Error: The download of the specified resource has failed. FRESHWATER CRAYFISH: Variation in sex ratio in the nobel crayfish <i>Astacus astacus</i>: a reflection of yearly activity changes
Issue Cover image

Article Metrics
logo

Freshwater Crayfish 7(1): 115-120 (1979)

PEER REVIEWED    

Variation in sex ratio in the nobel crayfish Astacus astacus: a reflection of yearly activity changes

Westin L and Gydemo R

Published Online:

Abstract

A natural population of the noble crayfish, Astacus astacus, was followed over four years. All crayfish along a defined stretch of shoreline were caught by light-trapping at monthly intervals during the ice-free season. The sex-ratio among juveniles was approximately 50-50 during the whole year except for June and July when males dominated. Juveniles made up about 30% of the total catch. Among adult crayfish, males dominated all months except July­October, when females dominated. The results reflect the life­history of the crayfish. The frequency of adult females participating in reproduction was estimated and found to be low in the smallest size-group.

Article

References

Supplemental Documents

  • There are no supplementary documents for this article

Cited By

CrossRef Logo

Citations:

Google Scholar Logo

How to Cite

Westin L and Gydemo R. (1979). Variation in sex ratio in the nobel crayfish Astacus astacus: a reflection of yearly activity changes. Freshwater Crayfish 7(1):115-120. doi: .

Author Information

Westin L and Gydemo R

Publication History

Funding Information

 

 

 

Member Login

Lost your password?
Back to Top