scholarly journals Chemical effects of macroalgae on larval settlement of the broadcast spawning coral Acropora millepora

2008 ◽  
Vol 362 ◽  
pp. 129-137 ◽  
Author(s):  
CL Birrell ◽  
LJ McCook ◽  
BL Willis ◽  
L Harrington
Keyword(s):  
Larval Settlement ◽  
Broadcast Spawning ◽  
Acropora Millepora ◽  
Chemical Effects

scholarly journals High potential for formation and persistence of chimeras following aggregated larval settlement in the broadcast spawning coral, Acropora millepora

2011 ◽  
Vol 279 (1729) ◽  
pp. 699-708 ◽  
Author(s):  
E. Puill-Stephan ◽  
M. J. H. van Oppen ◽  
K. Pichavant-Rafini ◽  
B. L. Willis
Keyword(s):  
Marine Invertebrates ◽  
Larval Settlement ◽  
Early Life History ◽  
Experimental Conditions ◽  
Broadcast Spawning ◽  
Acropora Millepora ◽  
Reef Corals ◽  
Life History Stages ◽  
Potential Benefits ◽  
High Level

In sessile modular marine invertebrates, chimeras can originate from fusions of closely settling larvae or of colonies that come into contact through growth or movement. While it has been shown that juveniles of brooding corals fuse under experimental conditions, chimera formation in broadcast spawning corals, the most abundant group of reef corals, has not been examined. This study explores the capacity of the broadcast spawning coral Acropora millepora to form chimeras under experimental conditions and to persist as chimeras in the field. Under experimental conditions, 1.5-fold more larvae settled in aggregations than solitarily, and analyses of nine microsatellite loci revealed that 50 per cent of juveniles tested harboured different genotypes within the same colony. Significantly, some chimeric colonies persisted for 23 months post-settlement, when the study ended. Genotypes within persisting chimeric colonies all showed a high level of relatedness, whereas rejecting colonies displayed variable levels of relatedness. The nearly threefold greater sizes of chimeras compared with solitary juveniles, from settlement through to at least three months, suggest that chimerism is likely to be an important strategy for maximizing survival of vulnerable early life-history stages of corals, although longer-term studies are required to more fully explore the potential benefits of chimerism.

scholarly journals Coral larvae for restoration and research: a large-scale method for rearing Acropora millepora larvae, inducing settlement, and establishing symbiosis

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3732 ◽  
Author(s):  
F. Joseph Pollock ◽  
Sefano M. Katz ◽  
Jeroen A.J.M. van de Water ◽  
Sarah W. Davies ◽  
Margaux Hein ◽  
...  
Keyword(s):  
Large Scale ◽  
Larval Settlement ◽  
Larval Survival ◽  
Coralline Algae ◽  
Larval Rearing ◽  
Crustose Coralline Algae ◽  
Minimal Impact ◽  
Acropora Millepora ◽  
Wide Range ◽  
Order Of Magnitude

Here we describe an efficient and effective technique for rearing sexually-derived coral propagules from spawning through larval settlement and symbiont uptake with minimal impact on natural coral populations. We sought to maximize larval survival while minimizing expense and daily husbandry maintenance by experimentally determining optimized conditions and protocols for gamete fertilization, larval cultivation, induction of larval settlement by crustose coralline algae, and inoculation of newly settled juveniles with their dinoflagellate symbiont Symbiodinium. Larval rearing densities at or below 0.2 larvae mL−1 were found to maximize larval survival and settlement success in culture tanks while minimizing maintenance effort. Induction of larval settlement via the addition of a ground mixture of diverse crustose coralline algae (CCA) is recommended, given the challenging nature of in situ CCA identification and our finding that non settlement-inducing CCA assemblages do not inhibit larval settlement if suitable assemblages are present. Although order of magnitude differences in infectivity were found between common Great Barrier Reef Symbiodinium clades C and D, no significant differences in Symbiodinium uptake were observed between laboratory-cultured and wild-harvested symbionts in each case. The technique presented here for Acropora millepora can be adapted for research and restoration efforts in a wide range of broadcast spawning coral species.

Allorecognition maturation in the broadcast-spawning coral Acropora millepora

Coral Reefs ◽  
2012 ◽  
Vol 31 (4) ◽  
pp. 1019-1028 ◽  
Author(s):  
E. Puill-Stephan ◽  
B. L. Willis ◽  
D. Abrego ◽  
J.-B. Raina ◽  
M. J. H. van Oppen
Keyword(s):  
Broadcast Spawning ◽  
Acropora Millepora

scholarly journals Chimerism in Wild Adult Populations of the Broadcast Spawning Coral Acropora millepora on the Great Barrier Reef

PLoS ONE ◽  
2009 ◽  
Vol 4 (11) ◽  
pp. e7751 ◽  
Author(s):  
Eneour Puill-Stephan ◽  
Bette L. Willis ◽  
Lynne van Herwerden ◽  
Madeleine J. H. van Oppen
Keyword(s):  
Great Barrier Reef ◽  
Barrier Reef ◽  
Broadcast Spawning ◽  
Acropora Millepora

Lunar Phase Modulates Circadian Gene Expression Cycles in the Broadcast Spawning Coral Acropora millepora

2016 ◽  
Vol 230 (2) ◽  
pp. 130-142 ◽  
Author(s):  
Aisling K. Brady ◽  
Bette L. Willis ◽  
Lawrence D. Harder ◽  
Peter D. Vize
Keyword(s):  
Gene Expression ◽  
Lunar Phase ◽  
Circadian Gene ◽  
Broadcast Spawning ◽  
Acropora Millepora

scholarly journals Differences in genetic diversity and divergence between brooding and broadcast spawning corals across two spatial scales in the Coral Triangle region

2021 ◽  
Vol 168 (2) ◽  
Author(s):  
Rosa Maria van der Ven ◽  
Hanneloor Heynderickx ◽  
Marc Kochzius
Keyword(s):  
Genetic Diversity ◽  
Spatial Scales ◽  
Allelic Diversity ◽  
Marine Biodiversity ◽  
Coral Triangle ◽  
Broadcast Spawning ◽  
Acropora Millepora ◽  
Dispersal Barriers ◽  
Seriatopora Hystrix ◽  
Spermonde Archipelago

AbstractThe Coral Triangle region contains the world’s highest marine biodiversity, however, these reefs are also the most threatened by global and local threats. A main limitation that prevents the implementation of adequate conservation measures is that connectivity and genetic structure of populations is poorly known. The aim of this study was to investigate the genetic diversity, population structure and connectivity patterns of tropical corals in Indonesia on two different spatial scales, as well as by comparing two different reproduction strategies. Genotyping was based on microsatellite markers for 316 individual Seriatopora hystrix colonies and 142 Acropora millepora colonies sampled in Pulau Seribu and Spermonde Archipelago in 2012 and 2013. Differences in allelic diversity and a strong signature of divergence associated with historical land barriers at the Sunda Shelf were found for the brooding coral Seriatopora hystrix. However, differences in diversity and divergence were not pronounced in the broadcast spawning coral Acropora millepora. Within Spermonde Archipelago, two groups were identified: (1) sites of the sheltered inner-shelf and mid-shelf, which were found to be highly interconnected and (2) mid-shelf and outer-shelf sites characterised by higher differentiation. These patterns of contemporary dispersal barriers and genetic diversity can be explained by the differences in life history of the corals, as well as by oceanographic conditions facilitating larval dispersal. The contemporary dispersal barriers found within the Spermonde Archipelago emphasise the need for incorporating connectivity data in future conservation efforts.

scholarly journals Tradeoffs to Thermal Acclimation: Energetics and Reproduction of a Reef Coral with Heat TolerantSymbiodiniumType-D

2011 ◽  
Vol 2011 ◽  
pp. 1-12 ◽  
Author(s):  
Alison M. Jones ◽  
Ray Berkelmans
Keyword(s):  
Reef Coral ◽  
Bleaching Event ◽  
Larval Duration ◽  
Negative Effects ◽  
Broadcast Spawning ◽  
Acropora Millepora ◽  
Reef Corals ◽  
Type D ◽  
Tropical Reefs ◽  
Spawning Time

The photo-physiological characteristics of thermo-tolerantSymbiodiniumtypes have been postulated to have negative effects on the energetics of the reef corals by reducing fitness. To investigate this, two key and inextricably coupled indicators of fitness, lipids and reproduction, were monitored in colonies of the broadcast-spawning coralAcropora milleporaover a two-year period that included a natural bleaching event. In the absence of bleaching ITS1-type clade D predominant colonies had 26% lower stored lipids compared to C2 colonies. At spawning time, this correlated with 28% smaller eggs in type-D colonies. This energetic disparity is expected to have reduced larval duration and settlement-competency periods in type-D compared to type-C2 colonies. More importantly, irrespective of the effect of genotype, the fitness of all corals was adversely affected by the stress of the bleaching event which reduced prespawning lipids by 60% and halved the number of eggs compared to the previous year. Our results extend work that has shown that direct temperature stress and symbiont change are likely to work in concert on corals by demonstrating that the lipids and reproduction of the reef building corals on tropical reefs are likely to be impaired by these processes as our climate warms.

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