Regional differences in vertebral number of chum salmon fry

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  • ANDO DAISEI
    Salmon and Freshwater Fisheries Research Institute, Hokkaido Research Organization
  • SHINRIKI YOSHIHITO
    Donan Research Branch of Salmon and Freshwater Fisheries Research Institute, Hokkaido Research Organization
  • SASAKI YOSHITAKA
    Doto Research Branch of Salmon and Freshwater Fisheries Research Institute, Hokkaido Research Organization
  • YASUTOMI RYOHEI
    Salmon and Freshwater Fisheries Research Institute, Hokkaido Research Organization
  • MISAKA NAOYUKI
    Salmon and Freshwater Fisheries Research Institute, Hokkaido Research Organization
  • MIZUNO SHINYA
    Salmon and Freshwater Fisheries Research Institute, Hokkaido Research Organization
  • MIYAKOSHI YASUYUKI
    Salmon and Freshwater Fisheries Research Institute, Hokkaido Research Organization
  • NAKAJIMA MASAMICHI
    Laboratory of Marine Life Science and Genetics, Graduate School of Agricultural Science, Tohoku University

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Other Title
  • サケ稚魚の脊椎骨数における地域差
  • サケ チギョ ノ セキツイコツスウ ニ オケル チイキサ

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Abstract

北海道の日本海側と太平洋側の河川に遡上したサケ親魚を用いて採卵，媒精させた受精卵を稚魚まで飼育し，脊椎骨数を比較した。太平洋側の河川におけるサケ稚魚の脊椎骨数は，日本海側の河川におけるサケ稚魚の脊椎骨数よりも多い傾向を示した。これより，サケの脊椎骨数には河川間や地域間で差が見られることと，その背景に遺伝的要因が関与していることが示唆された。<br>

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