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      Facultative amphidromy and pelagic larval duration plasticity of Rhinogobius formosanus (Teleostei, Gobioidei)

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          Abstract

          Rhinogobius formosanus Oshima, 1919 has long been considered an amphidromous goby. However, a landlocked population recently found in the Jingualiao Creek upstream of the Feitsui Reservoir in Taipei suggests that R. formosanus may complete its life in the river. This study aims to verify the habitat use of the landlocked population of R. formosanus collected from the Feitsui Reservoir and an amphidromous population collected in Malian Creek using otolith Sr:Ca ratio analysis. The hypothesis that early life history varies between the landlocked and migratory gobies was also tested. Genetic analyses show that the Feitsui Reservoir and Malian Creek populations are not genetically different. Rhinogobius formosanus from Malian Creek showed high-to-low otolith Sr:Ca ratios suggesting that these specimens spent a planktonic larval stage in the sea followed by a freshwater life at later stages. In contrast, R. formosanus from the Feitsui Reservoir showed constant lower otolith Sr:Ca ratios, implying a landlocked life history of fish in the creek upstream of the reservoir. In addition, the analysis of growth increments showed a longer pelagic larval duration for the fish in the Malian Creek (58.8 days) than those in the Feitsui Reservoir (38.8). Variation of pelagic larval duration in two genetically homogenous populations implies acclimatization to the reservoir by the landlocked gobies. This study shows that R. formosanus , like some other congeners, is capable of adapting to a freshwater landlocked environment in its early developmental stage and supports the hypothesis that landlocked populations may have a shorter pelagic larval duration.

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          Most cited references 42

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          Microstructure of Fish Otoliths

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            Marine connectivity: a new look at pelagic larval duration and genetic metrics of dispersal

             KA Selkoe,  RJ Toonen (2011)
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              Interactive effects of temperature and salinity on otolith chemistry: challenges for determining environmental histories of fish

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                Author and article information

                Contributors
                Journal
                Zookeys
                Zookeys
                2
                urn:lsid:arphahub.com:pub:45048D35-BB1D-5CE8-9668-537E44BD4C7E
                urn:lsid:zoobank.org:pub:91BD42D4-90F1-4B45-9350-EEF175B1727A
                ZooKeys
                Pensoft Publishers
                1313-2989
                1313-2970
                2020
                22 July 2020
                : 951
                : 91-107
                Affiliations
                [1 ] Department of Oceanography, National Sun Yat-sen University, Kaohsiung 804, Taiwan
                [2 ] Doctoral Degree Program in Marine Biotechnology, National Sun Yat-sen University, Kaohsiung 804, Taiwan
                [3 ] Doctoral Degree Program in Marine Biotechnology, Academia Sinica, Taipei 115, Taiwan
                [4 ] Institute of Earth Sciences, Academia Sinica, Taipei 115, Taiwan
                [5 ] Printech Electronics Corporation, New Taipei 235, Taiwan
                [6 ] Institute of Oceanography, National Taiwan University, Taipei 106, Taiwan
                Author notes
                Corresponding author: Jen-Chieh Shiao ( jcshiao@ 123456ntu.edu.tw )

                Academic editor: N. Bogutskaya

                Article
                50429
                10.3897/zookeys.951.50429
                7390802
                Te-Yu Liao, Wen-Chien Huang, Yoshiyuki Iizuka, Ming-Tai Chou, Jen-Chieh Shiao

                This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                Categories
                Research Article
                Actinopterygii
                Biodiversity & Conservation
                Biogeography
                Ecology & Environmental sciences
                Asia

                Animal science & Zoology

                landlocked, otolith, goby, coi sequences, diadromous

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