Skip to main content

Free Content Pacific rockfish management: are we circling the wagons around the wrong paradigm?

Download Article:
 Download
(PDF 203.1 kb)
 

Abstract:

West Coast rockfishes are managed with traditional fishing-mortality and spawning stock biomass-based control rules, the objectives of which are to maintain a specific biomass of mature females regardless of their size or age. The implicit assumption is that larvae produced by all females are equivalent in their probability of survival, but recent research on black rockfish indicates that larvae of older mothers are far more likely to survive than those of younger females. Using a simple deterministic equilibrium model that incorporates the influence of maternal age on larval survival, I compared population age structure, fishery yield, effective larval output, and recruitment for four different management strategies: status quo, slot limit, marine reserves, and reduced fishing mortality. Results of these simulations indicate that a 35% reduction in fishing mortality would achieve increases in effective larval output and yield comparable to a 20% marine reserve option. If recruitment is proportional to effective larval output, a 20% marine reserve would increase yield at equilibrium by 9% relative to the status quo. These results suggest that managing for age structure can increase both resilience and yield.

Document Type: Research Article

Publication date: May 1, 2006

More about this publication?
  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Terms & Conditions
  • ingentaconnect is not responsible for the content or availability of external websites
umrsmas/bullmar/2006/00000078/00000003/art00015
dcterms_title,dcterms_description,pub_keyword
6
5
20
40
5

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more