ニホンヒキガエル Bufo japonicus japonicus の自然誌的研究 : XI. 年令・大きさと♂の抱接成功率

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  • STUDIES ON THE NATURAL HISTORY OF THE JAPANESE TOAD, BUFO JAPONICUS JAPONICUS : XI. RANDOM MALE MATING IN RELATION TO HIS AGE AND SIZE
  • ニホンヒキガエルBufo japonicus japonicusの自然誌的研究-11-年令・大きさと♂の抱接成功率
  • ニホンヒキガエル Bufo japonicus japonicus ノ シゼン

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抄録

Male mating success of the Japanese toad, Bufo japonicus japonicus, in relation to age and size, was investigated in 15 breeding groups at 3 ponds in the Botanical Garden of Kanazawa University. Correlations between the rates of male mating success and age (2-10 years old) were nearly constant (about 15%), except for males aged 2 (21.4%) and 7 (26.3%). There was a nonsignificant difference between body length of paired males and that of unpaired males. These results suggest that male-male competition for females reported in some Bufo spp. does not occur in B. japonicus japonicus.

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