ECOWATER TECHNOLOGIES MEXILHAO ZEBRA CONTROLE DE PRAGAS
ESPÉCIES EXÓTICAS INVASIVAS
Dreissena Polymorpha (Mexilhao Zebra )
Zebra mussel (Dreissena polymorpha) is an exotic, invasive species that poses a major threat to our rivers, reservoirs, irrigation systems, hydroelectric power plants, among other systems, both ecologically and socioeconomically.
They obstruct pipes, clog turbines, irrigation channels, etc. Causing problems already encrypted in millions of euros. They also cling to the bottom of ships, causing a loss of speed and increased corrosion.
It feeds on phytoplankton, so it competes with other species not only of mussels, but of all the species that feed on that plankton. Their shells are able to cover the floor, tapestry it with shells, altering drastically its characteristics.
It should be noted that densities of up to 65,000 indiv / m3 have been measured in the Ebro basin. And one can only have 1,000,000 descendants a year.
SELECTIVE, EFFECTIVE AND ECOLOGICAL CONTROL OF DREISSENA POLYMORPHA
AFTER YEARS OF INVESTIGATION ZEQUANOX IS THE MOST EFFECTIVE SOLUTION TO CONTROL THE COLONIZATION OF THE ZEBRA MUSSEL. AFTER DEMONSTRATING HIGH PERFORMANCE IN THE UNITED STATES AND CANADA, THIS EFFECTIVE SOLUTION IS COMING TO SPAIN
We combine technology to eradicate invasive alien species. We have the solution
Size between 3 and 5 cm in length. Oval valves of hard consistency, with marked growth grooves. Color normally in shades
Brown, greenish and / or yellowish. Kind of fast growth, can live up to 7 years.
It occupies sandy bottoms of clear, well-oxygenated streams, rivers and lakes. Does not tolerate contaminated water well. Species of rapid growth, early sexual maturity, short life cycle and high fertility.
They are hermaphrodites. They reproduce sexually. Fertilization occurs within the paleal cavity and the larvae are incubated in the gill tubes.
Life cycle in two phases:
LARGE PHASE: Planktonic larvae, when released into water, have a size of 250 microns. The juveniles are attached to a substrate, vegetation or any hard surface, through the mucilaginous bisual yarn. At this time, they can disperse at great distances driven by turbulence and swept by currents.
The maturation period takes place in the first 3-6 months
ADULT PHASE: Buried or semi-buried in the sandy or gravel beds of rivers and reservoirs can reach concentrations of several hundred or thousands per square meter.
Corbicula fluminea (Asian Clam)
Invasive exotic species characteristic of freshwater aquatic ecosystems. Originally from Asia, Africa and Australia, its expansion has been carried out by large areas of the planet associated with global trade, agriculture, recreational activities and transport.
Like the rest of invasive species, it produces serious alterations in the aquatic ecosystems and serious economic impacts in the zones that colonizes, being one of the main environmental problems that the scientific community faces.
Like the zebra mussel, the introduction and dispersal of Asian clam in aquatic ecosystems is the result of several factors associated with human activity.
DISTRIBUTION IN THE GUADALQUIVIR BASIN
Although no scientific sampling is available to help us establish the exact location of the species in the Guadalquivir Basin, the multiple complaints about the problems caused by its presence in the irrigation communities make us assume a Corbicula distribution is widespread throughout the hydrographic account.
LARGE PHASE: Planktonic and juvenile larvae have a great power of dispersion as they are carried along by currents and in the ballast water of ships. Sometimes, the juveniles are transported adhering to the helmets of the boats or in the feathers and legs of some birds.
ADULT PHASE: In this phase, the dispersion is the result of human activities such as the use of specimens as bait in sport fishing and the release from aquariums, among others.
Originally from Asia, Africa, and Australia, the first documentation of its invasion places it on the Pacific coast of the United States in the early 1920s, possibly introduced by Chinese immigrants.
In Spain it was first detected in the early 1980s in the Miño river basin. It later expanded into the Ebro, Guadiana, Duero and inland basins of Catalonia
ENLACES SOBRE EL MEJILLON CEBRA
Base de Datos Mundial s_obre Especies Invasoras
MAGRAMA. Especies exóticas invasoras