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Revisiting the ichthyodiversity of Java and Bali through DNA barcodes: taxonomic coverage, identification accuracy, cryptic diversity and identification of exotic species.

TitreRevisiting the ichthyodiversity of Java and Bali through DNA barcodes: taxonomic coverage, identification accuracy, cryptic diversity and identification of exotic species.
Type de publicationJournal Article
Year of Publication2016
AuteursDahruddin, H, Hutama, A, Busson, F, Sauri, S, Hanner, R, Keith, P, Hadiaty, R, Hubert, N
JournalMol Ecol Resour
Date Published2016 Mar 22
ISSN1755-0998
Résumé

Among the 899 species of freshwater fishes reported from Sundaland biodiversity hotspot, nearly 50% are endemics. The functional integrity of aquatic ecosystems is currently jeopardized by human activities and landscape conversion led to the decline of fish populations in several part of Sundaland, particularly in Java. The inventory of the Javanese ichthyofauna has been discontinuous and the taxonomic knowledge is scattered in the literature. The present study provides a DNA barcode reference library for the inland fishes of Java and Bali with the aim to streamline the inventory of fishes in this part of Sundaland. Owing to the lack of available checklist for estimating the taxonomic coverage of the present study, a checklist was compiled based on online catalogs. A total of 95 sites were visited and a library including 1,046 DNA barcodes for 159 species was assembled. Nearest neighbor distance was 28-fold higher than maximum intra-specific distance on average and a DNA barcoding gap was observed. The list of species with DNA barcodes displayed large discrepancies with the checklist compiled here as only 36% (i.e. 77 species) and 60% (i.e.24 species) of the known species were sampled in Java and Bali, respectively. This result was contrasted by a high number of new occurrences and the ceiling of the accumulation curves for both species and genera. These results highlight the poor taxonomic knowledge of this ichthyofauna and the apparent discrepancy between present and historical occurrence data is to be attributed to species extirpations, synonymy and misidentifications in previous studies. This article is protected by copyright. All rights reserved.

DOI10.1111/1755-0998.12528
Alternate JournalMol Ecol Resour
Identifiant (ID) PubMed27000429