Verificación de la marca de eclosión en los otolitos sagitales de larvas de Sardinella aurita (Pisces: Clupeidae) / Verification of the eclossion mark in the sagittal otolith of larvae from the Sardinella aurita (Pisces: Clupeidae)
Rev. biol. trop
;
48(Supl.1): 183-186, dic. 2000.
Artigo
em Espanhol
| LILACS
| ID: lil-503264
ABSTRACT
The study of otolith in larvae is important to determine fish age and growth, essential parameters in the study and management of fisheries resources. In this study, the formation of the hatching mark in Sardinella aurita was verified on ichthyoplankton samples collected off southern Cubagua island, Venezuela, from May 1998 to January 1999. The embryos were kept alive using a culture system until they hatched and daily a group of 10 to 30 larvae were fixed in 95% ethanol. An image analysis system was used to measure morphometric characteristics of larvae and sagittal otoliths. Following are mean values in newly hatched larvae otolith hatching mark distance from nucleus 4.78 m (I.C. 0.36 m, p 0.05 n = 30), increase width 1.46 m (I.C. 0.17 microm, p 0.05, n = 30) and diameter 14.28 m (IC 1.11 m, p 0.05, n = 30). The mean standard length of larvae at age 0 was 3.31 mm (I.C. 0.08 mm, p 0.05, n = 200). The identification of the hatching mark allows the exact calculation of the number of rings in larvae from the natural environment.
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Índice:
LILACS (Américas)
Assunto principal:
Membrana dos Otólitos
/
Peixes
Tipo de estudo:
Estudo prognóstico
Limite:
Animais
Idioma:
Espanhol
Revista:
Rev. biol. trop
Assunto da revista:
Biologia
/
Medicina Tropical
Ano de publicação:
2000
Tipo de documento:
Artigo
País de afiliação:
Venezuela
Instituição/País de afiliação:
Universidad de Oriente/VE
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