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A Comparative Study of Two Seasonal Floodplain Aquaculture Systems in Bangladesh

M. G. Mustafa
The WorldFish Center, Bangladesh and South Asia Office, House 22B, Road 7, Block F, Banani, Dhaka, 1213, Bangladesh

Alan C. Brooks
The WorldFish Center, Bangladesh and South Asia Office, House 22B, Road 7, Block F, Banani, Dhaka, 1213, Bangladesh

Abstract/ Executive Summary:

This paper presents a comparative analysis of the technical and economic parameters of two community led approaches: the semi-closed water bodies and the floodplain water bodies based systems in Bangladesh. The two approaches differ in management, fish production, impact on biodiversity, capital investment and annual variable costs, share of profits and proportional benefits for the poor, and impact on allied businesses—the so-called backward and forward linkages. For the semi-closed water bodies (beels) the fish harvest increased from an annual average of 380 kg ha ^-1 in 2002 to 921 kg ha^-1 by 2005. During the same period, the biodiversity measured for self-recruiting indigenous species, using the Shannon-Weiner Index (H₀), increased significantly (P , 0.05) from 2.24 in 2002 to 2.56 in 2005. For the floodplain aquaculture system (Pankowri or Daudkandi model) annual fish production ranged from 1.5 to 1.8 t ha^-1. Annual net economic benefit per hectare was found to be Taka 37,710±24,600 and 26,819±10,780 for semi-closed and floodplain systems respectively. The net income per kg of product was found to be Taka 44.0±9.0 and 13.0±3.0 for semi-closed and floodplain systems, respectively. The floodplain system tends to use comparatively more feed and fertilizers per unit area that pond-based aquaculture.

Keywords: Aquaculture, Bangladesh, CBFM, Floodplains, Stocking

Location: Comilla District

Start Date: 00-00-2002

End Date: 00-00-2005

Program Area: Animal Health and Management

Commodity: Aquatic animal

Objectives:

To compare the technical and economic parameters of the two community-led approaches: the semi-closed water bodies and the floodplain water bodies based systems.
To study the management, yield, environmental impact, financial input and equitability, and effect on the market chain vary in the two approaches studied.

Methodology:

Catch monitoring and gear survey: Catch monitoring was an observational process of the fishing effort. The gear survey involved a regular spot survey to obtain a representative of the gear in operation and the total catch from that gear. In addition, with organized fishing, the observations of fishing activity were done for four to eight days per month per site. Survey sampling covered gear census and catch monitoring (subsistence fishing) from 8 of the 12 semi-closed/floodplain water bodies. The stocking and harvest data were also collected from four floodplain water bodies. Gear census covered the number and type of gear operating in the study sites. Catch monitoring recorded species-wise catch statistics of each gear type. An average number of gear units per day was used to estimate a total gear-wise fishing effort for that month as well as for the whole year. A mean gear-wise catch rate was used to estimate total catch for that month, as well as for the whole year. Yearly and overall species distributions were calculated from annual catch statistics data. Overall production was estimated by summing estimated total production for all gear types in each year (subsistence catch and organized production taken from BMC records). However, total production for floodplain water bodies was collected from records maintained by the organization. Shannon-Wiener diversity index: The Shannon-Wiener Index (H0) is one of several indices used to measure biodiversity.

Source of Information: Water Policy 11 Supplement 1 (2009) 69–79

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The present study illustrates the long-term gain that can be secured through the adoption of community-based management approaches at semi-closed and floodplain aquaculture systems. Given the cost-effectiveness of stocking as a means of increasing production and incomes, it is recommended that the CBFM approach be extended to other semi-closed and floodplain aquaculture systems and that it be adopted as a key policy for development of fisheries resources in Bangladesh.

Knowledge Management: Report/Proceedings