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Exercise and Structure Improve Juvenile Chinook Salmon Rearing Performance

Open Journal of Marine Science 2021年第2期11卷 80-91页

作者： Jill M. Voorhees Nathan Huysman Eric Krebs Michael E. Barnes South Dakota Department of Game Fish and Parks McNenny State Fish Hatchery Spearfish SD USA

This experiment evaluated the use of an exercise routine and vertically-sus-pended structure during juvenile landlocked fall Chinook salmon (oncorhynchus tshawytscha; mean ± SE, initial weight 1.47 ± 0.03 g, total l... 详细信息

This experiment evaluated the use of an exercise routine and vertically-sus-pended structure during juvenile landlocked fall Chinook salmon (Oncorhynchus tshawytscha; mean ± SE, initial weight 1.47 ± 0.03 g, total length 56.4 ± 0.4 mm) rearing. Four treatments were used: 1) no exercise routine nor vertically-suspended structure, 2) exercise and structure, 3) exercise and no structure, and 4) no exercise and structure. Water velocities in tanks without exercise were 12 cm/s, where-as the exercise routine consisted of seven days at 12 cm/s followed by seven days at 18 cm/s. The structure was an array consisting of four vertically-suspended aluminum angles. Total tank gain and percent gain were significantly greater after 50 days in the tanks of salmon subjected to the exercise routine and structure compared to the three other treatments. Gain and percent gain were also significantly greater in the tanks receiving structure without exercise compared to tanks with exercise and no structure or tanks with neither exercise nor structure. Feed conversion ratio was significantly improved in the salmon tanks w

关键词： Environmental Enrichment Salmonid oncorhynchus tshawytscha Vertically-Suspended

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