Mitochondrial DNA analyses of the red rock lobster Jasus edwardsii supports an apparent absence of population subdivision throughout Australasia

Testing the consistency of connectivity patterns for a widely dispersing marine species

“…Previous analysis of mitochondrial DNA has shown that J. edwardsii populations are genetically indistinguishable between and within Australia and New Zealand (Ovenden et al, 1992). This suggests that populations were isolated too recently to allow genetic divergence, that there is sustained gene flow between Australia and New Zealand homogenizing populations or that it is the result of the conserved nature of mitochondrial DNA that may have prevented the identification of genetic structure (Selkoe and Toonen, 2006).…”

A new species ofJasus(Crustacea: Decapoda: Palinuridae) from the eastern South Pacific Ocean

“…J. novaehollandiae has recently been synonymised with the New Zealand species J. edwardsii (Booth et al 1990;Ovenden et al 1992). The description of Jasus caveorum in this paper brings the number of species in the genus to seven.…”

Overlap of Home Ranges of Resident and Introduced Southern Rock Lobster after Translocation

“…The southern rock lobster Jasus edwardsii has two apparent phenotypic morphs-a small slow-growing red and white speckled morph ("small pale" [SP] morph) with longer legs, which resides in deep water, and a larger faster-growing, red morph ("large red" [LR] morph) with shorter legs, which resides in shallow water (Chandrapavan et al, 2009a)-but are of one genetic stock (Ovenden et al, 1992). Demographic traits of these morphs differ also; the SP phenotypic morph matures at a smaller size (65-mm carapace length [CL]), is slower growing, and tends to have low exploitation rate and high densities (Punt et al, 1997).…”

“…Successful stock enhancement requires a thorough understanding of the ecological processes influenced by stocking in different ecosystems (Stottrup and Sparrevohn, 2007), including biological interactions between the resident and inhabitant fish that may influence productivity, genetic diversity, or disease transmission (Hilborn, 1998;Araki and Schmid, 2010). Of primary concern in the current translocation in this panmictic stock (Ovenden et al, 1992) was the displacement of resident animals by the introduced stock, which can occur if space is limited and the carrying capacity is reached or if there is territoriality, dominance, or aggression. As red is inherently intimidating in freshwater fishes and terrestrial species (Barlow, 1983;Vercken and Clobert, 2008), and size differences can increase agonistic behavior in captive lobsters and catchability in wild J. edwardsii lobsters (Frusher et al, 2003;Thomas et al, 2003), there was concern that the SP lobsters might be at a disadvantage when introduced into the territory of LR lobsters due to color, size, and prior residence dominance and disorientation upon release.…”