The occurrence and run timing of naturally spawning chum salmon in northern Japan

  title={The occurrence and run timing of naturally spawning chum salmon in northern Japan},
  author={Yasuyuki Miyakoshi and Hirokazu Urabe and Hayato Saneyoshi and Tomoya Aoyama and Hiroyuki Sakamoto and Daisei Ando and Kiyoshi Kasugai and Yoshio Mishima and Masayuki Takada and Mitsuhiro Nagata},
  journal={Environmental Biology of Fishes},
Since the late 20th century, the biomass of Pacific salmon Oncorhynchus spp. has increased. Hokkaido, northern Japan, is one of the main areas of chum salmon O. keta production in the North Pacific and intensive hatchery programs support the recent high abundance. However, proper management of naturally spawning populations is necessary to conserve healthy stocks of this species. In 2008, we started a program to assess the naturally spawning chum salmon populations in Hokkaido. Of the total of… CONTINUE READING


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