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The biology of the Indo‐Pacific squirrelfish, Sargocentron rubrum (Forsskål), a Suez Canal migrant to the eastern Mediterranean
Author(s) -
Golani D.,
BenTuvia A.
Publication year - 1985
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.1095-8649.1985.tb04025.x
Subject(s) - biology , fecundity , mediterranean climate , suez canal , otolith , mediterranean sea , fishery , population , ecology , fish <actinopterygii> , demography , water resource management , environmental science , sociology
A biological study of the adult population of the Suez Canal migrant, the squirrelfish, Sargocentron rubrum , in the Mediterranean coast of Israel, was carried out between October 1979 and October 1980. Sargocentron rubrum in the Mediterranean has a short spawning season lasting from July to August. The estimated fecundity varied from 108 000 to 646 000 oocytes per mature female. The largest ripe oocytes reach a diameter of 200 μm. The ratio of males to females was found to be 1:2. Hyaline rings on otoliths were used for aging. Growth rate was obtained by back calculation and by using von Bertalanffy's equation. The results obtained from both methods were close, 94mm S.L. after 16 months, 125–127 mm after 28 months, 143 144mm after 40 months and 155 mm after 52 months. Age groups older than 4 years were not found in the present study. The descriptions of early stages of development were based on samples collected by dip and neuston nets along the Mediterranean coast of Israel.