Details

Autor(en) / Beteiligte

• Madduppa, Hawis
• Bahri, Samsul
• Ghozali, Ahmad Taufik
• Atmadipoera, Agus Soleh
• Subhan, Beginer
• Santoso, Prakas
• Natih, I. Nyoman Metta
• Arafat, Dondy

Titel

Population genetic structure of Olive ridley (Lepidochelys olivacea) across Indonesian archipelago revealed by mitochondrial DNA: Implication for management

Ist Teil von

• Regional studies in marine science, 2021-01, Vol.41, p.101600, Article 101600

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The Olive Ridley (Lepidochelys olivacea) is one of the smallest species of sea turtles well known for its migration across the Indian and Pacific Oceans, as well as Southeast Asia waters. However, there is currently no available information on their population structure across Indonesia, which will be beneficial to their management. Therefore this study was conducted to determine the genetic structure and population connectivity of L. olivacea across the Indonesian archipelago. The samples were obtained from the waters of the archipelago, and divided into four groups depending on: (i) sampling sites, (ii) Indonesian marine ecoregion, (iii) regional territory, and (iv) pooled population of both Indonesian and Indo-Pacific sites. Furthermore, the analysis was based on 791-bp fragment of the DNA control region from 132 individuals, and additional 84 sequences (India, Australia, and Mexico) from Genbank. A significant genetic differentiation was observed among Indonesian sampling sites (FST=0.44, p<0.001), between marine ecoregions (0.40, p<0.001), Indonesian territories (0.35, p<0.001), and the global population (0.60, p<0.001). The haplotype connectivity in the eight sampling sites constructed a five-clade network of L. olivacea. In addition, two out of five clades exhibited unique haplotypes, where one clade was the biggest, consisting of five Mid-West Indonesian sampling sites (Aceh, Pariaman, Panggul, Serangan and Tuafanu) and connected to the Indian population, while another was formed in Mid-East Indonesia (Kapoposang, Pulau Yapen and Teluk Cendrawasih). The Australian population shared most haplotypes with the Indonesian population. This study showed a distinct need for a management effort between sites and regions of L. olivacea due to limited gene flow between various populations. A strong population structure and limited genetic connectivity between its populations across the Indonesian archipelago is a very important factor for enhancing the conservation and management efforts of this species.