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Elijah The Tishbite
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Sahara: Barrier or corridor? Nonmetric cranial traits and biological affinities of North African late holocene populations


Abstract


The Garamantes flourished in southwestern Libya, in the core of the Sahara Desert ∼3,000 years ago and largely controlled trans-Saharan trade. Their biological affinities to other North African populations, including the Egyptian, Algerian, Tunisian and Sudanese, roughly contemporary to them, are examined by means of cranial nonmetric traits using the Mean Measure of Divergence and Mahalanobis D2 distance. The aim is to shed light on the extent to which the Sahara Desert inhibited extensive population movements and gene flow. Our results show that the Garamantes possess distant affinities to their neighbors. This relationship may be due to the Central Sahara forming a barrier among groups, despite the archaeological evidence for extended networks of contact. The role of the Sahara as a barrier is further corroborated by the significant correlation between the Mahalanobis D2 distance and geographic distance between the Garamantes and the other populations under study. In contrast, no clear pattern was observed when all North African populations were examined, indicating that there was no uniform gene flow in the region. Am J Phys Anthropol, 2011. © 2011 Wiley Periodicals, Inc.

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-Just Call Me Jari-
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Nice Find Bass, do you have the full study or at least the conclusions..??
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Elijah The Tishbite
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edited
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-Just Call Me Jari-
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Thanks...LMAO. Another Nail in the Eurocentric coffin. This Proves the black Tauregs are Authentic Berbers not descendants of African Concubines...


You Reading this Garrig....

Nice Find!!

quote:
Originally posted by .Charlie Bass.:
Big up to Sundjata


http://www.sendspace.com/file/2x1ta9

They were closest to Soleb Nubians but the samples used are not good.


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BrandonP
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So I presume this is saying that the Garamantes were morphologically distinct from Mediterranean North Africans? If so, that would challenge the Eurocentric argument that they were "Mediterranean Caucasoids".

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zarahan aka Enrique Cardova
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Good work Bass.
Their conclusions are about what ES regulars would expect.
The Sahara by drying up, did slow down gene flow, though
it did not stop such gene flow entirely. In a number
of their charts, the Libyan area Garamantes cluster more closely
with the Soleb samples from Nubia, than the late
dynasty Egyptian or GReek/Roman samples in Alexandria,
(both in the far north of Egypt) or the coastal
Carthaginian, or Tunisian or Algerian samples.

These findings should be compared with writing on the
Garamantes. Professor Ivan Van Sertima, 1985, holds
that the Garamantes were primarily a black
African people of the Sahara. He contrasts them with "Libyans."
But if the Garamantes in the study above were based
primarily in Libya, then arent they too "Libyans?"
WHy are "Libyans" so often spoken of in terms of
"Tamahu" [sic] rather than Garamantes as well?

And if the Garamantes cluster with Nubians based in
the Sudan, how valid is the "racial" claim of so-called "white"
Garamantes allegedly hunting down "Ethiopians" in their chariots,
as claimed by assorted white writers? Could it be
that this claim was always bogus to begin with?

Likewise claims of "white" Saharan invaders in chariots,
in various periods, by various European writers.
But as Fentress in "The Berbers" 1997 shows, the
skeletons of the reputed "white" invaders turn
out to resemble those from southern Egypt, not Middle Easterners.

 -

QUOTE: the skeletons seem to show closer
resemblance to groups from the upper Nile Valley
than to contemporary material from the Maghreb."

--M. Fentress. The Berbers, 1997

-------------------------------------------------------------
That's that. Now does anyone have any detailed data
on the Garamantes?
Trade? Government? etc?

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Sundjata
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quote:
Originally posted by Truthcentric:
So I presume this is saying that the Garamantes were morphologically distinct from Mediterranean North Africans?

Not necessarily, which is why we should refrain from calling them "Mediterranean North Africans" (note that the Carthaginians and Algerians fit into the same cluster as the Soleb "Nubians").

"Overall, three clusters may be identified. These consist of (1) the Garamantes, (2) a group formed by the populations of Gizeh and Kerma, and (3) a group that includes Soleb, Alexandrians, Algerians, and Carthaginians. The above results have important implications for our understanding of population history and affinities in North Africa in the last 4,000 years."


^The study shows that Garamante men shared most similarity with Soleb Nubian samples while the females showed their greatest affinities with the Egyptian Alexandrian. All in all, it is argued that the Garamantes are pretty much outliners yet by and large their closet relationships are with groups from the Nile valley. Though as Bass points out, sample sizes are small.

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Clyde Winters
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This study is inconclusive.The authors used multiple test to make it appear the study is relevant--but it is not relevant at all.


The sample size varies from 8 to 88. To have any significance the sample size should have been a minimum of 15 individuals for each population sampled. If they could not find a population numbering at least 15 for each population sampled--that population should have been kept out of the study. By keeping the population at 15, the authors would have had a random sample which would have been more valid and reliable.

None of the values are statistically significant at .050. As a result, why should we consider them as telling us anything about population dynamics during the period under consideration.

In my opinion the authors of the study knew somebody on the editorial staff. It does not show Garamantes relating to any of the other populations.

And why should they? The Garamante trade routes extended into Dar Tichitt and other Western urban centers.

.

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zarahan aka Enrique Cardova
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They do say that the Garamantes were isolated- that
is one of the points in their conclusion, but at the
same time they show some relative clustering of the Garamantes
with Nubian populations from the Sudan, more so than
other populations, when the individual groups are broken out separately.
Their extensive trade routes would not limit their
relative clustering to the Sudanic group.

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Clyde Winters
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quote:
Originally posted by zarahan- aka Enrique Cardova:
They do say that the Garamantes were isolated- that
is one of the points in their conclusion, but at the
same time they show some relative clustering of the Garamantes
with Nubian populations from the Sudan, more so than
other populations, when the individual groups are broken out separately.
Their extensive trade routes would not limit their
relative clustering to the Sudanic group.

The paper appears to claim they are not related to the sudanese. Below are a couple of quotes from the study:


quote:


Table 6 shows that the greatest distance of the Garamantes
to their neighbors is that with Gizeh and Kerma,
both for males and females. These distances are also the
greatest among all populations under study and they are
statistically significant.





quote:


The three-dimensional plots of the MDS analyses
are shown in Figures 4 and 5. To gain a better understanding
of sample biodistances, these figures have been
drawn using the same scale for all axes since the range
of the MDS values from Dimension 1 to 3 follows
roughly the ratio 4.6: 2.5: 1.6. Figures 4 and 5 show that
among males and females the Garamantes are located at
the very positive extreme
of Dimension 1, Gizeh and
Kerma are at the opposite extreme,
while all other
groups are spread close to the center. With regard to
Dimensions 2 and 3, the Garamantes do not seem to differ
particularly from the other populations, being located
close to the middle of the comparative range of values.
Overall, however, the Garamantes stand out in multidimensional space, as do the samples from Kerma and Gizeh.

.


The paper appears to be standard eurocentric fair.

.

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BrandonP
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Sorry to burst people's bubble here, but I take nonmetric studies like this with many grains of salt.

The Relationship between Size and Expression of Nonmetric Traits on the Human Skull

quote:
It should be noted that research has shown nonmetric traits to be population specific and therefore only really useful for intrapopulation analyses (Cheverud & Buikstra, 1981; Kohn, 1991).
Let's also recall Hanihara et al reporting Nubians to be closer to Europeans than even Somalis. Frankly, if nonmetric traits are only useful for intrapopulation analyses, I don't think this is very useful.

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Doug M
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Actually I think this study reinforces for me at least the importance of the Sudan Nile Valley corridor along with the ancient Chadian branch of the Nile (now dried up) and its Mega Lakes. There has always been a transit corridor for Africans crossing the Sahara/Sahel to points North and West from Sudan and the Nile Valley. And this is just another example of the evidence for it.
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Explorador
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Putting the complete reliance on non-metric traits aside, the study relies heavily on facial traits.

It has been determined that the facial skeleton is generally more plastic and easily manipulated by external/environmental pressures than the neurocranium, which is more phologenetically discriminatory in assigning relationship between test populations.

The Sahara has not historically barred interaction between coastal north and those more inwardly situated in the past or the present. Where do sub-Saharan west Africans [non-air travelers] migrant workers generally go first, before finding their way into Europe? the Maghreb, of course. Distance may be more of a factor in determining extent of interaction between geographically distant groups than merely conditions of the Sahara, outside of any cultural practices that might restrict genetic exchange between two populations or groups.

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Swenet
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quote:
Originally posted by Truthcentric:
Sorry to burst people's bubble here, but I take nonmetric studies like this with many grains of salt.

The Relationship between Size and Expression of Nonmetric Traits on the Human Skull

quote:
It should be noted that research has shown nonmetric traits to be population specific and therefore only really useful for intrapopulation analyses (Cheverud & Buikstra, 1981; Kohn, 1991).
Let's also recall Hanihara et al reporting Nubians to be closer to Europeans than even Somalis. Frankly, if nonmetric traits are only useful for intrapopulation analyses, I don't think this is very useful.
Agree with what you’re saying. Keita and others have already issued rarely heeded caveats about non-metric analysis. These ''geneflow tunnelvisioned’’ authors (who remind me of Godde) don’t know how incredibly stupid they sound when they talk about Egypto-Nubian closeness in terms of geneflow.

This paper offers little to what is already known about the Garamantes and North Africans in general. Those skeletal remains would’ve been better off in the hands of more creative scholars such as Dr.Zakrzweski.

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zarahan aka Enrique Cardova
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It should be noted that research has shown nonmetric traits to be population specific and
therefore only really useful for intrapopulation analyses (Cheverud & Buikstra, 1981; Kohn, 1991).


^^Good point.


Let's also recall Hanihara et al reporting Nubians to be closer to Europeans than even Somalis.
Frankly, if nonmetric traits are only useful for intrapopulation analyses.


Non-metric studies may indeed have the weakness you mention, but
I can't recall any such Hanihara study. Hanihara
2003 clustered the Somalis with Kenyans and other
peoples of East Africa, rather than Europeans or
"Middle Easterners." In his facial flatness study
2000, Somalis group with other Africans. Maybe
you have another of his studies in mind. Which one?

 -

 -

PS: Swenet- can you link to where Keita warns about
non-metric studies?
Its good to know what he said, when these questions come up.

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Swenet
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Hanihara et al's '03 PCO plots did place Egyptians and Nubians closer to Europeans than to Somali's (just like Ricaut et al's plots do in their 08 paper), but the inter populational distance values both papers used were not disclosed, so it remains an open question.

Can’t recall where I read Keita’s caveat right now, but in his 93 paper he sheds light on some of the odd results non-metric analysis typically yield (eg, Ashanti’s close to Indians and indistinguishable from Burmese people).

http://wysinger.homestead.com/keita-1993.pdf
(p138)

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zarahan aka Enrique Cardova
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Point taken on the non-metric studies and it is good
that you mention those caveats, along with Truthcen.
I will have to find Hanihara's study as Godde
shows him having a mixed sampling batch. One for
example was 12th Dynasty era Nubians, and not
contemporaneous or near with Naqada period
samples, against whom they were being compared.
Godde also claims the batch was also loaded with more recent,
Christian period samples, and finally a recent sample from Sesebi. quote from Godde:

The Hanihara samples have been dated to specific time periods,
but exact site dates are not available. The first
sample from the Hanihara data was from the site
and time period of the same name, Kerma. Adams
(1977, p. 16) dates the Kerma time period from
1991 to 1650 BC. The second group, from the
islands of Hesa and Biga (Hesa/Biga) located near
Aswan, dates to the Christian time period.
Nielsen (1970) notes the dates for the Christian
time period as 550–1500 AD. Hanihara et al.
(1998) refers to the final group as a ‘‘recent
population’’ from Sesebi.


Don't have the actual Hanihara study on hand to verify.
THis doesn't negate the warning about non-metric
studies and their methodologies/assumptions, but
alongside the those weaknesses stand the sampling issues.
Ricaut apparently takes his sampling of Nubians
from Hanihara's 2003 study.

Will check out Keita link.

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Swenet
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http://wysinger.homestead.com/discrete_cranial.pdf

^Hanihara et al '03
I'm sure you've already read it though, so there is nothing really new to reap here.

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zarahan aka Enrique Cardova
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Yeah true enough. Of note is how Somalians cluster
with other "sub-Saharans" but that is nothing new too.
Just recapped for first time readers.

 -

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Tukuler
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 -
 -


 -

quote:
Originally posted by Swenet:

Hanihara et al's '03 PCO plots did place Egyptians and Nubians closer to Europeans than to Somali's (just like Ricaut et al's plots do in their 08 paper), but the inter populational distance values both papers used were not disclosed, so it remains an open question.

. . . .

http://wysinger.homestead.com/discrete_cranial.pdf

^Hanihara et al '03



quote:
Originally posted by zarahan- aka Enrique Cardova:

Godde
shows [Hanihara] having a mixed sampling batch. One for
example was 12th Dynasty era Nubians, and not
contemporaneous or near with Naqada period
samples, against whom they were being compared.
Godde also claims the batch was also loaded with more recent,
Christian period samples, and finally a recent sample from Sesebi.

. . . .

THis doesn't negate the warning about non-metric
studies and their methodologies/assumptions, but
alongside the those weaknesses stand the sampling
issues. Ricaut apparently takes his sampling of Nubians
from Hanihara's 2003 study.


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africurious
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I'm glad other posters on this board pointed out the glaring faults of this study. Too many of us get happy when we read a study with a conclusion that jives with what we already believe or suspect with little regard for the methods of the study. Eurocentrics, especially the nuts, do it frequently and we shouldn't. The methodology used to arrive at the conclusion is just as important as the conclusion itself, at least, if you're seeking truth and not feel-goodism.
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zarahan aka Enrique Cardova
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Yes, all should at least be aware that the Nubians
used are a pooled sample that incorporates Christian era/Arab
advent era Nubia, (a time of some foreign gene flow),
not a straight up "classic" Dynastic period Nubian sampling.
We really don't have an apples to apples comparison of
Dynastic era Nubians to Egyptians or other Africans
in Hanihara 2003.

However we do have a straight up "classic" comparison
in Godde 2009, which has some weaknesses as other
ES vets have shown, but overall, affirms what other
scholars have long shown about Nubians and Egyptians-
that they are ethnically the closest people in the Nile Valley.
Yurco said this way back in 1989, and others before him.

 -

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zarahan aka Enrique Cardova
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The plot thinckens somewhat. Hanihara 1998, shows
Christian era Nubians clustering with Egyptians,
based on zygomatic bone traits. So his 2003 pooled
"Nubian" match is offset with the Nubian cluster in
the 1998 study. Based on Hanihara's 1998 study, the
Nubians cluster with Egyptians and are more similar
overall to Sub-Saharan Africans. Hanihara's work
yields different results depending on sampling,
not surprising, but there is also so much diversity
in tropical African populations that it easily could
account for variations and diversity in samples gathered.

 -

QUOTE:
"Bipartition of the zygomatic bone is less frequent in
the European region than in the eastern part of the
Old World. Few temporal changes are evident among
5 series of the samples from the United Kingdom. The
westward and eastward shift of the occurrence of the
European bipartite zygomatic bone can be detected.
In the North African area, the late Dynastic samples
of Egypt and Nubia show the highest frequency
among the samples from this region.. No samples from
recent North Africa have the bipartite zygomatic
bone. Some of the Subsaharan African population
samples show a bipartite zygomatic bone... The
SubSaharan African samples have relatively higher
frequency of the trait.."

-- Hanihara et al 1998. Os zygomaticum bipartitum:
frequency distribution in major human populations.
J. Anat. (1998), 192, pp. 539±555

--------------------
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Swenet
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Hanihara's Nubian sample may very well be the same as Holidays (partly) foreign ''somewhat cold adapted'' Nubian sample he has used several times. Unfortunately, this cannot be confirmed, because Holiday doesn't properly label his samples.
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