Physiological Assessment and Behavioral Interaction of Wild and Hatchery Juvenile Salmonids : The Relationship of Fish Size and Growth to Smoltification in Spring Chinook Salmon.

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Description

Experiments were performed to determine the relative influence of size and growth rate on downstream migratory disposition and physiology in yearling spring chinook salmon (Oncorhynchus tshawtscha) smolts. A group of juvenile chinook salmon was size graded into small and large categories with half the fish in each group reared at an elevated temperature, resulting in four distinct treatment groups: Large Warm (LW), Large Cool (LC), Small Warm (SW), and Small Cool (SC). Fish from warm-water treatment groups displayed significantly higher growth rates than cool-water groups. Fish were tagged and released into a natural creek where downstream movement was monitored. For ... continued below

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56 pages

Creation Information

Beckman, Brian R.; Larsen, Donald A.; Lee-Pawlak, Beeda & Dickhoff, Walton W. October 1, 1996.

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Description

Experiments were performed to determine the relative influence of size and growth rate on downstream migratory disposition and physiology in yearling spring chinook salmon (Oncorhynchus tshawtscha) smolts. A group of juvenile chinook salmon was size graded into small and large categories with half the fish in each group reared at an elevated temperature, resulting in four distinct treatment groups: Large Warm (LW), Large Cool (LC), Small Warm (SW), and Small Cool (SC). Fish from warm-water treatment groups displayed significantly higher growth rates than cool-water groups. Fish were tagged and released into a natural creek where downstream movement was monitored. For each of the two releases, fish that migrated past a weir within the first 5 days postrelease had significantly higher spring growth rates than fish that did not migrate within that period. Significant differences in length for the same fish were only found in the second release. Also for the second release, fish from the warm water treatment groups were recovered in higher proportions than fish from cool water groups. The results indicate that increased growth rate in the spring has a positive relation to downstream migratory disposition. Furthermore, there is a relation between smolt size and migration; however, this relation is weaker than that found between growth rate and migration.

Physical Description

56 pages

Notes

OSTI as DE97003155

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  • Other Information: PBD: Oct 1996

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  • Other: DE97003155
  • Report No.: DOE/BP-64915-1
  • Grant Number: AI79-93BP64915
  • DOI: 10.2172/446327 | External Link
  • Office of Scientific & Technical Information Report Number: 446327
  • Archival Resource Key: ark:/67531/metadc677190

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  • October 1, 1996

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  • July 25, 2015, 2:21 a.m.

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Beckman, Brian R.; Larsen, Donald A.; Lee-Pawlak, Beeda & Dickhoff, Walton W. Physiological Assessment and Behavioral Interaction of Wild and Hatchery Juvenile Salmonids : The Relationship of Fish Size and Growth to Smoltification in Spring Chinook Salmon., report, October 1, 1996; United States. (digital.library.unt.edu/ark:/67531/metadc677190/: accessed August 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.