国立研究開発法人 国際農林水産業研究センター | JIRCAS

Migratory Pattern of the Spotted Scat (Scatophagus argus) in the Mangrove Estuary of the Matang Mangrove Forest Reserve, Malaysia, Estimated by Stable Isotope Analysis

JARQ : Japan Agricultural Research Quarterly
本文フルテキスト

Stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) were determined for the spotted scat (Scatophagus argus) in the Matang Mangrove Forest Reserve in Peninsular Malaysia. The ratios from fish samples along with those obtained from samples of their potential food items (i.e., mangrove leaves in the estuary, coastal phytoplankton, microphytobenthos) revealed wide variations, indicating that S. argus utilizes various food items between the coastal area at the river mouth to the inner mangrove estuary. The carbon isotope ratio in the fish body tended to be lower in fish sampled from the inner estuary as compared with fish at the river mouth. The carbon isotope ratio values of the fish body were relatively high in small fish (< 20 mm in total length [TL]) but lower in fish of 20–100 mm TL, and relatively higher in fish > 100 mm TL. These findings strongly suggest that small-sized S. argus (< 20 mm TL) migrate from the outer coastal area into the mangrove estuary and utilize the mangrove estuary habitat as their nursery grounds before eventually returning to the river-mouth area as their growth progresses.

刊行年月2020-04-01
作成者Shinsuke MORIOKAKatsuhisa TANAKATatsuya YURIMOTOFaizul M. KASSIMKazumaro OKAMURA
著者キーワードstable carbon/nitrogen isotope ratiosmangrove estuaryfish nursery groundmigration
公開者Japan International Research Center for Agricultural Sciences
データ作成日2020-04-01
受理日2019-08-19
受領日2018-07-04
54
2
開始ページ193
終了ページ199
DOI10.6090/jarq.54.193
言語eng