Reconstructing the experienced temperature during the larval oceanic migration of anguillid eels from otolith stable oxygen isotopes

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Янв. 10, 2025

Migration routes and the depth patterns of anguillid eel larvae migrating long distances from spawning grounds in ocean remain poorly understood. We used otolith stable isotope analysis to study oceanic migrations eels by reconstructing experienced water temperature histories larvae. The oxygen isotopes (δ18Ootolith) recruited Anguilla japonica glass were analyzed assess relationship with early larval stage laboratory experiments. A negative linear between rearing δ18Ootolith values was observed for leptocephali reared at five different temperatures 19 °C 27 °C. Subsequently, obtained equation applied estimate wild-caught during their migration according recruitment latitude, season, species. A. significantly higher latitudes Taiwan Japan later periods 6 months, November March, indicating that individuals exposed lower along Kuroshio flowing northward as they reached seasons. Furthermore, temperate than those tropical marmorata, same locations southern Taiwan. This suggests migratory behavior may differ two species, although have sympatric areas western North Pacific. Collectively, these results suggest provides a reasonable estimation prove useful history ocean.

Язык: Английский

Evaluation of the Asymmetric distribution of Japanese eel recruitment to eastern and western Japan

Regional Studies in Marine Science, Год журнала: 2025, Номер unknown, С. 104243 - 104243

Опубликована: Май 1, 2025

Язык: Английский