|
Showing 1 - 2 of
2 matches in All Departments
A detailed tracing, from acceptable sources, of archaeological and
paleontologi cal discoveries made up to the present time leads us
to suppose that approximate ly in 8000 y B. C., in Southern
Turkestan, man succeeded in domesticating the first cattle, which
he later took with him as he migrated from this remote region of
Central Asia. Step by step, Europe and Asia have been gradually
inhabited by domesticated cattle which have been incorporated into
man's economy, both as a source of food and work. The same happened
in America and Australasia, continents where cattle were taken by
the European colonizing groups during the course of the 16th to the
18th centuries. Possibly the common cattle tick also reached these
continents at the same time, accompanying its most frequent host.
The cattle tick, Boophilus microplus, parasitizes Asiatic cattle
races (with spe cial reference to the zebu, Bos indicus), but
generally the level of infestation is not high, only a few engorged
females being detected, generally no more than ten. When cattle of
European races are infested by Boophilus microplus, how ever, the
level of parasitism is higher, sometimes reaching limits
incompatible with the life of the host."
|
You may like...
Loot
Nadine Gordimer
Paperback
(2)
R383
R310
Discovery Miles 3 100
Loot
Nadine Gordimer
Paperback
(2)
R383
R310
Discovery Miles 3 100
Fast X
Vin Diesel, Jason Momoa, …
DVD
R172
R132
Discovery Miles 1 320
|
Email address subscribed successfully.
A activation email has been sent to you.
Please click the link in that email to activate your subscription.