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Author Topic:   Noah's Ark
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Member (Idle past 5064 days)
Posts: 272
Joined: 11-17-2005


Message 285 of 302 (271917)
12-23-2005 2:19 AM
Reply to: Message 252 by arachnophilia
12-16-2005 12:25 AM


Re: Anybody up for some sums?
Well to be truthful a linear equation describing speciation in my opinion would be intelletually dishonest, mostly because populations don't follow linear rates of growth. But understandable to using a linear module because it is the easiest model to describe.
So if we were to assume speciation as an exponential function where
f(x) = 16000(1.001095)^x where x represents time.
Where 1.001095 is extrapolated because 16000 land "kinds" turn into 427,000 land species. We now have an equation that adequately describes the fact that populations are not linear.
However of course there is a flaw in this description because then it demonstrates that the rate of mutation is changing as time is changing. (YECs may believe this is a wonderful thing however, the rate at which speciation is occuring does not match up to observed life)
So again we do a little bit of calculus and we find that the rate of change
f'(x)= 17.5156*(1.001095)^x
which represents the number of speciation events as time changes
plug in 3000 for x into the rate equation and we get a nice round number of:
467 speciation events occuring per year after 3000 years. WOW!!
Course all of this is pure speculation but i think that 427 speciation events occuring like this would indicate a much higher rate of new species discoveries then currently occuring.
Bringing caclulus to new levels of fun.

This message is a reply to:
 Message 252 by arachnophilia, posted 12-16-2005 12:25 AM arachnophilia has replied

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Member (Idle past 5064 days)
Posts: 272
Joined: 11-17-2005


Message 292 of 302 (274334)
12-31-2005 3:36 AM
Reply to: Message 287 by NotSoBlindFaith
12-30-2005 7:56 PM


Re: Perfect?
Please do not use arachnophilia's numbers of 1 new species every year or so. The logistic equation for population growth shows that an average growth rate is increasingly unacceptable form for growth rate. Populations are NOT a linear system. Thus you must use an exponential growth.
And as an earlier post i wrote out mentioned (post 285) at roughly this time we should have aproximatly 467 speciation events every year. in terms of the number of new animals that should be occuring since the time of the ark. And this is just with land animals alone.
At the population genetics you are proposing i'm surprised the rats in my garage aren't turning into gargantuan killer rats right in front of my eyes.
Do not play with population math unless you know the way the math actually works please.

This message is a reply to:
 Message 287 by NotSoBlindFaith, posted 12-30-2005 7:56 PM NotSoBlindFaith has not replied

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