A very simple approach is used to estimate the extent to which the amount of anchovy recruits of the year available to penguin colonies off the west coast has been reduced by historic levels of fishing. This suggests that over the past decade the extent of this reduction has at most been some 10%.
Reference:
Butterworth, D. S., & de Moor, C. L. (2010). A very simple implementation of the “River Model” to estimate the impact of fishing on the amount of anchovy Aaailable to West Coast Penguin Colonies. MCM Document MCM. Document MCM/2010/SWG_PEL/Island Closure Task Team/10. MARAM: University of Cape Town.
Butterworth, D. S., & De Moor, C. L. (2010). A very simple implementation of the "River Model" to estimate the impact of fishing on the amount of anchovy available to West Coast penguin colonies University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group. Retrieved from http://hdl.handle.net/11427/18993
Butterworth, Doug S, and Carryn L De Moor A very simple implementation of the "River Model" to estimate the impact of fishing on the amount of anchovy available to West Coast penguin colonies. University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group, 2010. http://hdl.handle.net/11427/18993
Butterworth DS, De Moor CL. A very simple implementation of the "River Model" to estimate the impact of fishing on the amount of anchovy available to West Coast penguin colonies. 2010 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18993
