FN Archimer Export Format PT J TI Trophic interactions in the coastal ecosystem of Sri Lanka: An ECOPATH preliminary approach BT AF HAPUTHANTRI, S VILLANUEVA, Ching-Maria MOREAU, J AS 1:1;2:2,3;3:3; FF 1:;2:PDG-DOP-DCMMN-HMMN-RHPEB;3:; C1 Natl Aquat Resources Res & Dev Agcy NARA, Div Marine Biol Res, Crow Island 15, Colombo, Sri Lanka. IFREMER, Lab Ressources Halieut, F-14520 Port En Bessin Huppain, France. INPIENSAT, Lab Agron Environm & Ecotoxicol, F-31326 Castanet Tolosan, France. C2 NARA, SRI LANKA IFREMER, FRANCE ENSAT, FRANCE SI PORT-EN-BESSIN SE PDG-DOP-DCMMN-HMMN-RHPEB IN WOS Ifremer jusqu'en 2018 copubli-france copubli-int-hors-europe copubli-sud IF 2.072 TC 21 UR https://archimer.ifremer.fr/doc/2008/publication-3892.pdf LA English DT Article DE ;Sri Lanka;Indian Ocean;Fisheries management;Feeding relationships;Trophic level;ECOSIM;ECOPATH;Trophic modelling AB This 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 variations 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 simulation 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 sustainable. (C) 2007 Elsevier Ltd. All rights reserved. PY 2008 SO Estuarine, Coastal and Shelf Science SN 0272-7714 PU Elsevier VL 76 IS 2 UT 000253183800011 BP 304 EP 318 DI 10.1016/j.ecss.2007.07.013 ID 3892 ER EF