Skip to main content

Free Content Combining Proximate and Ultimate Approaches to Understand Life History Variation in Salmonids with Application to Fisheries, Conservation, and Aquaculture

Download Article:
(PDF 466.4697265625 kb)


One of the great challenges of biology is to understand pattern and variation simultaneously. In the salmonids, this challenge arises in the context of the major life-history events of migration from fresh water to the sea and returning from sea-water to fresh water. We have developed life-history models that combine proximate (physiological mechanism) and ultimate (natural selection) considerations and that allow us to understand both the pattern and the variation in Atlantic and coho salmon and steelhead trout. The conceptual framework can be implemented by stochastic dynamic programming and leads to generalizations about top-down and bottom-up control of life histories, the evolution of diadromy, implications for the management of fisheries, the recovery of salmonid populations, and effective aquaculture. The salmonids are one of the best examples of the principle that nature is indeed complicated and variable but much of that variability can be understood.

Document Type: Research Article

Publication date: 2008-07-01

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
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect 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