Genetic evidences of non-reproductive shoaling in the freshwater fish Salminus brasiliensis

Autor(es)

Ribolli, Josiane ^{[1, 2, 3]} ; Zaniboni-Filho, Evoy ^[2] ; Freitas, Patricia D. ^[1] ; Galetti, Jr., Pedro M. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Lab Biodiversidade Mol & Conservacao, Dept Genet & Evolucao, Rodovia Washington Luis Km 235, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Fed Santa Catarina, Lab Biol & Cult Peixes Agua Doce, Dept Aquicultura, Rodovia SC 406, 3532 Lagoa do Peri, Florianopolis, SC - Brazil

^[3] Univ Fed Sao Carlos, Programa Posgrad Ecol & Recursos Nat, Rodovia Washington Luis Km 235, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Hydrobiologia; v. 815, n. 1, p. 65-72, JUN 2018.
• Citações Web of Science: 2

Resumo

Recent studies have identified patterns of genetic organization during schooling in the reproductive period of several Neotropical freshwater migratory fish. However, population segregation during non-reproductive periods is still unknown for most species. In this study, we investigated the genetic structure of populations of Salminus brasiliensis, a high-value large migratory freshwater fish, sampled during the non-reproductive season. We analysed 89 adults from Uruguay River Basin (Brazil) collected during the two consecutive non-reproductive periods, and assessed the genetic diversity levels using eleven microsatellite loci. Our results showed that populations are genetically structured, suggesting these fish can remain grouped likely due to a cooperative behaviour, not related to reproduction, in a typical shoaling behaviour. Besides, we found high genetic diversity for S. brasiliensis from the Turvo State Park area, highlighting the importance of this conservation unit as a relevant area for maintaining the genetic variability of S. brasiliensis in the Uruguay River. (AU)

• Processo FAPESP: 10/52315-7 - Predadores de topo de cadeia alimentar
• Beneficiário: Pedro Manoel Galetti Junior
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Regular