A5063608966- Ichthyology and Marine Biology
- Fish Biology and Ecology Studies
- Identification and Quantification in Food
- Fish Ecology and Management Studies
- Genetic diversity and population structure
- Genetic and phenotypic traits in livestock
- Genomics and Phylogenetic Studies
- Marine Bivalve and Aquaculture Studies
- Plant Pathogens and Fungal Diseases
- Animal and Plant Science Education
- Insect and Arachnid Ecology and Behavior
- Insect Utilization and Effects
- Mycorrhizal Fungi and Plant Interactions
- Paleontology and Evolutionary Biology
- Banana Cultivation and Research
- Genetics, Bioinformatics, and Biomedical Research
- Fish biology, ecology, and behavior
- Fungal Plant Pathogen Control
- Viral Infections and Vectors
- Livestock and Poultry Management
- Marine Ecology and Invasive Species
- Plant Pathogenic Bacteria Studies
- Marine and fisheries research
- Plant pathogens and resistance mechanisms
- Genetics and Plant Breeding
Stellenbosch University
2016-2025
Institute for Deciduous Fruit, Vines and Wine
2016
Mitochondrial genomes (mitogenomes) display relatively rapid mutation rates, low sequence recombination, high copy numbers, and maternal inheritance patterns, rendering them valuable blueprints for mapping lineages, uncovering historical migration understanding intraspecific population dynamics, investigating how environmental pressures shape traits underpinned by genetic variation. Here, we present the bioinformatic pipeline code used to assemble annotate complete mitogenomes of five...
The limited standards for the rigorous and objective use of mitochondrial genomes (mitogenomes) can lead to uncertainties regarding phylogenetic relationships taxa under varying evolutionary constraints. mitogenome exhibits heterogeneity in base composition, rates may vary across different regions, which cause empirical data violate assumptions applied models. Consequently, unique signatures dataset must be carefully evaluated before selecting an appropriate approach phylogenomic inference....
Summary The black soldier fly, Hermetia illucens , is an emerging biotechnological agent with its larvae being effective converters of organic waste into usable bio‐products including protein and lipids. To date, most operations use unimproved commercial populations produced by mass rearing, without cognisance specific breeding strategies. genetic phenotypic consequences these practices remain unknown could have a significant impact on long‐term population viability productivity. aim this...
There are two recognized forms of the disease net blotch barley: form caused by Pyrenophora teres f . (PTT) and spot P. maculata (PTM). In this study, amplified fragment length polymorphism analysis was used to investigate genetic diversity population structure 60 PTT 64 PTM isolates collected across Australia (66 isolates) in south‐western Cape South Africa (58 isolates). For comparison, tritici‐repentis , Exserohilum rostratum Bipolaris sorokiniana samples were also included analyses. Both...
The black soldier fly (BSF), Hermetia illucens, is a promising candidate for the emerging insect farming industry with favourable characteristics both bioremediation and production of animal delivered nutritive industrial compounds. genetic management commercial colonies will become increasingly important sustainability industry. However, r-selected life history traits insects pose challenges to conventional husbandry breeding approaches. In this study, long-term effects mass-rearing were...
Abstract The black soldier fly (BSF), Hermetia illucens , has the ability to efficiently bioremediate organic waste into usable bio‐compounds. Understanding impact of domestication and mass rearing on fitness production traits is therefore important for sustainable production. This study aimed assess patterns genomic diversity its association phenotypic development across early generations under two selection strategies: greater larval (SEL lines) no direct artificial (NS lines). Genome‐wide...
The common smooth-hound (
Overfishing has led to the collapse of many marine fish stocks along South African coast, particularly species characterised by predictable distribution patterns and vulnerable life-history traits. Dusky kob (Argyrosomus japonicus) is an estuarine-dependent sciaenid that been severely depleted overfishing currently managed suboptimal management measures aggravated poor enforcement compliance regulations. The present study utilised microsatellite markers evaluate levels genetic diversity...
Similarly to the rest of world, southern Africa's diverse chondrichthyan fauna is currently experiencing high fishing pressures from direct and non-direct fisheries satisfy market demands for shark products such as fins meat. In this study, development microsatellite markers through cross-species amplification primer sets previously developed closely related species reported an alternative approach de novo marker development. This included design four multiplex assays their utility in...
The tope shark (Galeorhinus galeus Linnaeus, 1758) is a temperate, coastal hound found in the Atlantic and Indo-Pacific oceans. In this study, population structure of Galeorhinus was determined across entire Southern Hemisphere, where species heavily targeted by commercial fisheries, as well locally, along South African coastline. Analysis conducted on total 185 samples using 19 microsatellite markers 671 bp fragment NADH dehydrogenase subunit 2 (ND2) gene. Across three geographically...
Summary H aliotis midae is South Africa's most important aquaculture species. The reproduction cycle currently not closed as many farms rely on wild‐caught broodstock for seed production. However, there an increasing interest in genetic improvement commercial stocks, with a growing number of producers implementing selective breeding strategies. High throughput production and mass spawning make it difficult to maintain records; therefore, mostly selection practised. high fecundity unequal...
In this study, multiple paternity (MP) was investigated in three commercially important shark species, common smoothhound Mustelus mustelus, dusky Carcharhinus obscurus and scalloped hammerhead Sphyrna lewini occurring southern Africa. Reduced marker panels of between five six microsatellite loci were constructed for each species used to genotype assess the presence MP a total 60 M. mustelus individuals from litters, 90 C. 14 litters 54 S. 13 litters. Analysis GERUD COLONY revealed all...
Molecular genetic techniques, such as DNA barcoding and genotyping, are increasingly being used to assist with the conservation management of chondrichthyans worldwide. Southern Africa is a shark biodiversity hotspot, large number endemic species. According IUCN Red List, quarter South Africa's threatened extinction. commercial fisheries have increased over last decade there need ensure sustainable utilisation this resource. Here, we give an overview molecular techniques that in...
The Gempylidae (snake mackerels) family, belonging to the order Perciformes, consists of about 24 species described in 16 genera primarily distributed tropical, subtropical, and temperate seas worldwide. Despite substantial research on this family utilizing morphological molecular approaches, taxonomy categorization group has remained puzzling for decades prompting need further investigation into underlying evolutionary history among gempylids using tools. In study, we assembled eight...
The International Union for Conservation of Nature (IUCN) estimates that over a third all chondrichthyan species (sharks, rays and chimaeras) are threatened with extinction, primarily by overfishing (as target or bycatch species). Owing to the wide-ranging distributions many chondrichthyans, they often overlooked in marine protected area (MPA) design. South Africa is biodiversity hotspot diversity, improve conservation status these country's continental exclusive economic zone (EEZ), we...
Abstract Adaptive divergence in response to environmental clines are expected be common species occupying heterogeneous environments. Despite numerous advances techniques appropriate for non‐model species, gene–environment association studies elasmobranchs still scarce. The bronze whaler or copper shark ( Carcharhinus brachyurus ) is a large coastal with wide distribution and one of the most exploited southern Africa. Here, we assessed neutral adaptive genomic diversity C. across highly...
The complex evolutionary patterns in the mitochondrial genome (mitogenome) of most species-rich shark order, Carcharhiniformes (ground sharks) has led to challenges phylogenomic reconstruction families and genera belonging particularly family Triakidae (houndsharks). current state phylogeny remains controversial, with arguments for both monophyly paraphyly within family. We hypothesize that this variability is triggered by selection different a priori partitioning schemes account site gene...
Haliotis midae is one of the most valuable commercial abalone species in world, but highly vulnerable, due to exploitation, habitat destruction and predation. In order preserve wild cultured stocks, genetic management improvement has become crucial. Fundamental this availability employment molecular markers, such as microsatellites Single Nucleotide Polymorphisms (SNPs) . Transcriptome sequences generated through sequencing-by-synthesis technology were utilized for vitro silico...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 544:183-196 (2016) - DOI: https://doi.org/10.3354/meps11596 When two oceans meet: regional population genetics of an exploited coastal shark, Mustelus mustelus Simo N. Maduna1,*, Charlene da Silva2, Sabine P. Wintner3,4, Rouvay Roodt-Wilding1, Aletta E. Bester-van der Merwe1 1Molecular Breeding and...