Sihle Mthethwa is a member of staff in the Department of Genetics at Stellenbosch University. He recently completed his doctorate in genetics at the university. His research has focused on the genetic analysis of Cape snoek populations in the Southern Hemisphere, including samples from South Africa, New Zealand, Chile and remote islands. The work revealed that Cape snoek populations comprise at least two genetically distinct groups along the South African coastline that do not interbreed freely, with evidence of a possible third stock shared with Namibia and indications of a recent genetic bottleneck leading to reduced diversity.
Mthethwa’s findings challenge assumptions of a single, well-mixed resource and highlight the need for locally tailored fisheries management, genetic monitoring in stock assessments, and caution regarding imports and labelling to support sustainable conservation of the species and the communities that depend on it.