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Project
The demography of fishes
Further development of age determination methods for commercial fish species
Age composition data for fish stocks are essential input parameters for stock assessment. It is therefore necessary to permanently develop age determination methodology further.
Background and Objective
Age composition data for fish stocks are essential input parameters for stock assessment. The methodology of age determination is being permanently developed further in order to work efficiently and to reach consistent results. In this respect, state-of-the-art processing methods (e.g. fully automated otolith sectioning machines) and investigation methods (e.g. digital image analysis) are being employed.
In a PhD project, we test artificial intelligence (AI) methods for age determination.
Target Group
Fisheries science
Approach
The age of fish is being determined by counting growth zones in their ear stones (otoliths). Using state-of-the-art processing techniques and image analysis, annual rings (increments) become visible and are used for age determination.
Please see here for details on the utilization of AI methods for age reading.
Preliminary Results
- Various publications, e.g. Stransky, C., Gudmundsdottir, S., Sigurdsson, T., Lemvig, S., Nedreaas, K., Saborido-Rey, F. (2005): Age determination and growth of Atlantic redfish (Sebastes marinus and S. mentella): bias and precision of age readers and otolith preparation methods. ICES J. Mar. Sci. 62: 655-670.
Links and Downloads
Further projects of the Thünen Fisheries Research, which are funded by the European Maritime, Fisheries and Aquaculture Fund (EMFAF) of the European Union, can be found here under ‘EU Fisheries Projects’.
Age composition data for fish stocks are essential input parameters for stock assessment. It is therefore necessary to permanently develop age determination methodology further.
Links and Downloads
Further projects of the Thünen Fisheries Research, which are funded by the European Maritime, Fisheries and Aquaculture Fund (EMFAF) of the European Union, can be found here under ‘EU Fisheries Projects’.
Thünen-Contact
Involved Thünen-Partners
- Adrian-Schütte, ValeriaSF Institute of Sea Fisheries
- Beußel, Friederike SF Institute of Sea Fisheries
- Brückner, HendrikSF Institute of Sea Fisheries
- Cayetano, ArjaySF Institute of Sea Fisheries
- Hefter-Siebold, MartinaSF Institute of Sea Fisheries
- Hemken, Gitta SF Institute of Sea Fisheries
- Wilhelms, InesSF Institute of Sea Fisheries
Duration
1.2008 - 12.2027
More Information
Project status:
ongoing
Publications
- 0
Cayetano A, Stransky C, Birk A, Brey T (2024) An interactive AI-driven platform for fish age reading. PLoS One 19(11):e0313934, DOI:10.1371/journal.pone.0313934
- 1
Cayetano A, Stransky C, Birk A, Brey T (2024) Fish age reading using deep learning methods for object-detection and segmentation. ICES J Mar Sci 81(4):687-700, DOI:10.1093/icesjms/fsae020
- 2
Follesa MC, Hilvarsson A, Songer S, Aanestad Godiksen J, Beier U, Bekaert K, Berg F, Canha A, Carbonara P, Ni Chonchuir G, Coad Davies J, Denechaud C, Dubroca L, Farias I, Finnbogadottir G, Gault M, Gillespie-Mules R, Heimbrand Y, Krumme U, Ulleweit J, et al (2023) Working Group on Biological Parameters (WGBIOP; outputs from 2022 meeting). Copenhagen: ICES, 365 p, ICES Sci Rep 5(76), DOI:10.17895/ices.pub.23617833
- 3
Carbonara P, Coad Davies J, Damme CJG van, Aanestad Godiksen J, Allegaert W, Beier U, Bekaert K, Canha A, Farias I, Follesa MC, Gault M, Gillespie-Mules R, Haase S, Hilvarsson A, Hüssy K, Korta M, Krüger-Johnsen M, Krumme U, Stransky C, Ulleweit J, et al (2020) Working Group on Biological Parameters (WGBIOP). Copenhagen: ICES, 150 p, ICES Sci Rep 2(117), DOI:10.17895/ices.pub.7651
- 4
Van der Sleen P, Stransky C, Morrongiello JR, Haslob H, Perharda M, Black BA (2018) Otolith increments in European plaice (Pleuronectes platessa) reveal temperature and density-dependent effects on growth. ICES J Mar Sci 75(5):1655-1663, DOI:10.1093/icesjms/fsy011
- 5
Stransky C, Gudmundsdóttir S, Sigurdsson T, Lemvig S, Nedreaas K, Saborido-Rey F (2005) Age determination and growth of Atlantic redfish (Sebastes marinus and S. mentella): bias and precision of age readers and otolith preparation methods. ICES J Mar Sci 62(4):655-670, doi:10.1016/j.icesjms.2005.01.018
- 6
Stransky C, Kanisch G, Krüger A, Purkl S (2005) Radiometric age validation of golden redfish (Sebastes marinus) and deep-sea redfish (S. mentella) in the Northeast Atlantic. Fish Res 74(1-3):186-197, DOI:10.1016/j.fishres.2005.03.003
