THE EFFECTS OF HETEROSIGMA-AKASHIWO ON JUVENILE ONCORHYNCHUS-TSHAWYTSCHA AND ITS IMPLICATIONS FOR FISH CULTURE

被引:59
作者
BLACK, EA
WHYTE, JNC
BAGSHAW, JW
GINTHER, NG
机构
[1] Government of British Columbia, Agriculture and Commercial, Fisheries Branch, Ministry of Agriculture and Fisheries, Victoria, British Columbia
[2] Department of Fisheries and Oceans, Biological Sciences Branch, Pacific Biological Station, Nanaimo, British Columbia
来源
JOURNAL OF APPLIED ICHTHYOLOGY-ZEITSCHRIFT FUR ANGEWANDTE ICHTHYOLOGIE | 1991年 / 7卷 / 03期
关键词
D O I
10.1111/j.1439-0426.1991.tb00523.x
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
The effects of natural blooms of Heterosigma akashiwo on freshwater- and saltwater-acclimated juvenile chinook salmon were assessed. Rates of fish mortality in the blooms were independent of acclimation of fish to seawater and the ambient oxygen levels, but were dependent on concentration of algae and ambient water temperatures. No pathological abnormality to gills or other internal organs in the fish were evident. Aeration or oxygenation of fish cages did not enhance or inhibit fish survival in a H. akashiwo bloom. Cause of death was considered to be due to a labile ichthyotoxic agent.
引用
收藏
页码:168 / 175
页数:8
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