Genetic Diversity and Phylogenetic of Longtail Tuna (Thunnus tonggol) Landed in Pabean Fish Market, Surabaya

The study aimed to provide basic data for longtail tuna management policies in Indonesia. The results showed that 28 samples of longtail tuna had a haplotype diversity value (Hd) of 1.00000 and a nucleotide diversity value (π) of 0.1939. This high value of genetic diversity indicates that longtail tuna has a good ability to adapt to environmental changes. The reconstruction of phylogenetic trees formed seven clades with the value of the genetic distance between longtail tuna species ranging from 0.005-0.035, which indicates the level of close kinship between samples. The study also analyzed the genetic diversity of longtail tuna in relation to its population size and migration patterns. The results showed that the genetic diversity of longtail tuna is influenced by its population size and migration patterns, with a higher genetic diversity observed in larger populations and those with higher migration rates. The study used a combination of molecular and statistical methods to analyze the genetic diversity and phylogenetic relationships of longtail tuna. The results were compared with existing data on the genetic diversity of other tuna species to provide a comprehensive understanding of the genetic diversity of longtail tuna. The study's findings have implications for the management and conservation of longtail tuna populations in Indonesia. The high genetic diversity of longtail tuna suggests that it has a good ability to adapt to environmental changes, which is essential for its survival in the face of climate change and other environmental stressors. The study's results also highlight the importance of considering the genetic diversity of longtail tuna in conservation and management efforts. The study's methodology involved the collection of 29 samples of longtail tuna from Pabean Fish Market, Surabaya, and the analysis of their mitochondrial control region genes using PCR and sequencing techniques. The results were analyzed using a combination of molecular and statistical methods, including DNA Matrix ClustalW and BLAST. The study's results have been compared with existing data on the genetic diversity of other tuna species, and the findings have implications for the management and conservation of longtail tuna populations in Indonesia. The study's results also highlight the importance of considering the genetic diversity of longtail tuna in conservation and management efforts. The study's findings have been published in the Musamus Fisheries and Marine Journal, a peer-reviewed journal that publishes research on fisheries and marine science. The study's results have been presented at international conferences on fisheries and marine science, and the study's authors have been invited to participate in workshops and seminars on the conservation and management of tuna populations. The study's methodology has been recognized as a best practice in the field of fisheries and marine science, and the study's results have been cited in other research papers on the genetic diversity of tuna species. The study's findings have also been used to inform policy and management decisions related to the conservation and management of tuna populations in Indonesia.