Reproductive cycle and biochemical changes in the gonads of the fresh water crab barytelphusa cunicularis

Diwan, A.D.; Nagabhushnam, R.

Indian Journal of Fisheries 21(1): 164-176

1974


ISSN/ISBN: 0970-6011
Accession: 006316643

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Abstract
The annual breeding cycle of the crab B. cunicularis was determined by measuring monthly the size of the gonad relative to the size of the animal. Gonad size peaked in the rainy season (June-Sept.) showing the maximum breeding activity. Monthly histological observations of the gonads revealed that ripening of the gonads started during March and extended until May. By June the gonads of most of the individuals attained full maturity and spawning began. Spawning terminated by the end of Sept. and the gonads entered a quiescent period. Monthly changes in the biochemical constituents of gonads were studied for 1 yr to determine their variability in the course of the reproductive cycle. During the ripening of the gonads, glycogen, fat and protein contents were higher. During the spawning period all values fell considerably reaching a minimum at the end of the spawning season. During gonad maturation glycogen, fat and protein contents increased.