Although Clostridium perfringens Type B is not considered a significant problem in the U.S.A., immunity may be provided against the beta and epsilon toxins elaborated by Cl. perfringens Type B. The immunity is derived from the combination of Type C (beta) and Type D (epsilon) fractions.
What do sea lampreys eat? A: Sea lampreys feed off the blood of large fish, including trout, salmon, whitefish, carp, catfish and sturgeon. The sea lamprey is native to the Atlantic Ocean but infiltrated the Great Lakes region in the 1920s and '30s during canal construction.
During that time, sea lamprey will become mature and it will return back to fresh water for spawning. Spawning takes place in the spring. Sea lamprey can deposit as much as 100 000 eggs in the stony nests. Sea lampreys will die immediately after spawning. A lot of eggs deposited by sea lamprey serve as food for other fish in the water.