Capacity for developing and managing genetically improved strains of tilapia in Africa including broodstock management and quarantine

Human and institutional capacities for developing and managing genetically improved tilapia in Africa are discussed. Discussions are related particularly to the status of hatcheries, rearing facilities, research and extension services, training in genetic enhancement, and fish transfer in major aquaculture countries in Africa. The leading aquaculture producing countries are Egypt and Nigeria along with nine other countries with some intermediate levels of fi sh production. The availability of quality fry and fingerlings constitutes a major constraint.

Prevalence of White Spot Syndrome Virus in brood stock, Nauplii and Post-larvae of Tiger shrimp (Penaeus monodon Fabricius, 1798) in Bangladesh

Bangladesh enters into international shrimp market in early 1970s but now it takes second places in the source of foreign currency earning. Now this sector facing a serious problem with a disease named White Spot Syndrome Virus which causes 100% mortality in the shrimp farm within two weeks. In Bangladesh, outbreak of White Spot Syndrome Virus has been a serious problem since 1995. In the present study, it was observed the present situation of White Spot Syndrome Virus prevalence in wild tiger shrimp brood, nauplii and post-larvae in Bangladesh.

A biosafety approach to addressing risks posed by aquaculture escapees

Aquaculture operations should include a comprehensive biosafety program because of the risks they may impose on biological resources in the environments into which cultured organisms may escape. Risk assessment incorporates hazard identification and risk analysis. Risk analysis encompasses describing the likelihood that a hazard and its consequences will occur and the severity of realization of a consequence.

Use of genetically improved and alien species for aquaculture and conservation of aquatic biodiversity in Africa

Aquaculture species are being domesticated and improved through genetic enhancement. Despite the benefits of improved fish in terms of increased production, there are risks associated with conservation of biodiversity when the introduced strains/species escape in natural waters. This is especially important in Africa which is one of the world’s repository of diverse freshwater fish fauna and home to native tilapias.

Fishponds in farming systems

This book is a collection of refereed papers on a controversial subject in agricultural development. Arguing that sustainability of fish culture in ponds needs a new paradigm - feed the pond to grow fish - two chapters focus on nutrient cycling in such systems. Another chapter makes the case for breeding Nile tilapia for resource poor farmers and presents practical options to avoid the pitfalls that arise from natural tilapia mating in low-input ponds.

Option for formulating community based fish sanctuary and its management in beel ecosystem in Brahmanbaria.

With the objective of formulating community based fish sanctuaries in beel ecosystem based on the experiences of traditional fish aggregating devices (FAD), like katha and kua, this study was undertaken in three beels viz., Shakla, Hurul and Shapla located in Brahmanbaria. Results show that surface area coverage for katha ranged between 25 and 60 dec. Two harvests were found to be common, may exceed to three harvests depending on the hydrological condition of beel. Fish production was recorded higher to be the first harvest that decreased chronologically in the second and third harvests.

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