Age and longevity in fish, with consideration of the ferox trout

Authored by M Mangel, MV Abrahams

Date Published: 2001

DOI: 10.1016/s0531-5565(00)00240-0

Sponsors: United States National Oceanic and Atmospheric Administration (NOAA) National Science and Engineering Research Council of Canada (NSERC) National Sea Grant College Program

Platforms: No platforms listed

Model Documentation: Other Narrative Mathematical description

Model Code URLs: Model code not found

Abstract

In the first part of this paper, we review the evolutionary aspects of age and longevity in fish and then summarize the theory of maturity due to Ray Beverton. This theory allows one to predict age at maturity (and thus a putative point for the onset of senescence) from information on growth rate and mortality rate. We illustrate the application of this theory with data on tilapia species and then discuss the limitations of the theory. In the second part of the paper, we develop an individual based model for the ferox trout. This is a morph of brown trout Salmo salar that is an exception to the common notion that caloric restriction extends lifespan, in the sense that ferox trout achieve long life by eating more, not less. The model allows one to identify the role that ecological and biochemical adaptations play in the longevity of the ferox trout. (C) 2001 Elsevier Science Ltd All rights reserved.

Tags

Brown trout Yellow perch Life-history variation Perch perca-flavescens Lake district stream Size-structured populations Arctic charr Charr salvelinus-alpinus Salmo-trutta-l Lough-melvin