Premium
Genetic and demographic variation among colour morphs of cabrilla sea bass
Author(s) -
Medioni E.,
Finiger R. Lecomte,
Louveiro N.,
Planes S.
Publication year - 2001
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.2001.tb00559.x
Subject(s) - biology , otolith , bass (fish) , sea bass , zoology , serranidae , mediterranean sea , mediterranean climate , fishery , fish <actinopterygii> , ecology
The Mediterranean cabrilla sea bass Serranus cabrilla exhibits two colour morphs (red and yellow) that appear to be depth segregated, with yellow individuals found below 20 m and red ones found above 20 m. Morphology and otolith analyses show that yellow fish are larger and older. There were similar allelic frequencies between colour morphs, but significant differences in the genotypic frequencies with an increase of excess of heterozygotes in yellow specimens. It is proposed that the yellow fish are older and develop from younger red fish that have migrated to deeper water.