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

Artikel i vetenskaplig tidskrift
Författare Andreas Kullgren
Fredrik Jutfelt
Ramon Fontanillas
Kristina Sundell
Linda Samuelsson
Kerstin Wiklander
Peter Kling
Wolfgang Koppe
D. G. Joakim Larsson
Björn Thrandur Björnsson
Elisabeth Jönsson
Publicerad i Comparative Biochemistry and Physiology A
Volym 164
Nummer/häfte 1
Sidor 44-53
ISSN 1095-6433
Publiceringsår 2013
Publicerad vid Institutionen för neurovetenskap och fysiologi, sektionen för fysiologi
Institutionen för matematiska vetenskaper, matematisk statistik
Institutionen för biologi och miljövetenskap
Sidor 44-53
Språk en
Länkar dx.doi.org/10.1016/j.cbpa.2012.10.0...
Ämnesord Fish condition factor endocrinology growth NMR metabolomics metabolism temperature
Ämneskategorier Biologiska vetenskaper, Zoologi, Zoofysiologi

Sammanfattning

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.

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