Abstract
Many studies have investigated the ecology of charrs in freshwater, however, little is known about charrs in the ocean. This study examined the distribution, seasonal abundance, and some biological features of Dolly Varden (Salvelinus malma) in the Pacific Ocean. An analysis of by-catch data of Japanese offshore salmon monitoring showed that Dolly Varden were distributed across a wide range in the offshore waters of the Pacific Ocean, including the Japan Sea, Bering Sea, and Okhotsk Sea. The catch per unit effort showed a sharp increase from May to August, followed by a sharp decrease in September. Offshore areas served as an important summer habitat for anadromous Dolly Varden.
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Acknowledgements
This research was supported by the Promotion Program for International Resources Surveys of the Fisheries Agency of Japan and a Grant-in-Aid for Young Scientists B (no.19780155) from Japan Society for the Promotion of Science.
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This paper is presented in 2006 International Charr Symposium, Reykjavik, Iceland (Noakes 2008).
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Morita, K., Morita, S.H., Fukuwaka, Ma. et al. Offshore Dolly Varden charr (Salvelinus malma) in the North Pacific. Environ Biol Fish 86, 451–456 (2009). https://doi.org/10.1007/s10641-009-9547-7
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DOI: https://doi.org/10.1007/s10641-009-9547-7