{"title":"Effect of different salinities on growth and stress physiology in juvenile lumpfish","authors":"Thor M. Jonassen, Albert K. D. Imsland","doi":"10.1007/s10499-025-02030-8","DOIUrl":null,"url":null,"abstract":"<div><p>Primary stress response, osmoregulation, and growth were investigated in juvenile lumpfish (mean initial weight (g, ± SEM) was 27.1 ± 1.1—28.0 ± 1.3) reared at three different salinities (15, 20, and 36 ppt) for 28 days. Thermal growth coefficient (TGC) was between 4.0 ± 0.12 (15 ppt) and 4.2 ± 0.06 (36 ppt) and did not vary significantly between the three salinity groups. Plasma ions concentrations (Na<sup>+</sup>, K<sup>+</sup>, Cl<sup>−</sup>, and Ca<sup>2+</sup>) were unaffected by salinity and did not provide evidence of osmotic stress in the tested range. Plasma cortisol levels were similar at the beginning and end of the experiments and were similar to, or significantly lower, than values previously reported on undisturbed lumpfish. Overall, present findings indicate that juvenile lumpfish tolerate well low salinity within the tested range which encompasses conditions encountered in rearing sites where lumpfish are used to control parasites in salmon aquaculture.</p></div>","PeriodicalId":8122,"journal":{"name":"Aquaculture International","volume":"33 5","pages":""},"PeriodicalIF":2.2000,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10499-025-02030-8.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Aquaculture International","FirstCategoryId":"97","ListUrlMain":"https://link.springer.com/article/10.1007/s10499-025-02030-8","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"FISHERIES","Score":null,"Total":0}
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Abstract
Primary stress response, osmoregulation, and growth were investigated in juvenile lumpfish (mean initial weight (g, ± SEM) was 27.1 ± 1.1—28.0 ± 1.3) reared at three different salinities (15, 20, and 36 ppt) for 28 days. Thermal growth coefficient (TGC) was between 4.0 ± 0.12 (15 ppt) and 4.2 ± 0.06 (36 ppt) and did not vary significantly between the three salinity groups. Plasma ions concentrations (Na+, K+, Cl−, and Ca2+) were unaffected by salinity and did not provide evidence of osmotic stress in the tested range. Plasma cortisol levels were similar at the beginning and end of the experiments and were similar to, or significantly lower, than values previously reported on undisturbed lumpfish. Overall, present findings indicate that juvenile lumpfish tolerate well low salinity within the tested range which encompasses conditions encountered in rearing sites where lumpfish are used to control parasites in salmon aquaculture.
期刊介绍：
Aquaculture International is an international journal publishing original research papers, short communications, technical notes and review papers on all aspects of aquaculture.
The Journal covers topics such as the biology, physiology, pathology and genetics of cultured fish, crustaceans, molluscs and plants, especially new species; water quality of supply systems, fluctuations in water quality within farms and the environmental impacts of aquacultural operations; nutrition, feeding and stocking practices, especially as they affect the health and growth rates of cultured species; sustainable production techniques; bioengineering studies on the design and management of offshore and land-based systems; the improvement of quality and marketing of farmed products; sociological and societal impacts of aquaculture, and more.
This is the official Journal of the European Aquaculture Society.
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