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Food Habits and Predatory Role of the Japanese Lacertid Takydromus tachydromoides

Dale R. Jackson and Sam R. Telford, Jr.
Copeia
Vol. 1975, No. 2 (May 23, 1975), pp. 343-351
DOI: 10.2307/1442889
Stable URL: http://www.jstor.org/stable/1442889
Page Count: 9
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Food Habits and Predatory Role of the Japanese Lacertid Takydromus tachydromoides
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Abstract

The Japanese lacertid Takydromus tachydromoides is an opportunistic, generalized predator; its diet consists chiefly of spiders and insects although other small arthropods and gastropods may be taken. Prey are lognormally distributed by size. Age-, season- and habitat-specific dietary differences are intimately related to the habits of this species. Such differences occur primarily in response to prey densities and are of adaptive value to the lizards. Most prominent among these differences is the ratio of insects to spiders in the diet. Competition between adult and juvenile lizards is reduced through partial nonoverlap of food resources and structural habitats. Takydromus displays certain aspects of predation recognized in the past predominantly from larger and better-known mammalian and reptilian carnivores. As a predator Takydromus probably exerts little limiting influence on its prey.

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