000			nam a22 7a 4500
999			_c9385 _d9385
003			OSt
005			20181226102355.0
008			181214b xxu||||| |||| 00| 0 eng d
040			_cNARA
100			_917476 _aAmarasinghe, U.S.
245			_aInvestigation of the Negombo estuary (Sri Lanka) brush park fishery, with an emphasis on community-based management
260			_c2002, _bBlackwell Science Ltd.
300			_a41-56p.
440			_917499 _aFisheries Management and Ecology _n; Vol.9
520			_aThe Negombo estuary bi'ush park fishery in Sri Lanka was investigated from June 1998 to March 1999. The mean fish yield (all species) in the fishery was 12.46 t ha-1 yr_l. Fin fish species formed about 91% of the yield and the rest was formed by penaeid shrimps and crabs. Fish yield and the twig density in the brush park exhibited a second order polynomial relationship indicating a minimum yield at an intermediate value of twig density in the brush parks. The relationship between fish yield and duration of implantation of brush parks showed an optimal period of 30-40 days for high fish yields. Income levels of fishermen, availability of construction material and suitable sites for implantation of brush parks are some of the factors determining size and number of brush parks per fisherman and duration of installation. Indigenous knowledge within the fishing community about the effect of salinity variations, twig density and mangrove species used on the harvests greatly contribute to effective operation of this fishing practice. Cultivation of mangroves to obtain twigs and branches is a unique feature in this estuary. Indigenous knowledge on mangroves has led to the adoption of sound silvicultural practices. Although cultivating mono-specific mangrove stands may not increase diversity of mangrove forests, it reduces denudation of naturally occurring mangrove forests because of brush park construction, and retains habitats for other organisms. Mangrove management plans in the Negombo estuary should therefore be viewed and treated in an integrated manner that takes into account both resource and social components.
700			_917500 _aAmarasinghe, M.D.
700			_917501 _aNissanka, C.
942			_cRP _2ddc