Good point. Eating at McDonald's less often probably wouldn't have helped the Inca's and Aztec's avoid smallpox when the Spaniards dropped in for a visit.
That is true, but eating less at McDonalds would allow the Inca's to run away from the Spaniards faster. Then, when the Inca watched the Spaniards, who were now fat from all those Happy Meals, trying to run away with all that heavy gold, the Inca could have stood behind trees and tripped the Spaniards as they came by. If that were to happen, we may all be speaking Incaneeze now.
Jen, I actually agree with your post.

I do also have a "theory" as to how fish can cope with the extra heavy parasite load in a smaller tank than the ocean. I only "think" this because of my fishes seeming immunity.
I "think" in a tank, fish would develop a stronger immunity from parasites due to the large number of parasites they may be exposed to as opposed to being in the ocean. That is one theory. I also have another "theory". I have lots of theories.
In a tank, especially an older tank where the fish have some sort of immunity, I feel the parasites will never get to plague proportions because the immunity on a fish, especially on their slime won't allow large numbers of parasites to breed, thus lessening the parasite load in a tank.
In my tank for instance where I "believe" the fish are immune. When I add a new fish, rarely I will see a couple of parasites for a couple of days. Then the fish will be free of any spots for the remainder of it's life until it dies of (usually) old age. I would assume, if there was a huge parasite load in my tank any new fish would immediately succumb to the parasites. But that is never the case.
3 weeks ago I added an orange spotted file fish, which was almost dead when I got it. 2 months ago I added a clingfish. A year ago I added 3 shrimpfish. Two of the shrimpfish were fine, the third shrimp fish died in a day and was covered in parasites. I left him in the tank for the bristleworms to eat. I have not seen any new parasites and I have about 25 fish in my tank.
I add fish all the time, sometimes I get them for free because the store knows they dill die soon because either they are covered in parasites, not eating or they just can't sell them. I recently got a copperband like that for $5.00.
I also add mud from here a few times a year just for the bacteria, and presumably the parasites, but that is a guess if any parasites are in there,
OK forget the pictures for now as Photobucket is down for maintenance so I can't add pictures. Make believe there is a picture of mud here in a tide pool in the Long Island Sound covered in snails and mussels.
