DNA Barcoding of Shark and Ray Species from Bawean and Masalembu Waters East Java.
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| Název: | DNA Barcoding of Shark and Ray Species from Bawean and Masalembu Waters East Java. |
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| Autoři: | Joesidawati, Marita Ika, Nursalim, Nining, Kholilah, Nenik, Wibowo, Marandi Eko, Cahyani, Ni Kadek Dita |
| Zdroj: | Scientific Journal of Fisheries & Marine / Jurnal Ilmiah Perikanan dan Kelautan; Jun2025, Vol. 17 Issue 2, p498-511, 14p |
| Témata: | CHONDRICHTHYES, GENETIC variation, TOP predators, FISH conservation, GENETIC barcoding, MARINE biodiversity |
| Abstrakt: | Sharks and rays, as apex predators or mesopredators, help maintain marine biodiversity and ecosystem balance. Their ecological and economic value underscores the need for conservation, as they face threats from overfishing, habitat loss, and climate change, with many classified as vulnerable or endangered by the IUCN. This study investigates the genetic diversity and phylogenetic relationships of sharks and rays in Bawean and Masalembu Waters, East Java, using morphological identification and DNA barcoding. The specimens were obtained from fishermen operating in Bawean and Masalembu Waters. A total of 11 samples were analyzed from five shark species: Sphyrna lewini, Carcharhinus sealei, Stegostoma fasciatum, Galeocerdo cuvier, and Carcharhinus falciformis, and two ray species: Rhynchobatus australiae and Rhina ancylostoma. Results showed high genetic similarity within species, with some divergence observed between samples from the Bawean and Masalembu regions. For instance, populations of Sphyrna lewini from the two regions exhibited slight mitochondrial DNA sequence variations, indicating possible adaptations to local environmental conditions. Similarly, genetic differences in Rhynchobatus australiae suggest limited gene flow between populations, likely influenced by geographical barriers or habitat preferences. Phylogenetic analysis revealed seven distinct clades, highlighting evolutionary relationships such as the close grouping of S. lewini and G. cuvier, which suggests recent divergence. Several species identified, including S. lewini, G. cuvier, and C. falciformis, are protected, underscoring the need for stricter conservation and monitoring efforts to safeguard shark and ray populations. This study highlights the urgency of integrating genetic diversity into conservation strategies to ensure the long-term survival of these vital species. [ABSTRACT FROM AUTHOR] |
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| Databáze: | Complementary Index |
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