Investing in carp seed quality improvements in homestead aquaculture: lessons from Bangladesh

Lack of quality seed and technical knowhow are considered major constraints to improving aquaculture productivity and profitability in Bangladesh. This paper assesses the outcomes of investments in improving carp seed quality and farmer training, targeting poor and women fish farmers, on the productivity and profitability of homestead aquaculture systems in Southwest Bangladesh.

Growth and survival of olive barb, Puntius sarana (Hamilton 1822) larvae produced with cryopreserved versus fresh sperm

Despite the success in fertilization and hatching of fish eggs with cryopreserved sperm, report on growth and survival of larvae produced from frozen-thawed sperm is inadequate. This study evaluates the applicability of cryopreserved sperm for mass seed production by comparing the growth and survival of a popular food-fish olive barb, Puntius sarana (Hamilton 1822) larvae produced from cryopreserved and fresh sperm.

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.

Culture, social relations and private sector development in the Thai and Vietnamese fish hatchery sectors

This paper provides a comparative analysis of the social and cultural dimensions of fish hatchery development in Vietnam and Thailand. Two detailed case studies highlight the importance of a variety of culturally mediated, informal interpersonal relationships in facilitating the establishment of new hatchery enterprises. The analysis reveals that in both Vietnam and Thailand, informal relationships are extremely effective conduits for the transfer of productive technologies from public institutions to private entrepreneurs and for the subsequent development of private enterprises.

River-based artificial propagation of the African catfish Clarias gariepinus: an option for the small fish farmer

A cheap method of propagating the African catfish, Clarias gariepinus, by incubating the fertilized eggs in a cage placed directly in a flowing river is described. Hatching ranged between 39 and 70%. This is not significantly different from the commonly used water recirculating flow through system. The economic advantages of the river hatching method are discussed with special emphasis on the rural fish farmers.

Pen-culture-based reservoir fisheries management: reservoir production improvement by released of pen-nursed fingerlings of selected species in Thailand

Northeastern Thailand (Isan) is one of the least developed areas in this economically fast growing country. Traditionally, rice farming is the most important source of income and rice is the staple food. Animal protein consumption in the remote areas still largely depends on hunting and collection of products like fish, snails and insects. Besides fisheries activities on the Mekong River and its tributaries, and fish harvests from ricefields and village fishponds, further potential for fish production has been created with the construction of small and medium sized reservoirs.

Low cost breeding and hatching techniques for the catfish (Heteropneustes fossilis) for small-scale farmers.

The high demand for the stinging catfish (Heteropneustes fossilis) and declining wild stocks led the Centre for Aquaculture Research and Extension of India to look for methods for the culture of the species. This paper presents a low-cost, simple breeding technique developed and tested by the Centre that can be easily adopted by rural farmers.

Genetic improvement of freshwater prawn, Macrobrachium rosenbergii (de Man) in India 2007-2010: final report

Macrobrachiurn rosenbergii is one of the widely cultured freshwater prawn species globally. India was the third largest producer of this species in 2007 and its aquaculture production rose to 43,000 metric tons (t) in 2005 froin less than 500 t in 1995. However, since then production has been declining and in 2008-09 it was 12,856 t, a reduction of more than 70% compared to 2005. There are several contributing factors to this decline, such as slow growth rate, poor survival, disease outbreaks, increase in cost of production, and availability of low risk alternative fish species.

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