What you can do also apply to 13 meters, New Zealand, the birds that have died in the town for 500 years and modern Wyoming trout species? And what, you can also ask, as requested in the mood to do snails have to do with any of it? Well, the answer is "almost, really." It 's a bit complicated, but bear with me.
In something like the year 1500 CE Maori ancestors of Polynesians in what is now known as New Zealand reached. They were a completely new speciesfor the islands, without the prior place in the ecosystem. As a result of local prey species, especially the huge domestic birds called Moa, had no natural defenses against them. Moa were flying not only that they were completely wingless. Their only natural enemies on the island was a 30-pound eagle (and later the proto Maori hunted to extinction), so were the not-so-fast feet as much sense for the period-80 Killing Machine mph can not fly. Their onlyDefense against soil-predation was their large size, that man has always been not much has been given anything (Isle of whaling nations in wooden canoes through adult chickens are almost worried). The end result is that all the giant flightless birds of New Zealand is currently on display in museums of natural history end in the world.
But what has to do with snails?
Enter Potamopyrgus antipodarum, the New Zealand Mud Snail. These small,Aquatic organisms, mussels are freshwater fish migration, New Zealand, not in, but their effects on an ecosystem, they have no place in previous similar effects on native species may have. Performed by us people around the world trot, the creatures made its debut in North America in 1980 in the Snake River, and have since drifted west. You are now in Wyoming, Yellowstone National Park.
As these tiny invaders hop from river to river, from lake to lake effectEstablishing a nearly indestructible as they go? People again, I fear. New Zealand Mud Snail likely to boats and fishing gear hitch. Thus, a fisherman in a negligent or disorderly extended trip to the little devils out there.
Mud snails are quite strong enough to make the trip as well. They are so small (6 mm in length, maximum, and sometimes as small as a grain of rice), and seem to many small patches of mud that often have gone unnoticed. You canThe continued availability of water for several days and can live in many kinds of environments freshwater. They are also quite resistant to low temperatures (slightly above the freezing point can handle) to pass through the digestive tract and most of the fish unharmed. Moreover, they reproduce asexually, and are "livebreeders", ie, produce a series of perfectly formed small clones, we can also spawn a colony.
Zealand mud snail density of more than half a million snails per square meterwere found in Yellowstone Park. In the absence of natural predators to control them, there are all possibilities for native species will snail out of the race for the extinction of species of native plants and is overwhelmed. This balance can lead to other species such as trout decimate presence, something that gives the Fish and Wildlife Department Colorado and Wyoming dedicated fisherman reason for pause.
Efforts will be made for the invasion of New Zealand mud snail sidewalks. We hope that the trout aremore luck than the Moa.
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