Stable isotope ratios of carbon,nitrogen and oxygen in killer whales (Orcinus orca) stranded on the coast of Hokkaido,Japan |
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| Institution: | 1. School of Pharmaceutical Sciences, Health Sciences University of Hokkaido, 1757 Kanazawa, Ishikari-Tobetsu, Hokkaido 061-0293, Japan;2. SI Science Co. Ltd., 473-3 Hongou, Sugito-machi, Kitakatsushika, Saitama 345-0023, Japan;3. Faculty of Bioindustry, Tokyo University of Agriculture, 196 Yasaka, Abashiri 099-2493, Japan;4. Faculty of Fisheries Sciences, Hokkaido University, 3-1-1 Minato-cho, Hakodate, Hokkaido 041-8611, Japan;5. Daiichi College of Pharmaceutical Sciences, 22-1 Tamagawa-cho, Minami-Ku, Fukuoka 815-8511, Japan;1. Biodiversity Research Institute, 652 Main Street, Gorham, ME 04038, United States;2. Rhode Island Department of Environmental Management, 277 Great Neck Rd., West Kingston, RI 02892, United States;3. U.S. Fish and Wildlife Service, Parker River NWR, 6 Plum Island Turnpike, Newburyport, MA 01950, United States;4. U.S. Fish and Wildlife Service, Rachel Carson NWR, 321 Port Rd., Wells, ME 04090, United States;5. Battelle Marine Sciences Lab, 1529 W. Sequim Bay Rd., Sequim, WA 98382, United States;1. Department of Biology and Medical Parasitology, Pomeranian Medical University, Powstancow Wielkopolskich 72, 70-111 Szczecin, Poland;2. Department of Coal Chemistry and Environmental Sciences, Faculty of Energy and Fuels, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland;3. Department of Animal Reproduction Biotechnology and Environmental Hygiene, West Pomeranian University of Technology, Doktora Judyma 10, 71-466 Szczecin, Poland;4. Laboratory of Biology and Ecology of Parasites, West Pomeranian University of Technology, Doktora Judyma 10, 71-466 Szczecin, Poland;1. Agència Catalana de l’Aigua (ACA), C. Provença 204, Barcelona 08036, Spain;2. Centre d’Estudis Avançats de Blanes (CSIC), C/Acc. Cala S. Francesc, 14, Girona 17300, Spain;4. Departament d’Ecologia, Universitat de Barcelona, Barcelona 08028, Spain;1. Center for Natural Resources Development and Protection, Department of Civil and Environmental Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USA;2. Center for Offshore Oil, Gas and Energy Research, Department of Fisheries and Oceans Canada, Bedford Institute of Oceanography, Dartmouth, NS B2Y 4A2, Canada;3. Department of Earth and Environmental Sciences, Rutgers University, Newark, NJ 07102, USA |
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| Abstract: | We analyzed δ13C, δ15N and δ18O in the muscle and liver from killer whales stranded on the coast of Japan. The δ15N values in the muscle samples from calves were apparently higher than those in their lactating mothers, suggesting that nursing may result in the higher δ15N values in the muscle samples of calves. The δ15N value in the muscle samples of male and female whales, except for the calves, were positively correlated with the δ13C values and body length, suggesting that the increases in δ15N were due to the growth of the whales and increase in their trophic level. In contrast, the δ18O values in the muscle samples of female whales except for the calves were negatively correlated with the δ13C and δ15N values. The δ18O may be lower in whales occupying higher trophic positions (δ15N), although it might also be affected by geographic and climatic conditions. |
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| Keywords: | Mercury Lactation |
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