Chondrococcus columnaris Disease of Fishes: Influence of Columbia River Fish Ladders
| Autor: | M. P. Fujihara, F. P. Hungate |
|---|---|
| Rok vydání: | 1971 |
| Předmět: |
Ecological niche
Fish migration integumentary system Columnaris disease medicine.disease Population density Columnaris Fish ladder Fishery Antibody production Chondrococcus columnaris hemic and lymphatic diseases parasitic diseases medicine biological phenomena cell phenomena and immunity human activities |
| Zdroj: | Journal of the Fisheries Research Board of Canada. 28:533-536 |
| ISSN: | 0015-296X |
| DOI: | 10.1139/f71-075 |
| Popis: | Columbia River fish ladders were surveyed as a possible ecological niche for Chondrococcus columnaris, the causative agent for columnaris disease of fishes. Water samples from Bonneville, McNary, Priest Rapids, and Rocky Reach fish ladders during periods of warm-water temperature and high population density of fishes showed C. columnaris levels of from 0.06 to 4.1 organisms/ml. Samples taken upstream or downstream from the ladders were consistently negative. Average agglutinating titers and incidence of C. columnaris infection in largescale suckers were higher at the Bonneville ladder than at a site several miles downstream Coho salmon from an upper-river fish ladder (Rocky Reach) showed a higher incidence of infection and greater antibody production than at the downriver Bonneville ladder. It is concluded that fish-ladder facilities on the Columbia River are important sites for repetitive exposure of anadromous salmonids to C. columnaris. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|