Data/hora: 12/06/2024 05:16:48

Provedor de dados: | 83
País: | Brazil
Título: | Variation in the structure of the ichthyoplankton community in the lower Paraíba do Sul River
Autores: | Teixeira,Gabriel E.; Bialetzki,Andréa; Soares,Bruno E.; Souza,Guilherme; Caramaschi,Érica P.
Data: | 2019-01-01
Ano: | 2019
Palavras-chave: | Drought; Eggs and larvae; Migratory species; Reproductive period; Spawning area.
Resumo: | ABSTRACT The Paraíba do Sul River is affected by extensive water collection for supply, organic and industrial pollution, and dams. Nonetheless, the ichthyofauna maintains biodiversity and sustains artisanal fisheries. This study analyzes the composition, abundance and distribution of fish larvae, an important approach to determine the reproductive period and spawning sites. The sampling occurred from August 2011 through February 2013 in five sites at a transect between the banks on the lower reach of the Paraíba do Sul River. A total of 5,412 larvae belonging to 20 taxa was captured. The predominant order was Characiformes. Larvae of Prochilodus spp. and Leporinus spp. were the most abundant; larvae of Brycon insignis, an endangered species, were present. Fewer larvae were collected in the second reproductive cycle during a severe drought. The absence of eggs indicates that the study area is not used for spawning, and highlights the need for studies in the main channel and in the tributaries of the Paraíba do Sul River. Fish larvae need to have access to the marginal lagoons along the lower stretch of the river, an area which is the object of disputes between fishermen and farmers.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000500208
Editor: | Sociedade Brasileira de Ictiologia
Relação: | 10.1590/1982-0224-20180004
Formato: | text/html
Fonte: | Neotropical Ichthyology  v.17 n.4 2019
Fonte: | info:eu-repo/semantics/openAccess