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DOI | 10.1016/j.aquaculture.2019.02.025 |
Impact of temperature and growth hormone on growth physiology of juvenile Atlantic wolffish (Anarhichas lupus) | |
Arnason, Tomas1; Gunnarsson, Asgeir2; Steinarsson, Agnar1; Danielsdottir, Anna Kristin3; Bjornsson, Bjorn Thrandur4,5 | |
发表日期 | 2019 |
ISSN | 0044-8486 |
EISSN | 1873-5622 |
卷号 | 504页码:404-413 |
英文摘要 | The effects of temperature and growth hormone (GH) implantation on growth of juvenile Atlantic wolffish (Anarhichas lupus) were investigated. The year-long study had three sequential experimental phases (EP) termed EP1, EP2 and EP3, lasting for 6, 9 and 37 weeks, respectively. The experimental fish were divided into four groups and reared at different target temperatures (3, 7, 11 and 15 degrees C) during EP1 and EP2, but at a constant temperature of 7 degrees C during EP3. At the beginning of EP2, half of the fish from each group was implanted with formulation of recombinant bovine GH (Posilac (R)), while the other half was sham-implanted with vehicle. The optimal temperature for growth (T-opt.G) of early juveniles (geometric mean weight 7.5 g) was determined as 12.1 degrees C during EP1, while the upper critical temperature (Tc) was concluded to be very close to 15 degrees C, as fish at that temperature had stunted growth, increased mortality and showed external signs of skeletal deformities. Thus, the species was found to be relatively stenothermic during the early juvenile stages and therefore vulnerable to relatively modest increases in environmental temperature above T-opt.G At 15 degrees C, GH implantation had no effects on growth rate. This indicates that the high allostatic load at this temperature leaves no scope for increased growth. In contrast, at lower rearing temperatures, the GH implantation had substantial, long-term effects on growth rate and induced remarkably similar relative growth stimulation at 3, 7 and 11 degrees C, suggesting a temperature-independent mechanism for the growth-promoting effects of GH. |
WOS研究方向 | Fisheries ; Marine & Freshwater Biology |
来源期刊 | AQUACULTURE
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/96523 |
作者单位 | 1.Marine & Freshwater Res Inst, Box 42, IS-240 Grindavik, Iceland; 2.Marine & Freshwater Res Inst, Skulagata 4, IS-121 Reykjavik, Iceland; 3.Matis Ohf, Vinlandsleid 12, IS-113 Reykjavik, Iceland; 4.Univ Gothenburg, Dept Biol & Environm Sci, Box 463, SE-40530 Gothenburg, Sweden; 5.Univ Gothenburg, Swedish Mariculture Res Ctr SWEMARC, Box 463, SE-40530 Gothenburg, Sweden |
推荐引用方式 GB/T 7714 | Arnason, Tomas,Gunnarsson, Asgeir,Steinarsson, Agnar,et al. Impact of temperature and growth hormone on growth physiology of juvenile Atlantic wolffish (Anarhichas lupus)[J],2019,504:404-413. |
APA | Arnason, Tomas,Gunnarsson, Asgeir,Steinarsson, Agnar,Danielsdottir, Anna Kristin,&Bjornsson, Bjorn Thrandur.(2019).Impact of temperature and growth hormone on growth physiology of juvenile Atlantic wolffish (Anarhichas lupus).AQUACULTURE,504,404-413. |
MLA | Arnason, Tomas,et al."Impact of temperature and growth hormone on growth physiology of juvenile Atlantic wolffish (Anarhichas lupus)".AQUACULTURE 504(2019):404-413. |
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