大源湖虾类种类组成、时空分布及生物量估算  

Species Composition,Spatio-temporal Distribution and Biomass of Shrimps in the Dayuan Lake

作　　者：秦海明[1] 李钟杰[2] 张堂林[2] 洪一江[3] 

机构地区：[1]曲阜师范大学生命科学学院,山东省曲阜市273165 [2]中国科学院水生生物研究所,湖北省武汉市430072 [3]南昌大学,江西省南昌市370049

出　　处：《曲阜师范大学学报（自然科学版）》2007年第2期101-105,共5页Journal of Qufu Normal University(Natural Science)

基　　金：国家"十五"攻关专题(2004BA526B05);湖北省"十五"攻关项目(2004AA201A);山东省教育厅科技计划项目(J05I02);曲阜师范大学科研启动基金资助

摘　　要：利用“蹦网”(pop-net)采样,调查了龙感湖一个湖汊—大源湖的虾类种类组成、空间分布,估算优势种类的生物量.在2002年冬季的31个采样点和2003年春季42个采样点中共采集到虾类2707尾,属于甲壳纲,十足目的2科5属.秀丽白虾(Exopalaemon modestus Heller)是大源湖虾类的优势种,占采样总数量的84.1%.根据水深分布特征和水生植被的分布格局,划分生境类型,苦草生境是各虾类分布最多的生境,冬季优势种秀丽白虾在苦草生境中的密度是8.14 ind/m2,生物量是1.59 g/m2.春季分别是2.98 ind/m2,1.04 g/m2.春季水深对虾类的分布影响较小,冬季虾类主要分布在深水区.表明水生植被是影响虾类分布的主要环境因子;在冬季,水深成为影响虾类分布的主要环境因子之一.The species composition, spatio-temporal distribution and biomass estimation of shrimps in the Dayuan Lake, Huangmel county, Hubei province, are investigated by sampling with pop-net in the winter of 2002 and spring of 2003. The total of 2707 individuals belong to 5 species, 5 genera and 2 families. The dominant species is exopalaemon modestus, which contributes 84.1% to the total. According to water depth and the type and cover of vegetation, three habitat types are classified： Vallisnerria spiralis habitat, Myriophyllum spicatum habitat and naked habitat, respectivey. In the winter of 2002,the dominant shrimp species prefer the Vallisnerria spiralis habitat. In the Vallisnerria spiralis habitat, the dominant species has the highest density （8.14 ind/m^2）. The biomass is 1.59 g/m^2. Also the shrimps prefer the Deep water area. In the spring of 2003, the dominant species has the highest density （2.98 ind/m^2）. The biomass is 1.04 g/m^2 in the Vallisnerria spiralis habitat. While the water depth is not a dominant effect factor to the shrimps＇ distribution. The distribution of aquatic vegetation is the dominant environment factor that affectes the distribution of shrimps. In winter, the water depth is also a dominant effect factor to the shrimps＇ distribution.

关 键 词：虾类 时空分布 种群密度 生物量 大源湖 

分 类 号：Q958.11[生物学—动物学]