On 08/05/2012 09:09 AM, Nick Keighley wrote:
> On Aug 5, 3:36 am, *Hemidactylus* <
ecpho...@hotmail.com> wrote:
>
>> If elephants had realized long ago what an eventual threat to them
>> humans would become, could they have outmatched us at a time early in
>> our natural history and acted to literally stomp us into oblivion, herd
>> versus tribe? Could they have developed strategies to hunt and destroy
>> us and used their infrasonic or seismic means of communication to
>> coordinate seek and destroy attacks on humans?
>
> I don't think elephants are smart enough to do any of this
Could they have a memory capacity comparable to ours given their large
hippocampi? Yet is this memory capacity bottlenecked in one individual
(the matriarch), thus making herd dynamics rest on the shoulders of her
accumulated knowledge base? Do elephants debate or make consensus
decisions or are they more autocratic?
Since the main purpose of this thread was to break the thundering herd
out of that other thread here is a copy and paste from my recent
followup to Perseus:
Where do humans rate versus elephants for memory?
http://news.softpedia.com/news/Why-Elephants-Have-Such-a-Long-Memory-77563.shtml
http://news.bbc.co.uk/2/hi/science/nature/1285532.stm
http://www.wired.com/wiredscience/2011/03/elephant-memory-leadership/
http://en.wikipedia.org/wiki/Elephant_cognition
[quote]Elephants also have a very large and highly convoluted
hippocampus, a brain structure in the limbic system that is much bigger
than that of any human, primate or cetacean.[15] The hippocampus of an
elephant takes up about 0.7% of the central structures of the brain,
comparable to 0.5% for humans and with 0.1% in Risso's dolphins and
0.05% in bottlenose dolphins.[16]
The hippocampus is linked to emotion through the processing of certain
types of memory, especially spatial. This is thought to be possibly why
elephants suffer from psychological flashbacks and the equivalent of
post-traumatic stress disorder (PTSD).[17][18][/quote]
www.allmanlab.caltech.edu/pdfs/hakeem2005.pdf
[quote]ABSTRACT
We acquired magnetic resonance images of the brain of an adult Afri-
can elephant, Loxodonta africana, in the axial and parasagittal planes
and produced anatomically labeled images. We quantified the volume of the
whole brain (3,886.7 cm3) and of the neocortical and cerebellar gray and
white matter. The white matter-to-gray matter ratio in the elephant neo-
cortex and cerebellum is in keeping with that expected for a brain of
this size. The ratio of neocortical gray matter volume to corpus
callosum cross-sectional area is similar in the elephant and human
brains (108 and 93.7,respectively), emphasizing the difference between
terrestrial mammals and cetaceans, which have a very small corpus
callosum relative to the volume of neocortical gray matter (ratio of
181–287 in our sample). Finally, the elephant has an unusually large and
convoluted hippocampus compared to primates and especially to cetaceans.
This may be related to the extremely long social and chemical memory of
elephants. [/quote]
www.stanford.edu/~nmpinter/elephant%20cognition%202008.pdf
[quote]The African elephant brain that was examined by magnetic
resonance imaging revealed that the hippocampus is unusually large and
convoluted and proportionately slightly larger in comparison to brain
size than in the human (Hakeem et al., 2005). This observation contrasts
with another report, however, based on dissection of African and Asian
elephant brains, indicating that the hippocampus is somewhat
dispropor-tionately smaller than in the human (Shoshani et al., 2006).
It seems possible that a comparison of brain structures by dissection
could be a little distorted compared with modern imaging techniques
applied to intact brains (Hakeem et al., 2005). Although more definitive
studies are needed, a larger and more complex hippocampus in the
elephant brain than would be predicted by brain size, would be
consistent with the viewpoint that the information processing of the
cerebral cortex in elephants is adaptively biased towards facilitating
long-term, spatial-temporal information acqui-sition and storage.[/quote]
And adding to this copy and paste this last article is critical of
elephant abilities so you might like it more. Enjoy.