|Productivity, exploitation and fishing technology of inland open-water fisheries, Bangladesh. Consultancy report. (1995)|
|2. PRODUCTIVITY AND EXPLOITATION OF INLAND OPEN WATER FISHERIES|
Several researches have been done on the culture fisheries in the country, specially on pond fish culture by different workers. But very few researches have been carried out on the inland open-water fisheries by the scientists of different institutes. Most of these works were on the biology and taxonomy of fishes. There is hardly any research work on the fish population dynamics, stock assessment, fish migration, bio-diversity, species diversity, fishing technology and limnology of waterbodies. Most of these researches were carried out by the scientists of different institutes sporadically. The Fisheries Research Institute (FRI) was established to carry out researches more systematically and precisely. The Riverine
Station of the FRI has been conducting researches on open-water fisheries since its inception. By this time, this research station has completed seven research projects and made significant achievements. At present, it has seven on-going projects and has proposed eight new projects for the next five year plan. However, the following recommendations are made for obtaining sustainable yield from open-water fisheries.
i) Research should be carried out on the stock assessment, population dynamics and exploitation rate of commercially important fishes specially hilsa, major carps, catfishes and shrimps for their effective management.
ii) Studies should be carried out on the limnology of different types of inland open waterbodies such as rivers, khals, canals, beels and floodplains.
iii) Studies should be carried out on the toxic effect of different industrial effluents and pesticides to fish and other aquatic organisms.
iv) A research programme should be undertaken to assess the impact of FCD project on fish, other aquatic organisms and ecology of fish habitats by comparing all these parameters just before and immediately after the completion of the projects.
v) Studies should be carried out on the species composition of different types of open-water habitats to identify the species which are at the verge of extinction and to suggest measures for their propagation through artificial means.
vi) Studies should be carried out on the biodiversity of different types of open-water habitats.
vii) Researches should be conducted on the migration and stocks of Hilsa ilisha to determine its route of migration, types of migration, seasons of migration and migratory circuit of its different stocks.