Publication Abstract

A methodology to map the extent of the seabed significantly affected by bottom trawling

M. Diesing*,  J. Aldridge* and D. Stephens*

The negative impacts bottom towed fishing gear might have on benthic species and communities have long been recognised. With the advent of vessel monitoring system data it has become feasible to map the intensity of fishing for different sea areas and gear types. Whether or not the intensity of fishing has detrimental consequences for sea-floor integrity is however as well dependant on the level to which benthic fauna is preconditioned to disturbance by natural processes, in particular waves and currents. Here we report on a methodology that compares fishing pressure by bottom towed gear against natural disturbance levels. We exemplify how the extent of seabed significantly affected by demersal fishing for different substrate types could be estimated using substrate and habitat models of the British part of the English Channel. Potential shortcomings of the method are discussed and areas where further research is required are identified.

Reference:

M. Diesing*,  J. Aldridge* and D. Stephens* (2011) A methodology to map the extent of the seabed significantly affected by bottom trawling. ICES CM 2011/G:10