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Iteroparity of stream resident masu salmon Oncorhynchus masou
Author(s) -
Morita Kentaro,
Tsuboi Junichi,
Sahashi Genki,
Kikko Takeshi,
Ishizaki Daisuke,
Kishi Daisuke,
Endo Shinsuke,
Koseki Yusuke
Publication year - 2018
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/jfb.13771
Subject(s) - oncorhynchus , semelparity and iteroparity , biology , zoology , fishery , population , ecology , life history , fish <actinopterygii> , demography , sociology
The degree of iteroparity in stream‐resident forms of masu salmon Oncorhynchus masou was examined using mark–recapture studies in natural streams. In a partially migratory population, at least 10% of resident males survived after maturation and repeatedly matured for up to 5 years. In the landlocked amago salmon subspecies, the post‐maturation survival rate was at least 7% and repeat maturation was observed for up to 3 years for both males and females.