背角无齿蚌对浮游藻类的滤食选择性与滤水率研究

被引:36
作者
吴庆龙
陈宇炜
刘正文
机构
[1] 中国科学院南京地理与湖泊研究所
[2] 中国科学院南京地理与湖泊研究所 南京
关键词
背角无齿蚌; 滤水率; 滤食选择性; 浮游藻类;
D O I
10.13287/j.1001-9332.2005.0364
中图分类号
X52 [水体污染及其防治];
学科分类号
0815 ;
摘要
以滇池及其附近水体中分布的背角无齿蚌为研究对象,分析其滤水速率及相关的影响因素,研究其食物组成和滤食浮游藻类的选择性,并初步估算其自然种群的滤水能力和控制浮游藻类的潜力.结果表明,背角无齿蚌的滤水率有一定的日变化,傍晚时较高;滤水率与水体中的悬浮物质含量密切相关,随着悬浮物质浓度增加而减少;滤水率与蚌的个体大小有关,体重增加,滤水率下降.对比水体中与蚌消化道内浮游藻类所占的百分比,发现其对浮游藻类的滤食没有显著的选择性.自然水体中背角无齿蚌的滤水能力很低.
引用
收藏
页码:2423 / 2427
页数:5
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