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.
Like salmon, lampreys were hard hit by the dam construction boom of the â50s and â60s. Within a few decades lamprey populations had shrunk dramatically, though they could still be found in some places like Eight Mile Creek, where Washines remembers catching half a burlap sack-full in the mid-1960âs.