Exercise and Structure Improve Juvenile Chinook Salmon Rearing Performance  

作　　者：Jill M. Voorhees Nathan Huysman Eric Krebs Michael E. Barnes 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)

机构地区：[1]South Dakota Department of Game, Fish and Parks, McNenny State Fish Hatchery, Spearfish, SD, USA

出　　处：《Open Journal of Marine Science》2021年第2期80-91,共12页海洋科学期刊（英文）

摘　　要：This experiment evaluated the use of an exercise routine and vertically-sus<span style="font-family:Verdana;">-</span><span style="font-family:;" "=""><span style="font-family:Verdana;">pended structure during juvenile landlocked fall Chinook salmon (</span><i><span style="font-family:Verdana;">Oncor</span></i></span><i><span style="font-family:Verdana;">hynchus tshawytscha</span></i><span style="font-family:Verdana;">;</span><i><span style="font-family:;" "=""> </span></i><span style="font-family:Verdana;">mean ± SE, initial weight 1.47 ± 0.03 g, total length 56.4 ± 0.4 mm) rearing. Four treatments were used: 1</span><span style="font-family:Verdana;">)</span><span style="font-family:Verdana;"> no exercise routine nor vertically-suspended structure, 2</span><span style="font-family:Verdana;">)</span><span style="font-family:Verdana;"> exercise and structure, 3</span><span style="font-family:Verdana;">)</span><span style="font-family:Verdana;"> exercise and no structure, and 4</span><span style="font-family:Verdana;">)</span><span style="font-family:;" "=""><span style="font-family:Verdana;"> no exercise and structure. </span><span style="font-family:Verdana;">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. </span><span style="font-family:Verdana;">Gain and percent gain were also significantly greater in the tanks receiving</span><span style="font-family:Verdana;"> structure without exercise compared to tanks with exercise and no structure or tanks with neither exercise nor structure. Feed conversion ratio was signif</span><span style="font-family:Verdana;">icantly improved in the salmon tanks with structure and without exercise</span><spaThis experiment evaluated the use of an exercise routine and vertically-sus<span style="font-family:Verdana;">-</span><span style="font-family:;" "=""><span style="font-family:Verdana;">pended structure during juvenile landlocked fall Chinook salmon (</span><i><span style="font-family:Verdana;">Oncor</span></i></span><i><span style="font-family:Verdana;">hynchus tshawytscha</span></i><span style="font-family:Verdana;">;</span><i><span style="font-family:;" "=""> </span></i><span style="font-family:Verdana;">mean ± SE, initial weight 1.47 ± 0.03 g, total length 56.4 ± 0.4 mm) rearing. Four treatments were used: 1</span><span style="font-family:Verdana;">)</span><span style="font-family:Verdana;"> no exercise routine nor vertically-suspended structure, 2</span><span style="font-family:Verdana;">)</span><span style="font-family:Verdana;"> exercise and structure, 3</span><span style="font-family:Verdana;">)</span><span style="font-family:Verdana;"> exercise and no structure, and 4</span><span style="font-family:Verdana;">)</span><span style="font-family:;" "=""><span style="font-family:Verdana;"> no exercise and structure. </span><span style="font-family:Verdana;">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. </span><span style="font-family:Verdana;">Gain and percent gain were also significantly greater in the tanks receiving</span><span style="font-family:Verdana;"> structure without exercise compared to tanks with exercise and no structure or tanks with neither exercise nor structure. Feed conversion ratio was signif</span><span style="font-family:Verdana;">icantly improved in the salmon tanks with structure and without exercise</span><spa

关 键 词：Environmental Enrichment SALMONID Oncorhynchus tshawytscha Vertically-Suspended 

分 类 号：O17[理学—数学]