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Sphaeroma Walkeri Stebbing (Isopoda, Sphaeromatidae) Introduced Into and Established in Hong Kong

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La présence de Sphaeroma walkeri à Hong Kong constitue une extension significative mais non signalée jusqu'à présent de sa distribution dans la mer de Chine méridionale. L'introduction s'est probablement produite au début des années 1970. A Hong Kong, la distribution de S. walkeri est limitée par les basses salinités et l'exposition à l'action des vagues. S. walkeri est généralement associé à des ensembles d'encroutements évolués, dans les zones abritées avec des salinités modérées. Une densité de 12,521/m2 a été enregistrée sur un casier de mariculture lourdement encrouté (biomasse de l'encroutement 21,5 kg/m2). Des échantillons de la population résidente et provenant de la coque du M. V. "Gu Lang Yu", qui assure le service entre Hong Kong et Xiamen (Amoy) montraient une distribution de taille uni-modale. Leurs longueurs du corps moyennes ne présentaient pas de différences significatives (p<0,05). Cependant leurs sex-ratios et les pourcentages de femelles ovigères étaient bien différents.

Affiliations: 1: Fisheries Research Station, 100A Shek Pai Wan Road, Aberdeen, Hong Kong; 2: 3rd Institute of Oceanography, National Bureau of Oceanography, People's Republic of China; 3: Department of Zoology, The University of Hong Kong, Hong Kong

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/content/journals/10.1163/156854085x00224
1985-01-01
2017-02-21

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