* ICLARM is now known as WorldFish Center

Naga - The *ICLARM Quarterly
Vol. 22, No. 3 (July - September 1999)

Network of Tropical Aquaculture Fisheries Professionals (NTAFP) Section

Aquabyte (Aquaculture Section of NTAFP)

Scientists are becoming more vocal about the need for conservation of aquatic resources that are increasingly under threat. The potential for aquaculture of a large number of species has yet to be assessed. However, their importance in capture fisheries should not be underestimated. A paper in a previous issue highlighted the importance of small size indigenous finfish as a valuable source of calcium, iron and vitamin A in Bangladesh. This issue has an article that highlights the decline in the availability of indigenous small fish to the rural poor as a result of agricultural intensification and the resultant habitat loss. It indicates a need for developing aquaculture of these species to protect this important source of nutrition for the rural population.

Introduction and reintroduction of exotics to increase production from aquaculture operations is going on in many countries with little or no concern for the impact of these introductions on the environment and biodiversity. The paper from India suggests a strategy for management and reintroduction of exotics based on ecological and genetic data.

Dr. M.V. Gupta

Conservation of the Nilgiri Rainbow Trout
in India

A. Gopalakrishnan, K.K. Lal and A.G. Ponniah

Rainbow trout is one of the important exotic species that is well established in the upland waters of India. This paper presents the historical background of its introduction and the present status of the fish in the streams of the Nilgiri peninsula of India. The rainbow trout inhabits natural reservoirs and streams of the region as a self recruiting population. The growth rate is reported to be relatively low and conflicting views about its taxonomic status have been reported. Successful crossbreeding of the Nilgiri rainbow trout with trout stocks from the Indian state of Himachal Pradesh has indicated the scope for utilizing cryopreserved milt as a mode of introducing new genetic material into the Nilgiri rainbow trout population. This paper outlines the requirement of ecological and genetic data to develop a strategy for management and reintroduction of fresh stocks.

A. Gopalakrishnan, K.K. Lal and A.G. Ponniah are from the National Bureau of Fish Genetic Resources (NBFGR) 351/28, Dariyapur, Talkatora Road, P.O. Box No. – 19 Lucknow 226 004, U.P., India.

Developing Aquaculture of Small Native Species (SNS) in Bangladesh: Village Level Agroecological Change and the Availability of SNS
D. Mazumder and K. Lorenzen

Small native species (SNS) of fish are an important source of protein and income for rural people in Bangladesh. A rapid rural appraisal study was carried out to explore recent changes in the availability of SNS in relation to agroecology and related issues. Village residents noted that the availability of SNS had declined drastically due to habitat loss related to agricultural intensification and due to the restriction of access to the remaining habitats in the course of aquaculture development. Their perception was that poor people had gained from the intensification of agriculture in terms of rice consumption but had lost in terms of reduced access to fish and other animal products.

D. Mazumder is a Research Associate at *ICLARM, Road no. 7, House no. 75, Block-H, Banani, Dhaka-1213, Bangladesh. 
K. Lorenzen is Lecturer in Freshwater Fisheries at the Huxley School of Environment, Earth Sciences and Engineering, Imperial College, 8 Princes Gardens, London SW7 1NA. 

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