The influence of temperature on performance, biological indices, composition, and nutrient retention of juvenile Chinook salmon (Oncorhynchus tshawytscha) reared in freshwater

被引:7
作者
Araujo, Bruno C. [1 ,2 ]
Miller, Matthew R. [1 ]
Walker, Seumas P. [1 ]
Symonds, Jane E. [1 ]
机构
[1] Cawthron Inst, Nelson 7010, New Zealand
[2] Cawthron Inst, 98 Halifax St East, Nelson 7010, New Zealand
来源
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY | 2023年 / 280卷
关键词
King salmon; Feed intake; Lipid; Fatty acids; DHA; Amino acids; FOOD CONVERSION EFFICIENCY; GASTRIC EVACUATION RATE; FATTY-ACID-COMPOSITION; COD GADUS-MORHUA; ATLANTIC SALMON; SALAR L; RAINBOW-TROUT; FEED-INTAKE; LIPID DIGESTIBILITY; OXYGEN-CONSUMPTION;
D O I
10.1016/j.cbpa.2023.111412
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
This study investigated the effects of different temperatures on the performance, composition, and nutrient retention of Chinook salmon reared in freshwater. Individuals (187.6 & PLUSMN; 27.1 g) were distributed into twelve tanks of 8000 L each (155 to 157 fish per tank) at a temperature of 14 & DEG;C. The tanks were transitioned from 14 & DEG;C (hatchery temperature) to 8, 12, 16, and 20 & DEG;C over seven days. Three fish assessments were performed, the first (initial) when the fish were distributed in the tanks, a second (interim) between days 9 and 16 at the start of the experiment, and a third (final) after 41 to 49 days at the target temperature. At the end of the trial, performance parameters, proximate composition, amino acid, and fatty acid composition, and nutrient retention were evaluated. Better growth performance was observed in fish at 16 & DEG;C and 20 & DEG;C compared to the lower temperatures. Fish at higher temperatures had higher levels of saturated fatty acids (SFA), while at lower temperatures fish had higher levels of n-3 and n-6 polyunsaturated fatty acids (PUFA), especially eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA). A polynomial relationship between nutrient retention and temperature showed that fish from all treatments retained more lipids than proteins, with higher retention of MUFA compared to the other fatty acid classes. Additionally, DHA retention was approximately three times higher than EPA retention. The results showed that 16 to 20 & DEG;C was the optimum temperature range for Chinook salmon, and the performance differences were mainly modulated by lipid retention/catabolism.
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页数:12
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