franja-sup-Home franja-sup-UV

EspañolEnglish

Volume 45 - Suppl. 1 - 2010
Article

 


Reproductive biology of Graus nigra (Perciformes, Kyphosidae) on the coast of the Northern of Chile

Héctor Flores1 y Andrés Smith2


1Departamento de Acuicultura, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile
2Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile

 

E-mail: hflores@ucn.cl

 

We describe gonad development and spawning time and size at first sexual maturity of Graus nigra, at Northern Chile, using fish collected by spearing from July 1998 to July 1999. We used macroscopic characterization

and histological sections to describe states of gonadic development and we calculated time of spawning, gonadosomatic index (IGS), gonad index (IG) and condition index (K). We estimated size at first maturity using relative increment of IGS and size at 50% maturity. We found that spawning occurs in spring and size of maturity for females was estimated to be between 39 and 41 cm (Lt) and for males between 42 and 49 cm (Lt), depending on the method of analyzis used.

 

Key words: Reproduction, spawning, oocyte, rocky shore fishes

 

pdficon-rbmoDownload

 
atasehir evden eve nakliyat avcilar evden eve nakliyat umraniye evden eve nakliyat beylikduzu evden eve nakliyat sisli evden eve nakliyat bahcelievler evden eve nakliyat