Changes in Plasma Constituents During Spawning Migration of Pacific Salmons
Blood constituents were measured in salmon (Oncorhynchus gorbuscha and O. nerka) at various times during the spawning migration. Values for blood sodium, potassium, calcium, glucose, protein, and hematocrit suggested that during early stages of migration through post-spawning these fish experience a...
| Published in: | Journal of the Fisheries Research Board of Canada |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Canadian Science Publishing
1974
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1139/f74-002 http://www.nrcresearchpress.com/doi/pdf/10.1139/f74-002 |
| Summary: | Blood constituents were measured in salmon (Oncorhynchus gorbuscha and O. nerka) at various times during the spawning migration. Values for blood sodium, potassium, calcium, glucose, protein, and hematocrit suggested that during early stages of migration through post-spawning these fish experience a syndrome reminiscent of mammalian hypoadrenocorticism. The reverse was true of fish in advanced stages of senescence. Older fish also suffered ascorbate deficiency with a resultant necrosis of the skin. This deficiency was corrected by intraperitoneal injection of ascorbate. Various forms of hormone therapy applied to senescent fish were unsuccessful in prolonging their life appreciably. |
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