Acronym DECODE
Category
Fisheries
Title Improved methodology for cod age estimation Programme DG MARE
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 European Coordinator Karin Hüssy Coordinator email kh@aqua.dtu.dk
Coordinator institution
DTU-AQUA - Technical University of Denmark; National Institute of Aquatic Resources (Denmark)
Institutions involved
CEFAS - Centre for Environment, Fisheries & Aquaculture Science (United Kingdom) ,
LATFRA - Latvian Fish Resources Agency (Latvia) ,
MIR/SFI - Sea Fisheries Institute in Gdynia (Poland) ,
SBF - Swedish Board of Fisheries (Sweden) ,
TI-OF - Thünen-Institute of Baltic Sea Fisheries (Germany) ,
Start year 2007 End year 2009 Funding (€) € 200,000 Website https://ec.europa.eu/fisheries/publications/decode-improved-methodology-baltic-cod-age-estimation_sv Summary The objective of this project is to develop and implement an objective method for the age-determination of Eastern Baltic cod. The assessment for Eastern Baltic Cod (Sub-divisions 25-32) has presented a number of problems in recent years. The key problem is the severe inconsistencies in age determination which affect both the catch-at-age and the survey data. The methods to be developed within this project are based on the use of otolith biometrics. This procedure has proven successful in other stocks with age-reading problems. The data series on commercial and survey catch length distributions, otolith biometrics and biological parameters (collected for ICES Study Group on Ageing Issues in Baltic Cod (SGABC)) will be extended back as far as 2000. Mixture and conditional models to estimate age structure for a given component in stock assessment will be developed as statistically robust approaches to age-determination. Based on this new method, the historic catch and survey data will be reconstructed. The primary focus is on data for routine single-species assessments, but data for multi-species assessments will also be updated where possible.
Keywords
Cod;
Fish biology;
Population dynamic;
Stock assessment;
Fish;
Marine Region
21
Southern Central Baltic-East (27.IIId.26)
14
Skagerrak, Kattegat (27.IIIa)
19
Gulf of Finland (27.IIId.32)
20
Archipelago Sea (27.IIId. 29)
24
Sound, Belt Sea or Transition Area (27.IIIb,c)
17
Bothnian Sea (27.IIId.30)
18
West of Gotland (27.IIId.27)
27
Bothnian Bay (27.IIId.31)
23
Baltic West of Bornholm (27.IIId.24)
22
Southern Central Baltic-West (27.IIId.25)
16
East of Gotland or Gulf of Riga (27.IIId.28)
11
Marine Region Map
