Natural History of Musashino Minamisawa (III)

DOI

Bibliographic Information

Other Title
  • 武蔵野南沢の自然誌 (III)
  • Intermediate-Type at the Coexistence (Ochiai River) of two Species of genus Phoxinus
  • ヒメハヤ属2種の共存河川（落合川）における中間型系統

Abstract

Two species of the genus Phoxinus, P. lagowskii and P. oxycephalus are distinct species that can be distinguished by morphology and distribution, but juveniles are difficult to identify by morphology. We documented the growth process of Phoxinus from juveniles and examined the length at which it became distinguishable, and conducted subsequent surveys. We conducted RFLP analysis of mitochondrial cytochrome-b and morphological analysis of the appearance of 275 individuals of Phoxinus sp. collected from four rivers including the Ochiai River in Higashikurume City, Tokyo, where both species are considered to coexist. In the Ochiai River, we found hybrids between P. lagowskii and P. oxycephalus, and that both species have been present for many years. The distribution of these fishes in the Ochiai River suggested that there may be areas in the Ochiai River where both species can coexist and areas where hybrids of both species are formed.

Journal

Keywords

Details 詳細情報について

  • CRID
    1390015520419023104
  • DOI
    10.19019/jiyu.8.1_1
  • ISSN
    21896933
  • Text Lang
    ja
  • Data Source
    • JaLC
  • Abstract License Flag
    Allowed

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