000			nam a22 7a 4500
999			_c9672 _d9672
003			OSt
005			20190126085404.0
008			181214b xxu||||| |||| 00| 0 eng d
040			_cNARA
100			_917930 _aHaputhantri, S.S.K.
245			_aTrophic Interactions in the Coastal Ecosystem of Sri Lanka:An ECOPATH Preliminary Approach
260			_c2008, _aElsevier,
300			_a304-318p.
440			_917936 _aEstuarine Coastal and Shelf Science _n; Vol.76
505			_aThis study attempts to assemble and summarize existing information in order to build a general representation of the trophic interactions within the shallow coastal ecosystem of Sri Lanka. A multispecific ecosystem-based approach on trophic relationships and their possible var­ iations was performed using ECOPATH. Thirty-nine functional groups were considered representing all trophic levels in the food web. Time-dynamic simulation was carried out using the ECOSIM routine to evaluate the impact of the 1998 El Nino event on key functional groups. Results show that the time needed for any impacted functional group to recover to its initial abundance increased with the trophic level. Two time-series data sets derived from commercial catch and effort statistics were used for validation of ECOSIM results. The El Nino simu­ lation results validated by the time-series data confirmed the ability of the proposed multispecies model to describe the sudden environmental changes. Possible impacts due to increase of fishing effort were also simulated by separately considering frequently used fishing gears. The analysis revealed that small-mesh gillnet fishery operates independently from the other existing developing fisheries in the same area and can be managed accordingly. Fishing-effort simulations suggest that the increase of fishing intensity by small-mesh gillnets would contribute to the decline of small pelagic catch. This was also found to influence the overall catch. The present level of exploitation of small pelagic fishery resources does not seem jmstainablg.
700			_917934 _aVillanueva, M.C.S.
700			_917935 _aMoreau, J.
942			_cRP _2ddc