Observations on the biology of the burrowing mud shrimps Callianassa tyrrhena and C. candida (Decapoda: Thalassinidea)

Populations of the burrowing shrimps Callianassa tyrrhena and C. candida were studied on tidal flats in the Northern Adriatic Sea. Biometric analysis showed a sexual dimorphism in both species, especially in the size of the propodus of the major cheliped. Slight differences between the two species i...

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Bibliographic Details
Published in:Journal of natural history 1998-11, Vol.32 (10-11), p.1535-1548
Main Author: Dworschak, P.C.
Format: Article
Language:English
Subjects:
Adriatic Sea
Callianassa candida
Callianassa tyrrhena
Ione thoracica
Marine
Parthenopea subterranea
population
relative growth
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Summary:Populations of the burrowing shrimps Callianassa tyrrhena and C. candida were studied on tidal flats in the Northern Adriatic Sea. Biometric analysis showed a sexual dimorphism in both species, especially in the size of the propodus of the major cheliped. Slight differences between the two species in the shape of the propodus and telson were not statistically significant. Size frequency distributions revealed the presence of large animals during all seasons; recruitment by juveniles was observed only in September. Few ovigerous females were found in May and June. The parasitic isopod Ione thoracica and the parasitic cirriped Parthenopea subterranea infected only C. tyrrhena.
ISSN:0022-2933
1464-5262
DOI:10.1080/00222939800771071