- Split View
-
Views
-
Cite
Cite
A. L. Jensen, Linearization with ordinary least-squares estimation, and nonlinear estimation of mortality using the catch equation, ICES Journal of Marine Science, Volume 46, Issue 2, 1990, Pages 175–177, https://doi.org/10.1093/icesjms/46.2.175
- Share Icon Share
Abstract
The catch equation and mortality equation together give accumulated catch during a period of time in terms of recruitment R, the instantaneous fishing mortality coefficient F, and the instantaneous total mortality coefficient Z. The solution of the coupled equations can be linearized for estimation of Z by least squares, or it can be applied directly for nonlinear least-squares estimation of Z. Both approaches are applied to several populations. The two types of estimates can differ considerably. In general, linearization gives estimates of Z that best predict the logarithm of abundances, and nonlinear least squares gives estimates of Z that best predict abundances. Nonlinear estimates are best for calculation of yields.