Alessandro Orio

Alessandro Orio


I am working as a researcher in the stock assessment group and my main focus is North Sea and widely distributed stocks. I am also working on management strategy evaluation (MSE) and on development of assessment models in SS3 and other assessments implemented in FLR.

I have finished my PhD in 2019 in the BONUS INSPIRE (Integrating spatial processes into ecosystem models for sustainable utilization of fish resources) project. My main focus has been on the spatio-temporal dynamics of cod and flounder in the Baltic Sea.

I am also involved since 2013 in the work of the Scientific, Technical and Economic Committee for Fisheries (STECF), especially in the working group of stock assessment in the Mediterranean Sea.


Master's Degree in Marine Science with 110 out of 110 cum laude at the University of Rome “La Sapienza” (Rome, Italy ) in 2012. Thesis: “Analysis of the fish assemblages in the MPA of Ventotene and Santo Stefano (Italy) using the methodology of Underwater Visual Census”. 

Bachelor's Degree in Natural Science with 110 out of 110 cum laude at the University of Rome “La Sapienza” (Rome, Italy ) in 2009. Thesis: “Abundance fluctuations of juvenile hake: effect of environmental and biological factors”.

Publikationer i urval

  • Orio, A., Bergström, U., Florin, A.-B., Lehmann, A., Šics, I., Casini, M.  (2019). Spatial contraction of demersal fish populations in a large marine ecosystem. Journal of Biogeography, doi:10.1111/jbi.13510
  • Neuenfeldt, S., Bartolino, V., Orio, A., Andersen, K. H., Andersen, N. G., Niiranen, S., Bergström, U., Ustups, D., Kulatska, N., Casini, M., 2019. Feeding and growth of Atlantic cod (Gadus morhua L.) in the eastern Baltic Sea under environmental change. ICES Journal of Marine Science, doi:10.1093/icesjms/fsz224

  • Mion, M., Hilvarsson, A., Hüssy, K., Krumme, U., Krüger-Johnsen, M., McQueen, K., Mohamed, E., Motyka, R., Orio, A., Plikshs, M., Radtke, K., and Casini, M., 2019. Historical growth of Eastern Baltic cod (Gadus morhua): Setting a baseline with international tagging data. Fisheries Research, doi:10.1016/j.fishres.2019.105442

  • Niiranen, S., Orio, A., Bartolino, V., Bergström, U., Kallasvuo, M., Neuenfeldt, S., Ustups, D. and Casini, M., 2019. Predator-prey body size relationships of cod in a low-diversity marine system. Marine Ecology Progress Series, 627, 201-206.

  • Casini, M., Tian, H., Hansson, M., Grygiel, W., Strods, G., Statkus, R., Sepp, E., Gröhsler, T., Orio, A. & Larson, N. 2019. Spatio-temporal dynamics and behavioural ecology of a “demersal” fish population as detected using research survey pelagic trawl catches: the Eastern Baltic Sea cod (Gadus morhua). ICES Journal of Marine Science, doi:10.1093/icesjms/fsz016.

  • Kraufvelin, P., Pekcan-Hekim, Z., Bergström, U., Florin, A.B., Lehikoinen, A., et al. (2018). Essential coastal habitats for fish in the Baltic Sea. Estuarine, Coastal and Shelf Science, doi:10.1016/j.ecss.2018.02.014
  • Frelat, R., Orio, A., Casini, M., Lehmann, A., Mérigot, B., Otto, S.A., Sguotti, C. and Möllmann, C. (2018). A three-dimensional view on biodiversity changes: spatial, temporal, and functional perspectives on fish communities in the Baltic Sea. ICES Journal of Marine Science, doi:10.1093/icesjms/fsy027
  • Bauer, B., Meier, H.E.M., Casini, M., Hoff, A., Margonski, P., Orio, A., Saraiva, S., Steenbeek, J., Tomczak, M.T. (2018). Reducing eutrophication increases spatial extent of communities supporting commercial fisheries: a model case study. ICES Journal of Marine Science, doi:10.1093/icesjms/fsy003
  • Orio, A., Bergström, U., Casini, M., Erlandsson, M., Eschbaum, R., Hüssy, K., Lehmann, A., Lozys, L., Ustups, D., Florin, A.-B. (2017). Characterizing and predicting the distribution of Baltic Sea flounder (Platichthys flesus) during the spawning season. Journal of Sea Research, doi:10.1016/j.seares.2017.07.002
  • Orio, A., Florin, A.-B., Bergström, U., Šics, I., Baranova, T., Casini, M. (2017). Modelling indices of abundance and size-based indicators of cod and flounder stocks in the Baltic Sea using newly standardized trawl survey data. ICES Journal of Marine Science, doi:10.1093/icesjms/fsx005.
  • Osio, G. C., Orio, A., & Millar, C. P. (2015). Assessing the vulnerability of Mediterranean demersal stocks and predicting exploitation status of un-assessed stocks. Fisheries Research, 171, 110-121.
  • Jardim, E., Millar, C. P., Mosqueira, I., Scott, F., Osio, G. C., Ferretti, M., Alzorriz, N. & Orio, A. (2015). What if stock assessment is as simple as a linear model? The a4a initiative. ICES Journal of Marine Science, 72(1), 232-236.



Forskare vid Institutionen för akvatiska resurser; Havsfiskelaboratoriet, gemensamt
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