Did the sea lamprey cause a decline in the trout population?

      The sea lamprey caused a decline in the trout population.

I know this because the sea lamprey had a lot of food to eat. This is because the sea lamprey were eating the trout. According to a graph about the trout population, the trout population was about 300 around the 1940s and 1950s but decreased to about 50 in the 1960s. On the other hand, according to a graph about the sea lamprey population, the sea lamprey population was about 50 in the 1940s and 1950s, but increased to about 300 in the 1960s.  The sea lamprey population went up the same time the trout population went down in the 1960s. Which is because it had a lot of trout to eat. This indicates that the trout population declined because they were being eaten by the sea lamprey.

 

      We found out that the sea lamprey are fish without jaws, which means they grab on to fish and suck they’re blood. According to reading 7.2, the sea lamprey leaves a mark after they attack, and the mark they leave has been found on several trout since the sea lamprey came.  The fact this mark has been found on so many trout means that lots of trout have been killed or weakened because the sea lamprey attacked them. This means that the sea lamprey have been attacking the trout, which is declining the trout population.

 

      From dissecting, we found out that the sea lamprey are S-swimmers, which means they’re flexible and move through the water fast, like how you picture an eel swimming, which is in the shape of an “S”. The trout are half body swimmers, which means they only swim with half of they’re body(obviously) and are not as flexible and fast like the sea lamprey. This would make them an easy target for the sea lamprey.  This indicates that the trout would have a hard time out swimming the sea lamprey, who will attack the trout once they catch it. I rest my case.