Hematological parameters of three freshwater stingray species (Chondrichthyes: Potamotrygonidae) in the middle Rio Negro,Amazonas state |
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| Institution: | 1. Instituto Federal de Educação, Ciência e Tecnologia do Amazonas (IFAM), Campus Manaus Centro (CMC), Amazonas, Brazil;2. Instituto Federal de Educação, Ciência e Tecnologia do Amazonas (IFAM), Campus Coari, Amazonas, Brazil;3. Universidade Federal Rural de Pernambuco (UFRPE), Recife, Pernambuco, Brazil;4. Faculdade Estácio de Manaus, Manaus, Amazonas, Brazil;5. Universidade Federal do Amazonas (UFAM), Manaus, Amazonas, Brazil;6. Instituto Federal de Educação, Ciência e Tecnologia do Amazonas (IFAM), Campus Manaus Distrito Industrial (CMDI), Amazonas, Brazil;7. Instituto Federal de Educação, Ciência e Tecnologia do Amazonas (IFAM), Campus Presidente Figueiredo, Amazonas, Brazil;8. Empresa Brasileira de Pesquisas Agropecuárias (EMBRAPA), Macapá, Amapá, Brazil |
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| Abstract: | This paper aimed to study and compare the hematology of newborns, young, subadults, adult males, adult females and pregnant females of Potamotrygon wallacei (cururu stingray), Potamotrygon motoro and Paratrygon aiereba. Newborn cururu stingrays had lower red blood parameters than those of other development stages. Thrombograms and leukograms showed a conservative pattern between development stage, sexual dimorphism and pregnancy. In P. motoro and P. aiereba, variables relating to red blood parameters, biochemistry and leukograms showed little variation between the species' biological characteristics, thus showing that these variables are not good criteria for differentiating them within the same species. In conclusion, the development stage is an important factor for differentiating hematological properties in the cururu stingray, while this has not been observed in P. motoro and P. aiereba stingrays. |
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| Keywords: | Hematology Ontogeny Potamotrygonidae Sexual dimorphism Pregnancy Comparative |
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