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Size-Related Cannibalism among Larval Hynobius nebulosus
Tamotsu Kusano, Harumi Kusano and Kazuyoshi Miyashita
Vol. 1985, No. 2 (May 3, 1985), pp. 472-476
Stable URL: http://www.jstor.org/stable/1444861
Page Count: 5
You can always find the topics here!Topics: Larvae, Human cannibalism, Animal cannibalism, Mouth, Larval development, Ponds, Predators, Fish larvae, Predation, Lizards
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Cannibalistic behavior among Hynobius nebulosus larvae living in a small pond was analyzed using a videotape recording system. Maximum and range of victim size increased with cannibal size. Mouth morphology, i.e., the mouth width of a cannibal relative to the head width of the victim, is an important constraint determining maximum victim size. Time required for a cannibal to swallow its victim varied considerably among trials; there was a significant positive correlation between handling time and size ratio in total length of the victim to the cannibal. Factors affecting the rate of cannibalism in natural populations are discussed.