IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Genetic and morphological variation in two littorinid gastropods: evidence for recent population expansions along the East African coast
Silva, S.E.; Silva, I.C.; Madeira, C.; Sallema, R.; Paulo, O.S.; Paula, J. (2013). Genetic and morphological variation in two littorinid gastropods: evidence for recent population expansions along the East African coast. Biol. J. Linn. Soc. 108(3): 494-508. hdl.handle.net/10.1111/j.1095-8312.2012.02041.x
In: Biological Journal of the Linnean Society. Academic Press: London; New York. ISSN 0024-4066, more
Peer reviewed article  

Available in Authors 

Keywords
    Haplotypes; Littoraria coccinea glabrata (Philippi, 1846) [WoRMS]; Littoraria scabra (Linnaeus, 1758) [WoRMS]; ISW, Indian Ocean [Marine Regions]; Marine
Author keywords
    Local adaptation; mtDNA; Population expansion; Shell morphometrics

Authors  Top 
  • Silva, S.E.
  • Silva, I.C.
  • Madeira, C.
  • Sallema, R.
  • Paulo, O.S.
  • Paula, J.

Abstract
    In marine species, population diversity and differentiation is affected by the population history and by the complex interaction between oceanographic dynamics and ecological traits. In the present study, we examined two species of marine gastropods (the mangrove periwinkle Littoraria scabra and the rocky shore Littoraria glabrata) along the East African coast, using both genetic and geometric morphometric methods. We report a greater variation of shell shape in L. scabra compared to the slightly smaller variation in L. glabrata. This variation was probably associated with variation of environmental factors along the coast, such as temperature and hydrodynamics. Despite morphological variation, we found low mitochondrial genetic differentiation among samples from different localities for both species, which is probably a consequence of the ongoing gene flow during the free-swimming larval stage of these gastropods. Additionally, high levels of haplotype diversity, low nucleotide diversity, and ‘star-like’ genealogies were found in both species. These observations and the results from mismatch distributions, indicate a possible signature of recent population expansions in both species, which probably started during interglacial periods of the Pleistocene and led to the colonization of the Indian Ocean coast.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors