Data/hora: 16/06/2024 03:30:36

Provedor de dados: | 83
País: | Brazil
Título: | Can weight/length relationship predict size at first maturity? A case study with two species of Characidae
Autores: | Fontoura,Nelson F.; Jesus,Anamélia S.; Larre,Gabriel G.; Porto,Juliana R.
Data: | 2010-01-01
Ano: | 2010
Palavras-chave: | Allometric growth; Polyphasic growth; Growth stanza; Reproduction; Fish.
Resumo: | A weight/length relationship was established for Astyanax jacuhiensis (Cope, 1894) (n = 370) and Cheirodon ibicuhiensis Eigenmann, 1915 (n = 701), from samples taken monthly in Fortaleza Lagoon, Cidreira, Rio Grande do Sul, from December 1991 through November 1992. Both species showed a polyphasic allometric growth pattern, each stanza described by an independent power equation controlled by a switch function. For C. ibicuhiensis, this change in the growth pattern occurred at 2.948 cm standard length (SL), close to published sizes for the attainment of female maturity. The change in the growth pattern of A. jacuhiensis (SL = 3.481 cm) was below the predicted size at first maturity, and merits further investigation. Although not conclusive, our data suggest that a complex growth pattern is frequent in nature, and perhaps is not usually identified because trends are obscured by natural variability. Despite the increased complexity resulting from the application of a more-complex equation, the identification of a change in the growth pattern could indicate important aspects of fish biology, including the attainment of sexual maturity.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000400013
Editor: | Sociedade Brasileira de Ictiologia
Relação: | 10.1590/S1679-62252010005000013
Formato: | text/html
Fonte: | Neotropical Ichthyology  v.8 n.4 2010
Fonte: | info:eu-repo/semantics/openAccess