A5024834286- Genetic diversity and population structure
- Identification and Quantification in Food
- Genetic and phenotypic traits in livestock
- Marine and fisheries research
- Fish Ecology and Management Studies
- Climate variability and models
- Aquaculture Nutrition and Growth
- Climate Change, Adaptation, Migration
- Climate change impacts on agriculture
- Environmental DNA in Biodiversity Studies
- Fish Biology and Ecology Studies
Secretariat of the Pacific Community
2020-2023
University of the South Pacific
2019-2020
Recent studies argue for the presence of genetic population structure in yellowfin tuna ( Thunnus albacares ) all oceans. However, persistence family groups has never been considered a viable mechanism structure, nor it measured. We analyzed similarity among 280 tunas from seven samples collected Western and Central Pacific Ocean (WCPO) using single nucleotide polymorphisms, found that was significantly explained by 96 individuals involved 332 half or full sib dyads. higher mean median...
Abstract Sample cross-contamination remains a pervasive issue in genetics and genomics. With growing reliance on molecular methods for managing marine resources, the need to ensure integrity of tissue samples that underpin these has never been more pressing. We conducted an experiment wild-caught bigeye tuna (Thunnus obesus) assess risk under seven at-sea laboratory-based sampling treatments. The six treatments (T1–T6) differ equipment, cleaning, storage procedures. Combining observed...
Skipjack tuna ( Katsuwonus pelamis ) has historically been considered panmictic at the ocean basin scale because of species’ life history and substantial absolute population size. However, recent advances in genomics have enabled scientists to demonstrate structure other species that were likewise traditionally assumed be panmictic. Accordingly, we used DArTseq, a proprietary platform reduced-representation genome sequencing developed by Diversity Arrays Technology (DArTech) genotype 222...
Abstract Albacore tuna ( Thunnus alalunga ) has a distinctly complex life history in which juveniles and adults separate geographically but at times inhabit the same spaces sequentially. The species also migrates long distances presumably experiences varied regimes of physical stress over lifetime. There are, therefore, many opportunities for population structure to arise based on stochastic differences or environmental factors that promote local adaptation. However, with extent mobility...
Decades of study have attempted to describe the population genetic structure tuna species, including a significant number studies focused on yellowfin (Thunnus albacares). Very often, analyses do not agree how many stocks exist per and where their boundaries lie. This is possibly because vary so much across numerous variables, such as geographic range covered in study, type markers used, sites sampled. meta-analysis 22 attempts standardize isolate key variables assessing strength correlation...
Droughts, as complex climatic hazards, can threaten livelihoods, economies, and ecosystems in low-lying island states. In extreme cases, drought may cripple national development these countries, produce long-term impacts that hinder efforts to achieve the United Nations’ sustainable goals. This study addresses rainfall trends, frequency of droughts, La Nina influences relationship between Sea Surface Temperature (SST) small Pacific country Tuvalu. The follows this order approach: (1) examine...
Anderson et al.’s 2019 paper ‘Close Kin Proximity in Yellowfin Tuna ( Thunnus albacares ) as a Driver of Population Genetic Structure the Tropical Western and Central Pacific’ provided observations genetically related individuals among sampled yellowfin tuna. Resampling some from original study produced very different sequencing results when compared with dataset, one possible explanation which is cross-contamination samples. Re-analyses no indication strong population structure, including...