A Systematic approach to advance and refine genetic improvement programs in aquatic species

Aquaculture is predicted to continue playing a major and ever increasing role in meeting human's needs for protein. Production systems in developing countries are largely based on the use of unimproved species and strains. As knowledge and experience are accumulated in the management, feeding and animal health issues of such production systems, the availability of genetically more productive stock becomes imperative in order to more effectively use the resources.

The sustainable livelihoods approach to the development of freshwater prawn marketing systems in Southwest Bangladesh

A conceptual framework, drawn from an approach to poverty reduction known as the Sustainable Livelihoods Approach (SLA), is applied to understanding the role of freshwater prawn (Macrobrachium rosenbergii) marketing systems in southwest Bangladesh. Freshwater prawn marketing potentially provides economic returns and social benefits to the rural poor. Although the potential benefits are great, a number of constraints were identified for the longterm sustainability of prawn marketing systems.

Surveying bacterial human pathogens in shrimp culture in Thailand.

Any presence of bacterial human pathogen in shrimp products may be of public health concern. This note concludes that Salmonella do not appear to constitute a part of the microbial flora where shrimp culture is practiced in Thailand. Vibrio cholerae 01, the cause of cholera are rarely recovered from the environment with no isolates containing genes encoding cholera toxin. Further studies are needed to describe the prevalence of bacterial human pathogens in shrimp culture, especially determination of possible postharvest cross-contamnation with these pathogens

Sumilon Island reserve: 20 years of hopes and frustrations.

Over 20 years, successive openings and closures of the Sumilon Island marine reserve to fishers have provided unique opportunities to examine the effects of marine reserves on populations and communities of fishes and upon local fisheries. The history of the reserve also highlights the problems and frustrations of educating and convincing people of the need for rational management of renewable marine resources. Yet, it is a symbol of hope in that it has provided a unique example of the potential benefits of marine reserves in fisheries management, particularly in the developing world.

Study on the species assemblages of tropical continental shelves, based on the trawl data collected by the "R.V. Dr. F. Nansen", 1975-1988

A brief account is given of a study of the species assemblages of the Western Indian Ocean, based on the trawl data collected during surveys conducted on the continental shelves in the region. The major objective is to describe thepatterns of species associations and relate them to environmental conditions. Details are given of the various computer programmes used in the study.

Stock assessment of the anchovy Cetengraulis mysticetus (Pisces: Engraulidae) in the inner part of the Gulf of Nicoya, Puntarenas, Costa Rica.

A study of the population dynamics of the anchovy Cetengraulis mysticetus is presented, based on two sets of length-frequency dates from the artisanal fishery of the Gulf of Nicoya, Costa Rica, between 1989/90 and 1992/93. Covered are growth, length-weight relationships, fishing and natural mortality, gear selection and yield-per-recruit analysis.

The status of routine fishery data collection in Southeast Asia, central America, the South Pacific, and West Africa, with special reference to small-scale fisheries

The Food and Agriculture Organization (FAO) strategy for improving information on the status and trends of capture fisheries (FAO Strategy STF) was endorsed by Member States and the UN General Assembly in 2003. Its overall objective is to provide a framework, strategy, and plan to improve knowledge and understanding of the status and trends of fisheries as a basis for policy-making and management, towards conservation and sustainable use of resources within ecosystems.

A standard format for design and evaluation of pond experiments

Details are given of a standard format used by the Pond Dynamics/Aquaculture Collaborative Research Support Program of the US Agency for International Development for the communication of experimental ideas. An example is given of the "Preliminary Proposal Format," which contains a list of information categories or headings as follows: Title; Objectives: Significance; Experimental design; Pond facilities; Stocking rate; Other inputs; Sampling plan; Hypotheses; Statistical methods; Duration; Water management; and Schedule.

Spawning induction of three tropical sea cucumbers, Holothuria scabra, H. fuscogilva and Actinopyga mauritiana

The current study examines induced spawning in three commercially important tropical sea cucumbers: sandfish (Holothuria scabra), white teatfish (H. fuscogilva) and surf redfish (A. mauritiana). This research forms part of a project to assess the potential for releasing cultured juveniles to restore depleted stocks (Battaglene and Bell, 1999; Battaglene, 1999). The study concentrates on H. scabra because it appears to have the most potential for aquaculture and stock enhancement (James, 1996; Battaglene and Bell, 1999; Battaglene et al., 1999).

Pages

Subscribe to WorldFish RSS