Australia's marine fishes DNA barcode reference library for integrated taxonomy, metabarcoding & eDNA research.

Area of Science:

• Marine Biology
• Genomics
• Bioinformatics

Background:

• Global marine fish diversity exceeds 15,000 species, necessitating robust methods for cataloging and management.
• DNA barcoding, particularly using the mitochondrial cytochrome c oxidase subunit 1 (COI) gene, is a key tool for describing and understanding fish diversity.
• A comprehensive reference library is crucial for accurate species identification and ecological studies.

Purpose of the Study:

• To establish a DNA barcode reference library for marine fishes from Australian territorial waters.
• To document the mitochondrial COI gene sequences for a significant number of marine fish species and specimens.
• To provide a publicly accessible dataset for research in taxonomy, biodiversity, and environmental DNA (eDNA) studies.

Main Methods:

• Sequencing of the mitochondrial COI gene from 9,767 voucher specimens of marine fishes.
• Integration of morphological and genetic data for species-level taxonomic assignment.
• Curation and maintenance of physical specimens and extracted DNA at the CSIRO Australian National Fish Collection (ANFC).

Main Results:

• The dataset comprises COI barcodes from 9,767 specimens, representing at least 2,220 species and 288 families.
• Species-level integrated taxonomy was determined for 91% of the dataset.
• The library is the most complete COI barcode reference dataset for marine fishes from Australian waters, covering data from 2005-2022.

Conclusions:

• The developed COI barcode library significantly enhances the capacity for marine fish identification and taxonomic research in Australia.
• This resource supports ongoing integrated taxonomy, metabarcoding, and eDNA studies, contributing to marine biodiversity monitoring and management.
• The public accessibility of this dataset in the Barcode of Life Data System (BOLD) promotes collaborative research and data sharing.