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A female zebra mussel begins to reproduce within 6–7 weeks of settling. [17] An adult female zebra mussel can produce 30,000 to 40,000 eggs in each reproductive cycle, and over 1 million each year. [18] Free-swimming microscopic larvae, called veligers, drift in the water for several weeks and then settle onto any hard surface they can find ...
The zebra mussels can use up all the food in the vicinity and deplete the oxygen, and may also consume the native mussels' larvae and sperm, preventing reproduction. Deposits of waste products degrade the habitat. [7] Other invasive species include the Asian clam (Corbicula fluminea), which competes with the native mussel and consumes its sperm ...
A mussel (genus Mytilus), attached to a rock by its byssus Illustration of the byssus of Dreissena polymorpha, the freshwater zebra mussel. A byssus (/ ˈ b ɪ s ə s /) is a bundle of filaments secreted by many species of bivalve mollusc that function to attach the mollusc to a solid surface.
The Iowa Department of Natural Resources confirmed zebra mussels, an invasive species, were found in Saylorville Lake.
The quagga mussel resembles the zebra mussel, just as its namesake (quagga) resembles the zebra. The quagga mussel shell can be distinguished from the zebra mussel shell because it is paler toward the end of the hinge. It is also slightly larger than the zebra mussel, about 20 mm (0.8 in) wide, roughly about the size of an adult human's thumbnail.
The most common types of dreissenids are Dreissena polymorpha (Zebra mussel) and Dreissena rostriformis (Quagga mussel). [14] These mussels damage both ecological systems and human infrastructure. In North America, biofouling caused by dreissenids created 267 million dollars’ worth of damage between 1989 and 2004. [ 14 ]
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The incorporation of the round goby into native foodwebs, coupled with the goby's ability to consume large numbers of invasive mussels (zebra and quagga), may result in greater bioaccumulation of toxins such as PCBs higher in the food chain, since these mussels filter-feed and are known to accumulate persistent contaminants. However, this is ...