THE EFFECT OF SALINITY ON THE DISTRIBUTION OF COPEPODA IN THE JIULONG ESTUARY

The effect of salinity on the distribution of copepoda in the Jiulong Estuary is studied in the present paper. The analysis of the samples collected during February 1983-January 1984 shows that the salinity of the Jiulong Estuary varies from 0.04 at Station E (head of estuary) to 31.7 at Station C (mouth of estuary). The distribution of copepoda is obviously affected by salinity. The results of the investigation show that the number of species, Shannon-Weaver H' index of diversity, species richness d and species evenness J' of copepoda increase with increasing salinity. Especially between the Station D and the Station C, being dominated by three predominant species. But, on the other hand, the total number of individuals apears to decrease with increasing salinity. According to the relation of distribution of copepoda with salinity, the copepoda may be divided into five ecological groups, i.e. fresh-water, low-salinity estuarine, meso-salinity estuarine, neritic and oceanic groups. Their horizontal succ     

中国海洋枝角类的研究——Ⅱ.分布

海洋枝角类的种类很少,迄今还仅发现11种,其中只有8种(鸟喙尖头溞Peniliaavirostris Dana、中型大眼溞Podon intermedius Lilljeborg、刘氏大眼溞Podon leuckarti G.O.Sars、史氏大眼溞Podon schmackeri Poppe、多型大眼溞Podon polyphemoides(Leuckart)¹⁾、诺氏僧帽溞Evadne nordmanni Loven、刺尾僧帽溞Evadne、spinifera P.E.Müller和肥胖僧帽溞Evadne tergestina Claus)被认为是真正的海洋枝角类.