Fishing and the impact of marine reserves in a variable environment

@article{citeulike:96286, abstract = {Abstract: We use discrete-time models to investigate the impact of marine reserve establishment on fishery catch and biomass levels in open-access and quota-regulated fisheries under conditions of recruitment variability and natural mortality events. We find that under the conditions of variability tested, reserves can increase the probability of achieving target levels of biomass (60\%, 35\%, and 5\% of carrying capacity) and can reduce catch variability in neighbouring fisheries, making future planning in the fishery more efficient. The size of the reserve required to meet each objective will depend on the initial condition of the stock and the exploitation rate in the fishery. Reserve coverage of between 20\% and 40\% prevent stock collapse in most cases. In heavily exploited fisheries, reserves are also likely to enhance mean catches, particularly in highly variable systems. If the stock has previously been heavily exploited, large reserves (≥60\%) may be required to significantly increase the probability of achieving target biomass levels. However, once stocks have recovered, reserve coverage may be reduced without a reduction in this probability of success.}, author = {Rodwell, Lynda D. and Roberts, Callum M. }, citeulike-article-id = {96286}, issn = {0706-652X}, journal = {Canadian Journal of Fisheries and Aquatic Sciences}, keywords = {fletcher, nardi, newman, tregonning}, month = {November}, number = {11}, organization = {http://pubs.nrc-cnrc.gc.ca/cgi-bin/rp/rp2\_abst\_e?cjfas\_f04-142\_61\_ns\_nf\_cjfas11-04}, pages = {2053--2068}, posted-at = {2005-07-05 15:37:21}, priority = {2}, publisher = {NRC Research Press}, title = {Fishing and the impact of marine reserves in a variable environment}, url = {http://www.ingentaconnect.com/content/nrc/cjfas/2004/00000061/00000011/art00003}, volume = {61}, year = {2004} }

TY - JOUR ID - citeulike:96286 L3 - citeulike-article-id:96286 N2 - Abstract: We use discrete-time models to investigate the impact of marine reserve establishment on fishery catch and biomass levels in open-access and quota-regulated fisheries under conditions of recruitment variability and natural mortality events. We find that under the conditions of variability tested, reserves can increase the probability of achieving target levels of biomass (60%, 35%, and 5% of carrying capacity) and can reduce catch variability in neighbouring fisheries, making future planning in the fishery more efficient. The size of the reserve required to meet each objective will depend on the initial condition of the stock and the exploitation rate in the fishery. Reserve coverage of between 20% and 40% prevent stock collapse in most cases. In heavily exploited fisheries, reserves are also likely to enhance mean catches, particularly in highly variable systems. If the stock has previously been heavily exploited, large reserves (≥60%) may be required to significantly increase the probability of achieving target biomass levels. However, once stocks have recovered, reserve coverage may be reduced without a reduction in this probability of success. IS - 11 JF - Canadian Journal of Fisheries and Aquatic Sciences SN - 0706-652X OR - http://pubs.nrc-cnrc.gc.ca/cgi-bin/rp/rp2_abst_e?cjfas_f04-142_61_ns_nf_cjfas11-04 EP - 2068 TI - Fishing and the impact of marine reserves in a variable environment PB - NRC Research Press VL - 61 SP - 2053 KW - fletcher KW - nardi KW - newman KW - tregonning AU - Rodwell, Lynda AU - Roberts, Callum PY - 2004/11/01/ UR - http://www.ingentaconnect.com/content/nrc/cjfas/2004/00000061/00000011/art00003 ER -