[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

*To*: Yasmani Ceballos Izquierdo <yceballos@uci.cu>*Subject*: RE: Matematical model of dinosaur population.*From*: Martin Baeker <martin.baeker@tu-bs.de>*Date*: Sun, 22 Feb 2009 12:08:44 +0100 (CET)*Authentication-results*: msg-ironport1.usc.edu; dkim=neutral (message not signed) header.i=none*Cc*: dinosaur mailing list <dinosaur@usc.edu>*In-reply-to*: <1A668661A3AAA343B3C49E2F266DDAE004B38720@ucixw2.uci.cu>*References*: <1A668661A3AAA343B3C49E2F266DDAE004B38720@ucixw2.uci.cu>*Reply-to*: martin.baeker@tu-bs.de*Sender*: owner-DINOSAUR@usc.edu

On Sat, 21 Feb 2009, Yasmani Ceballos Izquierdo wrote: So you want to use a published mathematical model of a population and just program it? That's surely not a useful thesis topic - if people have published a mathematical model, they are sure to have programmed it themselves, why else would they have created the model if not to calculate something with it. What kind of thesis are we talking about, BTW? Masters? PhD? You can of course take known growth data from some species and see how population size is distributed over age and try to get some mortality data from it - but again, I would expect that if sufficient data are available, someone would have done this. Or you could take a growth-over-age curve like that published by Erickson et al. and see how - assuming different mortality rates, biomass is distributed over age. This, however, is rather simple - I did a quick model of that some time ago and found that with mortality rates of more than 25% or so, the total biomass of Trexes smaller than 1ton would exceed that of adults. But again, I doubt that this is sufficient stuff for a thesis. Hope this helps, Martin. > Ok, then we you know an estimated mathematical model of a single species > of dinosaur, like Coelophysis (rinehart_etal, Growth and population of > Coelophysis, 2008) ??? > > -----Mensaje original----- > De: owner-DINOSAUR@usc.edu [mailto:owner-DINOSAUR@usc.edu] En nombre de > David Marjanovic > Enviado el: Saturday, February 21, 2009 9:58 AM > Para: DML > Asunto: Re: Matematical model of dinosaur population. > > > if I have a mathematical model of the population I can do a simulation > > with some programation's language. > > You seem to have overlooked the rest of my e-mail. Dinosaurs aren't a > single > species, so there is no single population. Besides, we don't know enough > > about the environment and the metabolism of Mesozoic dinosaurs to even > guess > at, say, carrying capacities. How much food was needed to sustain a > population of "*Omeisaurus maoianus*"? We have no idea. > > Priv.-Doz. Dr. Martin BÃker Institut fÃr Werkstoffe Technische UniversitÃt Braunschweig Langer Kamp 8 38106 Braunschweig Germany Tel.: 00-49-531-391-3073 Fax 00-49-531-391-3058 e-mail <martin.baeker@tu-bs.de>

**Follow-Ups**:**RE: Matematical model of dinosaur population.***From:*Yasmani Ceballos Izquierdo <yceballos@uci.cu>

**RE: Matematical model of dinosaur population.***From:*Yasmani Ceballos Izquierdo <yceballos@uci.cu>

**References**:**RE: Matematical model of dinosaur population.***From:*"Yasmani Ceballos Izquierdo" <yceballos@uci.cu>

- Prev by Date:
**Re: my lame cladistic questions** - Next by Date:
**RE: Matematical model of dinosaur population.** - Previous by thread:
**RE: Matematical model of dinosaur population.** - Next by thread:
**RE: Matematical model of dinosaur population.** - Indexes: