Results 41 to 50 of about 3,578 (213)

Reproductive cycle, nutrition and growth of captive blue spotted stingray, Dasyatis kuhlii (Dasyatidae) [PDF]

At Burgers' Ocean 7 male and 3 female blue spotted stingrays, Dasyatis kuhlii were born over a period of 4.5 years. This paper describes the experiences of the captive breeding results of this species. The first two young died within 2 days of birth. One
Janse, M., Schrama, J.W.
core   +3 more sources

A comparison of the effects of environmental ammonia exposure on the Asian freshwater stingrayHimantura signiferand the Amazonian freshwater stingrayPotamotrygon motoro [PDF]

Journal of Experimental Biology, 2003
SUMMARYThe white-edge whip tail ray Himantura signifer inhabits a freshwater environment but has retained the capability to synthesize urea de novo through the arginine-ornithine-urea cycle (OUC). The present study aimed to elucidate whether the capacity of urea synthesis in H. signifer could be upregulated in response to environmental ammonia exposure.
Ip, Y.K., Tam, W.L., Wong, W.P., Loong, A.M., Hiong, K.C., Ballantyne, J.S., Chew, S.F.   +6 more
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The influence of environmental bacteria in freshwater stingray wound-healing

Toxicon, 2011
Invasion by bacteria can influence the course of healing of wounds acquired in aquatic environment. In this study, the bacteria present in Potamotrygon motoro stingray mucus and in the Alto Paraná river water were identified, and their ability to induce tissue injury and resist antibiotics was determined. Biochemical identification analysis showed that
Domingos, Marta O., Franzolin, Márcia R., dos Anjos, Marina Tavares, Franzolin, Thais M.P., Barbosa Albes, Rosely Cabette, de Andrade, Gabrielle Ribeiro, Lopes, Rossivan J.L., Barbaro, Katia C.   +7 more
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Anindobothrium n. gen. (Eucestoda: Tetraphyllidea) Inhabiting Marine and Freshwater Potamotrygonid Stingrays

The Journal of Parasitology, 2001
Anindobothrium n. gen. is proposed to accommodate Caulobothrium anacolum inhabiting Himantura schmardae from Colombia, and 2 new species, one inhabiting Potamotrygon orbigny in Brazil and the other inhabiting Paratrygon aereiba in Venezuela. Members of the new genus resemble members of Pararhinebothroides, Rhinebothroides, and Anthocephalum by having ...
Marques, FPL, Brooks, D. R., Lasso, C. A.   +2 more
openaire   +4 more sources

Ingestion of catfish by freshwater stingray: possible mistake or inexperience [PDF]

Biota Neotropica, 2009
We report an individual of the freshwater stingray Potamotrygon falkneri caught with a decomposing catfish, Pimelodella gracilis, stuck in its oral cavity. The ingestion of catfishes by stingrays is possibly rendered difficult or hazardous due to the serrated spines on the dorsal and pectoral fins of this prey type.
Garrone Neto, Domingos, Uieda, Virginia Sanches   +1 more
openaire   +4 more sources

An Integrated Approach to Determining the Risk of Overexploitation for Data-Poor Pelagic Atlantic Sharks [PDF]

, 2008
Assesses the risk of over-exploitation of sharks in Atlantic longline fisheries using three metrics based on multivariate statistics as a way to make management recommendations for species with limited data.

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Mitotic Chromosome Preparations of Freshwater Stingrays

, 2015
The technique for obtaining mitotic chromosomes proposed by Foresti et al. (1981) when applied in freshwater stingrays didn’t result in good quality chromosome preparations. Only a few studies have used this technique to obtain good quality chromosomes in this fi sh group (Valentim et al. 2006; Cruz et al. 2011).
Paes da Cruz, V., Foresti, F.
openaire   +2 more sources

Branchial localization of acid (A‐type) and base (B‐type) excreting ionocytes in Amazonian stenohaline freshwater Potamotrygon ray

Journal of Fish Biology, EarlyView.
Abstract The branchial epithelium of Potamotrygon—a member of the only strictly freshwater elasmobranch family Potamotrygonidae—was observed via immunohistochemistry, and two distinct forms of ionocytes were identified. The acid (A‐type) and base (B‐type) secreting cells with respective basolateral–apical localizations of Na+/K+‐ATPase–Na+/H+ exchanger
M. W. Rossi, C. M. Wood, A. L. Val, J. M. Wilson   +3 more
wiley   +1 more source

Injuries caused by freshwater stingrays in the Tapajós River Basin: a clinical and sociodemographic study

Revista da Sociedade Brasileira de Medicina Tropical
INTRODUCTION Freshwater stingray envenomations are an important cause of morbidity in riverine populations living in various regions of Brazil. The sequelae include temporary or permanent disability.
Paulo Afonso Martins Abati, Pasesa Pascuala Quispe Torrez, Francisco Oscar de Siqueira França, Fabio Lambertini Tozzi, Flávio Mileo Bacelar Guerreiro, Suellen Aline Torres dos Santos, Sheyla Mara Silva de Oliveira, Vidal Haddad Junior   +7 more
doaj   +1 more source

Stingray venom activates IL-33 producing cardiomyocytes, but not mast cell, to promote acute neutrophil-mediated injury

Scientific Reports, 2017
One of the hallmarks of acute inflammation is neutrophil infiltration of tissues. We investigated molecular mechanisms implicated in acute neutrophilic inflammation induced by the venom of a freshwater stingray (Potamotrygon cf. henlei) in mice.
Janaina Cardoso dos Santos, Lidiane Zito Grund, Carla Simone Seibert, Elineide Eugênio Marques, Anderson Brito Soares, Valerie F. Quesniaux, Bernhard Ryffel, Monica Lopes-Ferreira, Carla Lima   +8 more
doaj   +1 more source