Exactly. However, it would be quite silly if we were to state that if, for example, you were part ant, you would be unable to pick up anything heavier than a leaf. You're a lot friggin bigger than an ant, and thus the strength is comparative.
Basically, I'm attributing the strength of a human-sized Rhinoceros beetle to Tsukune, which is going to be his human weigh x850. I think you can see the problem, however.