Abstract
Populations of anemonefish species often show signs of local isolation due to limited dispersal potential and oceanographic conditions. Additionally, anthropogenic pressure, such as overharvesting and coral reef exploitation causes reduced population size, eventually leading to local extinction. The understanding of the genetic population structure, as well as the influence of both historical and current connectivity, is required to design effective marine protected area (MPA) networks. In this study, the genetic structure of Clark’s Anemonefish (Amphiprion clarkii) based on 209 individuals from 16 samples sites in the Indo-Malay Archipelago (IMA) is assessed through mitochondrial control region (mtCR) sequences and eight nuclear microsatellite loci. Results provided evidence of a significant genetic structure (mtCR: Φst = 0.42, Φct = 0.64; microsatellites: Fst = 0.01, Fct = 0.05). Genetic breaks were identified among Western (Padang Karimunjawa), Central (Sulawesi, Borneo, Bali, Komodo, Timor) and Eastern (Biak) IMA populations, with almost no gene flow. This matches with patterns obtained for congeneric and other coral reef taxa. Due to the restricted connectivity among these three regions, it is suggested to consider them as separate management areas in the design of MPA networks.
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Acknowledgements
We would like to thank the Erasmus Mundus Masters Course “TROPIMUNDO” for granting a master thesis scholarship to H.D.; the German Federal Ministry of Education and Research (BMBF, Grant Nos. 03F0390B, 03F0472B and 03F0643B) for funding in the framework of the German-Indonesian project “Science for the Protection of Indonesian Coastal Ecosystems (SPICE)”; D. Blohm (Universität Bremen, Germany) for support and sub-project coordination; Leibniz Centre for Tropical Marine Research (Bremen, Germany) for support, cooperation, and project coordination; J. Jompa, scientists and students of the Hasanuddin University (Makassar, Indonesia) for logistics and help during field work; the competent Indonesian authorities for permits. The SPICE project was conducted and permitted under the governmental agreement between the BMBF and the Indonesian Ministry for Research and Technology (RISTEK), Indonesian Institute of Sciences (LIPI), Indonesian Ministry of Maritime Affairs and Fisheries (DKP) and Indonesian Agency for the Assessment and Application of Technology (BPPT). We also thank two anonymous reviewers for their comments and corrections.
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Ducret, H., Timm, J., Rodríguez-Moreno, M. et al. Strong genetic structure and limited connectivity among populations of Clark’s Anemonefish (Amphiprion clarkii) in the centre of marine biodiversity. Coral Reefs 41, 599–609 (2022). https://doi.org/10.1007/s00338-021-02205-8
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DOI: https://doi.org/10.1007/s00338-021-02205-8