Validity of Back-calculation Methods of Body Size from Phalangeal Bones : An Assesment Using Data for Rana japonica

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概要

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• Lines of arrested growth (LAGs) appearing in bone sections are useful for age estimation. They also indicate the past growth process in amphibians in temperate zones. Several back-calculation formulae (BCFs) use LAGs to estimate an individuals body size at an earlier time based on the current body size. In order to evaluate the validity of these BCFs, we conducted a mark-recapture and skeletochronological study of female Rana japonica in Higashi-Hiroshima, Japan, from 1995 to 1999. The body sizes of 31 recaptured frogs were back-calculated using eight different BCFs and were compared with the frogs actual body sizes as measured at the previous capture. The most accurate estimation was made by the simplest BCF (Dahl-Lea method) without any regressions between body size and bone diameter; that is, Li=Lc(Di/Dc) (L: snout-vent length, D: bone diameter, c: at the time of capture [recapture], i: at the i-th winter).

• 日本爬虫両棲類学会の論文

著者

• UEDA Hiroaki

  Laboratory for Amphibian Biology, Faculty of Science, Hiroshima University

• Ueda H

  Optics Technology Division Takatsuki Laboratory Minolta Co. Ltd.

• Ueda Hiroaki

  Laboratory For Amphibian Biology Faculty Of Science Hiroshima University

• Marunouchi Junsuke

  Laboratory for Amphibian Biology, Graduate School of Science, Hiroshima University

• Kusano Tamotsu

  Department of Biology, Faculty of Science, Tokyo Metropolitan University

• Kusano Toshihisa

  Department Of Biology Faculty Of Science Tokyo Metropolitan University

• Marunouchi J

  Kanagawa Prefectural Museum Of Natural Histoty Odawara Jpn

• Ueda Hiroaki

  Laboratories Of Image Information Science And Technology

• KUSANO Tamotsu

  Department of Biological Sciences, Graduate School of Science and Engineering, Tokyo Metropolitan University

• Ueda Hiroaki

  Laboratories of Image Information Science and Technelogy, Osaka City University

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