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Inferring the demographic history of Japanese eel ( Anguilla japonica ) from genomic data: Insights for conservation and fisheries management
Author(s) -
Faulks Leanne,
Kaushik Prashant,
Taniguchi Shoji,
Sekino Masashi,
Nakamichi Reiichiro,
Yamamoto Yuki,
Fujimori Hiroka,
Okamoto Chiaki,
Kodama Sakie,
Daryani Ayu,
Manwong Angel Faye,
Galang Ishmerai,
Mochioka Noritaka,
Araki Kiyo,
Suzuki Motoo,
Kaji Yoshitsugu,
Ichiki Takumi,
Matsunaga Tetsuya,
Hakoyama Hiroshi
Publication year - 2022
Publication title -
aquatic conservation: marine and freshwater ecosystems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.95
H-Index - 77
eISSN - 1099-0755
pISSN - 1052-7613
DOI - 10.1002/aqc.3810
Subject(s) - effective population size , population , biology , endangered species , demographic history , inbreeding , population size , fishery , ecology , zoology , genetic diversity , demography , sociology , habitat
Assessing the status or population size of species is a key task for wildlife conservation and the sustainable management of harvested species. In particular, assessing historical changes in population size provides an evolutionary perspective on current population dynamics. Japanese eel ( Anguilla japonica ) is an endangered yet commercially important catadromous fish species. This article assesses the demographic history of Japanese eel using the pairwise and multiple sequentially Markovian coalescent methods. The analyses indicate a reduction in effective population size N e from 38,000 to 10,000 individuals between 4 and 1 Mya, followed by an increase to 80,000 individuals between 1 Mya and 22–30 kya. Approximately 22–30 kya there is evidence for a reduction in N e to approximately 60,000 individuals. These events may be related to changes in environmental conditions, especially around the last glacial maximum (19–33 kya). The results of this study suggest that Japanese eel has experienced at least two population bottlenecks, interspersed by a period of population growth. The overall level of genetic diversity is relatively low, although there is no evidence for inbreeding. Data from this study will be used to help model the extinction risk of Japanese eel.