From 1994 to 2000, he served as one of four fisheries management research and recommendations and for sea lamprey control for the Great Lakes fisheries.
32.
Sea lampreys parasitize other fishes for their diet, including elasmobranchs such as sharks and rays which have naturally high levels of urea in their blood.
33.
The six lakes also have identical rock formations, flora and fauna and similar environmental plagues, among them zebra mussels, sea lamprey, phosphorus runoff and mercury pollution.
34.
Corsydd Llangloffan SSSI is within the Cleddau Rivers Special Area of Conservation ( cSAC ) for otter, river lamprey, brook lamprey, sea lamprey and water crowfoot.
35.
The sea lamprey, which has been particularly damaging to the native lake trout population, is another example of a marine invasive species in the Great Lakes.
36.
Supporters say the bill will keep out foreign species such as the sea lamprey, ruffe and zebra mussel that are wrecking havoc on marine ecology and industries.
37.
The substance was discovered in 1958 when researching means to combat sea lampreys and it remains the primary lampricide ( lamprey-killer ) in the Great Lakes area.
38.
As for other Great Lakes fish, populations have also been affected by the accidental or intentional introduction of foreign species such as the sea lamprey and Eurasian ruffe.
39.
In contrast, the sea lamprey inflicts deep rasping wounds, and the muscle damage and loss of blood commonly weaken the host severely, affecting its reproduction or killing it.
40.
The end of a successful program to rid Lake Champlain of parasitic sea lampreys means anglers are once again hauling out fish that show obvious signs of attacks.
