【摘 要】
：
淡水蚌类是淡水生物群落的重要组成部分.鄱阳湖区生境复杂，淡水蚌类物种繁多、资源丰富.本文分不同湖区对淡水蚌类进行系统的定量采集和调查.结果表明：鄱阳湖淡水蚌类有13属42种，中国特有种有32种；优势种为圆顶珠蚌和洞穴丽蚌，它们在各采样湖区都有分布.每个采样湖区标本所含属数、种数和相对丰度相差较大；各属所含种数和相对丰度差异较大；各采样湖区、各属之间生物量和密度存在较大差异.全湖淡水蚌类密度和生物量
【机 构】
：
江西农业大学动物科技学院 南昌330045
论文部分内容阅读
淡水蚌类是淡水生物群落的重要组成部分.鄱阳湖区生境复杂，淡水蚌类物种繁多、资源丰富.本文分不同湖区对淡水蚌类进行系统的定量采集和调查.结果表明：鄱阳湖淡水蚌类有13属42种，中国特有种有32种；优势种为圆顶珠蚌和洞穴丽蚌，它们在各采样湖区都有分布.每个采样湖区标本所含属数、种数和相对丰度相差较大；各属所含种数和相对丰度差异较大；各采样湖区、各属之间生物量和密度存在较大差异.全湖淡水蚌类密度和生物量分别为(0.28-±-0.22)ind/m2和(4.08±3.96)g/m2.在种群结构方面，舟形无齿蚌、褶纹冠蚌、背瘤丽蚌、鱼尾楔蚌、猪耳丽蚌、扭蚌、中国尖嵴蚌、真柱矛蚌、洞穴丽蚌、背角无齿蚌、圆背角无齿蚌、刻裂丽蚌、绢丝丽蚌和圆头楔蚌属于增长型；短褶矛蚌、射线裂脊蚌、蚶形无齿蚌和圆顶珠蚌属于稳定型；多瘤丽蚌、椭圆背角无齿蚌、球形无齿蚌和棘裂脊蚌属于衰退型.
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