GURPS: Ecosystems and Evolution

[MagiMaster]

Someone on a different forum said that a tarantula fed 25% of its body weight once a month would grow, so that's about 1% per day on average. The tables above give about 6.5% per day. (I'm assuming the tarantula weighs 0.15 lbs.) So these numbers don't quite work right, but I don't know which ones need the most work. Does anything look off to anyone else?

Edit: Updated the tables with some better numbers. Tarantulas get about 3% now, which is probably close enough, even though using this would predict about 1/3 the population. I need to look back over things and see what's left. I'm getting some help on another forum for the thermal to watts question. I still need to write up the FP used to hunt question, but I have some ideas there. Is there anything else I need to add?

Edit again: I think the right equation for thermal energy is 1,700,000*(Th - Tc)*(area in mile^2)/(height in ft)*(1-sqrt(Tc/Th)). So the previous example of 200F to 50F would give about 47.5 million watts now (with a 20 ft ceiling), instead of 270 million. I think that's a bit more reasonable. I might need to find some way to simplify that though.