Temporal variation in pond use and breeding success for ducks in French fishpond regions: on possible consequences of a decline in fish farmingJ. Broyer, F. Bourguemestre, G. Chavas and R. ChazalKnowl. Manag. Aquat. Ecosyst., 416 (2015) 31DOI: https://doi.org/10.1051/kmae/2015027