Acronym NA
Category
Fisheries
Title Standardisert metode for fangst per enhet innsats (CPUE): Et forbedret verktøy for å følge bestandsutviklingen av lange og brosme - Standardized catch-per-unit (CPUE) method: An improved tool for tracking the development of ling and tusk Programme National Programme
Instrument (FP6)
Contact Type (FP7)
Strand (Interreg)
NA
Theme (FP7)
Activity Area (FP6)
Regional Area (Interreg)
Action (COST)
NA
Specific Programme (FP7)
NA
Funding source National Coordinator Kristin Helle Coordinator email kristin.helle@imr.no
Coordinator institution
IMR - Institute of Marine Research (Norway)
Institutions involved
NA - Runde miljøsenter AS (Norway) ,
Start year 2012 End year 2013 Funding (€) € 297,175 Website https://www.fhf.no/prosjekter/prosjektbasen/900669/ Summary The habitats of ling and tusk are not covered by traditional scientific surveys; therefore commercial fishery data are the only available data on which to observe abundance trends for these species. Landings data are influenced by a number of factors, such as the size of the fleet, quotas for other species, prices, etc., and therefore, the amount landed is of little value as an abundance indicator. To calculate the catch per unit of effort (CPUE) after 2000, a simple method was applied that did not take into account changes in technology or fishing patterns. This methodology was criticized by both fishermen and ICES who requested further study for developing an appropriate CPUE series for these species. In this project we have evaluated the different methods traditionally used for estimating a standardized CPUE. We found that estimating a CPUE series based on a Generalized Linear Model was the most appropriate method. It was also determined that it was important to evaluate the appropriateness of the subset of the commercial data on which the CPUE series were generated. The resulting CPUE series based on our analyses strongly indicate that the abundance of both ling and tusk have increased over the last 12 years. Our results will be presented at the ICES working group WGDEEP meeting in April 2014, and we will propose that our CPUE series will become the “official” CPUE series for ling and tusk.
Keywords
Fishing effort;
Stock assessment;
Fish;
Landing;
Monitoring;
Fisheries management;
Marine Region
14
Skagerrak, Kattegat (27.IIIa)
13
Northern North Sea (27.IVa)
42
Barents Sea (27.I)
41
Norwegian Sea (27.IIa)
4
Marine Region Map
