Kazutoshi Arai

Most-cited papers

1. Sleep behaviour: Sleep in continuously active dolphins

   Y. Sekiguchi, Kazutoshi Arai, S. Kohshima

   2006Nature48 citations

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2. Vocal Imitation of Human Speech, Synthetic Sounds and Beluga Sounds, by a Beluga (Delphinapterus leucas)

   T. Murayama, So Iijima, H. Katsumata, Kazutoshi Arai

   201425 citations

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3. Preliminary Study of Object Labeling Using Sound Production in a Beluga

   T. Murayama, Yukihide Fujii, Takayuki Hashimoto, Aya Shimoda +7 more

   2012International Journal of Comparative Psychology14 citations Open access

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4. Spontaneous establishing of cross-modal stimulus equivalence in a beluga whale

   T. Murayama, Ryota Suzuki, Yurika Kondo, Mana Koshikawa +2 more

   2017Scientific Reports10 citations Open access

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5. Circulating testosterone and inhibin levels at different ages in the male beluga (Delphinapterus leucas).

   E. Katsumata, Y. Ueda, Kazutoshi Arai, H. Katsumata +3 more

   2012Journal of Veterinary Medical Science10 citations Open access

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6. Circulating gonadotropins and testicular hormones during sexual maturation and annual changes in male bottlenose dolphins (Tursiops truncatus)

   E. Katsumata, S. Jaroenporn, Y. Ueda, Kazutoshi Arai +3 more

   2017Journal of Veterinary Medical Science5 citations Open access

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7. Growth, maturity, reproduction, and life expectancy in ex-situ pacific walruses (Odobenus rosmarus divergens)

   T. Robeck, E. Katsumata, Kazutoshi Arai, G. Montano +3 more

   2022BMC Zoology3 citations Open access

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8. Growth and reproduction of captive Pacific Walrus ( Odobenus rosmarus divergens )

   E. Katsumata, H. Katsumata, Kazutoshi Arai, Y. Nakano +1 more

   20202 citations

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9. Do belugas send sound cues? -Experimental verification of blindfolded imitation among beluga-

   Yoshiaki Maeda, Yukimine Otomo, Hiro Katsumata, Kazutoshi Arai +1 more

   2024International Journal of Comparative Psychology1 citations Open access

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10. Growth and Reproductive Activity of a Captive Female Harbour Porpoise (Phocoena phocoena) from Japanese Water

    Kazutoshi Arai, Gen Nakamura, Yoshiaki Maeda, E. Katsumata +3 more

    20171 citations Open access

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11. Matching of the Gray Whales of off Sakhalin and the Pacific Coast of Japan, with a Note on the Stranding at Wadaura, Japan in March, 2016

    Gen Nakamura, H. Katsumata, Yujin Kim, M. Akagi +3 more

    20171 citations Open access

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12. Characterization of Alpha-fetoprotein Levels in Three Dolphin Species: Development of Sensitive Immunoassays for Analysis of the Pregnancy-associated Variations

    Yuka Morita, Naoshi Hiramatsu, T. Fujita, Haruna Amano +5 more

    2013Journal of reproduction and development1 citations Open access

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13. Spontaneous establishing of cross-modal stimulus equivalence in a beluga whale

    T. Murayama, Ryota Suzuki, Yurika Kondo, Mana Koshikawa +2 more

    2017Scientific Reports0 citations Open access

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14. eScholarship International Journal of Comparative Psychology

    T. Murayama, Yukihide Fujii, Takayuki Hashimoto, Aya Shimoda +7 more

    20140 citations

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15. 海獣類・ペンギン・水鳥に認められた低ナトリウム血症

    Etsuko Katsumata, Kazutoshi Arai, Nao Ueno, Mika Nomura

    20110 citations

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16. Preamplifier in Photoacoustic Densitometry by Fast Laser Beam Scanning

    K. Uchiyama, K. Ohsawa, Y. Yoshimura, Kazutoshi Arai +1 more

    19880 citations Open access

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