Journal article
Assessing the Suitability of a Partial Water Reuse System for Rearing Juvenile Chinook Salmon for Stocking in Washington State
Journal of aquatic animal health, Vol.23(2), pp.55-61
06/2011
Handle:
https://hdl.handle.net/2376/104664
PMID: 21834328
Abstract
To assess the suitability of water reuse technology for raising Pacific salmon Oncorhynchus spp. for stocking purposes, fish health and welfare were compared between two groups of juvenile Chinook salmon O. tshawytscha from the same spawn: one group was reared in a pilot partial water reuse system (circular tanks), and the other group was reared in a flow‐through raceway. This observational study was carried out over a 21‐week period in Washington State. Reuse and raceway fish were sampled repeatedly for pathogen screening and histopathology; fin erosion and whole‐blood characteristics were also evaluated. By the study's end, no listed pathogens were isolated from either cohort, and survival was 99.3% and 99.0% in the reuse and raceway groups, respectively. Condition factor was 1.28 in raceway fish and 1.14 in reuse fish; this difference may have been attributable to occasional differences in feeding rates between the cohorts. Fin indices (i.e., length of the longest dorsal or caudal fin ray, standardized by fork length) were lower in reuse fish than in raceway fish, but fin erosion was not grossly apparent in either cohort. The most consistent histological lesion was gill epithelial hypertrophy in reuse fish; however, blood analyses did not suggest any corresponding physiological imbalances. Overall, results suggest that water reuse technology can be employed in rearing juvenile anadromous salmonids for stocking purposes.
Received December 3, 2009; accepted February 14, 2011
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Details
- Title
- Assessing the Suitability of a Partial Water Reuse System for Rearing Juvenile Chinook Salmon for Stocking in Washington State
- Creators
- Christopher Good - The Conservation Fund's Freshwater InstituteBrian Vinci - The Conservation Fund's Freshwater InstituteSteven Summerfelt - The Conservation Fund's Freshwater InstituteKevin Snekvik - Washington State UniversityIan Adams - Chelan County Public Utility DistrictSamuel Dilly - Chelan County Public Utility District
- Publication Details
- Journal of aquatic animal health, Vol.23(2), pp.55-61
- Academic Unit
- Veterinary Microbiology and Pathology, Department of
- Publisher
- Taylor & Francis Group
- Number of pages
- 7
- Identifiers
- 99900546685401842
- Language
- English
- Resource Type
- Journal article