Management and conservation implications of cryptic population substructure for two commercially exploited fishes (Merluccius spp.) in southern Africa.

Genomic information can aid in the establishment of sustainable management plans for commercially exploited marine fishes, aiding in the long-term conservation of these resources. The southern African hakes (Merluccius capensis and M. paradoxus) are commercially valuable demersal fishes with similar distribution ranges but exhibiting contrasting life histories.

Litter on the seafloor along the African coast and in the Bay of Bengal based on trawl bycatches from 2011 to 2020.

We present the occurrence of seafloor litter on the coast of Africa and in the Bay of Bengal based on records from the EAF-NANSEN Programme in 2011 to 2020. Litter bycatch records from 534 bottom trawls were standardized to km before analysis. Three percent of the records indicated areas of high littering and the highest densities occurred from 100 to 300 m in depth and 50 to 100 km from the coast.

Bottom trawl fishing footprints on the world's continental shelves.

Bottom trawlers land around 19 million tons of fish and invertebrates annually, almost one-quarter of wild marine landings. The extent of bottom trawling footprint (seabed area trawled at least once in a specified region and time period) is often contested but poorly described. We quantify footprints using high-resolution satellite vessel monitoring system (VMS) and logbook data on 24 continental shelves and slopes to 1,000-m depth over at least 2 years.

Spatial dynamics of the bearded goby and its key fish predators off Namibia vary with climate and oxygen availability.

Hypoxia [O < 2.0 mL L (87 mol kg)] and severely hypoxic water masses [O < 0.5 mL L (21.