Short article about the golden
ree of Namibia is a
complex saak.Toe I first started
reference work, I realized
What jumble the genus Oryx
actually, and especially how experts
for many years this difference.
Rowland Ward's Records of Big Game
recognized six varieties: Oryx gazelle gazelle
(Our own deer), Oryx gazella blainei
(Angolan roe), Oryx gazella beisa
(Beisa-oryx) Oryx beisa calottis (Eastern
Africa's so-called fringe-eared oryx)
Oryx dammah (sabelgemsbok) and Oryx
leucoryx (Arabian gazelle). Safari
Club International makes it even more
interesting by Burchellse golden deer
also acknowledged. There is apparently
Now seven variations, not just six non!
It made me ask advice from someone
whose opinion I respect very
because of his knowledge (practical and
book knowledge), Prof J du P Bothma of
Game Farm Management fame.
I am a medical doctor, who as a child
my homework in the field have done and
As a young doctor early afternoon away
to help wildlife veterinarians operate. I
hunting even more than 50 years and spent
as much time as possible in the field to
funny animals, rocks, plants and other
wild good skier. Also collected
I have for years trophy animals. I
therefore a "greenie" who is a hunter!
Bothma me quickly understand
According to the latest
authoritative taxonomic work
is actually really only four types:
Oryx gazella (gemsbok us), Oryx beisa
(The Beisa oryx-two sub-species)
Oryx dammah (the sabelgemsbok) and
Oryx leucoryx (the Arabian gazelle).
The deer and other related species
are all part of the suborder
Ruminantia (ruminants), which is part
form of the Order Artiodactyla (split-
ungulates), approximately 25
million years ago in Eurasia arise
and the decline of sea levels
during ice ages and distributed worldwide
it.
The Artiodactyla's closest related
The whales in oertye and
they occur in Mongolia. The
Ruminantia has estimated that about 23
million years ago in Eurasia arise
and North Africa about 20
million years ago reached a stage
when the former Tethys Sea (now
part of the Mediterranean) was dried
and Africa for continental
power one of his contacts with
Europe had. Then there is a
Permanent ysdek in Antarctica
arising, sea levels temporarily reduced
it. The types of Oryx,
which the deer also, he is
all part of the family Bovidae, a
six families in the Ruminantia.
Eotragus has about 18 million years
ago in Pakistan and had lived
probably an ancestor of Bovidae,
all of which stem from the same phylogenetic
line of herbivores, which is 50
million years back stretch. The largest
development of different species
the Ruminantia only in Eurasia
occurred, followed by a further
development in different species
after they reached Africa.
The ancestor of all species of Oryx
was probably one of several Protoryx-
species, which in fossielbeddings
Turkey, Greece and Pikermi
Tunisia is found.
Protoryx was related to the ancestors of the antelope
(Such as the goat) of the family
Capridae and perhaps
arising from fossielboksoorte Capra
Capra sibirica or aegagrus. An early
ancestor Namibiomeryx could be a
small member of the Bovidae that 20-18
million years ago lived in Namibia
it. It is therefore interesting that when
Carl Linnaeus in his 1758 classification
animal had set, he
Subsequent deer Oryx gazella described
as a gaselagtige goat Capra gazella.
The deer was later renamed to a
kind of antelope when PS Pallas scientific
name changed to 1777
Antilope oryx, and in 1816 it
current name of Oryx gazella at
HMD the Blainville got. Molecular
Genetic evidence shows that the
Damaliscus genus to which the blesbok,
bontebok and tsessebe belong together
by Oryx from the same ancestor
developed and they only
recently phylogenetically separated
it.
What morphological development
concerned, Hamilton in 1973 in his book
Life's Color Code
it summed so that skin color is concerned, "An animal's
coloration is a living record of or
of the most important basis of selection
relative to Predation, communication
and metabolism. Conspicuous
markings can only evolve When there
is no need for concealment. "Certain
Other wildlife also color differences
based on minerals in their
diet, as the sable, which
some areas may sometimes reddish
be. In all the Oryx genus is
too few gender differences in skin color.
The genus Oryx shows a clear trend
in skedelwydte and horn length
from north to south in Africa. The deer
Oryx gazella occurs in southern Africa
before and no subspecies are known
not. It also has the widest skull and
longest horns of any species of Oryx.
The Beisa-oryx, Oryx beisa include
Fringe-eared oryx Oryx as the subspecies
beisa callotis and occurs in North
East Africa, but not in Egypt.
It has the second widest skull and
the third longest horns of any Oryxsoorte.
The dammah or sabelgemsbok
Oryx dammah Neither subspecies not found in North Africa, and was
earlier in Egypt. It was the third
broadest skull and second longest
horns of all kinds of Oryx. The fourth
species is the Arabian Oryx gazelle
leucoryx, in the near Asia
occur earlier in Egypt occurred
and now in North Africa also
occur. It has the smallest skedelbreedte
and shortest of all the horns
Oryx species. The addaks Addax nasomaculatus
is also Oryx and Hippotragus
(The roan and sable)
related and occur in North Afrikaen Egypt before. The reduction or enlargement
related species on their
geographical distribution is taksonomies
as a morphocline known.
One can also find them in the subspecies
buffalo as variations in color, horn shape
and length. It develops due to shifting
environmental conditions
part of the overall habitat.
The first fossils of Oryx is 2.6 to
1.6 million years ago in Eurasia, and 2.6
million years old in Africa. Protoryx the
ancestor of Oryx, is known as fossils
and 14 million years ago
Eurasia and 10.5 million years ago
North Africa lived. Fossils of Oryx
further in the southern Cape found
where 300,000 to 400,000 years
ago lived, and is also found
Olduvai Gorge in-fossielbeddings
in Tanzania, where an unknown
species 2 million to 500,000 years
ago occurred. Fossils of
Oryx is also Pinjor, India found
which probably Oryx sivalensis about
4 to 2.5 million years ago lived
it. The Oryx species in southern and
East Africa is separated
a wet habitat band of about
1600 km wide.
Drawings and hieroglyphs of great
herds of Oryx in Egypt have come before, and
it is possible by the Egyptians
East Africa from imported. This means
However, not all types of the Oryx
dammah (sabelgemsbok) of the
Egyptians bred because many
Other fossielsoorte of Oryx has a
large areas in Africa and Eurasia known
is.
Dr. Cindy Harper, on our behalf
research on gold Burchellse
roe said: "The Onderstepoort Veterinary
Genetic Laboratory of the
Faculty of Veterinary Science, University
Pretoria is currently working on a project
the mutation, which is responsible
for the golden color of the Burchellse
golden deer to identify. "The project
Dr. Harper is under control as
director of the laboratory.
Fred Burchell, the current owner of
Burchellse golden gazelles, a descendant
Dr. William John Burchell (1781 -
1863), which is so described: "He was at
far the most scientific and greatest or
early African explorers, and one of the
most learned and accomplished travelers
or any age or country. Today HIS
Discoveries are to be found in several
continents ... "Burchellse bontkwagga,
Cape Mountain Zebra, tsessebe, wild dog
blue wildebeest, Burchellse coucal
('s Coucal) and many other animal species are
first described by him.
Fred Burchell was about 12 years
ago after gemsbok in Namibia
watched and heard of "fox-roes"
the farmers for the foot
shot and killed because they feared
they would cross with their other gazelles.
(It happened anyway!) He
noted they were generally
bigger, longer and thicker horns
She was also in a better
physical condition than the other gazelles.
Particularly striking was that they
all identical appearance without mixed
grills like the golden wildebeest.
It all started buy-back and a
herd on his farm in Namibia established.
Today there are altogether about
280. I have a lot of time between them
spent and a bull and a cow for
research material shot (see photo).
What the scholars already on them
may find out, it remains a fact that they
according to the definition of a species
have similar physical and maatskaplikke
Properties showing fertile offspring
breeding and better suited than
our normal deer seem to be
survival under extreme temperatures
and food and water shortages.
It is perhaps only the ecological
principle (rule of Bergmann) that genuine
wilderness light in color. With
global warming is probably a
new species that are developing,
if not already, or at least a
subspecies is not!
No comments:
Post a Comment