11th ICRS Abstract book - Nova Southeastern University
11th ICRS Abstract book - Nova Southeastern University
11th ICRS Abstract book - Nova Southeastern University
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14.445<br />
The Swimming Ability And Behaviour Of Coral Larval: How These Affect<br />
Retention And Dispersion?<br />
Valeria PIZARRO* 1 , Jeremy C. THOMASON 2<br />
1 Universidad de Bogota Jorge Tadeo Lozano, Bogotá, D.C., Colombia, 2 School of<br />
Biology, Newcastle <strong>University</strong>, Newcastle upon Tyne, United Kingdom<br />
In general, marine larvae have a free-swimming phase before settling. This phase could<br />
be playing an important role on retention, dispersion, and connectivity between<br />
populations between others. Until recently, it was thought that coral larvae swimming<br />
capabilities were so poor that currents advected them as passive particles. Nowadays it is<br />
accepted that coral larvae can control their position in the water column avoiding<br />
advection. This study aims to describe Montastraea annularis and M. faveolata larvae<br />
swimming capabilities and changes in swimming behaviour with age, and how these<br />
could affect retention and/or dispersion from parental reefs. Coral larvae observations<br />
were made following Stake and Sammarco (2003) methods. Three planulae from each<br />
species were observed daily, and vertical position, swimming velocity, and qualitative<br />
observations of swimming behaviour were recorded every five minutes. GLM ANOVA<br />
analyses were used to determine the effects of the age on the velocity and depth for each<br />
response variable. The effect of age on planulae behaviour a binomial logistic regression<br />
analysis was performed. Obtained results shown the capability of larvae to alternate<br />
swimming pattern, velocity and depth which then enables them to explore suitable<br />
substrata for settlement. This capability also contributes to dispersal away from natal<br />
reefs by controlling their position in the water column, and may determine adult<br />
distributions on reefs. Additionally, we found, for the first time 1) swimming velocity and<br />
depth varied with age only for M. annularis; and, 2) the probability of settlement<br />
increased with age for M. annularis and M. faveolata<br />
14.446<br />
Population Structure Of The Mediterranean Solitary Coral balanophyllia<br />
Europaea<br />
Jillian MANSFIELD* 1 , Stefano GOFFREDO 2 , Mary Alice COFFROTH 3<br />
1 2 3<br />
<strong>University</strong> at Buffalo, Oswego, NY, <strong>University</strong> of Bologna, Bologna, Italy, <strong>University</strong><br />
at Buffalo, Buffalo, NY<br />
Balanophyllia europaea is a simultaneous hermaphroditic, brooding coral species, and is<br />
endemic to the Mediterranean Sea. The population structure and biogeography of B.<br />
europaea were determined for eight populations found in the Mediterranean Basin around<br />
Italy. Population genetic theory predicts that if B. europaea is a hermaphrodite, it will<br />
self-fertilize frequently leading to inbreeding and a significant deficit of heterozygotes in<br />
the populations. Three microsatellite loci were used to test this hypothesis; and the<br />
hypothesis that the swimming, pelagic larvae of this brooder coral will produce<br />
significant gene flows within small spatial scales causing populations at large scales to be<br />
genetically structured. Preliminary results of this study do seem to support these<br />
hypotheses; however, more analyses and the creation of several new polymorphic loci are<br />
required to fully support these hypotheses and will be carried out in the near future and<br />
reported in a subsequent paper.<br />
Poster Mini-Symposium 14: Reef Connectivity<br />
14.447<br />
Strong Genetic Structure Of The Widespread Coral acropora Hyacinthus in The<br />
Peripheral Region Of Indo-Pacific Reefs<br />
Go SUZUKI* 1,2 , Takeshi HAYASHIBARA 3 , Yoshihisa SHIRAYAMA 2 , Hironobu FUKAMI 2<br />
1 Division of Applied Biosciences, Graduate School of Agriculture, Kyoto <strong>University</strong>, Kyoto,<br />
Japan, 2 Seto Marine Biological Laboratory, Field Science Education and Research Center,<br />
Kyoto <strong>University</strong>, Wakayama, Japan, 3 Ishigaki Tropical Station, Seikai National Fisheries<br />
Research Institute, Ishigaki, Japan<br />
Genetic variations in marine organisms with high dispersal potential of larvae are generally low<br />
especially within a region subject to strong ocean current. However, a difference in the genetic<br />
composition of the temperate and subtropical populations of tabular coral Acropora hyacinthus<br />
(one of the most common corals in the Indo-Pacific reefs) was found, despite the presence of<br />
the Kuroshio current in this region. Phylogenetic analysis using a mitochondrial DNA marker<br />
showed that intra-specific genetic variations were as large as that among 14 other congeneric<br />
species, and the variations were classified into four haplotype groups (Hya A–D). Notably, each<br />
group was disproportionately distributed: HyaA and B were mainly distributed in the temperate<br />
region, HyaD was mainly distributed in the subtropical region, and HyaC dominated in both<br />
regions. Crossbreeding experiments showed no gametic isolation among the colonies with these<br />
haplotype groups, simultaneous spawning was observed during the experiments, and sympatric<br />
distribution of all groups was verified in the field, indicating the four haplotype groups belong<br />
to a single species with high genetic polymorphism. Nested clade analysis revealed the<br />
existence of a geographical association between HyaA and D. Considering the geological and<br />
genetic data, we hypothesize that a vicariant event such as a lowering of the sea level during<br />
glacial periods may have isolated peripheral (temperate) A. hyacinthus populations from the<br />
core subtropical ones. Recent connection between the populations (based on the presence of<br />
HyaC) may be due to the Kuroshio current, which would transport A. hyacinthus larvae from<br />
subtropical to temperate populations. Focusing on peripheral/temperate populations has the<br />
potential to improve our understanding of the evolutional history of corals.<br />
14.448<br />
Population Structure Of The Redbelly Yellow Tail Fusilier, Caesio Cuning, (Perciformes,<br />
Lutjanidae)<br />
Sinta PARDEDE 1 , Paul BARBER* 2 , Kent CARPENTER 3<br />
1 Indonesia Marine Program, Wildlife Conservation Society, Bogor, Indonesia, 2 Biology, Boston<br />
<strong>University</strong> Marine Program, Boston, MA, 3 Biological Sciences, Old Dominion <strong>University</strong>,<br />
Norfolk, VA<br />
Studies examining patterns of regional genetic subdivision in Indonesia report many regional<br />
barriers to gene flow. However, these have focused on species with pelagic or demersal life<br />
history. Caesio cuning is a mid-water reef fish that combines aspects of demersal and pelagic<br />
life histories. This study examines genetic connectivity among C. cuning populations<br />
throughout Indonesia to understand the genetic impact of its intermediate life history. A total of<br />
380 base pairs of the mitochondrial control region were collected from 323 individual fish,<br />
representing 18 study sites in Indonesia. Results from AMOVA indicated pronounced genetic<br />
structure among populations east and west of the Sunda Shelf (FST=0.4827 (p< 0.0001),<br />
suggesting Pleistocene vicariance between Indian and Pacific Ocean populations. Although<br />
pair-wise analysis of gene flow shows similar results with Medan and Raja Ampat exhibiting<br />
limited genetic exchange with most of the other populations. fine-scale genetic structure was<br />
also found throughout the Indonesian Archipelago, suggesting additional limits to genetic<br />
connectivity. In particular, results suggest that populations from the Java region are<br />
significantly isolated from populations in Northern Sulawesi and most of Eastern Indonesia.<br />
Overall, genetic patterns in C. cuning are more similar to demersal reef fish than to pelagics,<br />
suggesting that this species does not disperse broadly.<br />
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