Search Results - "Koga, Tsunenori"

Male Pagurus minutus hermit crabs use multiple types of information in decisions to give up male–male contests by Yasuda, Chiaki I., Koga, Tsunenori

“…Organisms use information to make adaptive decisions in various contexts, including aggression. Potentially weaker, but better-informed, contestants should…”
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Importance of weapon size in all stages of male-male contests in the hermit crab Pagurus minutus by Yasuda, Chiaki I., Koga, Tsunenori

“…Physical traits such as body size and weapon size typically reflect an individual's resource holding potential (RHP). During male-male contests, contestants…”
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Climbing behavior of guarding males in the hermit crab Pagurus minutus: the effect of rivals, female size, and being weaponless by Tanaka, Takayoshi, Yasuda, Chiaki I., Koga, Tsunenori

“…Male crustaceans engage in precopulatory mate-guarding to monopolize a female. However, a conspecific rival often takes the female from the guarding males…”
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Seasonal change in sexual size dimorphism of the major cheliped in the hermit crab Pagurus minutus by Yasuda, Chiaki I., Otoda, Masaya, Nakano, Reiko, Takiya, Yuki, Koga, Tsunenori

“…Sexual size dimorphism is a common phenomenon in the animal kingdom, and its seasonal change has been reported in some species that possess traits dimorphic…”
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Chelipeds are the real weapon: cheliped size is a more effective determinant than body size in male—male competition for mates in a hermit crab by Yoshino, Kenji, Koga, Tsunenori, Oki, Sayaka

“…To understand the evolution of weapons, we must understand both their functions and relative importance compared to body size in determining fighting success…”
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Temporal changes in the reproductive population structures and males' secondary sexual character of the hermit crab Diogenes nitidimanus by Koga, Tsunenori, Yoshino, Kenji, Fukuda, Yuri

“…We investigated the reproductive ecology of D. nitidimanus in the Waka-River estuary with special reference to temporal change in the relative size of chelae…”
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Elevated predation risk changes mating behaviour and courtship in a fiddler crab by Koga, Tsunenori, Backwell, Patricia R. Y., Jennions, Michael D., Christy, John H.

“…Quiscalus mexicanus…”
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WAVING DISPLAY BY MALE SCOPIMERA GLOBOSA (BRACHYURA: OCYPODOIDEA) AS COURTSHIP BEHAVIOR by Ohata, Mari, Wada, Keiji, Koga, Tsunenori

“…Male sand-bubbler crabs Scopimera globosa perform a waving display during their reproductive season, but waving is not used when a male is paired with a…”
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The Assessment of Female Reproductive State during Courtship and Scramble Competition in the Fiddler Crab, Uca paradussumieri by Murai, Minoru, Koga, Tsunenori, Yong, Hoi-Sen

“…Male fiddler crabs, Uca paradussumieri, mate underground during a 4- to 7-day period each full and new moon. As soon as the tide recedes, males enter the…”
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Fighting with an unreliable weapon: opponent choice and risk avoidance in fiddler crab contests by Muramatsu, Daisuke, Koga, Tsunenori

“…Current signaling theories predict that animal signals are generally honest, but each signaling system allows some admixture of deception. Male fiddler crabs…”
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Mate acceptance and guarding by male fiddler crabs Uca tetragonon (Herbst) by Goshima, Seiji, Koga, Tsunenori, Murai, Minoru

“…The fiddler crab, Uca tetragonon (Herbst) mates both on the surface near female-defended burrows and underground in male-defended burrows. In underground…”
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Does prior residency interact with loss? A study of male–male contests in the hermit crab Pagurus minutus by Yasuda, Chiaki I., Kaida, Takehiro, Koga, Tsunenori, Herberstein, Marie Elisabeth

“…Residency is an important predictor of success in contests with ownership asymmetries. Residency often can interact with a winning experience. However, given…”
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Perceived predation risk and mate defense jointly alter the outcome of territorial fights by Koga, Tsunenori, Ikeda, Satoshi

“…Virtually all animal conflicts occur over access to mates or resources that affect survival, the two key components of fitness. In this paper, we report that…”
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MALE-MALE COMPETITION AND INTERSEXUAL INTERACTIONS IN UNDERGROUND MATING OF THE FIDDLER CRAB UCA PARADUSSUMIERI by Koga, Tsunenori, Murai, Minoru, Yong, Hoi-Sen

“…Abstract We investigated inter-male competition for female mates and intersexual interactions in underground mating (UM) of the fiddler crab Uca paradussumieri…”
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trematode infection with no effect on reproductive success of a sand-bubbler crab by Koga, Tsunenori

“…The infection effects of the parasitic digenean trematode on the body weight and reproductive success of the sand-bubbler crab were examined. Gynaecotyla…”
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Do weaponless males of the hermit crab Pagurus minutus give up contests without escalation? Behavior of intruders that lack their major cheliped in male–male contests by Yasuda, Chiaki I., Koga, Tsunenori

“…In dyadic contests, theoretical studies have predicted that weaker contestants are less likely to engage in fights to minimize the cost of aggression. Since…”
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Green tide formed by free-floating Ulva spp. at Yatsu tidal flat, Japan by Yabe, Tohru, Ishii, Yuichi, Amano, Yoshimasa, Koga, Tsunenori, Hayashi, Seiji, Nohara, Seiichi, Tatsumoto, Hideki

“…Green tides at Yatsu tidal flat, Tokyo Bay, Japan, were first reported in 1995 and formed by a bloom only of free-floating Ulva species. On the tidal flat, the…”
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Sperm Competition and the Assurance of Underground Copulation in the Sand-Bubbler Crab Scopimera globosa (Brachyura: Ocypodidae) by Koga, Tsunenori, Henmi, Yasuhisa, Murai, Minoru

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Resource value differentially affects fighting success between reproductive and non-reproductive seasons by Sultana, Zakea, Takaoka, Junko, Koga, Tsunenori

“…Inter-male competition for resources is usually studied during species’ reproductive seasons because fighting is common and conspicuous, but how this…”
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Erratum to: Abstracts from the Japanese Journal of Limnology by Onda, Yuuji, Ohsawa, Shinji, Takamatsu, Nobuki, Sonoda, Takeshi, Nakao, Shigeru, Kiyoshige, Satoru, Chiba, Susumu, Yamamoto, Yoko, Yamamoto, Toko, Toda, Hiroko, Morikawa, Kazuko, Okumura, Yasuaki, Endoh, Shuichi, Hiroki, Mikiya, Yabe, Toru, Nohara, Seiichi, Utagawa, Hirokatsu, Satake, Kiyoshi, Koga, Tsunenori, Ueno, Ryuhei, Kawachi, Masanobu, Watanabe, Makoto M., Katagami, Yukimi, Nakayama, Keisuke, Kim, Ho-Sub, Yonedzuka, Sayoko, Park, Ho-Dong, Haga, Hiroki, Ohtsuka, Taisuke, Ishikawa, Kanako, Tsujimura, Shigeo, Nakahara, Hiroyuki, Kumagai, Michio, Hanabishi, Kana, Yabe, Tohru

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