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Effect of methallibure on gonad development and carotenoid content of the fins of Sarotherodon mossambicus ( Tilapia mossambica )
Author(s) -
Lanzing W. J. R.
Publication year - 1978
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.1095-8649.1978.tb04163.x
Subject(s) - biology , tilapia , oreochromis mossambicus , gonad , development of the gonads , juvenile , astaxanthin , fish <actinopterygii> , endocrinology , medicine , fishery , zoology , carotenoid , ecology , food science
Juvenile Sarotherodon mossambicus were exposed to a daily dose of 1 or 2 p.p.m. of the antigonadotropic drug methallibure for a period of seven weeks. The control fish all showed well‐developed gonads and a considerable concentration of astaxanthin in the dorsal fins. The dominant male showed a much higher astaxanthin value than the other fishes. Methallibure completely prevented gonad development. Nevertheless, some astaxanthin deposition did occur in the drug‐treated fish.