Bots and Simulations > Simulation Emporium
Maca's ecosystem challenge
Testlund:
I've actually done pretty much what you describe way back. I think you can have max 9 species in the list. I started with each species in there own square around the borders and found that the best bot was R_Fisannis. Animal_Minimalis came second. Also I found those two are the best beginner bots for when you first want to get aquainted with the program.
I think it was last year I tried this but since the program has changed so much it might be interesting to try it again to see how those old bots would manage now.
Endy:
I've managed to do something like that using a self-made autotroph(limited free nrg bug, in older vers) and a sharer/body feeder. The free nrg bot has to be along the edges for it to work so it's limited in its spread and is serving as food for the other species.
The sheer population pressures cause cannibots to form in particularly crowded areas and helps to keep down the sharer's population levels. Right now I'm trying to add in additional species in the more vacant regions to see if I can't work additional species into the ecosystem.
shvarz:
My current internet-enabled sim has been running for over 2 million cycles with evolving multiply(shvarz) and Lionfish1.5. Sometimes one wins, sometimes another, but so far it's been very stable with neither species going extinct.
EDIT: Which actually is very interesting. Population genetics theory states that this is extremely unlikely and that one of the species should have displaced the other by this time. Why that did not happen?
Theory 1: shvarz(multiply) is actually better adapted to the sim conditions, while Lionfishes often come from other people's sims and they are unsuccessful invaders.
Theory 2: The sim's conditions favor a bot that is in low numbers and allow it survive with no competition from the dominating bot. This may be due to patchiness of food in the sim (although I don't really see it just by looking at the sim).
Any other ideas?
EDIT 2: Damn, I jinxed it! After all these cycles, Lionfish went extinct....
Anyone interested in some recent saves of this? I save every 2 hours, so about 20-hr-old sim should still be there.
EricL:
--- Quote from: Testlund ---I think you can have max 9 species in the list.
--- End quote ---
It's 75 species max now in current buddy drop builds. I'd increase it further, but I am hitting an internal VB limit on the simopts structure size. Likely I will cap it there for native species and do as Nums suggests on a separate thread and keep imported species from intenet mode in a different structure...
EricL:
--- Quote from: shvarz ---My current internet-enabled sim has been running for over 2 million cycles with evolving multiply(shvarz) and Lionfish1.5. Sometimes one wins, sometimes another, but so far it's been very stable with neither species going extinct.
--- End quote ---
You know better than I that we have to be careful with the term "species" in DB when mutations are invovled and with asexually reporducing organisms in general. Taking a look at the species diversity graph may shed some light on how related the organisms of a single "species" really are. I would like to add more enhancements in this area that can provide greater insight into diversification e.g. a graph which charts the average genetic distance between organisms. I would greatly appreciate your expertise in making suggestions along these lines...
--- Quote from: shvarz ---Any other ideas?
--- End quote ---
I have seen stabalizing selection favor sims with multiple "species" in sims with autocosts. I.e. costs going up favor one species, costs going down favor the other, a stable co-existance emerges as they battle, with neither one able to exterminate the other since the environmental costs work against them as they become dominate.
--- Quote from: shvarz ---EDIT 2: Damn, I jinxed it! After all these cycles, Lionfish went extinct....
--- End quote ---
There's still some in mine. Wait a little bit...
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