Trophic ecology and metabolism of two species of nonnative freshwater stingray (Chondrichthyes: Potamotrygonidae)

Autor(es)

Pagliarini, Cibele Diogo ^{[1, 2, 3]} ; Ribeiro, Cristiele da Silva ^{[1, 4, 5]} ; Spada, Lucas ^{[1, 4]} ; Delariva, Rosilene Luciana ^{[1, 4, 5]} ; Araujo Chagas, Jumma Miranda ^{[1, 4, 6]} ; dos Anjos, Luciano Alves ^{[1, 2]} ; Ramos, Igor Paiva ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista UNESP, Dept Biol & Zootecnia, Fac Engn Ilha Solteira, Rua Moncao, BR-15385000 Ilha Solteira, SP - Brazil

^[2] Univ Estadual Paulista UNESP, Programa Posgrad Ciencias Biol Zool, Inst Biociencias Botucatu, Rua Prof Dr Antonio Celso Wagner Zanin 250, BR-18618689 Botucatu, SP - Brazil

^[3] Univ Estadual Paulista UNESP Julio de Mesquita Fi, Inst Biociencias Botucatu, Rua Prof Doutor Antonio Celso Wagner Zanin S-N, BR-18618689 Botucatu, SP - Brazil

^[4] Univ Sao Paulo, Programa Posgrad Ciencias Biol Fisiol Geral, Inst Biociencias, Rua Matao, Travessa 14, 321 Cidade Univ, BR-05508090 Sao Paulo, SP - Brazil

^[5] Univ Estadual Oeste Parana UNIOESTE, Programa Posgrad Conservacao & Manejo Recursos Na, Ctr Ciencias Biol & Saude, Rua Univ 2069, BR-85819110 Cascavel, PR - Brazil

^[6] Univ Estadual Paulista UNESP, Programa Posgrad Biol Anim, Inst Biociencias Letras & Ciencias Exatas, Rua Cristo vao Colombo 2265, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Hydrobiologia; v. 847, n. 13 MAY 2020.
• Citações Web of Science: 0

Resumo

The stingrays Potamotrygon amandae and Potamotrygon falkneri are nonnative species established in the Upper Parana basin. Although they are widely distributed, few studies on their diets or respective metabolic responses exist. Therefore, the aim was to evaluate the dietary composition, trophic niche breadth and lipid/protein concentrations in muscle and hepatic tissues of these two species, as well as the interrelationships between them. The individuals were collected in two areas on the Upper Parana River. The stomachs and samples of muscle and liver tissues were taken for analysis. A broad dietary spectrum was observed for both species, along with differences in dietary composition, with a higher consumption of detritus by P. amandae and Baetidae by P. falkneri. No differences were observed in the trophic niche breadth. Regarding the metabolic variables, differences were only found in the hepatic protein, with a higher content observed in P. falkneri. A significant positive correlation was observed between items of animal origin and detritus with muscle protein for this species. This shows that such feeding habits, which are characteristic of a generalist, influenced the metabolism of the species and possibly contributed to the successful adjustment of the species to new habitats in the Upper Parana River. (AU)

• Processo FAPESP: 16/11736-6 - Metabolismo lipídico de raias Potamotrygon falkneri durante a reprodução
• Beneficiário: Lucas Spada
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 15/21936-0 - Caracterização da dieta de Potamotrygon falkneri e Potamotrygon amandae (Myliobatiformes, Potamotrygonidae) em área de ocorrência não natural, no alto rio Paraná, SP
• Beneficiário: Cibele Diogo Pagliarini
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica