Abstract
The present paper investigates the carapace width compositions of soft-shell males Chionoecetes opilio caught by Danish seiners and the effectiveness of prohibition of catching soft-shell males in order to keep the optimum sex ratio at 0.47 (ratio of the number of terminal molt males with hard-shell to the number of multiparous females). The sex ratio was estimated to be 0.37 in the present fishing intensity for multiparous females, hard-shell and soft-shell males in the Sea of Japan.Soft-shell males were mainly less than 100mm carapace width and non-terminal molt regardless of carapace size, and terminal or non-terminal molt cannot mate with multiparous females. It seems that the abundance of recruitment to functional maturity males with hard-shell decreases due to the catch of soft-shell males.It was ascertained that the optium sex ratio would be maintained at the present fishing condition for hard-shell males with fishing coefficient 0.5 year-1 decreased effort for multiparous females and prohibition of soft-shell males catch.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
