Rahman, M. A., Rahman, A. A., Asadujjaman, M., Akter, A., Chowdhury, M. M. I., & Sarwer, M. G.
Abstract
Investigation was carried to find out the abundance and present status of local ichthyo-diversity and production status of managed and unmanaged rain-fed waterlogged paddy lands (rain-fed waterlogged paddy lands ie Dogi) in 2012. Total area of the managed and unmanaged Dogis was 30.76 ha and 29.15 ha respectively. Soil and water quality parameters of the managed Dogis were more or less similar to acceptable limits but varied in the unmanaged Dogis. In six managed Dogis, 35 species under 27 genera were found whereas 22 species of SIS and SRS were naturally recruited. In the unmanaged Dogis, only 20 species of SIS under 14 genera were found and all of them are in near extinct condition in the area. A total of 25 SIS and SRS species were recorded in two study areas where 11 species are threatened. Average fish production in the managed Dogis and unmanaged Dogis was 648.8 kg ha and 47.29 kg ha respectively. Fish production in unmanaged Dogis was 1 1 13 times lower than the managed Dogis. The most significant message of this investigation is that due to lack of management vast Dogis can’t contribute in the country’s total fish production and current ichthyo-diversity is decreasing. It is important to take management steps for the unmanaged Dogis through community engagement to convert an unproductive area into a productive one. These will provide the SIS and SRS suitable habitat for their sustainability.
World Journal of Fish and Marine Sciences 6 (4): 371-377, 2014
ISSN 2078-4589
© IDOSI Publications, 2014
DOI: 10.5829/idosi.wjfms.2014.06.04.85106
13._Two_Types_Rain-Fed_Waterlogged_Paddy_Lands_in_Bangladesh-libre.pdf