Behavioural ecology and reproductive physiology of marine mammals
Trophic ecology and contaminants of marine top predators

Otsuki M, Sugiyama S. Community perspectives inform coastal marine ecosystem research in northwestern Greenland. Polar Science.101112. https://doi.org/10.1016/j.polar.2024.101112 (2024) 

Otsuki M†, Ogawa M†, Watanuki Y, Mitani Y, Ikenaka Y, Ishizuka M, and Thiebot JB. Brood patch size as a field indicator for feather mercury concentration, but not plastic ingestion, in a harvested seabird of the high Arctic: the little auk Alle alle. Polar Science. 101053. https://doi.org/10.1016/j.polar.2024.101053 (2024) †equally contributed

Ishikawa H†, Otsuki M†, Tamura T, Konishi K, Bando T, Ishizuka M, Ikenaka Y, Nakayama S.M.M, Mitani Y. Foraging ecology of mature male Antarctic minke whales (Balaenoptera bonaerensis) revealed by stable isotope analysis of baleen plates. Polar Science. 31:100785. https://doi.org/10.1016/j.polar.2021.100785 (2022) †equally contributed.

Otsuki M, Kohyama K, Goshima W, Kobayashi M, Hasegawa Y, Morita Y, Ijiri S, Mitani Y. Effect of diet on faecal testosterone metabolite levels in a northern fur seal. (Callorhinus ursinus) expressed as ash-free dry weight. Coastal Marine Science. 44(1): 1–6. https://doi.org/10.15083/0002000461 (2021)

Otsuki M, Horimoto T, Kobayashi M, Morita Y, Ijiri S, Mitani Y. Testosterone levels in hair of free-ranging male northern fur seals (Callorhinus ursinus) in relation to sampling month, age class, and spermatogenesis. Conservation Physiology.9:1-11. https://doi.org/10.1093/conphys/coab031 (2021)

Otsuki M, Akamatsu T, Nobetsu T, Mitani Y. Seasonal and diel changes in cetacean vocalizations in Nemuro Strait, adjacent to the Shiretoko World Natural Heritage Site. Marine Mammal Science. 37(4): 1330-1340. https://doi.org/10.1111/mms.12814 (2021)

Otsuki M, Kohyama K, Goshima W, Kobayashi M, Hasegawa Y, Morita Y, Ijiri S, Mitani Y. Non-invasive monitoring of faecal testosterone metabolite concentrations in a northern fur seal (Callorhinus ursinus). Japanese Journal of Zoo and Wildlife Medicine. 25(1):15-20.  https://doi.org/10.5686/jjzwm.25.29 (2020)

Otsuki M, Akamatsu T, Nobetsu T, Mizuguchi D, Mitani Y. Diel changes in ribbon seal Histriophoca fasciata vocalizations during sea ice presence in the Nemuro Strait, Sea of Okhotsk. Polar Biology. 41(3): 451-456.  https://doi.org/10.1007/s00300-017-2203-3 (2018)