A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Stock-specific variation of trophic position, diet and environmental stress markers in Atlantic salmon Salmo salar during feeding migrations in the Baltic Sea
Tekijät: Vuori K, Kiljunen M, Kanerva M, Koljonen ML, Nikinmaa M
Kustantaja: WILEY-BLACKWELL
Julkaisuvuosi: 2012
Journal: Journal of Fish Biology
Tietokannassa oleva lehden nimi: JOURNAL OF FISH BIOLOGY
Lehden akronyymi: J FISH BIOL
Numero sarjassa: 6
Vuosikerta: 81
Numero: 6
Aloitussivu: 1815
Lopetussivu: 1833
Sivujen määrä: 19
ISSN: 0022-1112
DOI: https://doi.org/10.1111/j.1095-8649.2012.03386.x
Tiivistelmä
This study investigated stock-specific variation in selected ecophysiological variables during the feeding migrations of Atlantic salmon Salmo salar in the Baltic Sea. Oxidative stress biomarkers and EROD (ethoxyresorufin-O-deethylase, Cyp1A enzyme) activity were used as indicators of possible environmental stress and stable isotopes as determinants of diet and trophic position. Latvian S. salar stocks Daugava and Gauja had distinct stable-isotope signatures compared to the other stocks, indicating differences in migration patterns, residency or arrival times, or dietary specialization among stocks. Salmo salar originating from Daugava and Gauja also had lower catalase enzyme activity than the other stocks. Post-smolts originating from rivers of the Gulf of Finland had elevated EROD activities compared to fish of the same age from Bothnian Bay rivers, which could indicate exposure to organochlorine pollutants. No other stock-specific differences in oxidative stress biomarkers were found. The study demonstrates how genetic, oxidative stress biomarker, EROD and stable-isotope data may be combined to study trophic position, prey prevalence and environmental stress of mixed S. salar stocks foraging in the sea. (C) 2012 The Authors Journal of Fish Biology (C) 2012 The Fisheries Society of the British Isles
This study investigated stock-specific variation in selected ecophysiological variables during the feeding migrations of Atlantic salmon Salmo salar in the Baltic Sea. Oxidative stress biomarkers and EROD (ethoxyresorufin-O-deethylase, Cyp1A enzyme) activity were used as indicators of possible environmental stress and stable isotopes as determinants of diet and trophic position. Latvian S. salar stocks Daugava and Gauja had distinct stable-isotope signatures compared to the other stocks, indicating differences in migration patterns, residency or arrival times, or dietary specialization among stocks. Salmo salar originating from Daugava and Gauja also had lower catalase enzyme activity than the other stocks. Post-smolts originating from rivers of the Gulf of Finland had elevated EROD activities compared to fish of the same age from Bothnian Bay rivers, which could indicate exposure to organochlorine pollutants. No other stock-specific differences in oxidative stress biomarkers were found. The study demonstrates how genetic, oxidative stress biomarker, EROD and stable-isotope data may be combined to study trophic position, prey prevalence and environmental stress of mixed S. salar stocks foraging in the sea. (C) 2012 The Authors Journal of Fish Biology (C) 2012 The Fisheries Society of the British Isles
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