摘要
对茂名文昌鱼的形态特征和部分生态习性进行了描述和分析。结果表明:茂名文昌鱼在分类位置上与白氏文昌鱼Branchiostoma belcheri相近,主要外部形态特征与厦门及北部湾产的白氏文昌鱼无明显区别,只是个体稍大;消化道内残留食物成分以泥沙碎屑为主,鉴定出可辨生物成分有53种,大部分为底栖硅藻,也有少量甲藻和底栖桡足类等;茂名文昌鱼全年都有性成熟个体,主要繁殖季节在春季;底质和水深对不同大小个体的茂名文昌鱼分布有影响。
This paper describes morphological characters and some biological behaviours of lancelet Branchiostoma collected from Maoming, Guangdong province. The lancelet species was identified as Branchiostoma belched Gray, in which the main external morphological characters was no found to have distinct differences from one collected from Xiamen or Beibu Gulf, expect the larger body size. The food items were predominantly silt and oddment in alimentary canal of the lancelets from Maoming, and 53 species of life components were identified. These species consisted of bottom diatoms mostly, some dinoflagellates and bottom copepodas. Mature individuals appeared in each survey months in the whole year, but the peak spawning occurred in spring. The distribution of different sizes of individuals varied with bottom quality and water depth.
出处
《大连水产学院学报》
CAS
CSCD
北大核心
2008年第2期110-115,共6页
Journal of Dalian Fisheries University
基金
广东省自然科学基金资助项目(33981)
茂名市文昌鱼保护区建设规划(省级)项目
关键词
文昌鱼
茂名
形态特征
生态习性
Branchiostoma belched
Maoming
morphological characteristics
biological behaviour
