The Impact of Different Hatchery Rearing Environments on Smolt-to-Adult Survival of Spring Chinook Salmon
| Autor: | Dina K. Spangenberg, Ryan Gerstenberger, Donald A. Larsen, Brian R. Beckman, Chris Brun, Deborah L. Harstad |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Chinook wind biology 010604 marine biology & hydrobiology fungi 04 agricultural and veterinary sciences Aquatic Science biology.organism_classification 01 natural sciences Hatchery body regions Fishery 040102 fisheries 0401 agriculture forestry and fisheries Oncorhynchus skin and connective tissue diseases Ecology Evolution Behavior and Systematics |
| Zdroj: | Transactions of the American Fisheries Society. 146:539-555 |
| ISSN: | 1548-8659 0002-8487 |
| Popis: | The aim of this study was to assess the effect of differing hatchery rearing environments on smolting, early male maturation, and smolt-to-adult return rates (SARs) in Chinook Salmon Oncorhynchus tshawytscha. In this investigation, SARs were compared for spring Chinook Salmon from Hood River stock reared at three different hatcheries and then released into the Hood River, replicated over three separate years (2010–2012). Differences in SARs were found both between rearing groups and release years. Smolts reared at Pelton Ladder had consistently higher SARs than those reared at either Parkdale or Carson hatcheries. Smolt length at release was positively correlated to SARs across years and rearing groups. In addition, multiple regression models suggested that attributes related to smolt quality were positively related to SARs while the minijack rate was negatively related to SAR. Migration of smolts downstream after release was also assessed. Larger smolts were faster downstream migrants and migrati... |
| Databáze: | OpenAIRE |
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