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Spawning kinetics in the gilthead sea‐bream, Sparus aurata L. after low doses of human chronic gonadotropin
Author(s) -
Zohar Y.,
Gordin H.
Publication year - 1979
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.1095-8649.1979.tb03675.x
Subject(s) - biology , captivity , ovulation , human chorionic gonadotropin , gonadotropin , saline , endocrinology , medicine , reproduction , sparidae , fish <actinopterygii> , zoology , fishery , ecology , hormone
This paper reports the temporal pattern of hormonally induced spawning in Sparus aurata females reared in captivity. A low dose of human chorionic gonadotropin (100–400 i.u. kg −1 body weight), administered to females with oocytes in the last stages of vitello genesis, induced a daily cycle of maturation, ovulation and spawning of fertilizable eggs. This cyclic pattern lasted for a period of 4–100 days. In fish injected with saline and most of the untreated fish, all vitellogenetic eggs underwent rapid atresia.