Tagging mortality experiments on Pacific mackerel, Pneumatophorus japonicus
Two experiments were conducted to compare tagging mortality rates when Pacific mackerel are tagged using a traditional method and a modified method. Tagged and control fish in equal numbers were held in tanks on board the R/V ALASKA and observed for mortality. The experiments revealed mortality rates of 24% when the tag passes between the pterygiophores or neural spines and 1.5% when the tag is placed in the lateral musculature. Mortality from handling the fish for tagging was 4%, tank trauma was 2%, and the initial tag loss was 2.5%. (20pp.)
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| Main Author: | |
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| Format: | monograph biblioteca |
| Language: | English |
| Published: |
California Department of Fish and Game
1977
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| Subjects: | Fisheries, Biology, Tagging, Pacific mackerel, Pneumatophorus japonicus, R/V Alaska, |
| Online Access: | http://hdl.handle.net/1834/18611 |
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