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DNA barcoding of fish larvae reveals uncharacterised biodiversity in tropical peat swamps of New Guinea, Indonesia

Author:
  • Arif Wibowo
  • Niklas Wahlberg
  • Anti Vasemägi
Publishing year: 2017
Language: English
Pages: 1079-1087
Publication/Series: Marine and Freshwater Research
Volume: 68
Issue: 6
Document type: Journal article
Publisher: CSIRO Publishing

Abstract english

The Indonesian archipelago, Borneo, Sumatra and West New Guinea (Papua), hosts half of the world's known tropical peat swamps, which support a significant proportion of the estimated biodiversity on Earth. However, several species groups that inhabit peat swamp environments remain poorly characterised and their biology, particularly during early life stages, is not well understood. In the present study we characterised larval and juvenile fish biodiversity, as well as spatial and temporal variability, in a pristine peat swamp environment of the River Kumbe in West New Guinea, Indonesia, based on analysis of the mitochondrial cytochrome-c oxidase subunit 1 (COI) sequence (501bp). Altogether, 10 fish species were detected in the peat swamp habitat during the larval and juvenile stages, whereas 13 additional species were caught at older stages. Twelve species were detected only in a single site, whereas some species, such as the Western archerfish (Toxotes oligolepis) and Lorentz's grunter (Pingalla lorentzi), were observed in all sampling sites. The occurrence of fish larvae also varied temporally for several species. In contrast with many earlier DNA barcoding studies in fish, we were not able to determine the species identity for a large proportion of sequenced larvae (68%) because of the lack of corresponding COI sequences in the reference dataset. Unidentified sequences clustered into five separate monophyletic clades. Based on genetic divergences, the putative taxonomic origin for the five morphotypes are Atherinidae, Osteoglossidae, Terapontidae and Gobiidae.

Keywords

  • Zoology
  • Ecology

Other

Published
  • ISSN: 1323-1650
Professor Niklas Wahlberg at the unit of Biodiversity, Lund University.
E-mail: niklas [dot] wahlberg [at] biol [dot] lu [dot] se

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