Status-dependent female mimicry in landlocked red-spotted masu salmon

Yuichi Kano, Yoshitaka Shimizu, Kouzou Kondou

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


We observed transient status-dependent female mimicry related to reproductive behaviour in landlocked red-spotted masu salmon (Oncorhynchus masou ishikawae). In females, the lower half of the lateral flank underwent solid blackening as an ovipositional character, and 70% of subordinate males showed a similar lateral pattern (M-type). In contrast, most of the paired males and 30% of subordinate males showed a different lateral pattern in which a melanic stripe ran along the lateral-line organ (N-type). It was possible to bring an M-type pseudo-fish model into closer proximity to a pair than an N-type model. In addition, the rate of successful sperm release in subordinate M-type males was higher than that in subordinate N-type males. Males could transform between N- and M-types according to fluctuations in competitive status among the males. A digital video image related to the article is available at =momo050119rm01a.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalJournal of Ethology
Issue number1
Publication statusPublished - Jan 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology


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