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4 results for “Plectropomus leopardus”
Data from: Demographic histories shape population genomics of the common coral grouper (Plectropomus leopardus)
<p>Many coral reef fishes display remarkable genetic and phenotypic variation across their geographic ranges. Understanding how historical and contemporary processes have shaped these patterns remains a focal question in evolutionary biology since they reveal how diversity is generated and how it may respond to future environmental change. Here we compare the population genomics and demographic histories of a commercially and ecologically important coral reef fish, the common coral grouper (<em>Plectropomus</em> <em>leopardus</em> [Lacépède 1802]), across two adjoining regions (the Great Barrier Reef; GBR, and the Coral Sea, Australia) spanning approximately 14 degrees of latitude and 9 degrees of longitude. We analysed 4,548 single nucleotide polymorphism (SNP) markers across 11 sites and show that genetic connectivity between regions is low, despite their relative proximity (~ 100 km) and an absence of any obvious geographic barrier. Inferred demographic histories using 10,479 markers suggest that the Coral Sea population was founded by a small number of GBR individuals and that divergence occurred ~ 190 kya under a model of isolation with asymmetric migration. We detected population expansions in both regions, but estimates of contemporary effective population sizes were approximately 50 % smaller in Coral Sea sites, which also had lower genetic diversity. Our results suggest that <em>P. leopardus</em> in the Coral Sea have experienced a long period of isolation that precedes the recent glacial period (~ 10–120 kya) and may be vulnerable to localised disturbances due to their relative reliance on local larval replenishment. While it is difficult to determine the underlying events that led to the divergence of Coral Sea and GBR lineages, we show that even geographically proximate populations of a widely dispersed coral reef fish can have vastly different evolutionary histories.</p>
Data from: Demographic histories shape population genomics of the common coral grouper (Plectropomus leopardus)
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Data from: Latitudinal and seasonal variation in space use by a large, predatory reef fish, Plectropomus leopardus
1. Temperature directly affects the metabolic rate and resource requirements of ectothermic animals, which is likely to influence their movement and habitat use. Space use is a fundamental component of an animal's ecology and the extent of an animal's home range has consequences for individual distributions, community structure and ecosystem function. As ocean temperatures continue to rise as a result of global warming, determining the effects of temperature on space use and movement patterns of important fisheries species is vital. 2. Our aim was to investigate the spatial and temporal variation in space use by a tropical fisheries species, the leopard coralgrouper (Plectropomus leopardus) from two latitudinally distinct locations on Australia's Great Barrier Reef (GBR) to determine the potential response of large-bodied tropical fishes to ocean warming through behavioural modification. 3. Using passive acoustic telemetry of 36 tagged individuals, we found that both core use areas (50%KUD) and home range extent (95%KUD) varied with respect to location, season, body size, and temperature. Average home range extent (95%KUD) for tagged P. leopardus was 0.32km2 at the high-latitude location (Heron Island) compared to 0.23km2 at the low-latitude location (Opal Reef). However, core use areas (50%KUD) did not differ significantly between the two locations. 4. Seasonal differences were also apparent at both locations with P. leopardus showing contraction in home range extent during the summertime. This effect was most pronounced at the low-latitude location where home range was significantly reduced during summer when temperatures exceeded 27°C. 5. Taken together our findings indicate that higher ambient temperature may elicit a sustained and significant decline in space use by a commercially important reef fish. Given projected increases in ocean temperature due to global climate change, large-bodied reef fishes may be increasingly constrained in their movement and space use, which will have ramifications for individual fitness, population viability, fisheries productivity and ecological function.
Data from: Latitudinal and seasonal variation in space use by a large, predatory reef fish, Plectropomus leopardus
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