Pistia-stratiotes
Guides
Mansonia titillans
Mansonia titillans is a neotropical mosquito species in the tribe Mansoniini. It is the most abundant Mansoniini species in central Florida phosphate regions and has shown recent northern range expansion into South Carolina. The species is distinguished by its unique underwater oviposition behavior, where females deposit eggs on the undersurfaces of aquatic plant leaves. Larval development occurs in association with floating vegetation, particularly water lettuce (Pistia stratiotes) and water hyacinth (Eichhornia crassipes).
Pacifastacus leniusculus
Signal Crayfish
The signal crayfish is a large North American freshwater crayfish introduced to Europe in the 1960s to replace declining native fisheries. It has become one of the most ecologically impactful invasive decapods in Europe, outcompeting native crayfish and serving as a carrier of crayfish plague (Aphanomyces astaci). The species establishes self-sustaining populations rapidly, with six age cohorts documented within a few years of introduction. It shows sex- and size-specific coloration patterns, with males displaying more saturated and brighter ventral claw surfaces than females, suggesting a role in intraspecific communication.
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