Effects of food supply on the reproduction of the convict cichlid, Cichlasoma nigrofasciatum

摘要: Cichlasoma nigrofasciatum, the convict cichlid, is a biparental, substrate-spawning, Central American cichlid. Male-female pairs were kept for 4 months on one of three food rations: high–1 g daily; medium–1 times per week; low–1 week. The number spawnings was directly related to ration. fecundity females low and medium rations declined. At all inter-spawning interval egg size increased during experiment. Egg positively ration length interval, but latter inversely Females high grew in weight while those lost weight. Histological examination ovaries at end experiment suggested that reduced proportion oocytes become vitellogenic. experiment, total, gonad liver given significantly No similar, significant effect found males, although growth males Ration had no detectable histological appearance testes.