The decline in fish landings and the reduction in the marketing value of fish from Lake Nasser can be attributed to improper fishing practices and unsuitable fish handling. Such practices have a negative economic impact on fishstocks, fishers’ income, employment opportunities and the human food supply. With the support of assorted stakeholders, the Youth Employment in Aswan Governorate: Extension of Fisheries and Aquaculture Interventions project conducted a stock assessment study over two years to identify the salient features of the Lake Nasser fishery to better use its resources.
Fish from Lake Nasser are an important source of animal protein in Upper Egypt. However, stocks are overfished and catches are decreasing. In 2017, WorldFish, as part of the Youth Employment in Aswan Governorate: Extension of Fisheries and Aquaculture Interventions project, conducted a stock assessment study to gather information and data to develop a fishery management plan.
Shrimp farming is considered a “risky business” and often compared to gambling for farmers. It is associated with a diverse range of risks and uncertainties, including volatile markets, climate variability, and production risks. In order to mitigate the effects of unpredictability farmers may decide on a particular stocking density and adopt different risk management strategies.
The success of marine stocking programs hinges on releasing hatchery-produced juvenile animals into the optimal marine habitat. This study sought to identify optimal microhabitat features of coastal seagrass meadows for juvenile sea cucumbers Holothuria scabra, a species cultured widely for stock restoration, sea ranching and sea farming.
A brief account is given of a workshop organized by the South Pacific Research Coordination Unit of the ForumFisheries Agency in order to examine the use of length frequency data as a tool in fish population assessment in the South Pacific region. The workshop concentrated on the ELEFAN suite of programmes and length frequency data for species from a variety of taxa and habitats were analyzed.
In scale of operations, variety of species produced, amount of financial backing, and degree of popular and official support, the Japanese fisheries restocking program (saibai gyogyo) is unique. From its birth in 1962 when the government established two hatcheries on the Seto Inland Sea, it has undergone continuous expansion. By 1982, some 37 coastal prefectures are scheduled to have sea farming centers operating. Seven national centers have been opened and five more are under construction. There are also 11 other semi-government or private hatcheries.
Catch assessment estimates for the motorized and non-motorized canoes at Boa-Manga (Cameroon) were found to be 5.13 and 2.70 t/year, respectively, leading to an estimated lower limit for the production of the Ocean division (100 km coastline) of 1190 t/year. The net economic benefit for the motorized canoes is higher than that of non-motorized canoes. It appears better to modernize only the existing non-motorized craft.
The introduction of Tilapia rendalli in Lake Sauce is described,outlining the various biological investigations which were necessaryfor management of the lake and biomass estimation, age determinationand overcrowding.
Relative biomass per recruit of adult (i.e. sexually mature) fin to shellfish is shown to help in identifying levels of fishing mortality likely to lead to recruitment overfishing. This is illustrated with data from a Malaysian penaeid shrimp fishery.
The Tuna and Billfish Assessment Programme is a 3-year programme designed to provide a better understanding of the stocks of tuna and billfish throughout the central and western Pacific and also to determine the status of the stocks of the commercially important species. It will provide data as a basis for the assessment of optimum yields and will provide governments with information upon which sound fisheries development and resource management can be based. The specific topics to be covered by the Programme are listed.