A further note on chaos

Patricia Clay (pclay@WHSUN1.WH.WHOI.EDU)
Wed, 23 Aug 1995 14:29:36 -0400

A while back, there was a chaos thread here and a paralell one on FISHFOLK.
The latter recently generated the message below, which I thought chaos
researchers here might be interested in.

> Some time ago, several discussions occurred on FISHFOLK concerning
> whether fishery systems are 'chaotic' (in the mathematical sense).
> Much of this was stimulated by the 1994 article published in MARINE POLICY
> by Wilson et al (Chaos, complexity, and community management of
> fisheries; Vol. 18, p. 291-305).
> A formal "Rejoinder" to the Wilson et al article has been published in
> MARINE POLICY (1995, Vol. 19, No. 5: 437-44) by Mike Fogarty
> (mfogarty@whsun1.wh.whoi.edu) entitled, "Rejoinder - Chaos, complexity
> and community management of fisheries: an appraisal". The abstract of
> the "Rejoinder" is provided below:
> 'Wilson et al suggest that fishery systems are complex and may be
> characterized by chaotic nonlinear dynamics. They conclude that
> constraints on how, when, and where fish are caught ('parametric'
> management approaches), effected at the local level, should be
> implemented in favor of direct controls. Here, I evaluate these
> arguments and conclude that (a) there is currently little evidence
> to support the conclusion that fish populations are chaotic; (b) any
> focus on policy tools is not meaningful in the absence of clearly
> stated and resonable policy objectives; (c) monitoring and control
> of removals from exploited systems must be an integral part of any
> management program; and (d) any evaluation of data requirements
> under parametric management must consider validation of its
> performance and the possibility of changes in the parameters of
> the system over time.'
> Reprints of the "Rejoinder" can be obtained by contacting Mike directly
> (NMFS, NEFSC, Woord Hole Laboratory, Woods Hole, Massachusetts 02543).
> Fred Serchuk
> Woods Hole Laboratory
> Woods Hole, MA 02543
> fserchuk@whsun1.wh.whoi.edu

Dr. Patricia M. Clay, Anthropologist
National Marine Fisheries Service
166 Water St.
Woods Hole, MA 02543 USA
email: pclay@whsun1.wh.whoi.edu