【摘要】 根据1997-2000年东海23°30′～33°00′N、118°30′～128°00′E海域4个季节调查资料,对东海水螅水母类种类组成及优势种、数量分布、生态类群等作了探讨。结果表明:鉴定到种的水螅水母类有61种,其中侧管水母(Dipleurosomapacificum)、四十字盘水母(Staurodiscustetrastaurus)、无手斜球水母(Hybocodonatentaculatus)和两手拟触丝水母(Paraloveniabitentaculata)等4种是国内首次记录;热带假帽水母(Pseudotiaratropica)、多手毒水母(Toxorchispolynema)和高华丽水母(Aglanthaelata)等3种为东海首次记录。大洋性种有15种,其总N/O值为3.07,外海性种类略强于近海性。半口壮丽水母(Aglaurahemistoma)占绝对优势(64.1%),其分布往往与暖流消长有关。本区水螅水母类可分为近岸广温性、近岸暖水性、外海广温性和大洋暖水性等生态类群;近岸广温类群的种类最多(66%),大洋广温类群丰度较高;它们的演替在一定程度上可反映出不同水系的变化。更多还原

【Abstract】 Based on the data acquisitioned in the seasonal survey from spring through winter seasons carried out in the years of 1997 to 2000 in the East China Sea (23°30′-33°00′N, 118°30′-128°E), the community composition and dominant species of Hydromedusae as well as its abundance distribution and ecological community in the sea were studied. 61 species of Hydromedusae were identified, in which such four species as Dipleurosoma pacificum Agassiz & Mayer, Staurodiscus tetrasturus Haeckel, Hybocodon atentaculatus Uchida and Paralovenia bitentaculata Bouillon et Jangoux were firstly discovered in China. The species of Pseudotiara tropica, Toxorclis polynema and Aglantha elata were newly recorded in the East China Sea. There were 15 oceanic species discovered in the sea with total N/O value being 3.07. The number of oceanic species was slightly higher than that of coastal waters ones. Aglaura hemistoma constituted absolute dominance (64.1%). Its abundance distribution was usually correlated with the growth and decline of warm current. All species of Hydromedusae in the sea were classified into such ecological groups as inshore eurythemic, inshore warm water, highsea eurythermic and oceanic warm water. Most coastal species were eurythermic ones (66%). The abundance of oceanic species was high and the succession of which reflected the change of water system.更多还原