Stochastic simulation of size variation in turbot: possible causes analysed with an individual-based model

Authored by A Folkvord, AK Imsland, T Nilsen

Date Published: 1998

DOI: 10.1006/jfbi.1998.0698

Sponsors: Nordic Academy for Advanced Study (NorFA)

Platforms: No platforms listed

Model Documentation: Other Narrative Flow charts Mathematical description

Model Code URLs: Model code not found

Abstract

Causes of size variation in a population of juvenile turbot were studied using an individual-based model (IBM). Each simulation started with 800 (divided into eight groups of 100 each) 120-day-old (posthatch) juveniles and was run for 140 days, and the data gained from model simulations compared directly with the result of a laboratory study with size-graded turbot. Stochastic growth with memory, which was included in the models as an individual genetical growth rate variation, is important in explaining size variation, and the combination between individual genetic growth rate and social interactions related to size-dependent hierarchies also contributes to size variation. The use of size-dependent growth rate alone fails to explain size variation, and is of little value in predicting size variation in turbot culture. Further, the results indicate formation of different types of size hierarchies for different sizes of juvenile turbot. (C) 1998 The Fisheries Society of the British Isles.

Tags

Atlantic salmon Rainbow-trout Salmo-salar l Juvenile turbot Arctic charr Pleuronectes-platessa Salvelinus-alpinus l Scophthalmus-maximus rafinesque Fish size Food acquisition