Journal
BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
Volume 102, Issue 2, Pages 391-403Publisher
OXFORD UNIV PRESS
DOI: 10.1111/j.1095-8312.2010.01571.x
Keywords
Amazon; biodiversity; conservation genetics; microsatellites; phylogeography; Rio Negro; tropical rainforest
Categories
Funding
- Australian Research Council (ARC) [DP0556496]
- Yale Institute of Biospheric Studies (YIBS), Yale University
- Universidade Federal do Amazonas
- Brazilian National Council of Research and Technology (CNPq) [46.6098/2001-4]
- Bio-Amazonia Conservation International
- Australian Research Council [DP0556496] Funding Source: Australian Research Council
Ask authors/readers for more resources
Accurately describing biodiversity in tropical regions such as Amazonia is difficult because of insufficient morphological inventories and the lack of studies on the distribution of genetic diversity. Aquatic organisms from Amazonian flooded forests are generally expected to move laterally along the forests during the annual inundation cycle, a behaviour that should promote admixture of populations and reduce within-drainage speciation. We used an unprecedented fine-scale sampling effort and multiple DNA markers to quantify region-wide population differentiation in an Amazonian floodplain forest specialist, the black-wing hatchet fish Carnegiella marthae (Myers, 1927). Our study revealed three previously unsuspected and ancient cryptic species of black-wing hatchet fish in the Rio Negro floodplain (RNF), in central Amazonia. Two species produce occasional first-generation hybrids. The third and rarer species, although found in extreme sympatry with another species, appears to be reproductively isolated, and also differs in external morphology and dentition. Our findings have important implications for guiding conservation management because C. marthae is harvested commercially in the RNF ornamental fishery. They also suggest that the diversity of Amazonian ichthyofauna is vastly underestimated, including that found in landscapes lacking contemporary barriers to account for population divergence and speciation. (C) 2011 The Linnean Society of London, Biological Journal of the Linnean Society, 2011, 102, 391-403.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available