著者

Shintaro TANABE Eiiti KASUYA Takahisa MIYATAKE

出版者

The Herpetological Society of Japan

雑誌

Current Herpetology (ISSN:13455834)

巻号頁・発行日

vol.38, no.1, pp.14-22, 2019 (Released:2019-02-28)

参考文献数

29

被引用文献数

1

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The traits of many animal species exhibit individual and sexual differences. Individuals repeatedly receiving a stimulus without harm become habituated to it. However, few studies have been conducted on individual and sexual differences in the process of habituation to unfamiliar food stimuli. Therefore, we hypothesized that individual differences or sexual differences would be observed in reaction to an in-lab food-stimuli presentation of potential prey items (after that “food stimuli”). We tested the hypothesis using the Japanese tree frog Hyla japonica, and conducted statistical analyses of these results. A generalized linear model (GLM) showed individual and sexual differences in time to get used to the food stimuli. Females habituated more rapidly to food stimuli than males. The difference between sexes is discussed in view of two ultimate and one proximate reasons.

著者

Kensuke Okada Takahisa Miyatake

出版者

JAPANESE SOCIETY OF APPLIED ENTOMOLOGY AND ZOOLOGY

雑誌

Applied Entomology and Zoology (ISSN:00036862)

巻号頁・発行日

vol.42, no.3, pp.411-417, 2007 (Released:2007-09-20)

参考文献数

19

被引用文献数

5 6

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Librodor japonicus (Motschulsky) is distributed throughout the satoyama forests in Japan, and inhabits the saps of oak trees all its life. Although the beetle is a potential indicator of bio-resource abundance in the satoyama forests, the life history traits and seasonal abundance have not been studied. In this study, first, the seasonal abundance of L. japonicus was investigated using banana bait traps in Okayama City in 2002. Two peaks of abundance were found: a large peak from April to June and a small peak from August to September. The beetles oviposited on banana slices, and a successful artificial rearing method was established using only banana slices and leaf mold. The effect of temperature on the survival rate, adult size and developmental period was examined at different temperatures. The survival rate and the adult size tended to be greater at 25°C than at other temperatures. The thermal thresholds and thermal constants calculated from egg to adult development were 5.6 and 5.9°C and 1,010.9 and 1,022.0 degree-days for females and males, respectively. On the basis of these developmental parameters and the seasonal abundance of L. japonicus, the number of generations per year in Okayama, Japan, was estimated to be one.