Food habit of the juvenile of the Japanese newt Cynops pyrrhogaster

Kumi Matsui, Koji Mochida, Masahisa Nakamura

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    The previous study showed that the red coloration of the ventral skin of the Japanese newt Cynops pyrrhogaster was associated with the number of carotenoid vesicles and the content of carotenoid in the pigment cell of the skin. To elucidate the mechanism for the red coloration of the skin of the newt, we studied the food habit of the juvenile from the Japanese newt Cynops pyrrhogaster. Sixty-two juveniles were collected in Fukue Island in Nagasaki Prefecture from November 2000 to May 2002 and divided into 2 groups according to the snout-vent length (SVL). Over 400 prey animals were obtained from the juveniles by stomach flushing. In the larger group (SVL>30.0mm), Collembola (45.4%) and Acari (12.6%), which are very common species of soil animals, were the prey animals dominant in number. In the group with the smaller SVL (<29.9mm), Collembola (30.4%) and Acari (25.4%) were in number as well. We also studied the food habit of the Japanese clouded salamander, Hynobius nebulosus. In the salamander, Doratodesmidae (56.5%) and Amphipoda (13%) were the prey animals dominant in number. Our results, taken together, suggest that the Japanese juvenile C. pyrrhogaster does not change its food habit as it grows, and that it eats soil animals common in its habitat. Moreover, the food habit of juvenile C. pyrrhogaster differs from that of H. nebulosus, although the juveniles of both species live in the same area.

    Original languageEnglish
    Pages (from-to)855-859
    Number of pages5
    JournalZoological Science
    Volume20
    Issue number7
    DOIs
    Publication statusPublished - 2003 Jul 1

    Fingerprint

    salamanders and newts
    skin (animal)
    Collembola
    animals
    Acari
    carotenoids
    color
    Amphipoda
    soil
    stomach
    pigments
    habitats
    cells

    Keywords

    • Food habits
    • Newt Cynops pyrrhogaster
    • Salamander H. nebulosus

    ASJC Scopus subject areas

    • Animal Science and Zoology

    Cite this

    Food habit of the juvenile of the Japanese newt Cynops pyrrhogaster. / Matsui, Kumi; Mochida, Koji; Nakamura, Masahisa.

    In: Zoological Science, Vol. 20, No. 7, 01.07.2003, p. 855-859.

    Research output: Contribution to journalArticle

    Matsui, Kumi ; Mochida, Koji ; Nakamura, Masahisa. / Food habit of the juvenile of the Japanese newt Cynops pyrrhogaster. In: Zoological Science. 2003 ; Vol. 20, No. 7. pp. 855-859.
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