Voortplantingssucces van de rugstreeppad in een intensief gebruikt agrarisch landschap

In 2006 and in 2007 the reproductive success of the natterjack toad was studied in the agricultural landscape of the North-eastern Polder in Flevoland, The Netherlands. Transect surveys were done and the egg to juvenile development was monitored at 33 locations. Reproduction was observed in ditches, (garden) ponds, marshes, basins and rain puddles. No reproduction activity was found in canals. Of all monitored 33 locations, successful reproduction (defined as at least one juvenile toad leaving the water) was observed at 25 locations (76%). Ten of these 25 locations were ditches, the other 15 were spread over the other water types. The chances for successful reproduction are lowest in ditches, however this is where at least 75% of the population of natterjack toads occurs in the North-eastern polder, meaning that measures for the improvement of ditches will have a large impact on the total natterjack population.