Reviews in Fish Biology and Fisheries

, Volume 22, Issue 3, pp 635-640

First online:

A technical note on seasonal growth models

  • Emili García-BerthouAffiliated withInstitute of Aquatic Ecology, University of Girona Email author 
  • , Gerard Carmona-CatotAffiliated withInstitute of Aquatic Ecology, University of Girona
  • , Roberto MerciaiAffiliated withInstitute of Aquatic Ecology, University of Girona
  • , Derek H. OgleAffiliated withNorthland College

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access


The growth of many organisms is seasonal, with a dependence on variation in temperature, light, and food availability. A growth model proposed by Somers (Fishbyte 6:8–11, 1988) is one of the most widely used models to describe seasonal growth. We point out that three different formulae (beyond numerous typographical errors) have been used in the literature referring to Somers (Fishbyte 6:8–11, 1988). These formulae correspond to different curves and yield different parameter estimates with different biological interpretations. These inconsistencies have led to the wrong identification of the period of lowest growth rate (winter point) in some papers of the literature. We urge authors to carefully edit their formulae to assure use of the original definition in Somers (Fishbyte 6:8–11, 1988).


von Bertalanffy growth function Seasonality Temperature Fishery models Somers’ (1988) growth model