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- W1978393960 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 358:245-256 (2008) - DOI: https://doi.org/10.3354/meps07300 Migration of Japanese temperate bass Lateolabrax japonicus juveniles within the Chikugo River estuary revealed by δ13C analysis Keita W. Suzuki1,*, Akihide Kasai1, Taro Ohta2, Kouji Nakayama3, Masaru Tanaka3 1Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan 2Tottori Prefectural Fisheries Research Center, Ishiwaki, Yurihama-cho, Tottori 689-0602, Japan 3Field Science Education and Research Center, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan *Email: keita@kais.kyoto-u.ac.jp ABSTRACT: With conventional techniques it is difficult to evaluate the nursery value for migratory juveniles of Japanese temperate bass Lateolabrax japonicus within the Chikugo River estuary in Japan, especially in lower salinity areas where highly abundant prey organisms are distributed. In the present study stable carbon isotope ratios (δ13C) were used as a migration tracer within the estuary. Based on preparatory information from diet-switch experiments and field observations of prey organisms, the ranges on which tissue δ13C values of juveniles should converge (convergence range) were determined in lower and higher salinity areas (LSA salinity < 10, HSA salinity > 10). For early juveniles, muscle δ13C values were analyzed and ages were determined by otolith increment counts. For more developed juveniles δ13C values were analyzed in muscle and liver, whose half-life values were 11.4 and 2.9 d, respectively. Temporal patterns of migration were estimated by comparing δ13C values in muscle and liver with the convergence ranges of both LSA and HSA. Early juveniles aggregated around the river mouth in March 2003 and the majority gradually ascended the river to LSA by April. Most of them stayed in LSA until August, while some began to expand their home ranges to HSA after July. In addition, it is suggested that the timing of ascent influenced the early growth of juveniles. Consequently, the potential importance of LSA was demonstrated during the first growth season of Japanese temperate bass in the estuary. KEY WORDS: Migration · Stable isotopes · Estuary · Salinity · Fish · Muscle · Liver · Otolith Full text in pdf format PreviousNextCite this article as: Suzuki KW, Kasai A, Ohta T, Nakayama K, Tanaka M (2008) Migration of Japanese temperate bass Lateolabrax japonicus juveniles within the Chikugo River estuary revealed by δ13C analysis. Mar Ecol Prog Ser 358:245-256. https://doi.org/10.3354/meps07300 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 358. Online publication date: April 21, 2008 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2008 Inter-Research." @default.
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- W1978393960 title "Migration of Japanese temperate bass Lateolabrax japonicus juveniles within the Chikugo River estuary revealed by δ13C analysis" @default.
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