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No Thumbnail AvailableProjectManual on seed production of African catfish (Clarias gariepinus)
Institutional Strengthening in the Fisheries Sector, Bangladesh
1992Also available in:
No results found.Due to the difficulties of Tilapia culture in Africa, particularly, those resulting from overproduction and consequent stunting in growth, attention was focused on another African fish group, which included the large size African catfish, Clarias gariepinus (Burchell, 1882). For pond culture of this species initial attempts were made at the end of sixties and beginning of seventies. The main delimitation of pond culture of it was the inadequate supply of seed at that time (Hogendoorn, 1979). I n the past two decades, methods of fish seed production, intensive and pond rearing of Clarias gariepinus were developed. These studies were made mainly in Central African Republic, the Netherlands and Israel (Viveen et al., 1986). Moreover, necessary taxonomical and biological examination of the African catfish group were carried out in the same period, which revealed that Clarias lazera and Clarias gariepinus so long considered as two separate species, were same and hence they came under the s ame scientific name Clarias gariepinus (Burchell, 1822) (Janssen, 1987). Outside its natural habitat the species is cultured in cooling water of power stations in the Netherlands and also in hot springs in Hungary. The species was also introduced in Thailand, and China. At the end of 1989 the African catfish was introduced in Bangladesh from Thailand by the Ministry of Fisheries and Livestock, Government of Bangladesh. The African catfish (it is known as African magur in Bangladesh) is simil ar to a few Asian catfish species as Clarias batrachus and Clarias macrocephalus. The main distinguishing feature of the species is the shape of occipital process of skull (Figure 1). -
No Thumbnail AvailableProjectManual on seed production of carps
Institutional Strengthening in the Fisheries Sector, Bangladesh
1992Also available in:
No results found.Massive stocking of the open waters with nursery raised fingerlings and large-scale expansion of fish culture are two important strategies currently adopted in Bangladesh for increasing fish production. As a matter of policy, large size fingerling is being used for both open water stocking as well as pond aquaculture. Implementation of Asian Development Bank and World Bank sponsored Second and Third Fisheries Projects which has started stocking of fingerling in flood plains for rearing of mark et size fish has created a new demand for carp seed. These new projects stipulate that the number of 1012 cm size fingerling to be released in open waters every year about 400500 million. To achieve this target, private sector should significantly increase its fingerling production for supply to these projects. Moreover, technology of fingerling rearing as used now, in private sector, should be changed because for stocking in the natural waters, the fingerling should be reared at least up to 101 2 cm size. In some areas of the country (particularly in Jessore) private farmers are using effective methods and getting excellent results in producing of small size fingerling in multicrop system, but multicycle production of large size fingerling is not carried out at any part of the country. Moreover, in general, the present fry/fingerling production technology is characterized by inadequate pond preparation, improper manuring and supply of poor quality feed. (Production data of fish seed producers of the country are given in Table 1.) Further, the presently used management methods are not suitable for full utilization of production capacity of broodfish. With the improvement of broodfish preparation methodology the breeding season may be prolonged, facilitating multicycle production of fish seed. -
No Thumbnail AvailableProjectDevelopment of Fish Seed Production Centre, Gaylegphug
Establishment of Fish Seed Production Centre, Bhutan
1987Also available in:
No results found.This report was prepared during the course of the project identified on the title page. The conclusions and recommendations given in the report are those considered appropriate at the time of its preparation. They may be modified in the light of further knowledge gained at subsequent stages of the project. The designations employed and the presentation of the material in this document do not imply the expression of any opinion whatsoever on the part of the United Nations of the Food and Agricu lture Organization of the United Nations concerning the legal or constitutional status of any country, territory or sea area, or concerning the delimitation of frontiers.
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