Dear Shaw-

Did you publish any of your results on your work with flock size, 
inbreeding, and domestic turkeys in the American Southwest? I'm 
interested in similar information as it might apply to rabbits.

Heather

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Heather A. Lapham, Ph.D.
Associate Scientist (Curator), Center for Archaeological Investigations
Adjunct Associate Professor, Department of Anthropology
Faner 3479 - Mail Code 4527
Southern Illinois University Carbondale
1000 Faner Drive
Carbondale, Illinois 62901

Office: (618) 453-5033
Lab: (618) 453-2036
E-mail: [log in to unmask]
Web: http://www.siu.edu/~cai

At 12:40 PM 11/10/2008, Shaw Badenhorst wrote:
>Dear Jaccqui,
>
>I have tried to address minimum herd sizes of cattle (and caprines) in
>southern Africa.
>
>According to Schapera (1962:23), at least 10 head of cattle is said to be
>the minimum size of a herd to yield an annual disposable surplus. He worked
>on Tswana farmers in South Africa and Botswana.
>
>I concur. I have also seen that farmers in rural South Africa actually keep
>only a few heads of cattle, sheep and goats, although I don't have any data
>available on this (it would be an interesting project to get some actual
>numbers….). Many papers also point out that farmers and pastoralists only
>need a few animals to yield a surplus.
>
>A potential issue with small herds/flocks would be inbreeding. However,
>there would be two ways to get around this problem. First, there are
>different forms of inbreeding, and a farmer can manage it very effectively
>within a small herd or flock by choosing different strategies or forms of
>inbreeding. There is a large literature on the different forms of inbreeding
>in domestic animals.
>
>Second, although inbreeding causes various defects over a few generations in
>domestic animals, the simplest way to get rid of these would be to introduce
>new, unrelated individuals (through exchange, raiding, bridewealth payments,
>etc).
>
>Herd and flock sizes can be modeled, as Dahl and Hjort attempted for cattle.
>I recently tried to do it for domestic turkeys in the American Southwest.
>Also see the Newman paper below for sheep.
>
>A few useful references on small cattle and caprine herd sizes (mostly
>summarised in my own paper, which I will send you a PDF separately):
>
>Badenhorst, S. 2008. Subsistence change among farming communities in
>southern Africa during the last two millennia: a search for potential
>causes. In: Badenhorst, S. Mitchell, P. & Driver, J. C. (eds) Animals and
>People: Archaeozoological Papers in Honour of Ina Plug, 215-228. Oxford:
>British Archaeological Series 1849.
>
>Schapera, I. 1962. The Tswana. London: International African Institute.
>
>Braker, M. J. E., H. M. J. Udo and E. C. Webb. 2002. Impacts of intervention
>objectives in goat production within subsistence farming systems in South
>Africa. South African Journal of Animal Science 32(3):185-191.
>
>Newman, E. I. 2002. Medieval sheep-corn farming: how much grain yield could
>each sheep support? Agricultural History Review 50(2):164-180.
>
>Sieff, D. F. 1997. Herding strategies of the Datoga pastoralists of
>Tanzania: is household labor a limiting factor. Human Ecology 25(4):519-544.
>
>Sutter, J. W. 1987. Cattle and inequality: herd size differences and
>pastoral production among the Fulani of northeastern Senegal. Africa
>57(2):196-218.
>
>All best,
>Shaw
>
>
>Dr. Shaw Badenhorst
>Department of Archaeozoology
>Transvaal Museum
>PO Box 413
>Pretoria
>0001
>South Africa
>
>
>On Mon, 10 Nov 2008 11:51:38 +0000 [log in to unmask] wrote:
> > Another general query.....any suggestions?
> >
> > Dear Jacqui,
> >
> > A collegue has asked me to enquire from you if you know the source of
> > a quote that crofters would need 50 sheep in order to survive a year.
> > If you have any figures on how many sheep, cows and bulls were
> > consderd the minimum by such farming groups that would be appreciated.
> > He is trying to work out how much livestock Neolithic farmers might
> > have needed in order to survive a year.
> >
> > Many thanks.
> >
> > Best wishes,
> >
> > Paul.
> >