Ignoring discards biases the assessment of fisheries' ecological fingerprint.
Item Type:Journal Article
Citation:Viana M, McNally L, Graham N, Reid DG, Jackson AL, Ignoring discards biases the assessment of fisheries' ecological fingerprint., Biology letters, 9, 6, 2013, 20130812
20130812.full.pdf (PDF) 330.5Kb
Understanding the pressures of fisheries on the ecosystem is crucial for effective management. Fishery removals, or catch, are composed of both landings and discards. However, the use of discards data in studies investigating the effect of the fishing pressures is sparse. Here, we explore the individual contribution of both these catch components to the overall pressure of fisheries on the ecosystem metrics. Using Irish observer data, we compare the linear relationship between several ecological metrics calculated for landings and discards with those of catch. Our results show that in fisheries with high discarding rates, discards can drive the fisheries’ ecological fingerprint and highlight the need to rectify landings-based estimates to make them representative of those of catch in order to gain a robust picture of the impact of fisheries.
Author: JACKSON, ANDREW
Type of material:Journal Article
Series/Report no:Biology letters
Availability:Full text available