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Fragment growth-rates of six cultivated coral species:a reference framework for coral transplantation

机译：Fragment growth-rates of six cultivated coral species:a reference framework for coral transplantation

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Coral fragmentation is a natural process of asexual reproduction in many coral species. Fragment size is believed to be an important factor of fragment survival at least in some species. The degradation of coral reefs and its poor recovery in some localities had brought different management plans in coral transplantation. In this study we examined in controlled conditions the variation in fragment growth rates of six different scleractinian species belonging to two different growth forms. We showed that fragment growth rates increased over our 6 month survey and that Pocillopora damicornis exhibited the highest growth rate followed in decreasing order by S. pistillata, Montipora sp., S. caliendrum, Echinopora sp., and T. reniformis which may reflects their life history strategy, but also a difference in their surface-to-volume ratio as well as a difference in their skeletal density. Then, for each species, we determined whether growth rates might be affected by fragment size. We showed that there was a positive significant relationship between growth rate and fragment size, depending, however, on the interval time and the species considered. Difference in physiological resources allocation through a colony lifetime and genetic limitations in colony size may be related to our results. However, as in the wild many other parameters such as predation, can also play a role in fragment survivorship, we suggested that fragment size is an important parameter to take into account to successfully recover local coral population.

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