caa a22 4500 445820187 CHVBK 20180317145241.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s00338-011-0727-5 doi (NATIONALLICENCE)springer-10.1007/s00338-011-0727-5 Larval behaviour and settlement cues of a brooding coral reef sponge [Elektronische Daten] [M. Abdul Wahab, R. de Nys, S. Whalan] Patterns of larval release, dispersal and settlement in sponges are poorly understood despite their significance in explaining adult ecology. Time of release, swimming speeds, phototaxis and vertical migration were quantified for larvae of the dictyoceratid sponge Coscinoderma matthewsi. The influence of cues associated with biofilms and coral rubble on larval settlement and metamorphosis was also measured. C. matthewsi is a brooding sponge and releases tufted parenchymellae larvae during the day. Upon release, larvae (>90%) have no phototactic response, maintaining their position at the water surface for 80min±0 (mean±SE) regardless of a light cue (natural daylight) before exhibiting negative phototaxis. At 28h post-release, the majority of larvae (94.7%±6.1) exposed to light from the surface migrated to the bottom and assumed a demersal phase. Without light, larvae occupied the surface for up to 28h post-release (89.3%±1.8) before migrating to the bottom. Larvae did not settle gregariously and began to settle and metamorphose after 28h post-release without a cue. Settlement and metamorphosis were faster in the presence of a biofilm (settlement=15.0%±8.7 and metamorphosis=12.5%±9.5 at 28h post-release), while the addition of coral rubble accelerated metamorphosis further (settlement=10.0%±4.1 and metamorphosis=27.5%±10.3 at 28h post-release) compared to controls (sterile surfaces) (settlement=0% and metamorphosis=0% at 28h post-release). However, both biofilms and coral rubble decrease total metamorphosis (control=92.5%±4.8, biofilms=67.5%±7.5 and coral rubble=55.0%±13.2) due to mortality after 76h post-release. Springer-Verlag, 2011 Dispersal nationallicence Phototaxis nationallicence Metamorphosis nationallicence Recruitment nationallicence Porifera nationallicence Abdul Wahab M. School of Marine and Tropical Biology, James Cook University, 4811, Townsville, QLD, Australia aut de Nys R. School of Marine and Tropical Biology, James Cook University, 4811, Townsville, QLD, Australia aut Whalan S. School of Marine and Tropical Biology, James Cook University, 4811, Townsville, QLD, Australia aut Coral Reefs Springer-Verlag 30/2(2011-06-01), 451-460 0722-4028 30:2<451 2011 30 338 https://doi.org/10.1007/s00338-011-0727-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00338-011-0727-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Abdul Wahab M. School of Marine and Tropical Biology, James Cook University, 4811, Townsville, QLD, Australia aut NATIONALLICENCE 700 1- de Nys R. School of Marine and Tropical Biology, James Cook University, 4811, Townsville, QLD, Australia aut NATIONALLICENCE 700 1- Whalan S. School of Marine and Tropical Biology, James Cook University, 4811, Townsville, QLD, Australia aut NATIONALLICENCE 773 0- Coral Reefs Springer-Verlag 30/2(2011-06-01), 451-460 0722-4028 30:2<451 2011 30 338 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer