La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Biological aspects of Medorippe lanata (Linnaeus, 1767) (Brachyura : Dorippidae) from the eastern ligurian sea (Western mediterranean)
Auteurs :	I. Rossetti, Auteur ; P. Sartor, Auteur ; B. Francesconi, Auteur ; M. Mori, Auteur ; P. Belcari, Auteur
Type de document :	Article
Dans :	Hydrobiologia (557 MAR 2006)
Article en page(s) :	21-29
Résumé :	The aim of the present study is to investigate the demographic structure and to identify some aspects of the biology of an exploited population of Medorippe lanata (Brachyura: Dorippidae) in the eastern Ligurian Sea, western Mediterranean. 1364 specimens (639 males and 725 females) of M. lanata were collected on a monthly basis from January to December 2001, in a wide area of the eastern Ligurian Sea usually exploited by the Viareggio 'rapido' trawl fleet. M. lanata represented an important fraction of the discard, both in weight and in number of individuals. Maximum abundance of this species occurred in late summer-early autumn (up to 3369 ind. km(-2) and 50.6 kg km(-2) in August). The overall females:males sex-ratio was 1.13:1, while the monthly sex-ratio did not differ statistically from 1:1 in all months, except in September and October, when females significantly outnumbered males. The sampled population was composed of two cohorts from November to April. Sizes ranged from 10 to 29 mm carapace length (CL) for females and from 9 to

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