Penaeid prawns in Ungwana Bay, Kenya, are heavily exploited by artisanal fishers and industrial bottom trawlers. Human activities mangrove estuarine areas may affect prawn nursery habitats influence juvenile recruitment to fished areas, therefore it was important investigate patterns the bay. To test hypotheses that single genetic stocks exist, we utilised a combination of mtDNA sequence microsatellite data. Three dominant sympatric species, Penaeus monodon, Fenneropenaeus indicus...

Abstract Historical demographic events shape genetic diversity that remains evident in the genomes of contemporary populations. In case species are conservation concern, this information helps to unravel evolutionary histories can be critical guiding efforts. The Knysna seahorse, Hippocampus capensis , is world’s most endangered seahorse species, and it presently survives only three estuaries on South African south coast. Factors contributed becoming unclear; additionally, lack whether...

Physicochemical characteristics and phytoplankton species composition abundance (chlorophyll-a concentration) were measured in Chepkanga Dam during the months of November December (2007) February (2008); all sampling being within dry season. Three sites (A, B C) selected to correspond different anthropogenic impacts. Triplicate water samples collected twice per month analysed laboratory (chlorophyll-a; dissolved oxygen reactive phosphorus concentrations). In situ measurements temperature pH...

This study reports tolerance levels and lethal concentrations of yolk sac free swimming fry African catfish (Clarias gariepinus) to different therapeutic doses formalin. Comparative treatments were up 2000 ppm for 15, 30 60 min exposure times 150 24 h time the second experiment on concentrations. In both stages, higher survivals recorded at short lower The LC50 value was 130 90 with total mortalities beyond 125 respectively. Although other gave best performance in terms survival, we...

Marine crustaceans support important small-scale fisheries along the Kenyan coast. Annual catches have been declining, with climate change, pollution, overfishing and parasites proposed as causes. It is unknown whether parasite intensity diversity change between locations, sea - sons host species. The current study aimed to address this by analysing gastro-intestinal (GIT) of two prawn species, Penaeus indicus Metapenaeus monoceros, lobster Panulirus ornatus P. homarus. A total 240 prawns...

Abstract The white teatfish, Holothuria fuscogilva , is widely distributed in coastal areas, including waters around coral reefs and seagrasses the Indo-Pacific. In Kenya, species shallow reefs, with higher landings reported from Vanga-Shimoni-Msambweni seascape on Kenyan south coast. present study investigated genetic structure effects of fishing pressure diversity H. populations three fish landing sites south-coast using an analysis mitochondrial cytochrome oxidase sub-unit I (COI) gene....

Small scale fisheries is dominant along the Kenya coast characterised by multispecies, multigear and multi-fleet therefore prone to over-exploitation. The success of sustainable management dependent on life history traits target stock. This study was aimed characterize small lethrinus fishery as well determine its current stock status. Monthly shore-based catch assessments for biological data were collected from October 2020 September 2021 selected fish landing sites coast. A total 22...