A workshop on length-based methods in fisheries analysis in the Solomon Islands

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.

Women and gender participation in the fisheries sector in Lake Victoria

The paper starts with an analysis of the gender roles of women in the fisheries sector. These roles are recognized inthree stages of production: fishing, processing and marketing. Further, the paper looks at the impacts of genderroles in promoting or hindering the involvement of women in fisheries research, development, and management. Lastly, the paper develops recommendations that will ensure the effective participation of women in themanagement of Lake Victoria fisheries resources.

When co-management fails: a review of theory and lessons learned from reservoir fisheries in dry-zone of Sri Lanka

Over recent decades co-management has become an increasingly popular form of governance reform in many developing countries. Viewed as a means of promoting sustainable and equitable management of natural resources, it has seen wide application in small-scale inland fisheries. However, perhaps because of its worthy credentials, there has been insufficient critical assessment of the results. This paper commences with a review of underlying theory which is then used to explore the reasons for failure of a co-management initiative in Sri Lankan reservoir fisheries between 2001 and 2002.

Value chain analysis: shrimp, prawn and tilapia from the southern region of Bangladesh & feasibility analysis: brackish water sea-bass in the southern region in Bangladesh

The WorldFish Center is implementing the FtF Aquaculture Project in 20 southern districts in Bangladesh. The project is implemented under USAID’s Feed the Future initiative in collaboration with the Government of Bangladesh.

A trophic ecosystem model of Lake George, Uganda

A trophic model of Lake George, Uganda, Central Africa was constructed using published quantitative and qualitative information on the various biotic components of the lake and the ECOPATH II approach and software. It is shown that the available production and biomass estimates for the various groups in the system are consistent with each other, and that it is possible to make a balanced model of the major trophic interactions in Lake George.

Transformative change in the CGIAR research program on Aquatic Agricultural Systems

The CGIAR Research Program on Aquatic Agricultural Systems (AAS) is increasingly using the language of transformation to describe its aims and approach to achieving lasting impact at scale. Clarity on what AAS means by “transformation” is important to ensure that use of the term is intentional and meaningful. AAS wants to avoid the risk befalling a number of terms used in the development field-i.e., empowerment and participation-which are applied by such a wide range of actors with divergent intent and ideology that the terms lose meaning.

Third world aquaculture and the environment

Aquaculture systems in developing countries are examined considering their environmental impact as well as benefits for producers. Extensive, semi-intensive and intensive systems are examined. Destruction of the naturalenvironment and ecosystem, pollution effects and detrimental effects of introduced species are among some of thenegative aspects of aquaculture development that have to be considered when setting up development projects.

Techniques for handling large pond and farm datasets

Details are given of techniques to be used in the handling of large amounts of data in the field of aquaculture. Two examples are given where different types of multivariate data analyses are performed on the compiled datasets to identify and quantify the effects of key variables governing growth and production of fish in manured pond systems cultivating tilapia and carp.

Sustaining aquaculture by developing human capacity and enhancing opportunities for women

Women are active participants in aquaculture supply chains, but a dearth of gender-disaggregated information hampers accurate understanding of their contribution. Research results and FAO National Aquaculture Sector Overview (NASO) fact sheets show that female participation rates vary by type and scale of enterprise and country. Women are frequently active in hatcheries and dominate fish processing plant labourers. Women’s work in small-scale aquaculture frequently is unrecognized, under or unpaid.

Studies on the population dynamics of Pellonula leonensis (Clupeidae) in the Cross River, Nigeria

Based on length-frequency distributions and mean annual water temperature, growth and mortality parameter estimates, as well as spawning pattern of Pellonula leonensis (Clupeidae) occurring in the Cross River (Nigeria) have been obtained. The estimated von Bertalanffy growth parameters are TL8 = 156 mm, and K = 0.81 - 0.96 year -1. Natural mortality ranges from M = 0.8 to 0.9 year-1. Spawning occurs during the whole year with a dominant peak in the dry season and a smaller peak early in the rainy season.

Pages

Subscribe to WorldFish RSS