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

Microsatellite data reveal fine genetic structure in male Guiana dolphins (Sotalia guianesis) in two geographically close embayments at south-eastern coast of Brazil
Hollatz, C.; Flach, L.; Baker, S.C.; Santos, F.R. (2011). Microsatellite data reveal fine genetic structure in male Guiana dolphins (Sotalia guianesis) in two geographically close embayments at south-eastern coast of Brazil. Mar. Biol. (Berl.) 158(4): 927-933. hdl.handle.net/10.1007/s00227-010-1619-x
In: Marine Biology. Springer: Heidelberg; Berlin. ISSN 0025-3162, more
Peer reviewed article  

Available in Authors 

Keyword
    Marine

Authors  Top 
  • Hollatz, C.
  • Flach, L., more
  • Baker, S.C.
  • Santos, F.R.

Abstract
    A large macrogeographic differentiation has been observed among Sotalia guianensis populations along the South American coast. However, no genetic structure has been detected so far in closely distributed populations of this species, even though it has been observed in other cetaceans. Here, we examined the fine scale population structure for the largest populations of S. guianensis inhabiting Sepetiba and Paraty embayments at the south-eastern coast of Rio de Janeiro, Brazil. Analysis of mitochondrial DNA (mtDNA) control region sequences failed to detect variability among sequences. Conversely, evidence of significant male population structure was found on the basis of ten nuclear microsatellite loci. Surprisingly, the microsatellite markers were able to distinguish between individuals from the two embayments located 60 km apart. The results suggest that differences in habitat type and behavioral specializations are likely to explain the patterns of genetic structure. These findings should provide baselines for the management of communities exposed to increasing human-driven habitat loss.

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