Aquatic Invasive Species

Aquatic invasive species (AIS) are a serious threat to New Hampshire’s waterways. Here are two examples.

• Zebra Mussels: They are about the size of a human fingernail but cause major problems in power plants, in water treatment facilities, and in the cooling systems of vessel engines. A female zebra mussel can produce one million eggs per year. It’s critical that boaters help prevent the spread of zebra mussels.
• Eurasian Watermilfoil: This is a prolific aquatic plant found in many inland lakes in New Hampshire. It interferes with boating, fishing, and swimming; and it displaces native plants. It is easily spread when plant fragments are caught and moved on boat trailers, propellers, anchors, and other equipment, or in live wells. A single fragment of stem or leaves can take root and form a new colony. It’s important that boaters inspect their boats and trailers for these plant fragments and remove them before leaving the waterway.