© 2005 International Council for the Exploration of the Sea
Effort distribution and catch patterns adjacent to temperate MPAs
National Marine Fisheries Service Woods Hole, MA 02543, USA
*Correspondence to S. Murawski: tel: +1 301 713 2239; fax: +1 301 713 1940. e-mail: steve.murawski{at}noaa.gov.
We evaluated the spatial distribution of otter trawl fishing effort and catches resulting from the imposition in 1994 of year-round and seasonal groundfish closed areas off the NE USA. Vessel locations were available from logbooks, vessel monitoring system (VMS) data from many of the largest vessels, and from observer records. There was high spatial coherence between VMS- and observer-derived trawling locations. Prior to establishment, 31% of trawl effort (19911993) occurred within the 22 000 km2 of area that would eventually be closed year-round. In 20012003 about 10% of effort targeting groundfish was deployed within 1 km of the marine protected area (MPA) boundaries, and about 25% within 5 km. Density gradients, consistent with spill-over from MPAs, were apparent for some species. Average revenue per hour trawled was about twice as high within 4 km of the boundary, than for more distant catches, but the catch variability was greater nearer closed area boundaries. Seasonal closed areas attracted more fishing effort after opening than prior to closure even while average cpue was the same or lower. Spatial resolution of traditional data sources (e.g., logbooks) was too crude to discern detailed MPA-related effects, as revealed by high-resolution vessel positions from VMS and catch data obtained by observers.
Keywords: marine protected areas, MPA, observer data, spill-over, vessel monitoring system, VMS
Received 11 November 2004; accepted 19 April 2005.
1 Current address for S. Murawski: National Marine Fisheries Service, 1315 EastWest Highway, Silver Spring, MD 20910-3282, USA.
![]()
CiteULike
Connotea
Del.icio.us What's this?
This article has been cited by other articles:
![]() |
S. Jennings The role of marine protected areas in environmental management ICES J. Mar. Sci., October 10, 2008; (2008) fsn163v1. [Abstract] [Full Text] [PDF] |
||||
![]() |
V. Stelzenmuller, S. I. Rogers, and C. M. Mills Spatio-temporal patterns of fishing pressure on UK marine landscapes, and their implications for spatial planning and management ICES J. Mar. Sci., September 1, 2008; 65(6): 1081 - 1091. [Abstract] [Full Text] [PDF] |
||||
![]() |
C. J. Smith, A. C. Banks, and K-N. Papadopoulou Improving the quantitative estimation of trawling impacts from sidescan-sonar and underwater-video imagery ICES J. Mar. Sci., December 1, 2007; 64(9): 1692 - 1701. [Abstract] [Full Text] [PDF] |
||||
![]() |
J.G. Hiddink, T. Hutton, S. Jennings, and M.J. Kaiser Predicting the effects of area closures and fishing effort restrictions on the production, biomass, and species richness of benthic invertebrate communities ICES J. Mar. Sci., January 1, 2006; 63(5): 822 - 830. [Abstract] [Full Text] [PDF] |
||||
