Data/hora: 12/06/2024 02:36:43

Provedor de dados: | 103
País: | Brazil
Título: | Larvae of migratory fish (Teleostei: Ostariophysi) in the lotic remnant of the Paraná River in Brazil
Autores: | Barzotto,Evelyn; Sanches,Paulo Vanderlei; Bialetzki,Andréa; Orvati,Lilian; Gomes,Luiz Carlos.
Data: | 2015-08-01
Ano: | 2015
Palavras-chave: | Ichthyoplankton; Prochilodus lineatus; Pseudoplatystoma corruscans; Salminus brasiliensis; Upper Paraná River.
Resumo: | ABSTRACT Fish larvae and adults are morphologically distinct from each other and have different ecological requirements. Research on the dynamics of ichthyoplankton provides valuable information about the early stages of the life cycle of fish. This study analyzed the temporal and spatial distribution of the larval stages of three migratory species - Salminus brasiliensis (Cuvier, 1816), Prochilodus lineatus (Valenciennes, 1836) and Pseudoplatystoma corruscans (Agassiz, 1829) - to identify possible spawning areas in the last lotic remnant of the upper Paraná River, in the Brazilian territory. A total of 26 points were sampled monthly from October 2003 to November 2004. The PERMANOVA detected significant differences between the months only for S. brasiliensis (Pseudo-F = 3.88, p = 0.0021) and P. corruscans (Pseudo-F = 3.35, p = 0.004). Among the environmental variables, temperature was the most important and the Mantel test detected a significant correlation between temperature and the densities, only for P. lineatus (r = 0.09, p = 0.03). The species in our data chose for spawning tributaries that are not dammed, of which most are outside conservation areas. Therefore, recruitment, maintenance and possible actions aiming to recover the stocks of these species are dependent on the conservation of tributaries and floodplain lakes in the region, in addition to monitoring to prevent fishing during the reproductive period.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000400270
Editor: | Sociedade Brasileira de Zoologia
Relação: | 10.1590/S1984-46702015000400002
Formato: | text/html
Fonte: | Zoologia (Curitiba)  v.32 n.4 2015
Fonte: | info:eu-repo/semantics/openAccess