Get access
Advertisement

Correlation among dominance status, metabolic rate and otolith size in masu salmon

Authors

  • T. Yamamoto,

    Corresponding author
    1. Toya Lake Station for Environmental Biology, Faculty of Fisheries, Hokkaido University, Abuta, Hokkaido 049-57, Japan
    2. Graduate School of Environmental Earth Science, Hokkaido University, Sapporo 060, Japan
      ‡Author to whom correspondence should be addressed at: Toya Lake Station for Environmental Biology, Faculty of Fisheries, Hokkaido University, Abuta, Hokkaido 047-57, Japan. Tel.: +81 142 75 2651; fax: +81 142 75 2943; email: toshy@exfor.agr.hokudai.ac.jp
    Search for more papers by this author
  • H. Ueda,

    1. Toya Lake Station for Environmental Biology, Faculty of Fisheries, Hokkaido University, Abuta, Hokkaido 049-57, Japan
    Search for more papers by this author
  • S. Higashi

    1. Graduate School of Environmental Earth Science, Hokkaido University, Sapporo 060, Japan
    Search for more papers by this author

‡Author to whom correspondence should be addressed at: Toya Lake Station for Environmental Biology, Faculty of Fisheries, Hokkaido University, Abuta, Hokkaido 047-57, Japan. Tel.: +81 142 75 2651; fax: +81 142 75 2943; email: toshy@exfor.agr.hokudai.ac.jp

Abstract

In spatial competition between individuals, neither fish sex nor body mass affected dominance status in masu salmon Oncorhynchus masou . In contrast, resting metabolic rate (MR) was significantly correlated with dominance status, indicating that a high metabolic rate can increase the dominance rank of juvenile salmon. Whole animal growth rate was significantly correlated with MR, but not with initial body weight. This suggests that the body size of masu salmon is not a cause, but rather a consequence, of dominance status which is closely related to MR. The increment width between otolith daily rings was also significantly correlated with MR. Thus, the size of the Otolith may indicate the degree of MR.

Get access to the full text of this article

Ancillary