Hynobius abei Sato, 1934
Abe's Salamander, Abe Sansho-uo
Distribution and Habitat
Country distribution from AmphibiaWeb's database: Japan
Life History, Abundance, Activity, and Special Behaviors
Females can lay anywhere from 26 to 109 eggs. The eggs are laid in 2 coiled sacs with longitudinal folds, beneath the layer of leaves. After the clutch is deposited, the male remains near the egg sacs for a time. The larvae develop under the snow. They generally mature quickly once the snow melts, though some will overwinter as larvae. Metamorphosis usually occurs in June or July, but occasionally not until August. Juveniles do not disperse far from the breeding pool. (Goris and Maeda 2004).
This species is nocturnal, foraging at night. It is carnivorous, preying on earthworms, spiders, and snails (Goris and Maeda 2004) as well as various insects and aquatic invertebrates (Hutchins et al. 2003).
Trends and Threats
Possible reasons for amphibian decline
General habitat alteration and loss
The karyotype of Hynobius abei is 2n = 56, with 9 large, 4 medium, and 15 small pairs. Chromosomal characteristics distinguishing this species include one pair of acrocentric chromosomes in the medium-sized group and 5 pairs of bi-armed chromosomes in the small-sized group. (Seto and Matsui 1984). In addition, H. abei has a very short C-positive/R-negative band in the terminal region of the long arm of chromosome 2, as well as a very short band composed of the entire short arm of chromosome 10 (Izumisawa et al. 1990).
Goris, R.C. and Maeda, N. (2004). Guide to the Amphibians and Reptiles of Japan. Krieger Publishing Company, Malabar, Florida.
Izumisawa, Y., Ikebe, C., Kuro-O., M., and Kohno, S. (1990). ''Cytogenetic studies of Hynobiidae (Urodela). IX. Karyological characters of Hynobius abei Sato by means of R- and C-banding.'' Cellular and Molecular Life Sciences, 46(1), 104-106.
Seto, T., and Matsui, M. (1984). ''Karyotype of the Japanese salamander, Hynobius abei.'' Cellular and Molecular Life Sciences, 40(8), 874.
Originally submitted by: Peera Chantasirivisal (first posted 2006-02-23)
Edited by: Kellie Whittaker (2008-01-03)
Species Account Citation: AmphibiaWeb 2008 Hynobius abei: Abe's Salamander <https://amphibiaweb.org/species/3878> University of California, Berkeley, CA, USA. Accessed May 29, 2023.
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Citation: AmphibiaWeb. 2023. <https://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 29 May 2023.
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