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Title :Repetitive sex change in the stony coral Herpolitha limax across a wide geographic range
Authors :Eyal-Shaham, Lee
Eyal, Gal
Sakai, Kazuhiko
Nozawa, Yoko
Harii, Saki
Sinniger, Frederic
Bronstein, Omri
Ben-Zvi, Or
Shlesinger, Tom
Loya, Yossi
Issue Date :27-Feb-2019
Abstract :Sex change has been widely studied in animals and plants. However, the conditions favoring sex change, its mode and timing remain poorly known. Here, for the first time in stony corals, we report on a protandrous (youngest individuals are males) repetitive sex change exhibited by the fungiid coral Herpolitha limax across large spatial scales (the coral reefs of Japan, Jordan and Israel) and temporal scales (2004–2017). In contrast to most corals, this species is a daytime spawner (08:00–10:00 AM) that spawned at the same time/same date across all the study sites. The sporadically scattered populations of H. limax among the coral reefs of Eilat (Israel) and Aqaba (Jordan) exhibited significantly slower growth, earlier sex change, and lower percentages of reproduction and sex change in comparison to the densely aggregated populations in Okinawa (Japan). At all sites, sex ratio varied among years, but was almost always biased towards maleness. Growth rate decreased with size. We conclude that comparable to dioecious plants that display labile sexuality in response to energetic and/or environmental constraints, the repetitive sex change displayed by H. limax increases its overall fitness reinforcing the important role of reproductive plasticity in the Phylum Cnidaria in determining their evolutionary success.
URL :https://doi.org/10.1038/s41598-018-37619-y
Type Local :雑誌掲載論文
ISSN :2045-2322
Publisher :Springer Nature
URI :http://hdl.handle.net/20.500.12000/47253
Citation :Scientific Reports Vol.9
Appears in Collections:Peer-reviewed Journal Articles(Tropical Biosphere Research Center)

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