中国水产科学2018，Vol.25Issue(3)：586-594,9.DOI:10.3724/SP.J.1118.2018.17265
春夏季长江口邻近水域仔稚鱼种类组成和丰度的月变化
Temporal variation in the composition and abundance of fish larvae and juveniles off the Yangtze River Estuary in spring and summer
摘要
Abstract
The present study investigated the monthly variation in species composition and abundance of fish lar-vae and juveniles from April to July 2015 off the Yangtze River Estuary. A total of 35839 larvae and juveniles were collected, and these included 62 species from 45 genera, 30 families, and 14 orders. Species richness ranged from 22 to 36, depending on month, increased from April to June, and then declined sharply in July. Meanwhile, the total abundance of larvae and juveniles ranged from 11.45 to 114.31 individuals per 100 m3 and increased throughout the study period, with small increases during the first three months and a greater increase in July. The number of dominant species varied by month, ranging from 5 to 13, and the dominant species mainly included Larimichthys polyactis, Stolephorus sp., Chaeturichthys hexanema, Engraulis japonicus, Odontamblyopus rubi-cundus, Acanthogobius ommaturus, and Callionymus sp.. The dominant species showed greater replacement over time. The greatest species richness was observed in the nearshore water (<20 m depth), and the spatial pattern of species richness along the depth gradient varied among months. Surface temperature and species richness were positively correlated (r=0.997, P<0.05) from April to June but negatively correlated from June to July, and in every month, abundance and surface salinity were negatively correlated (r=-0.91, P<0.05) in the nearshore water (<20 m depth). The high-abundance region shifted away from the shore over time.关键词
春夏季/长江口/仔稚鱼/种类组成/丰度Key words
spring/summer/Yangtze River Estuary/larva/juvenile/species composition/abundance分类
农业科技引用本文复制引用
李建生,林楠,凌建忠..春夏季长江口邻近水域仔稚鱼种类组成和丰度的月变化[J].中国水产科学,2018,25(3):586-594,9.基金项目
国家公益性行业(农业)科研专项经费项目(201303047). （农业）
