High risk no gain-metabolic performance of hatchery reared Atlantic salmon smolts, effects of nest emergence time, hypoxia avoidance behaviour and size

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Rosengren, Malin,1982Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences,Univ Gothenburg, Dept Biol & Environm Sci, POB 463, S-40531 Gothenburg, Sweden. (författare)

High risk no gain-metabolic performance of hatchery reared Atlantic salmon smolts, effects of nest emergence time, hypoxia avoidance behaviour and size

Artikel/kapitelEngelska2017

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Elsevier BV,2017

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LIBRIS-ID:oai:gup.ub.gu.se/254483
https://gup.ub.gu.se/publication/254483URI
https://doi.org/10.1016/j.physbeh.2017.03.028DOI
https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-324243URI

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Språk:engelska

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When animals are reared for conservational releases it is paramount to avoid reducing genetic and phenotypic variation over time. This requires an understanding of how diverging behavioural and physiological traits affect performance both in captivity and after release. In Atlantic salmon, emergence time from the spawning gravel has been linked to certain behavioural and physiological characteristics and to the concept of stress coping styles. Early emerging fry has for example been shown to be bolder and more aggressive and to have higher standard metabolic rates compared to late emerging fry. The first aim was therefore to examine if emergence latency affect the behavioural stress coping response also beyond the fry and parr stage. This was done using a hypoxia avoidance test, where an active behavioural avoidance response can be related to higher risk taking. No behavioural differences were found between the two emergence fractions either at the parr or pre-smolt stage, instead smaller individuals were more prone to express an "active" hypoxia avoidance response. Further, an individual expressing a "passive" response as parr were also more prone to express this behaviour at the pre-smolt stage. While there are some previous studies showing that early emerging individuals with a bolder personality may be favored within a hatchery setting it is not known to what extent these early differences persist to affect performance after release. The second aim was therefore to compare the physiological performance at the time of release as smolts using the two subgroups; 1) early emerging fish showing active hypoxia avoidance (Early + Bold) and 2) late emerging fish showing a passive hypoxia response (Late + Shy). The Early + Bold group showed a higher red blood cell swelling, suggesting a higher adrenergic output during stress, whereas there was no difference in post-stress plasma cortisol or physiological smolt status. While there was no difference in standard metabolic rate between the groups, the Early + Bold group exhibited a lower maximum metabolic rate and aerobic scope following strenuous swimming. In captivity this may have no clear negative effects, but in the wild, a more risk prone behavioural profile linked to a lower aerobic capacity to escape from e.g. a predator attack, could clearly be disadvantageous.

Ämnesord och genrebeteckningar

NATURVETENSKAP Geovetenskap och miljövetenskap hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences hsv//eng
NATURVETENSKAP Biologi hsv//swe
NATURAL SCIENCES Biological Sciences hsv//eng
MEDICIN OCH HÄLSOVETENSKAP Medicinska och farmaceutiska grundvetenskaper Fysiologi hsv//swe
MEDICAL AND HEALTH SCIENCES Basic Medicine Physiology hsv//eng
NATURVETENSKAP Biologi Etologi hsv//swe
NATURAL SCIENCES Biological Sciences Behavioural Sciences Biology hsv//eng
Boldness
Fish
Oxygen consumption
Physiology
Smolt migration
Supplementary rearing
stress-coping styles
trout oncorhynchus-mykiss
juvenile brown trout
european sea bass
rainbow-trout
oxygen-consumption
natural-selection
plasma-cortisol
coho salmon
trade-offs
cormick sd
1993
canadian journal of fisheries and aquatic sciences
v50
p656
Boldness

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

Thörnqvist, Per-OveUppsala universitet,Fysiologi,Beteendeneuroendokrinologi(Swepub:uu)perothor (författare)
Johnsson, Jörgen I,1959Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences,Univ Gothenburg, Dept Biol & Environm Sci, POB 463, S-40531 Gothenburg, Sweden.(Swepub:gu)xjohjo (författare)
Sandblom, Erik,1978Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences,Univ Gothenburg, Dept Biol & Environm Sci, POB 463, S-40531 Gothenburg, Sweden.(Swepub:gu)xsaner (författare)
Winberg, SvanteUppsala universitet,Fysiologi,Beteendeneuroendokrinologi(Swepub:uu)svanwinb (författare)
Sundell, Kristina,1959Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences,Univ Gothenburg, Dept Biol & Environm Sci, POB 463, S-40531 Gothenburg, Sweden.(Swepub:gu)xskris (författare)
Göteborgs universitetInstitutionen för biologi och miljövetenskap (creator_code:org_t)

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Ingår i:Physiology & Behavior: Elsevier BV175, s. 104-1120031-93841873-507X

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