Integrative taxonomy detects cryptic and overlooked fish species in a neotropical river basin

Gomes, LC, Pessali, TC, Sales, NAIARA GUIMARAES, Pompeu, PS and Carvalho, DC 2015, 'Integrative taxonomy detects cryptic and overlooked fish species in a neotropical river basin' , Genetica, 143 (5) , pp. 581-588.

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The great freshwater fish diversity found in the neotropical region makes management and conservation actions challenging. Due to shortage of taxonomists and insufficient infrastructure to deal with such great biodiversity (i.e. taxonomic impediment), proposed remedies to accelerate species identification and descriptions include techniques that combine DNA-based identification and concise morphological description. The building of a DNA barcode reference database correlating meristic and genetic data was developed for 75 % of the Mucuri River basin’s freshwater fish. We obtained a total of 141 DNA barcode sequences from 37 species belonging to 30 genera, 19 families, and 5 orders. Genetic distances within species, genera, and families were 0.74, 9.5, and 18.86 %, respectively. All species could be clearly identified by the DNA barcodes. Divergences between meristic morphological characteristics and DNA barcodes revealed two cryptic species among the Cyphocharax gilbert and Astyanax gr. bimaculatus specimens, and helped to identify two overlooked species within the Gymnotus and Astyanax taxa. Therefore, using a simplified model of neotropical biodiversity, we tested the efficiency of an integrative taxonomy approach for species discovery, identification of cryptic diversity, and accelerating biodiversity descriptions.

Item Type: Article
Schools: Schools > School of Environment and Life Sciences > Ecosystems and Environment Research Centre
Journal or Publication Title: Genetica
Publisher: Springer
ISSN: 0016-6707
Related URLs:
Funders: CNPq
Depositing User: NAIARA GUIMARAES Sales
Date Deposited: 09 Sep 2016 08:25
Last Modified: 09 Aug 2017 02:47

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