Stock-specific variation of trophic position, diet and environmental stress markers in Atlantic salmon Salmo salar during feeding migrations in the Baltic Sea
| Autor: | Mikko Nikinmaa, Mikko Kiljunen, Kristiina A. Vuori, M.-L. Koljonen, Mirella Kanerva |
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| Rok vydání: | 2012 |
| Předmět: |
Male
Foraging Salmo salar Aquatic Science Biology Environment Environmental stress Predation Cytochrome P-450 CYP1A1 Animals Salmo Ecology Evolution Behavior and Systematics Stock (geology) Trophic level Carbon Isotopes Nitrogen Isotopes Ecology Sequence Analysis DNA biology.organism_classification Glutathione Diet Oxidative Stress Baltic sea Animal Migration Female Lipid Peroxidation Bay Biomarkers Microsatellite Repeats |
| Zdroj: | Journal of fish biology. 81(6) |
| ISSN: | 1095-8649 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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