<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Watson, R.</style></author><author><style face="normal" font="default" size="100%">Alder, J.</style></author><author><style face="normal" font="default" size="100%">Walters, C.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">A dynamic mass-balance model for marine protected areas</style></title><secondary-title><style face="normal" font="default" size="100%">Fish and Fisheries</style></secondary-title><alt-title><style face="normal" font="default" size="100%">Fish Fish.</style></alt-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">04003 Modeling, mathematics, computer applications</style></keyword><keyword><style  face="normal" font="default" size="100%">D</style></keyword><keyword><style  face="normal" font="default" size="100%">ECOSYSTEM</style></keyword><keyword><style  face="normal" font="default" size="100%">energy flow</style></keyword><keyword><style  face="normal" font="default" size="100%">fish catch statistics</style></keyword><keyword><style  face="normal" font="default" size="100%">fishery management</style></keyword><keyword><style  face="normal" font="default" size="100%">management</style></keyword><keyword><style  face="normal" font="default" size="100%">marine</style></keyword><keyword><style  face="normal" font="default" size="100%">MARINE ECOSYSTEMS</style></keyword><keyword><style  face="normal" font="default" size="100%">modelling</style></keyword><keyword><style  face="normal" font="default" size="100%">MODELS</style></keyword><keyword><style  face="normal" font="default" size="100%">O 5080 Legal/Governmental</style></keyword><keyword><style  face="normal" font="default" size="100%">Protected resources</style></keyword><keyword><style  face="normal" font="default" size="100%">Q1 01604 Stock assessment and management</style></keyword><keyword><style  face="normal" font="default" size="100%">Q5 01523 Conservation,</style></keyword><keyword><style  face="normal" font="default" size="100%">Refugia</style></keyword><keyword><style  face="normal" font="default" size="100%">wildlife management and recreation</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2000</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Mar</style></date></pub-dates></dates><number><style face="normal" font="default" size="100%">1</style></number><volume><style face="normal" font="default" size="100%">1</style></volume><pages><style face="normal" font="default" size="100%">94-98</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">A modified ECOSIM model was used to investigate the impact of establishing marine protected areas (MPAs) in ecosystems defined by existing ECOPATH models. The impact of MPAs of various sizes was simulated, and changes in biomass and catch over a range of years observed. The response of biomass and catch to MPA size depended on the time period examined. For some ecosystem groups, the initial response was negative, but for all groups there were increases after 10 years. The greater the biomass exchange rate across the MPA boundary, the larger the MPA required to increase biomass levels. Within the range of exchange rates simulated, the maximum increases in catch and overall biomass levels were reached when 20% of the system was protected.</style></abstract><accession-num><style face="normal" font="default" size="100%">4757021</style></accession-num><notes><style face="normal" font="default" size="100%">English</style></notes><auth-address><style face="normal" font="default" size="100%">Fisheries Centre, University of British Columbia, 2204 Main Mall, Vancouver, B.C. V6T 1Z4, Canada; E-mail: regwatson@fisheries.com</style></auth-address></record></records></xml>