Genetic population structure of mangrove jack, Lutjanus argentimaculatus (Forsskål)

Abstract

Abstract. Translocations of mangrove jack, Lutjanus argentimaculatus (Forsskål 1775), to increase angling opportunities in artificial impoundments are foreshadowed in Queensland. To evaluate genetic population structure before translocations occur, mangrove jack were collected from three sites on the Queensland coast and from one site on the north-western coast of Western Australia. Allelic variation at four dinucleotide microsatellite loci was high: gene diversity (heterozygosity) ranged from 0.602 to 0.930 and allelic counts from 10 to 24. Genetic differentiation among collection sites was weak: estimates of F ST were 0.002 for all four sites, and less (F ST = 0.001) across a major biogeographical boundary (the Torres Strait region). Nucleotide sequence from two mitochondrial regions (control, 375 base pairs, and ATPase, 415 base pairs) was obtained from a subset of the Australian and additional Indo-Pacific (Indonesian and Samoan) mangrove jack. Haplotype diversity was high (control region, 33 haplotypes for 34 fish; ATPase region, 13 haplotypes for 56 fish). Phylogenetic analysis of mitochondrial DNA sequence data could not discern a relationship between tree topology and geography. These results suggest that mangrove jack in Queensland, and possibly throughout Australia, experience high levels of gene flow. The artificial gene flow caused by permitted translocations is unlikely to exceed natural levels. Fine-scale ecological matching between donor and recipient populations may increase stocking success, and is important if translocation is needed as a species recovery tool in the future.

Strong genetic but not spatial subdivision of two reef fish species targeted by fishers on the Great Barrier Reef

“…For L. carponotatus, there were 43 haplotypes with only 48 variable sites, 20 of which were parsimony informative and 17 of which were independent indels. Haplotype and nucleotide diversities for the individual locations and the whole population for P. maculatus were high (Table 1) and are comparable to other GBR fish species (Dudgeon et al, 2000;Ovenden and Street, 2003;Messmer et al, 2005;Bay et al, 2006). L. carponotatus haplotype and nucleotide diversities (Table 1) were relatively low for the GBR, but still high for marine fish species (Grant and Bowen, 1998).…”

Looking through glassfish: marine genetic structure in an estuarine species

“…High genetic diversity -no structure Both A. marianus and A. jacksoniensis were found to have high levels of haplotype diversity (Tables 3 and 4), which is typical of marine fish, for example mangrove jack (Ovenden and Street 2003), mackerel, chub mackerel (Zardoya et al 2004) and damselfish (Domingues et al 2005). However, this diversity was not partitioned according to the geographic scale of the study, indicating panmixia (that is, the genetic diversity contained within the population is homogeneous on the geographic scale) (Figs 2 and 3).…”

“…Many studies have investigated phylogeographic structuring of mitochondrial DNA (mtDNA) in freshwater and marine systems to describe the relationships between geographic and genetic distances and their concordances and discordances (Waters et al 2000;Ovenden and Street 2003;Baker et al 2004;Page et al 2004;Huey et al 2006). In general, marine populations tend to be shallowly structured and freshwater systems strongly structured (Bilton et al 2002;Wong et al 2004).…”

Weak genetic differentiation in cobia, Rachycentron canadum from Indian waters as inferred from mitochondrial DNA ATPase 6 and 8 genes

“…The fast rate of mitochondrial DNA evolution, coupled with maternal inheritance, has made mtDNA an extremely useful marker for elucidating the genetic structure of populations and resolving ambiguous phylogenetic relationships among marine species (Rokas et al, 2003). ATPase 6/8 genes of mtDNA is comparatively fast evolving (1.3% per million years) and is extremely useful in assessing population structure, levels of connectivity, and influence of historical processes in fish species (McGlashan & Hughes, 2001;Ovenden & Street, 2003). However, recent studies on the genetic structure of cobia using both mitochondrial (mtDNA) and nuclear DNA (nDNA) have shown significant inter-oceanic differentiation between US Atlantic, Gulf of Mexico, and Southeast Asian populations (Gold et al, 2013).…”