title: Ecophysiological interactions and water-related physicochemical parameters among freshwater stingrays.
abstract: The objective of this study was to compare and correlate the ecology of neonates and young individuals of Potamotrygon wallacei, Potamotrygon motoro and Paratrygon aiereba with regard to their hematological profile and the physicochemical parameters of the water that they inhabit. Principal component analysis (PCA) on the complete blood count revealed total variation of 72.92%, thus demonstrating a differentiation system for oxygen demand. On the other hand, P. motoro was considered to be an intermediate species, given that its complete blood count characteristics interacted with both P. wallacei and with P. aiereba. The interaction among the biochemical variables was shown to total 64.67% of the factors. This allowed differentiation of P. wallacei from P. aiereba, while P. motoro maintained an intermediate position. These characteristics of differentiation within the preferred environment corroborate the PCA of the present study and confirm that these species can be differentiated through considering the complete blood count and biochemical parameters. The PCA on water properties showed 68.57% differentiation, mainly comprising the x axis (49.44%). It can be affirmed that P. motoro has the capacity to inhabit the preferential areas of P. wallacei and P. aiereba, as well as occupying localities in which other stingrays are not found. In conclusion, P. wallacei presents patterns differentiating it from P. aiereba, while P. motoro is a species that presents intermediate characteristics. The latter can be considered to be a more broadly distributed species regarding its ecophysiological characteristics.
authors: Instituto Federal de Educação, Ciência e Tecnologia do Amazonas - IFAM, Campus Manaus Centro - CMC, Av. Sete de Setembro, 1975, CEP 69020-120, Manaus, AM, Brazil.
authors: A T
authors: AT
authors: Oliveira
authors: Universidade Federal Rural de Pernambuco - UFRPE, Campus Recife, Av. Dois Irmãos, s/n, CEP 52171-900, Recife, PE, Brazil.
authors: M L G
authors: MLG
authors: Araújo
authors: Faculdade Estácio do Amazonas, Av. Constantino Nery, s/n, CEP 69050-001, Manaus, AM, Brazil.
authors: J R G
authors: JRG
authors: Lemos
authors: Instituto Federal de Educação, Ciência e Tecnologia do Amazonas - IFAM, Campus Coari, Estrada Coari Itapéua Km 2, s/n, CEP 69460-000, Coari, AM, Brazil.
authors: M Q C
authors: MQC
authors: Santos
authors: Instituto Federal de Educação, Ciência e Tecnologia do Amazonas - IFAM, Campus Presidente Figueiredo, Av. Onça Pintada, 1308, CEP 69735-000, Presidente Figueiredo, AM, Brazil.
authors: J
authors: J
authors: Pantoja-Lima
authors: Instituto Federal de Educação, Ciência e Tecnologia do Amazonas - IFAM, Campus Manaus Distrito Industrial - CMDI, Av. Danilo Areosa, 1672, CEP 69735-690, Manaus, AM, Brazil.
authors: P H R
authors: PHR
authors: Aride
authors: Empresa Brasileira de Pesquisas Agropecuárias - EMBRAPA, Rodovia Juscelino Kubitschek, s/n, Km 5, CEP 68903-419, Macapá, AP, Brazil.
authors: M
authors: M
authors: Tavares-Dias
authors: Laboratório de Ciências Fisiológicas, Universidade Federal do Amazonas - UFAM, Manaus, Av. General Rodrigo Octávio Jordão Ramos, 3000, CEP 69077-000, Manaus, AM, Brazil.
authors: J L
authors: JL
authors: Marcon
mesh_terms: D000818:Animals; D005618:Fresh Water / Q000737:chemistry*; D006403:Hematologic Tests; D000071421:Life History Traits; D012860:Skates, Fish / Q000097:blood / Q000254:growth & development / Q000502:physiology*