Growth of the silverside Atherinella brasiliensis in a subtropical estuary with some insights concerning the weight-length relationship
An. acad. bras. ciênc
;
89(3,supl): 2261-2272, 2017. tab, graf
Artigo
em Inglês
| LILACS
| ID: biblio-886789
ABSTRACT
ABSTRACT Specimens of Brazilian silverside (Atherinella brasiliensis, n=9672) with a length range of 1.5 to 14.2 cm were captured in the intertidal areas of the Estuarine Complex of Paranaguá, Brazil, between August 2010 and July 2011. The species' weight-length relationship was represented by the equation W=0.00533 L3.136 with a slightly positive allometry (b>3) and could be divided into two growth stanzas W = W1 + W2; Stanza 1 W1= SW. (0.005239 L3.152); Stanza 2 W2= (1 - SW). (0.000699 L3.913); Switch-Function SW = [1 + e1.204 (L - 11.66)]-1. The breakpoint between the first and second stanza (11.66 cm) matches published values for the estimated size at first maturity of adult females. Frequency distributions indicate that the species is present in the shallow areas of the Estuarine Complex of Paranaguá during all phases of its ontogenetic development, with the recruitment of juveniles taking place between October and November. Modal displacement was monitored throughout 12 months. The von Bertalanffy growth model and longevity was estimated as follow asymptotic length (L∞) of 17.5 cm, growth coefficient (K) of 0.89 (year-1) and longevity (A95) of 3.33 years. We present some considerations with regard to the general methodology for adjusting weight-length relationships.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Peso Corporal
/
Tamanho Corporal
/
Peixes
Limite:
Animais
País/Região como assunto:
América do Sul
/
Brasil
Idioma:
Inglês
Revista:
An. acad. bras. ciênc
Assunto da revista:
Ciência
Ano de publicação:
2017
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
UFPR/BR
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