Fine-scale analysis of genetic structure in the brooding coral Seriatopora hystrix from the Red Sea |
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Authors: | E. Maier R. Tollrian B. Nürnberger |
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Affiliation: | (1) Department Biologie II, Ludwig-Maximilians-Universit?t (LMU), Gro?haderner Stra?e 2, 82152 Planegg-Martinsried, Germany;(2) Lehrstuhl für Evolutions?kologie und Biodiversit?t der Tiere, Ruhr-Universit?t Bochum, Universit?tsstra?e 150, 44780 Bochum, Germany;(3) Present address: 19 Gillespie Crescent, Edinburgh, EH10 4HU, UK |
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Abstract: | The dispersal of gametes and larvae plays a key role in the population dynamics of sessile marine invertebrates. Species with internal fertilisation are often associated with very localised larval dispersal, which may cause small-scale patterns of neutral genetic variation. This study on the brooding coral Seriatopora hystrix from the Red Sea focused on the smallest possible scale: Two S. hystrix stands (~100 colonies each) near Dahab were completely sampled, mapped and analysed at five microsatellite markers. The sexual mode of reproduction, the likely occurrence of selfing and the level of immigration were in agreement with previous studies on this species. Contrary to previous findings, both stands were in Hardy–Weinberg proportions. Also, no evidence for spatially restricted larval dispersal within the sampled areas was found. Differences between this and previous studies on S. hystrix could reflect variation in life history or varying environmental conditions, which opens intriguing questions for future research. |
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Keywords: | Assignment tests Coral Larval dispersal Microsatellite Selfing Seriatopora hystrix |
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