par Vanegas Gonzalez, Maria Juliana 
Promoteur Tan, Chung-Hong
Co-Promoteur Flot, Jean-François
;Bachok, Zainudin
Publication Non publié, 2021-08-31
Promoteur Tan, Chung-Hong
Co-Promoteur Flot, Jean-François
;Bachok, ZainudinPublication Non publié, 2021-08-31
Mémoire
| Résumé : | Coralsynchronousspawningeventsarecriticaltothefutureofthecoralreefs,especiallyforbroadcastingspeciesas Acropora spp. Theincreasinginterestinthisphenomenonaroundtheworldhas enabledthepredictionofreproductiontimingandhasrevealedtheexistenceofmorethanoneevent peryearinsomereefs.However,forMalaysiathisaspectofthecoralbiologyremainspoorlystudied. Here,weevaluatedthespawningseasonalityofdifferentspeciesofthegenus Acropora inPulau Bidong(Malaysia),byassessingfecundityandoocytefeatures,andbydelimitingthespeciesparticipantineacheventusingmorphologyandmolecularevidences.Theresultsshowedtheoccurrenceoftwospawningevents,oneinAprilandoneinOctober,withdifferentspeciestakingpartineachone.Thefecunditydifferedbetweenthesevenmorphospeciesidentified,howeverthosedifferences werenotassociatedwiththespawningmonth.Themolecularevidenceshowedthatthespeciespresentinbotheventsweredifferent,howeverdidnotallowustodefinetheidentityinsome cases.ThenuclearmarkersPaxCandCalmodulinshowedtheexistenceofgeneticdifferenceswithin morphospecies,andthesedifferenceswereassociatedwiththeirreproductiontime.ThisworksuggeststhatinPulauBidongtherearetwomulti-specificspawningeventswithdifferentAcropora speciesparticipatingineach.Finally,itsupportsthepremisethatintegrativestudieswithmorphological,biologicalandgeneticinformationneedtobedevelopedtobetterunderstandthedynamics ofthecoralcommunitiesinMalaysiatodevelopeffectiveconservationstrategies. |
