caa a22 4500 445891017 CHVBK 20180317145616.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s10750-011-0771-8 doi (NATIONALLICENCE)springer-10.1007/s10750-011-0771-8 Diel timing of planulation and larval settlement in the coral Isopora cuneata (Scleractinia: Acroporidae) [Elektronische Daten] [Ronald Villanueva, Maria Baria, Dexter dela Cruz, Romeo Dizon] The prevailing environmental conditions when reproductive products are released in the water column can have a profound influence on the biology and ecology of marine organisms. In reef-building corals, brooding species that release azooxanthellate larvae are expected to release their larvae before sunrise, similar to species releasing zooxanthellate larvae as established in previous studies. This study investigated the diel timing of release of asymbiotic larvae by Isopora cuneata in northwestern Philippines during 2years through ex situ observations on gravid colonies collected from the reef. Planulation mainly occurred after sunset until midnight, with grand mean hour of release at 19:35h (95% confidence limit: 18:44-21:02h) in April 2010 and 19:41h (18:10-20:59h) in March 2011. This pattern of release timing is distinct from what has been previously reported for brooding scleractinian coral species with zooxanthellate larvae (i.e., release close to sunrise). The release coincides with the low tidal stand, which may provide opportunity for the prompt settlement of newly released, buoyant larvae to shallow reef areas where adult colonies are generally distributed. The larvae were able to settle with 20±25% success within a day of release, though a distinct settlement peak at 3days post-release (70±25%). This study provides new information on the early life strategies of the reef-building coral Isopora cuneata. The unique pattern of larval release time and the settlement behavior may influence the population dynamics and success of the species through space and time. Springer Science+Business Media B.V., 2011 Cnidaria nationallicence Philippines nationallicence Brooder nationallicence Larval release nationallicence Settlement nationallicence Villanueva Ronald The Marine Science Institute, College of Science, University of the Philippines Diliman, 1101, Quezon City, Philippines aut Baria Maria The Marine Science Institute, College of Science, University of the Philippines Diliman, 1101, Quezon City, Philippines aut dela Cruz Dexter The Marine Science Institute, College of Science, University of the Philippines Diliman, 1101, Quezon City, Philippines aut Dizon Romeo Department of Biology, College of Science, University of the Philippines—Baguio, 2600, Baguio City, Philippines aut Hydrobiologia Springer Netherlands 673/1(2011-09-01), 273-279 0018-8158 673:1<273 2011 673 10750 https://doi.org/10.1007/s10750-011-0771-8 text/html Onlinezugriff via DOI 1 brief-communication jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-011-0771-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Villanueva Ronald The Marine Science Institute, College of Science, University of the Philippines Diliman, 1101, Quezon City, Philippines aut NATIONALLICENCE 700 1- Baria Maria The Marine Science Institute, College of Science, University of the Philippines Diliman, 1101, Quezon City, Philippines aut NATIONALLICENCE 700 1- dela Cruz Dexter The Marine Science Institute, College of Science, University of the Philippines Diliman, 1101, Quezon City, Philippines aut NATIONALLICENCE 700 1- Dizon Romeo Department of Biology, College of Science, University of the Philippines—Baguio, 2600, Baguio City, Philippines aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 673/1(2011-09-01), 273-279 0018-8158 673:1<273 2011 673 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer