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The impact of temperature on the metabolome and endocrine metabolic signals in Atlantic salmon (Salmo salar)

Författare och institution:
Andreas Kullgren (Institutionen för biologi och miljövetenskap); Fredrik Jutfelt (Institutionen för biologi och miljövetenskap); Ramon Fontanillas (-); Kristina Sundell (Institutionen för biologi och miljövetenskap); Linda Samuelsson (Institutionen för neurovetenskap och fysiologi, sektionen för fysiologi); Kerstin Wiklander (Institutionen för matematiska vetenskaper, matematisk statistik, Chalmers/GU); Peter Kling (Institutionen för biologi och miljövetenskap); Wolfgang Koppe (-); D. G. Joakim Larsson (Institutionen för neurovetenskap och fysiologi, sektionen för fysiologi); Björn Thrandur Björnsson (Institutionen för biologi och miljövetenskap); Elisabeth Jönsson (Institutionen för biologi och miljövetenskap)
Publicerad i:
Comparative Biochemistry and Physiology A, 164 ( 1 ) s. 44-53
ISSN:
1095-6433
Publikationstyp:
Artikel, refereegranskad vetenskaplig
Publiceringsår:
2013
Språk:
engelska
Fulltextlänk:
Sammanfattning (abstract):
The aim was to elucidate the effects of elevated temperature on growth performance, growth- and appetite-regulating hormones and metabolism in Atlantic salmon, Salmo salar. Post-smolts in seawater (average mass 175 g) that had been reared at 12 °C were kept at three temperatures (8, 12 and 18 °C) and sampled after one and three months. After three months, the fish kept in 18 °C had decreased growth rate and condition factor, and elevated plasma levels of growth hormone (GH) and leptin, compared with fish kept at the lower temperatures. Food conversion efficiency was also decreased at 18 °C, while at the same time protein uptake was improved and thus was not a limiting mechanism for growth. Redistribution of energy stores in fish at the highest temperature is evident as a preference of maintaining length growth during times of limited energy availability. NMR-based metabolomics analyses of plasma revealed that several metabolites involved in energy metabolism were negatively affected by temperature in the upper temperature range of Atlantic salmon. Specifically, the high temperature induced a decline of several amino acids (glutamine, tyrosine and phenylalanine) and a shift in lipid metabolism. It appears likely that the decreased food intake at the highest temperature is linked to an anorexigenic function of leptin, but also that the decreased food intake, feed conversion efficiency and condition factor can be linked to changes in GH endocrinology.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
NATURVETENSKAP ->
Biologiska vetenskaper
NATURVETENSKAP ->
Biologiska vetenskaper ->
Zoologi
NATURVETENSKAP ->
Biologiska vetenskaper ->
Zoologi ->
Zoofysiologi
Nyckelord:
Fish condition factor endocrinology growth NMR metabolomics metabolism temperature
Postens nummer:
171396
Posten skapad:
2013-01-18 10:02
Posten ändrad:
2016-06-28 15:30

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