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  • Hjelmstedt, P.Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för husdjurens miljö och hälsa (HMH),Department of Animal Environment and Health (författare)

Continuous physiological welfare evaluation of European whitefish (Coregonus lavaretus) during common aquaculture practices leading up to slaughter

  • Artikel/kapitelEngelska2021

Förlag, utgivningsår, omfång ...

  • Elsevier BV,2021

Nummerbeteckningar

  • LIBRIS-ID:oai:gup.ub.gu.se/302530
  • https://gup.ub.gu.se/publication/302530URI
  • https://doi.org/10.1016/j.aquaculture.2020.736258DOI
  • https://res.slu.se/id/publ/110933URI

Kompletterande språkuppgifter

  • Språk:engelska

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Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • European whitefish (Coregonus lavaretus) is an aquaculture species with the potential for expanded cultivation in the fresh and brackish waters of Northern Europe. Yet, relatively little species-specific information is available regarding the stress responses and associated welfare implications for this species in captivity. We addressed this knowledge gap by using a combination of implantable heart rate bio-loggers and a range of traditional stress indicators (e.g. haematological parameters and plasma concentrations of cortisol, glucose and ions) to comprehensively evaluate the physiological responses of freely swimming whitefish in captivity, as well as when subjected to aquaculture practices and stressors that commonly occur prior to and during slaughter. Whitefish appeared to recover rapidly from surgery, as resting heart rate decreased within 36 h to stabilize at similar to 25 beats min(-1) for the next 18 days when fish were left relatively undisturbed (i.e. personnel were only present when feeding fish). In contrast with previous studies on farmed rainbow trout and Atlantic salmon, whitefish did not exhibit a clear circadian heart rate rhythm, which may be related to species-specific differences in diurnal locomotor activity. Whitefish also appear to have a well-developed capacity for thermal acclimation of heart rate, as daily resting heart rate did not change during the undisturbed period despite an increase in body temperature from similar to 6.8 to 11.2 degrees C. Following acute stressors such as crowding and transportation, the physiological response of whitefish typically involved transient elevations in heart rate, plasma cortisol and glucose, and red blood cell swelling, while plasma [K+] decreased. In contrast, the heart rate of whitefish plummeted following the combination of brailing (i.e. to haul in fish with a brail/net) and CO2 exposure prior to slaughter, while plasma cortisol, glucose and [Ca2+] significantly increased. An unforeseen finding concerns the substantial and long-lasting physiological stress response observed in whitefish when held in close proximity (i.e. within similar to 10 m) to a rainbow trout net pen, as the mean heart rate of whitefish increased from similar to 32 to 43 beats min(-1) (i.e. an increase of similar to 34%). This may represent an innate physiological response to the threat of predation, which consequently increases the allostatic load and energetic expenditure of whitefish when farmed alongside salmonids. To conclude, this study highlights the importance of performing long-term, species-specific evaluations of freely swimming fish in real aquaculture settings, and provides a platform for further research aiming to determine the welfare implications of simultaneously farming predatory and prey species in close proximity.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Brijs, J.Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för husdjurens miljö och hälsa (HMH),Department of Animal Environment and Health (författare)
  • Berg, C. (författare)
  • Axelsson, Michael,1958Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences(Swepub:gu)xaxemi (författare)
  • Sandblom, Erik,1978Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences(Swepub:gu)xsaner (författare)
  • Roques, Jonathan,1985Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,SWEMARC,Department of Biological and Environmental Sciences(Swepub:gu)xroqjo (författare)
  • Sundh, Henrik,1976Gothenburg University,Göteborgs universitet,SWEMARC,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences(Swepub:gu)xsunhe (författare)
  • Sundell, Kristina,1959Gothenburg University,Göteborgs universitet,SWEMARC,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences(Swepub:gu)xskris (författare)
  • Kiessling, AndersSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för husdjurens utfodring och vård (HUV),Department of Animal Nutrition and Management(Swepub:slu)48115 (författare)
  • Gräns, AlbinSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för husdjurens miljö och hälsa (HMH),Department of Animal Environment and Health(Swepub:slu)102715 (författare)
  • Berg, LottaSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för husdjurens miljö och hälsa (HMH),Department of Animal Environment and Health(Swepub:slu)50737 (författare)
  • Sveriges lantbruksuniversitetInstitutionen för husdjurens miljö och hälsa (HMH) (creator_code:org_t)
  • Sveriges lantbruksuniversitet

Sammanhörande titlar

  • Ingår i:Aquaculture: Elsevier BV5340044-84861873-5622

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