Results 101 to 110 of about 519,530 (231)

Independent Transitions to Freshwater Environments Promote Phenotypic Divergence, Not Convergence, in Stingrays

Integrative And Comparative Biology
Synopsis Instances of convergent or parallel evolution provide a potent model system for exploring contingency and determinism in evolutionary biology. Likewise, the multiple, independent habitat transitions from saltwater to freshwater biomes offer opportunities for studying convergent evolution within and among different vertebrate ...
A Magnuson, M N Dean, J C Weaver, J P Fontenelle, N R Lovejoy, M A Kolmann   +5 more
openaire   +2 more sources

Dangerous Measures: A Case Report and Review of Motoro Ray Envenomation

Toxins
Aquatic envenomations may cause severe tissue injury, neurologic morbidity, and even mortality among those whose leisure and/or occupational activities expose them to marine and freshwater animals. The Motoro ray, or Potamotrygon motoro (also known as an
Philip Dwek, Omer Jamal, Shaleesa Clarke, Kiran Wadhawan, Andrea K. Boggild   +4 more
doaj   +1 more source

Identification of Rays through DNA Barcoding: An Application for Ecologists [PDF]

, 2012
DNA barcoding potentially offers scientists who are not expert taxonomists a powerful tool to support the accuracy of field studies involving taxa that are diverse and difficult to identify.
Owen O'Shea, Austin Chris M., Florencia Cerutti-Pereyra (158763), Mark G. Meekan (111192), Nu-Wei V. Wei (158766), Meekan, M., Bradshaw, C.J.A., Pereyra, Florencia Cerutti, Bradshaw, Corey J A, Meekan, Mark, Bradshaw, Corey, Bradshaw, C., Wei Nu-Wei V., Chris M Austin, O'Shea, O., Austin, Christopher, O'Shea Owen, Nu-Wei V Wei, Pereyra, Florencia, Shea, Owen, Shea, Owen O', Chris M. Austin (158773), Bradshaw Corey J. A., Wei, Nu, Wei, N-W.V., Wei, Nu Wei V, Florencia Cerutti-Pereyra, Cerutti-Pereyra, F., Austin, C., Cerutti-Pereyra Florencia, Owen O'Shea (158769), Meekan, Mark G, Corey J. A. Bradshaw (158770), Meekan Mark G., Mark G Meekan, Austin, C.M., Wei, N., Corey J A Bradshaw, Meekan, M.G., Austin, Christopher M   +39 more
core   +2 more sources

Branchial Na+:K+:2Cl- cotransporter 1 and Na+/K+-ATPase α-subunit in a brackish water-type ionocyte of the euryhaline freshwater white-rimmed stingray, Himantura signifer

Frontiers in Physiology, 2013
Himantura signifer is a freshwater stingray which inhabits rivers in Southeast Asia. It can survive in brackish water but not seawater. In brackish water, it becomes partially ureosmotic, but how it maintains its plasma hypoionic to the external medium ...
Yuen K Ip, Kum C Hiong, Samuel Z. H. Wong, Biyun eChing, Xiu L. Chen, Melody M. L. Soh, You R. Chng, Jasmine L. Y. Ong, Jonathan M Wilson, Shit F Chew   +9 more
doaj   +1 more source

Culture of giant freshwater prawn: Philippines. [PDF]

, 2004
Freshwater prawn thrives in inland bodies of water like rivers, lakes, swamps, irrigation canals, estuaries and even in rivers upstream. More than 100 species were reported to exist worldwide.
Tayamen, Melchor M., Rosario, Westly R.
core   +1 more source

Gill dimensions in near-term embryos of Amazonian freshwater stingrays (Elasmobranchii: Potamotrygonidae) and their relationship to the lifestyle and habitat of neonatal pups

Neotropical Ichthyology
This comparative study of gill morphometrics in near-term embryos of freshwater stingray potamotrygonids examines gill dimensions in relation to neonatal lifestyle and habitat.
Wallice Paxiúba Duncan, Maria Isabel da Silva, Marisa Narciso Fernandes   +2 more
doaj   +1 more source

Hematological and Plasma Biochemical Profile of Two Species of Freshwater Stingrays From the Amazon

Veterinary Research Communications
Abstract The demand for fish by-products and the need for nutritionally adequate and less expensive The evaluation of hematological and plasma biochemical parameters and the subsequent establishment of reference intervals can facilitate the diagnosis of the health status of animals and contribute to animal production, management, and ...
Marcio Quara de Carvalho, Santos, Paulo Henrique Rocha, Aride, Flávia Dayane Felix, Farias, Adriano Teixeira, de Oliveira   +3 more
openaire   +2 more sources

Preliminary genetic assessment of geographically distant populations of the giant freshwater stingray, Urogymnus polylepis (syn. Himantura chaophraya), calls for taxonomic re-examination

Songklanakarin Journal of Science and Technology (SJST)
The giant freshwater stingray, previously classified as Himantura chaophraya Monkolprasit & Roberts 1990, has been re-named as Urogymnus polylepis. Populations of this species have been reported in Indonesia, Myanmar, Bangladesh, and India, while the ...
Jenjit Khudamrongsawat, Pattarapon Promnun, Thanida Haetrakul, Nitiwadee Keschumrus, Chayanis Daochai, Kazi Ahsan Habib, Tassapon Krajangdara, Nantarika Chansue   +7 more
doaj  

Hábitos alimentares e sobreposição trófica das raias Potamotrygon falkneri e Potamotrygon motoro (Chondrichthyes, Potamotrygonidae) na planície alagável do alto rio Paraná, Brasil = Feeding habitats and trophic overlap of the freshwater stingrays Potamotrygon falkneri e Potamotrygon motoro (Chondrichthyes, Potamotrygonidae) in the upper Paraná river floodplain, Brazil

Acta Scientiarum: Biological Sciences, 2006
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 ...
Milza Celi Fedatto Abelha, Alessandra Pasian Lonardoni, Erivelto Goulart, Edson Fontes de Oliveira   +3 more
doaj  

Potamotrygon boesemani (Chondrichthyes: Myliobatiformes: Potamotrygonidae), a new species of Neotropical freshwater stingray from Surinam

Neotropical Ichthyology
Potamotrygon boesemani, new species, is described from the Corantijn river drainage in Surinam. The species has a diagnostic dorsal color pattern formed by deep orange to red ocellated spots of irregular form, encircled by relatively broad black rings ...
Ricardo S. Rosa, Marcelo R. de Carvalho, Cristiane de Almeida Wanderley   +2 more
doaj   +1 more source