritsch's ATreatise on British Freshwater Algae (2nd edition). It was published in1927, almost 10 years after the death of G.
David John, Alan Brook, Brian Whitton
core  

Two Tetraphyllidean Cestodes from the Freshwater Stingray \u3ci\u3ePotamotrygon magdalenae\u3c/i\u3e Dumeril 1852 (Chondrichthyes: Potamotrygonidae) from Colombia [PDF]

, 1976
Two new tetraphyllidean cestodes are described from the freshwater stingray Potamotrygon magdalenae from Colombia. The new genus Potamotrygonocestus is proposed for P.
Brooks, Daniel R., Thorson, Thomas B.
core  

Diversification and species boundaries of Rhinebothrium (Cestoda; Rhinebothriidea) in South American freshwater stingrays (Batoidea; Potamotrygonidae).

PLoS ONE, 2011
BackgroundNeotropical freshwater stingrays (Batoidea: Potamotrygonidae) host a diverse parasite fauna, including cestodes. Both cestodes and their stingray hosts are marine-derived, but the taxonomy of this host/parasite system is poorly understood ...
Florian B Reyda, Fernando P L Marques
doaj   +1 more source