Cyril Piou




Job experience and education

Since August 2015 - CIRAD scientist working in cooperation at the National Anti-locust center of Aït Melloul and the Ibn Zohr University of Agadir 

Sept. 2013 - August 2015 - CIRAD scientist working in cooperation at IAV Hassan II, Horticultural complex of Agadir and together with the National Anti-locust center of Aït Melloul

Sept. 2010 - August 2013 - Scientist at CIRAD, Bios, Pests and Diseases unit, Acridology team

July 2008 - August 2010 - Post-Doc with Etienne Prévost at INRA of St Pée sur Nivelle (64). Project: Potential effects of climate change on life history strategies of Atlantic salmon.

April 2007 - June 2008 - Post-Doc with Uta Berger at Dresden University (Germany). Project: Proposing an information criterion for individual-based models.

October 2003 - March 2007 - PhD with Uta Berger and Candy Feller at the Center for Tropical Marine Ecology of Bremen University (Germany). Project: Patterns and individual-based modeling of spatial competition within two main components of Neotropical mangrove ecosystems. PDF

September 2001 - Sept. 2003 - Master of Science ISATEC (International Studies in Aquatic Tropical Ecology). Field work at the Institute of Marine Studies of Belize University. Project: E ffects of hurricane disturbances on mangrove forest structure, studying the case of Belizean offshore islands and KiWi model simulations.


Research projects


My work in the acridology team of CIRAD-CBGP is mainly focusing on desert locust in Western Africa. Since 2010, I'm working on two main axes :

  1. Phenotypic plasticity of Schistocerca gregaria
    In this axis, we are trying to understand deeper the processes linked to phase polyphenism of desert locust. 

    • In 2011-2012 a first project in collaboration with Marie-Pierre Chapuis, Christine Pagès and Benjamin Pélissié, showed us some parental and heritable effects of some growth-related individual parameters.
    • Since 2012, I'm collaborating with Koutaro Maeno to test maternal effects on survival and behavior of hatchlings.
    • Since 2014, I'm co-supervisor of Jamila Dkhili, PhD candidate at the Ibn Zohr University of Agadir, who is working on vegetation effect on group behavior of desert locusts hoppers. We are using Individual-Based Models and laboratory experiments.

  2. Modeling of gregarization risk of Schistocerca gregaria
    In this axis, we link environment, population levels and phase of desert locust in order to develop tools that could help in preventive management.

    • In 2010-2012, a first project in collaboration with Valentine Lebourgeois, Michel Lecoq and other team members analysed NDVI/MODIS maps and time series coupled with survey data from the national center of locust control of Mauritania (CNLA). This work proposed a methodology to spatially show the potential gregarization risk of desert locust from satellite images.
    • In 2014, a project for the Centre Royal de Télédétection Spatiale of Morocco allowed to improve the methodology and make it an operational tool for the National Anti-locust center of Morocco.
    • In 2012-2014, I worked with Sory Cissé, a PhD student from Mali under a grant from CLCPRO/FAO, who was studying density thresholds of gregarization from historical data and field observations.
    • Since March 2015, we work with IsardSAT and CESBIO on a project about soil moisture financed by ESA: the SMELLS project.

I hope also to work with Greg Sword, Hojun Song and Alexandre Latchininsky on risk modelling for other species of locusts.




  1. Meynard, C. N., P.-E. Gay, M. Lecoq, A. Foucart, C. Piou, and M.-P. Chapuis. 2017. Climate-driven geographic distribution of the desert locust during recession periods: Subspecies’ niche differentiation and relative risks under scenarios of climate change. Global Change Biology. Sous presse. DOI
  2. Lazar, M., C. Piou, B. Doumandji-Mitiche, and M. Lecoq. 2016. Importance of solitarious desert locust population dynamics: lessons from historical survey data in Algeria. Entomologia Experimentalis et Applicata 161:168–180. DOI
  3. Latchininsky, A., C. Piou, A. Franc, and V. Soti. 2016. Applications of Remote Sensing to Locust Management. Pages 263-294 in N. Baghdadi and M. Zribi, editors. Land Surface Remote Sensing: Environment and Risks. ISTE editions.
  4. Cissé, S., S. Ghaout, M. A. Babah Ebbe, S. Kamara, and C. Piou. 2016. Field Verification of the Prediction Model on Desert Locust Adult Phase Status From Density and Vegetation. Journal of Insect Science 16. DOI (open access)
  5. Pélissié, B., C. Piou, H. Jourdan-Pineau, C. Pagès, L. Blondin, and M.-P. Chapuis. 2016. Extra Molting and Selection on Nymphal Growth in the Desert Locust. PLoS ONE 11:e0155736. DOI (open access)
  6. Chapuis, M. P., C. Plantamp, R. Streiff, L. Blondin, and C. Piou. 2015. Microsatellite evolutionary rate and pattern in Schistocerca gregaria inferred from direct observation of germline mutations. Molecular Ecology 24:6107-6119. DOI
  7. Piou, C., M. H. Taylor, J. Papaïx, and E. Prévost. 2015. Modelling the interactive effects of selective fishing and environmental change on Atlantic salmon demogenetics. Journal of Applied Ecology 52:1629-1637. DOI
  8. Cisse, S., S. Ghaout, A. Mazih, H. Jourdan-Pineau, K. O. Maeno, and C. Piou. 2015. Characterizing phase-related differences in behaviour of Schistocerca gregaria with spatial distribution analysis. Entomologia Experimentalis et Applicata 156:128-135. DOI
  9. Cisse, S., S. Ghaout, A. Mazih, M. A. Ould Babah Ebbe, and C. Piou. 2015. Estimation of density threshold of gregarization of desert locust hoppers from field sampling in Mauritania. Entomologia Experimentalis et Applicata 156:136-148. DOI
  10. Delay, E., C. Piou, and H. Quenol. 2015. The mountain environment, a driver for adaptation to climate change. Land Use Policy 48:51-62. DOI
  11. Vogt, J., C. Piou, and U. Berger. 2014. Comparing the influence of large- and small-scale disturbances on forest heterogeneity: A simulation study for mangroves. Ecological Complexity 20:107-115. DOI
  12. Maeno, K. O., C. Piou, M. A. Ould Babah, and S. Nakamura. 2013. Eggs and hatchlings variations in desert locusts: phase related characteristics and starvation tolerance. Frontiers in Physiology 4. DOI
  13. Cisse, S., S. Ghaout, A. Mazih, M. A. O. Babah Ebbe, A. S. Benahi, and C. Piou. 2013. Effect of vegetation on density thresholds of adult desert locust gregarization from survey data in Mauritania. Entomologia Experimentalis et Applicata 149:159-165. DOI
  14. Piou, C., V. Lebourgeois, A. S. Benahi, V. Bonnal, M. e. H. Jaavar, M. Lecoq, and J.-M. Vassal. 2013. Coupling historical prospection data and a remotely-sensed vegetation index for the preventative control of Desert locusts. Basic and Applied Ecology 14:593-604. DOI
  15. Feller, I., A. Chamberlain, C. Piou, S. Chapman, and C. Lovelock. 2013. Latitudinal Patterns of Herbivory in Mangrove Forests: Consequences of Nutrient Over-Enrichment. Ecosystems 16:1203-1215. DOI
  16. Maeno, K. O., C. Piou, S. Ould Ely, M. A. O. Babah, B. Pélissié, S. A. Ould Mohamed, M. E. H. Jaavar, M. Etheimine, and S. Nakamura. 2013. Plant Size-dependent Escaping Behavior of Gregarious Nymphs of the Desert Locust, Schistocerca gregaria. Journal of Insect Behavior 26:623-633. DOI
  17. Piou, C. and E. Prévost. 2013. Contrasting effects of climate change in continental versus oceanic environments on population persistence and micro-evolution of Atlantic salmon. Global change biology 19:711-723. DOI
  18. Maeno, K. O., C. Piou, S. O. Ely, S. A. O. Mohamed, M. E. H. Jaavar, M. A. O. Babah, and S. Nakamura. 2012. Field Observations of the Sheltering Behavior of the Solitarious Phase of the Desert Locust, Schistocerca gregaria, with Particular Reference to Antipredator Strategies. Japan Agricultural Research Quarterly 46:339-345. PDF
  19. Piou, C. and E. Prévost. 2012. A demo-genetic individual-based model for Atlantic salmon populations: Model structure, parameterization and sensitivity. Ecological Modelling 231:37-52. DOI
  20. Vogt, J., A. Skóra, I. C. Feller, C. Piou, G. Coldren, and U. Berger. 2012. Investigating the role of impoundment and forest structure on the resistance and resilience of mangrove forests to hurricanes. Aquatic Botany 97:24-29. DOI
  21. Fontalvo-Herazo, M., C. Piou, J. Vogt, U. Saint-Paul, and U. Berger. 2011. Simulating harvesting scenarios towards the sustainable use of mangrove forest plantations. Wetlands Ecology and Management 19:397-407. DOI
  22. Bal, G., E. Rivot, E. Prévost, C. Piou, and J. L. Baglinière. 2011. Effect of water temperature and density of juvenile salmonids on growth of young-of-the-year Atlantic salmon Salmo salar. Journal of Fish Biology 78:1002-1022. DOI
  23. Tentelier, C. and C. Piou. 2011. Obstacles to migration constrain nest distribution of Atlantic salmon. Ecology of Freshwater Fish 20:400-408. DOI
  24. Piou, C., U. Berger, and K. Diele. 2010. Simulating Ucides cordatus Population Recovery on Fished Grounds. Pages 299-303 in U. Saint-Paul and H. Schneider, editors. Mangrove Dynamics and Management in North Brazil. Springer Berlin Heidelberg. DOI
  25. Feller, I., C. Lovelock, and C. Piou. 2009. Growth and Nutrient Conservation in Rhizophora mangle in Response to Fertilization along Latitudinal and Tidal Gradients. Smithsonian Contributions to the Marine Sciences 38:347-358. PDF
  26. Piou, C., U. Berger, and V. Grimm. 2009. Proposing an information criterion for individual-based models developed in a pattern-oriented modelling framework. Ecological Modelling 220:1957-1967. DOI
  27. Piou, C., U. Berger, and I. Feller. 2009. Spatial structure of a leaf-removing crab population in a mangrove of North-Brazil. Wetlands Ecology and Management 17:93-106. DOI
  28. Piou, C., U. Berger, H. Hildenbrandt, and I. Feller. 2008. Testing the intermediate disturbance hypothesis in species-poor systems: A simulation experiment for mangrove forests. Journal of Vegetation Science 19:417-424. DOI 
  29. Berger, U., V. Rivera-Monroy, T. Doyle, F. Dahdouh-Guebas, N. Duke, M. Fontalvo-Herazo, H. Hildenbrandt, N. Koedam, U. Mehlig, C. Piou and R. Twilley. 2008. Advances and limitations of individual-based models to analyze and predict dynamics of mangrove forests: A review. Aquatic Botany 89:260-274. DOI 
  30. Berger, U., C. Piou, K. Schiff ers, and V. Grimm. 2008. Competition among plants: Concepts, individual-based modelling approaches, and a proposal for a future research strategy. Perspectives in Plant Ecology, Evolution and Systematics 9:121-135. DOI
  31. Piou, C., U. Berger, H. Hildenbrandt, V. Grimm, K. Diele, and C. D'Lima. 2007. Simulating cryptic movements of a mangrove crab: Recovery phenomena after small scale fi shery. Ecological Modelling 205:110-122. DOI 
  32. Piou, C., I. Feller, U. Berger, and F. Chi. 2006. Zonation patterns of Belizean o ffshore mangrove forests 41 years after a catastrophic hurricane. Biotropica 38:365-374. DOI 
  33. Grimm, V., U. Berger, F. Bastiansen, S. Eliassen, V. Ginot, J. Giske, J. Goss-Custard, T. Grand, S. Heinz, G. Huse, A. Huth, J. U. Jepsen, C. Jorgensen, W. M. Mooij, B. Mueller, G. Pe'er, C. Piou, S. F. Railsback, A. M. Robbins, M. M. Robbins, E. Rossmanith, N. Rüger, E. Strand, S. Souissi, R. A. Stillman, R. Vabo, U. Visser, and D. L. DeAngelis. 2006. A standard protocol for describing individual-based and agent-based models. Ecological Modelling 198:115-126. DOI

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