JAPANESE JOURNAL OF ECOLOGY
Online ISSN : 2424-127X
Print ISSN : 0021-5007
ISSN-L : 0021-5007
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Volume 59, Issue 2
Displaying 1-20 of 20 articles from this issue
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Original Articles
  • Seasonal movements of the Japanese giant salamander (Andrias japonicus) : Evidence for possible breeding migration by this stream-dwelling amphibian
    Yuki Taguchi
    Article type: Article
    2009 Volume 59 Issue 2 Pages 117-128
    Published: July 31, 2009
    Released on J-STAGE: April 20, 2017
    DOIhttps://doi.org/10.18960/seitai.59.2_117
    JOURNAL FREE ACCESS
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    It is not known whether amphibian species inhabiting lotic habitats migrate to breeding sites within a stream, as migratory amphibians, such as most frogs, toads, and ambystomatid, hynobiid, and salamandrid salamanders, migrate from land to water to breed. This study examined whether breeding migration occurs in the Japanese giant salamander (Andrias japonicus) by analyzing features of seasonal movements and the factors that affect them. Over a 1-year period, 200 individuals from the Hatsuka River in Hyogo Prefecture were tracked in a mark-recapture study. The significant effects of the variable date on the distance of movement were confirmed in the generalized additive model. Seasonal movements were analyzed by comparing the distances moved between the pre-, post-, and nonbreeding seasons. Andrias japonicus moved approximately 200m upstream, on average, during the prebreeding season and moved downstream the same distance during the postbreeding season. This was based on many short-distance moving individuals and a few relatively long-distance moving individuals; the farthest distance moved was 3969m upstream. The upstream movement in the prebreeding season is probably related to oviposition, which occurs from late August to early September. In addition, in the nonbreeding season, from winter to spring, Andrias japonicus remained in, essentially, the same site. Therefore, the seasonal movements observed in this study can be considered "breeding migration" in the stream-dwelling amphibian, the Japanese giant salamander.
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Feature 1 Molecular approaches to the study of biological invasions
Feature 2 A starting guide for data analyses using Bayesian estimation
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