期刊
JOURNAL OF FISH BIOLOGY
卷 64, 期 4, 页码 1027-1038出版社
WILEY
DOI: 10.1111/j.1095-8649.2004.0368.x
关键词
blood sampling; feeding rate; Lepeophtheirus salmonis; Oncorhynchus mykiss; swimming performance
The effect of two known rates of repeated blood loss on rainbow trout Oncorhynchus mykiss swimming performance was measured and blood-feeding rates of sea lice Lepeophtheirus salmonis were calculated to predict the point at which blood ingestion causes anaemia in infected fish. Known quantities of blood were sampled from rainbow trout over a 5 day period followed by critical swimming performance (U-crit) testing. A predictive equation was developed using masses of blood-feeding sea lice and host blood loss calculated for increasing levels of sea lice infection. Blood loss of 8% total blood volume caused a decrease in Ucrit for rainbow trout. Total blood volume losses of 3.2% reduced erythrocyte stores, but did not affect fish swimming performance. The predictive feeding rate model suggests that 15-25% of the tissue consumed by sea lice is blood. This consumption of blood at higher sub-lethal infection levels (greater than or equal to0.5 sea lice g(-1)) may cause anaemia and a further decrease in swimming performance. Anaemia would compound the osmotic balance problems due to infection and potentially precipitate the morbidity seen at lethal sea lice levels (0.75-1.0 lice g(-1)). (C) 2004 The Fisheries Society of the British Isles.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据