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Reproduction of black throated diver gavia arctica in relation to fish density in oligotrophic lakes in southwestern sweden



Reproduction of black throated diver gavia arctica in relation to fish density in oligotrophic lakes in southwestern sweden



Ornis Scandinavica 17(3): 245-248



A comparison of density of fish (< 20 cm) and production of "large" (halfgrown-fledged) Gavia arctica young in 24 oligotrophic lake in southwestern Sweden revealed a negative relationship between the two variables. High abundance of aquatic insects, suitable as an alternative food to fish for the young, and a low risk of predation by Esox lucius are suggested as two, not mutually exclusive explanations for the higher production of young in lakes with a low density of fish.

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Accession: 006315852

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DOI: 10.2307/3676833


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