Collected reprints: Abstract 3248

Collected reprints

Abstract

Martens, E.; Redant, F. (1986). Protandric hermaphroditism in the brown shrimp , Crangon crangon (L.) , and its effects on recruitment and reproductive potential. ICES Shellfish Commitee, C.M. 37: 1-20

The paper describes the results of histological investigations on the sex change of male brown shrimps, Crangon crangon (L.), and discusses its effects on recruitment and reproductive potential of the shrimp population in the Belgian coastal area. The percentage of males (length range 41-50 mm) with developing oocytes in the testes varied between 2.5-3.0% in August and in October, and 9.2% in September. Data on the sex-ratio of the shrimp population are presented and are analysed in relation to the possible occurrence of sex reversal. Estimates of the possible effect of sex reversal on recruitment to the population showed that only 2.0-6.5% of the recruits and 2.5-8.0% of the females recruiting to the spawning stock are secondary females. The implications of these findings for the management of the shrimp fisheries are briefly reviewed.

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