2003～2005年大亚湾水螅水母类生态研究

Study on ecology of Hydromedusae in Daya Bay from 2003 - 2005

根据2003年12月-2005年5月对大亚湾纬度22．563°以北海域进行的7个航次海域生态环境监测资料,对大亚湾水螅水母类的种类组成及优势种、数量分布、区系特征等作了探讨,结果表明:本次调查,大亚湾共出现水螅水母类40种,其中大洋性种有6种,其总N／O值为5．67,表明本海区水螅水母类的近岸性较强;四叶小舌水母(Liriope tetraphylla)是第一优势种,占水螅水母丰度的27．59％;大亚湾海域水螅水母类,其动物地理区划属印度-西太平洋区印-马亚区。

Based on the data from 7 times marine habitat monitorings from 2003.12 to 2005.5 in Daya Bay, the community composition and dominant species of Hydromedusae as well as its abundance distribution and faunal features at sea were studied. 40 species of Hydromedusae were identified, in which there were 6 oceanic species discovered with total N/O value being 5.67. The number of coastal species was higher than that of oceanic waters ones. Liriope tetraphylla constituted the first dominance （27.59%）. The fauna of Hydromedusae in Daya Bay belong to Indo-Malayan Subregion of Indo-West-Pacific Region.