https://scholars.lib.ntu.edu.tw/handle/123456789/454412
標題: | Effect of ENSO events on larval and juvenile duration and transport of Japanese eel (Anguilla japonica) | 作者: | Hsiung, Kuan-Mei Kimura, Shingo YU-SAN HAN Takeshige, Aigo Iizuka, Yoshiyuki |
公開日期: | 2018 | 卷: | 13 | 期: | 4 | 來源出版物: | PLoS ONE | 摘要: | Spawning ground of Japanese eel (Anguilla japonica) is located near the West Mariana Ridge seamount. The species travels through the North Equatorial Current (NEC) and then enters the Kuroshio Current (KC) on the migration toward East Asian growth habitats. Therefore, El Niño–Southern Oscillation (ENSO) events serve as the potentially important drivers of interannual variability across the equatorial Pacific. Because the NEC bifurcation and salinity profiles are related to ENSO events, we investigated the influence of locations of the NEC bifurcation and salinity front on the success of larval entry to the KC by numerically modeling particle transport in ocean currents from 1972 to 2013 and possible effects on the size of glass eels at continental recruitment and, via otolithometry on the duration of larval migration. Circulation and hydrography used for particle tracking were obtained from the results of the Model for Interdisciplinary Research on Climate (MIROC) high-resolution forecasting experiment. Our results demonstrated that during El Niño years, (1) the southward movement of the salinity front might cause the larvae to experience slower currents and (2) the northward movement of the NEC bifurcation might broaden the separation between their spawning ground and NEC bifurcation, thus prolonging the time needed for the larvae to enter the KC from their spawning ground, because of which the duration of entrainment in the water column and body size increase when eels reach estuarine waters. In addition, this might cause more water to flow into the Mindanao Current (MC), leading to a decline in the rate at which larvae get entrained into the KC. © 2018 Hsiung et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/454412 https://www2.scopus.com/inward/record.uri?eid=2-s2.0-85045251242&doi=10.1371%2fjournal.pone.0195544&partnerID=40&md5=53ec6582d2d00a01baadc9a3ce8e3da5 |
ISSN: | 19326203 | DOI: | 10.1371/journal.pone.0195544 | SDG/關鍵字: | brackish water; Anguilla japonica; Article; body size; climate change; El Nino; forecasting; geographic and geological phenomena; hydrography; larva; larval stage; measurement; migration; nonhuman; north equatorial current; ocean current; otolith; otolithometry; salinity; spawning; animal; statistical model; water flow; Anguilla; Animals; El Nino-Southern Oscillation; Larva; Models, Statistical; Water Movements |
顯示於: | 漁業科學研究所 |
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