欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
为了研究鲢（Hypophthalmichthys molitrix）、鳙（Aristichthys nobilis）两种鱼食物组成的空间变化，分析了2010年7月至2011年10月在洱海古生和北部两采样点逐月采集或收集的共93尾鲢和71尾鳙的肠道内含物，对其食物组成的季节变化、空间变化及与太湖新银鱼（Neosalanx taihuensis）的食物重叠进行了研究。结果表明，鲢、鳙全年摄食的饵料生物数分别为75属和64属。根据相对重要性指数（IRI%），微囊藻（Microcystis）溞和象鼻（Bosmina）为两种鱼的主要饵料类群。鲢、鳙的食物组成呈明显的季节变化，这与饵料生物的季节变化密切相关。在空间上，两种鱼在古生摄食的浮游植物比例大于北部，这是由不同区域饵料生物组成差异导致的结果。Schoener重叠指数显示鲢、鳙与太湖新银鱼之间的食性重叠不显著（E〈0.6）。
英文摘要：
To study the spatial and seasonal variations of food composition of Hypophthalmichthys molitrix and Aris-tichthys nobilis and the diet overlap with Neosalanx taihuensis, gut contents of 93 Hypophthalmichthys molitrix and 71 Aristichthys nobilis in Lake Erhai were collected from July 2010 to October 2011. The results showed that 75 and 64 genus of preys ingested by H. molitrix and A. nobilis, respectively. Microcystis and Bosmina sp. were the dominant preys of the two fish species based on the index of relative importance （IRI%）. The seasonal variations of food compo-sition of the two fishes were significant, which were closely related to the variations of food resources in the area. The proportion of phytoplankton ingested by H. molitrix and A. nobilis in Gusheng was greater than those in northern Erhai, which resulted from the different food compositions in these two regions. The Schoener overlap index revealed no sig-nificant dietary overlap between the two fish species and N. taihuensis （E〈0.6）.
同期刊论文项目
同项目期刊论文
Nitrogen and phosphorus mineralization in sediments of Taihu Lake after the removal of light fractio
Potentially mineralizable nitrogen in sediments of the shallow lakes in the middle and lower reaches
Characteristics of organic nitrogen fractions in sediments of the shallow lakes in the middle and lo
Inorganic nitrogen release kinetics and exchangeable inorganicnitrogen of the sediments from shallow
Historical accumulation of N and P and sourcesof organic matter and N in sediment in an agricultural
Temporal and spatial changes of water quality and management strategies of Dianchi Lake in southwest
Composition, source characteristic and indication of eutrophication of dissolved organic matter in t
Water pollution characteristics of Dianchi Lake and the course of protection and pollution managemen
Spatial and temporal distributions of microorganisms and their role in the evolution of Erhai Lake e
Historical accumulation and environmental risk of nitrogen and phosphorus in sediments of Erhai Lake
Characteristics of Phosphorus Species Identified by 31P NMR in Different Trophic Lake Sediments from
Composition and Spectroscopic Characteristics of Dissolved Organic Matter Extracted from the Sedimen
Physiological response of a submerged plant (Myriophyllum spicatum) to different NH4Cl concentration
Organic matter compositions and DOM release from the sediments of the shallow lakes in the middle an
Effects of Organic Matter and Submerged Macrophytes on Variations of Alkaline Phosphatase Activity a
Characteristicsof Phosphorus Species Identified by 31P NMR in Different TrophicLake Sediments from t
Physiological Response of a Submerged Plant (Myriophyllum Spicatum)to Different NH4Cl Concentrations
期刊信息
位置：