The three-spined stickleback Gasterosteus aculeatus invaded Lake Contance in the 1940s and expanded in large numbers from an exclusively shoreline habitat into the pelagic zone in 2012. Stickleback abundance is very high in the pelagic zone in winter near the spawning time of pelagic whitefish Coregonus wartmanni. and it is hypothesized that this is triggered by the opportunity to con... https://parisnaturalfoodes.shop/product-category/digest-aid/