DNA-based species identification of shark fins traded in thai markets.

Unlabelled: Shark fins are among the most highly prized seafood products in the world with massive consumption in Asia over the past several decades. The demand for shark fins is a major driver of the enormous population declines of elasmobranchs that are generally vulnerable to overexploitation. This study aims to better understand the species composition of shark fin products in Thailand and their conservation statuses by using DNA-based species identification.

Status of Southeast Asia's marine sharks and rays.

In Southeast Asia, elasmobranchs are particularly threatened. We synthesized knowledge from the peer-reviewed and gray literature on elasmobranchs in the region, including their fisheries, status, trade, biology, and management. We found that 59% of assessed species are threatened with extinction and 72.

Citizen science reveals the population structure and seasonal presence of whale sharks in the Gulf of Thailand.

The whale shark Rhincodon typus is a broadly distributed and highly mobile planktivorous shark species. The sharks form predictable aggregations in many areas, providing the opportunity for cost-effective scientific monitoring through divers and other marine resource users. Sightings of individuals outside of these aggregate zones elsewhere in their range are typically rare.

Integrated Taxonomy Revealed Genetic Differences in Morphologically Similar and Non-Sympatric and .

Previous examination of the mitochondrial gene and morphological characteristics led to the resurrection of as a second valid species in the genus, in addition to . This study applied an integrated taxonomic approach to revisit the classification of the genus based on new materials from the Malaysian Peninsula, Malaysian Borneo and Eastern Bay of Bengal. Mitochondrial DNA data suggested the possibility of three species of in the Indo-West Pacific, while the nuclear DNA data showed partially concordant results with a monophyletic clade of and paraphyletic clades of and cf.

Complete mitochondrial genome of the blacktip reef shark Carcharhinus melanopterus (Carcharhiniformes: Carcharhinidae).

The complete mitochondrial genome of the blacktip reef shark Carcharhinus melanopterus is determined for the first time in this study. The gene composition and order in the mitogenome of C. melanopterus is identical to most vertebrates.

Complete mitochondrial genome of the mangrove whipray Himantura granulata (Myliobatiformes: Dasyatidae).

In this study, the complete mitogenome of mangrove whipray Himantura granulata was first determined. It is 17,657 bp in length and consists 22 tRNA genes, 2 rRNA genes, 13 protein-coding genes and 1 putative control region with the typical gene arrangement and transcriptional orientation in vertebrates. Two start codon patterns and two stop codon patterns were found in the protein-coding genes.