It was first found in the United Kingdom in 1859, the western Baltic in Europe in 1887, the Mediterranean and eastern Europe were invaded in the 1950's. Each snail can produce around 230 offspring a year, and reproduction typically occurs during the spring and summer. New Zealand mud snails are considered a high invasive threat to freshwater and brackish water environments. New Zealand mud snail is a nocturnal grazer that feeds on plant and animal detritus, algae, and diatoms. Consequently, all populations consist of genetically identical clones. These aquatic mollusks are native to streams and lakes of New Zealand and have been making their way across the globe, establishing populations throughout five … In New Zealand, native mud snail populations consist of sexually reproducing populations (the males make up less than 5% of the populations) and asexually reproducing females. 英名：New Zealand mud snail／学名：Potamopyrgus antipodarum 特徴：ニュージーランド原産の殻長（殻の縦の長さ）4～5mmの繁殖力旺盛な淡水性の巻貝。マスやウナギなどの魚とともに移入されたのではないかと考えられてい New Zealand mud snail has had a long invasion history. New Zealand mud snails can reproduce asexually and female snails are born with developing embryos inside them. It is possible that host specific trematodes exist in New Zealand and these may be used to control pest populations of New Zealand mud snail if they can be shown to pose no risk to desirable native snail populations in areas that have been invaded by this pest. The New Zealand mud snail Potamopyrgus antipodarum (Gray, 1843) is colonising the artificial lakes of Kaliningrad City, Russia (Baltic Sea coast). New Zealand mudsnails are difficult for non-specialists to conclusively identify. Although the mud snail is abundant in several streams, it remains absent or uncommon in other Greater Yellowstone streams, suggesting that its upstream population density and distribution is limited by colder temperatures, low productivity, and unstable substrates associated with spring runoff. New Zealand mudsnails are small (an average of 1/8 inches long) and cone-shaped. Scientists studied reproduction in the New Zealand mud snail to answer the question, “Are there benefits to re… Get the answers you need, now! Control of the New Zealand Mud Snail: Since there are no feasible eradication technologies, the first line of defense against New Zealand mud snail is containment. The highest concentration of New Zealand mud snails ever reported was in Lake Zurich, Switzerland, where the species colonized the entire lake within seven years to a density of 800,000 per square meter. Muhlenberg College students are tracking a new invasive species, the New Zealand mud snail, that's in Allentown area waterways and poses a threat to trout and other organisms.