Journal ArticleDOI
Implications of life history for genetic structure and migration rates of southern African coastal invertebrates: planktonic, abbreviated and direct development
Peter R. Teske,Isabelle Papadopoulos,Isabelle Papadopoulos,Gerardo I. Zardi,Christopher D. McQuaid,Max Edkins,Charles L. Griffiths,Nigel P. Barker +7 more
TLDR
The amount of genetic structure within marine biogeographic regions strongly depends on the presence or absence of free-swimming larvae, and whether or not they are capable of active dispersal seems to have little effect on connectivity among populations.Abstract:
The amount of genetic structure in marine invertebrates is often thought to be negatively correlated with larval duration. However, larval retention may increase genetic structure in species with long-lived planktonic larvae, and rafting provides a means of dispersal for species that lack a larval dispersal phase. We compared genetic structure, demographic histories and levels of gene flow of regional lineages (in most cases defined by biogeographic region) of five southern African coastal invertebrates with three main types of larval development: (1) dispersal by long-lived planktonic larvae (mudprawn Upogebia africana and brown mussel Perna perna), (2) abbreviated larval development (crown crab Hymenosoma orbiculare) and (3) direct development (estuarine isopod Exosphaeroma hylecoetes and estuarine cumacean Iphinoe truncata). We hypothesized that H. orbiculare, having abbreviated larval development, would employ a strategy of larval retention, resulting in genetic structure comparable to that of the direct developers rather than the planktonic dispersers. However, regional population structure was significantly lower in all species with planktonic larvae, including H. orbiculare, than in the direct developers. Moreover, nested clade analysis identified demographic histories resulting from low levels of gene flow (isolation by distance and allopatric fragmentation) in the direct developers only, and migration rates were significantly higher in all three species having planktonic larvae than in the direct developers. We conclude that the amount of genetic structure within marine biogeographic regions strongly depends on the presence or absence of free-swimming larvae. Whether such larvae are primarily exported or retained, whether they have long or short larval duration, and whether or not they are capable of active dispersal seems to have little effect on connectivity among populations.read more
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The estuaries of South Africa
Brian Allanson,Dan Baird +1 more
TL;DR: Allanson et al. as mentioned in this paper presented a survey of the state of the art in the field of ecology and geomorphology of estuarine zooplankton and macro invertebrates.
Journal ArticleDOI
A review of marine phylogeography in southern Africa
TL;DR: This review describes the state of marine phylogeography in southern Africa, that is, the study of evolutionary relationships at the species level, or amongst closely related species, in relation to the region’s marine environment, and focuses particularly on coastal phylegeography.
Journal ArticleDOI
Ocean barriers and glaciation: evidence for explosive radiation of mitochondrial lineages in the Antarctic sea slug Doris kerguelenensis (Mollusca, Nudibranchia)
TL;DR: The diverse lineages found in D. kerguelenensis point towards a recent, explosive radiation, likely reflecting multiple refuges during glaciation events, combined with limited subsequent dispersal, and supports the Antarctic biodiversity pump phenomenon.
Journal ArticleDOI
Evolutionary dynamics at high latitudes: speciation and extinction in polar marine faunas.
Andrew Clarke,J. Alistair Crame +1 more
TL;DR: A full understanding of evolutionary dynamics at high latitude requires better knowledge of the links between the faunas of the shelf, slope and deep-sea, and molecular techniques to produce phylogenies, coupled with further palaeontological work to root these phylogenies in time are essential to further progress.
Journal ArticleDOI
The distribution of fiddler crabs (Uca) along the coast of Brazil: implications for biogeography of the western Atlantic Ocean
TL;DR: The biogeographical patterns of the extant species can be used to reconstruct an evolutionary scenario for Uca in the tropical and temperate zones of the western Atlantic Ocean.
References
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Molecular Cloning: A Laboratory Manual
TL;DR: Molecular Cloning has served as the foundation of technical expertise in labs worldwide for 30 years as mentioned in this paper and has been so popular, or so influential, that no other manual has been more widely used and influential.
Journal ArticleDOI
Arlequin (version 3.0): An integrated software package for population genetics data analysis
TL;DR: Arlequin ver 3.0 as discussed by the authors is a software package integrating several basic and advanced methods for population genetics data analysis, like the computation of standard genetic diversity indices, the estimation of allele and haplotype frequencies, tests of departure from linkage equilibrium, departure from selective neutrality and demographic equilibrium, estimation or parameters from past population expansions, and thorough analyses of population subdivision under the AMOVA framework.
Journal Article
DNA primers for amplification of mitochondrial cytochrome c oxidase subunit I from diverse metazoan invertebrates.
TL;DR: "universal"