题名 |
Migration Behavior of Anguilla celebesensis Silver Eels within their Tomini Bay Spawning Area |
DOI |
10.6620/ZS.2023.62-46 |
作者 |
Ryotaro Manabe;Takatoshi Higuchi;Shun Watanabe;Fadly Y. Tantu;Hagi Y. Sugeha;Hiroki Kaneko;Michael J. Miller;Seishi Hagihara;Tatsuki Yoshinaga;Augy Syahailatua;Sam Wouthuyzen;Triyanto;Kawilarang W. A. Masengi;Katsufumi Sato;Jun Aoyama;Katsumi Tsukamoto |
关键词 |
Celebes eel ; Diel vertical migration ; Lunar cycle ; Spawning migration ; Migration distance |
期刊名称 |
Zoological Studies |
卷期/出版年月 |
62卷(2023 / 12 / 01) |
页次 |
1 - 16 |
内容语文 |
英文 |
中文摘要 |
The tropical Celebes eel, Anguilla celebesensis, has a short migration between its spawning and growth habitats. Its spawning areas were hypothesized to be in Tomini Bay and the Celebes Sea after collecting their small leptocephali. However, there is no information about the silver eel oceanic spawning migration behavior of A. celebesensis. To better understand their short-distance spawning migration behavior, four large female silver eels (Eel 1-4) were equipped with pop-up satellite archival tags (PSATs) and released near the mouth of the Poso River in Tomini Bay of Sulawesi Island on 22 February (Eel 1-3) and 11 March 2010 (Eel 4). All PSATs ascended in Tomini Bay and transmitted their data. Eel 3 and 4 provided clear records of consistent diel vertical migration (DVM: eight days-Eel 3, 13 days-Eel 4) with daytime dives to mean depths of 444.7 m (Eel 3) and 539.0 m (Eel 4), where mean temperatures were 9.1°C (Eel 3) and 7.7°C (Eel 4), and nighttime ascents to mean depths of 132.8 m (Eel 3) and 112.4 m (Eel 4), where mean temperatures were 20.6°C (Eel 3) and 23.4°C (Eel 4). Eel 3 and 4 started to dive to deeper water around nautical dawn and swam up to shallower water around sunset. During nighttime, both eels swam in deeper and colder water during nights with moonlight than during nights without moonlight, and there was a negative linear relationship between experienced water temperatures with the moon in the sky and the lunar age for the eels. The A. celebesensis daily rhythm of DVM behaviors was similar to spawning-migration DVM behaviors of other anguillid species. Essential life history characteristics of A. celebesensis appear to be a short migration between freshwater growth habitat and ocean spawning habitat, and high GSI values with advanced gonadal development in downstream-migrating silver eels. |
主题分类 |
生物農學 >
動物學 |