What is the added value of including fleet dynamics processes in fisheries models

摘要: We develop a spatially and seasonally explicit bioeconomic model with three fleet dynamics processes built in endogenously. The has been applied to the large French trawlers harvesting medium-depth demersal stock, North Sea saithe (i.e., pollock, Pollachius virens), mix of deepwater species over 10-year period (1999–2008), predictions have contrasted observations. best overall fit was achieved where effort allocation determined be 80% by traditions 20% economic opportunism harvest efficiency increased 8% year. With this parameterization, annual trends fishing profit were well reproduced whole time period. Time series observed metier generally fitted 1999–2003, but less so 2004–2008. also reasonably catches most series, except for black scabbardfish (Aphanopus carbo).