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Titre du Document
Some aspects of the biology of the deep-water crab, Chaceon affinis (Milne-Edwards and Bouvier, 1894) off the Azores
PINHO Mario R. ; GONCALVES Joao M. ; MARTINS Helen R. ; ...
Corporation(s) du ou des auteurs
International Council for the Exploration of the Sea Copenhagen DNK (Commanditaire)
During 1997, quarterly exploratory cruises of the R/V Archipelago were carried out in order to study the deep water crab Chaceon affinis [Res. Camp. Sci. Mónaco Fasc. VII (1894) 1], South of Pico island (Azores) and at the Menez Gwen hydrothermal vent area (SW of the Azores, within the Azorean Economic Exclusive Zone). The crabs were caught with bottom traps according to a specified survey design. Different areas between 300 and 1200 m depth were surveyed, Information from previous collections was also compiled and analysed. A total of 1153 crabs (726 males and 427 females) were caught at depths ranging from 600 to 1100 m on rocky and/or muddy bottoms. Size ranged from 39 to 177 mm carapace length (CL), the males being larger than females. Males were relatively more abundant at depths <800 m and females relatively more abundant at depths >800 m. The greatest abundance occurred at depths from 700 to 800 m. Ovigerous females, which were consistently >70 mm CL, were found only from October to March. An annual reproductive cycle is suggested, Size at first maturity for the females, was estimated to be within the size range of 83-97 mm CL. Other ecological and biological information such as distribution, morphometric aspects related to reproduction, occurrence of parasites and epibionts, are discussed, as well as by-catch species.
Type du document
Conférence : ICES Annual Science Conference, Lisbon, PRT, 1998-09-16
ISSN : 0165-7836 CODEN : FISRDJ
Fisheries research A. 2001, vol. 51, n° 2-3, pp. 283-295 [bibl. : 32 ref.]
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