Langdon tries it again

[Marc Verha]

Has an aquatic diet been necessary for hominin brain evolution
and functional development? John H Langdon 2006
Brit.J.Nutr.96:7-17

A number of authors have argued that only an aquatic-based
diet can provide the necessary quantity of DHA to support the
human brain, and that a switch to such a diet early in hominin
evolution was critical to human brain evolution. This paper
identifies the premises behind this hypothesis and critiques
them on the basis of clinical literature. Both tissue levels
and certain functions of the developing infant brain are
sensitive to extreme variations in the supply of DHA in
artificial feeding, and it can be shown that levels in human
milk reflect maternal diet. However, both the maternal and
infant bodies have mechanisms to store and buffer the supply
of DHA, so that functional deficits are generally resolved
without compensatory diets. There is no evidence that human
diets based on terrestrial food chains with traditional
nursing practices fail to provide adequate levels of DHA or
other n-3 fatty acids. Consequently, the hypothesis that DHA
has been a limiting resource in human brain evolution must be
considered to be unsupported.

[Rick Wagle]

"Marc Verhaegen" <fa204466@skynet.be> wrote in message
news:44be4553$0$10456$ba620e4c@news.skynet.be...
> Has an aquatic diet been necessary for hominin brain
> evolution and functional development? John H Langdon 2006
> Brit.J.Nutr.96:7-17
>
> A number of authors have argued that only an aquatic-based
> diet can provide the necessary quantity of DHA to support
> the human brain, and that a switch to such a diet early in
> hominin evolution was critical to human brain evolution.
> This paper identifies the premises behind this hypothesis
> and critiques them on the basis of clinical literature. Both
> tissue levels and certain functions of the developing infant
> brain are sensitive to extreme variations in the supply of
> DHA in artificial feeding, and it can be shown that levels
> in human milk reflect maternal diet. However, both the
> maternal and infant bodies have mechanisms to store and
> buffer the supply of DHA, so that functional deficits are
> generally resolved without compensatory diets. There is no
> evidence that human diets based on terrestrial food chains
> with traditional nursing practices fail to provide adequate
> levels of DHA or other n-3 fatty acids. Consequently, the
> hypothesis that DHA has been a limiting resource in human
> brain evolution must be considered to be unsupported.
>
Nice to see you publicizing the agents of your own
destruction. Very big of you. We await with bated breath your
usual splenetic logic-free, fact-shy response.

Rick Wagler

[Spiznet]

Alas, this is sad, a scientific paper disproving part of AAT.

Marc Verhaegen wrote:
> Has an aquatic diet been necessary for hominin brain
> evolution and functional development? John H Langdon 2006
> Brit.J.Nutr.96:7-17
>
> A number of authors have argued that only an aquatic-based
> diet can provide the necessary quantity of DHA to support
> the human brain, and that a switch to such a diet early in
> hominin evolution was critical to human brain evolution.
> This paper identifies the premises behind this hypothesis
> and critiques them on the basis of clinical literature. Both
> tissue levels and certain functions of the developing infant
> brain are sensitive to extreme variations in the supply of
> DHA in artificial feeding, and it can be shown that levels
> in human milk reflect maternal diet. However, both the
> maternal and infant bodies have mechanisms to store and
> buffer the supply of DHA, so that functional deficits are
> generally resolved without compensatory diets. There is no
> evidence that human diets based on terrestrial food chains
> with traditional nursing practices fail to provide adequate
> levels of DHA or other n-3 fatty acids. Consequently, the
> hypothesis that DHA has been a limiting resource in human
> brain evolution must be considered to be unsupported.

[Marc Verha]

"Rick Wagler" <taxidea3@shaw.ca> wrote in message
news:imvvg.211189$Mn5.4042@pd7tw3no...
>
> "Marc Verhaegen" <fa204466@skynet.be> wrote in message
> news:44be4553$0$10456$ba620e4c@news.skynet.be...
> > Has an aquatic diet been necessary for hominin brain
> > evolution and functional development? John H Langdon 2006
> > Brit.J.Nutr.96:7-17
> >
> > A number of authors have argued that only an aquatic-based
> > diet can provide the necessary quantity of DHA to support
> > the human brain, and that a switch to such a diet early in
> > hominin evolution was critical to human brain evolution.
> > This paper identifies the premises behind this hypothesis
> > and critiques them on the basis of clinical literature.
> > Both tissue levels
and
> > certain functions of the developing infant brain are
> > sensitive to
extreme
> > variations in the supply of DHA in artificial feeding, and
> > it can be
shown
> > that levels in human milk reflect maternal diet. However,
> > both the maternal and infant bodies have mechanisms to
> > store and buffer the supply of DHA, so that functional
> > deficits are generally resolved without compensatory
> > diets. There is no evidence that human diets based on
> > terrestrial food chains with traditional nursing practices
> > fail to provide adequate levels of DHA or other n-3 fatty
> > acids. Consequently, the hypothesis that DHA has been a
> > limiting resource in human brain evolution must be
> > considered to be unsupported.

> Nice to see you publicizing the agents of your own
> destruction. Very big of you. We await with bated breath
> your usual splenetic logic-free, fact-shy response.

My dear boy, I haven't read the paper yet, but I have no doubt
it's about as sensible as John's previous one.

http://allserv.rug.ac.be/~mvaneech/outthere.htm

[Rick Wagle]

"Marc Verhaegen" <fa204466@skynet.be> wrote in message
news:44becaff$0$5517$ba620e4c@news.skynet.be...
>
> "Rick Wagler" <taxidea3@shaw.ca> wrote in message
> news:imvvg.211189$Mn5.4042@pd7tw3no...
>>
>> "Marc Verhaegen" <fa204466@skynet.be> wrote in message
>> news:44be4553$0$10456$ba620e4c@news.skynet.be...
>> > Has an aquatic diet been necessary for hominin brain
>> > evolution and functional development? John H Langdon 2006
>> > Brit.J.Nutr.96:7-17
>> >
>> > A number of authors have argued that only an
>> > aquatic-based diet can provide the necessary quantity of
>> > DHA to support the human brain, and that a switch to such
>> > a diet early in hominin evolution was critical to human
>> > brain evolution. This paper identifies the premises
>> > behind this hypothesis and critiques them on the basis of
>> > clinical literature. Both tissue levels
> and
>> > certain functions of the developing infant brain are
>> > sensitive to
> extreme
>> > variations in the supply of DHA in artificial feeding,
>> > and it can be
> shown
>> > that levels in human milk reflect maternal diet. However,
>> > both the maternal and infant bodies have mechanisms to
>> > store and buffer the supply of DHA, so that functional
>> > deficits are generally resolved without compensatory
>> > diets. There is no evidence that human diets based on
>> > terrestrial food chains with traditional nursing
>> > practices fail to provide adequate levels of DHA or other
>> > n-3 fatty acids. Consequently, the hypothesis that DHA
>> > has been a limiting resource in human brain evolution
>> > must be considered to be unsupported.
>
>> Nice to see you publicizing the agents of your own
>> destruction. Very big of you. We await with bated breath
>> your usual splenetic logic-free, fact-shy response.
>
> My dear boy, I haven't read the paper yet, but I have no
> doubt it's about as sensible as John's previous one.
>
In which case you're doomed. Enjoy.

Rick Wagler

[Marc Verha]

"Rick Wagler" <taxidea3@shaw.ca> wrote in message
news:FSDvg.212934$Mn5.144929@pd7tw3no...

> >> > Has an aquatic diet been necessary for hominin brain
> >> > evolution and functional development? John H Langdon
> >> > 2006 Brit.J.Nutr.96:7-17 A number of authors have
> >> > argued that only an aquatic-based diet can provide the
> >> > necessary quantity of DHA to support the human brain,
> >> > and that a switch to such a diet early in hominin
> >> > evolution was critical to human brain evolution. This
> >> > paper identifies the premises behind this hypothesis
> >> > and critiques them on the basis of clinical literature.
> >> > Both tissue
levels
> > and
> >> > certain functions of the developing infant brain are
> >> > sensitive to
> > extreme
> >> > variations in the supply of DHA in artificial feeding,
> >> > and it can be
> > shown
> >> > that levels in human milk reflect maternal diet.
> >> > However, both the maternal and infant bodies have
> >> > mechanisms to store and buffer the supply of DHA, so
> >> > that functional deficits are generally resolved without
> >> > compensatory diets. There is no evidence that human
> >> > diets based on terrestrial food
chains
> >> > with traditional nursing practices fail to provide
> >> > adequate levels of DHA
or
> >> > other n-3 fatty acids. Consequently, the hypothesis
> >> > that DHA has been
a
> >> > limiting resource in human brain evolution must be
> >> > considered to be unsupported.

> >> Nice to see you publicizing the agents of your own
> >> destruction. Very big of you. We await with bated breath
> >> your usual splenetic logic-free, fact-shy response.

> > My dear boy, I haven't read the paper yet, but I have no
> > doubt it's
about
> > as sensible as John's previous one.

> In which case you're doomed.

You're delusional, my boy: you're like a geologist who refuses
to consider plate tectonics... :-D First please try to tell us
why you are so fanatically convinced that early Homo did not
disperse along the coasts IYO. You can't. FYI (apparently
you're still uninformed), this is what AAT is about: Homo
littoral diaspora: The term "Aquatic Ape Theory" is not very
accurate: it's not about apes, nor about having been aquatic.
AAT states that our ancestors sometime after the Homo/Pan
split relied partly on aquatic resources:
- Homo: AAT, contrary to what many PAs think (I guess
including Travsky), has nothing to do with australopiths,
- littoral: it's about our ancestors having been shoreline
dwellers (coast/lake/river-side),
- diaspora: Homo remains 1.8 Ma are found in places as far as
Ain Hanech (Algeria), Dmanisi (Georgia), Mojokerto (Java)
etc.: AAT simply says that these people got there along
shorelines, not over dry plains as he old PAs used to
believe. Leading PAs such as Ph.Tobias
http://allserv.rug.ac.be/~mvaneech/outthere.htm &
Chr.Stringer now agree with a water-rich past & shoreline
dispersals http://groups.yahoo.com/group/AAT

You can find John Langdon's paper at the AAT1 files
http://groups.yahoo.com/group/AAT1 Enjoy!

--Marc Verhaegen
http://allserv.rug.ac.be/~mvaneech/Symposium.html

http://users.ugent.be/~mvaneech/Fil/Verhaegen_Human_Evol-
ution.html

[Rich Travs]

spiznet wrote:
>
> Alas, this is sad, a scientific paper disproving part of
> AAT.

How true. There are many populations on the planet today where
fish does not play much of a role in diet and they develop
quite well.

> Marc Verhaegen wrote:
> > Has an aquatic diet been necessary for hominin brain
> > evolution and functional development? John H Langdon 2006
> > Brit.J.Nutr.96:7-17
> >
> > A number of authors have argued that only an aquatic-based
> > diet can provide the necessary quantity of DHA to support
> > the human brain, and that a switch to such a diet early in
> > hominin evolution was critical to human brain evolution.
> > This paper identifies the premises behind this hypothesis
> > and critiques them on the basis of clinical literature.
> > Both tissue levels and certain functions of the developing
> > infant brain are sensitive to extreme variations in the
> > supply of DHA in artificial feeding, and it can be shown
> > that levels in human milk reflect maternal diet. However,
> > both the maternal and infant bodies have mechanisms to
> > store and buffer the supply of DHA, so that functional
> > deficits are generally resolved without compensatory
> > diets. There is no evidence that human diets based on
> > terrestrial food chains with traditional nursing practices
> > fail to provide adequate levels of DHA or other n-3 fatty
> > acids. Consequently, the hypothesis that DHA has been a
> > limiting resource in human brain evolution must be
> > considered to be unsupported.

[Marc Verha]

"Rich Travsky" <traRvEsky@hotmMOVEail.com> wrote in message
news:44C3DEDA.D509859B@hotmMOVEail.com...
> spiznet wrote:

> > Alas, this is sad, a scientific paper disproving part
> > of AAT.

> How true. There are many populations on the planet today
> where fish does not play much of a role in diet and they
> develop quite well.

Not impossible, but you forget (or never knew - I forgot
you're so poorly informed):
- that AAT is not about fish, but about shoreline foods
(shellfish, coconuts, crayfish, trurtle, bird eggs etc.),
- that there exists trade between coastal & inland
populations,
- that there are rivers & lakes inland, in which fish swim &
other water creatures live,
- that H.sapiens develops slower than his forebears (IOW,
needs more time to develop his brain),
- that neandertals had somewhat larger brains than we,
- that cretins live in the mountains
- etc.

:-)

FYI, Trasvky: AAT = Homo littoral diaspora. Aquatic Ape Theory
is an inaccurate term: it's not about apes, nor about having
been aquatic. AAT states that our ancestors sometime after the
Homo/Pan split relied partly on aquatic resources:
- Homo: AAT, contrary to what many PAs think, has nothing to
do with australopiths,
- littoral: it's about our ancestors having been shoreline
dwellers (coast/lake/river-side),
- diaspora: Homo remains 1.8 Ma are found in places as far as
Ain Hanech (Algeria), Dmanisi (Georgia), Mojokerto (Java)
etc. AAT simply says that these people got there along
shorelines, not over dry plains as some obsolete
"scientists" like you still believe.

http://allserv.rug.ac.be/~mvaneech/outthere.htm
http://groups.yahoo.com/group/AAT
________

> > Marc Verhaegen wrote:
> > > Has an aquatic diet been necessary for hominin brain
> > > evolution and functional development? John H Langdon
> > > 2006 Brit.J.Nutr.96:7-17
> > >
> > > A number of authors have argued that only an
> > > aquatic-based diet can
provide
> > > the necessary quantity of DHA to support the human
> > > brain, and that a
switch
> > > to such a diet early in hominin evolution was critical
> > > to human brain evolution. This paper identifies the
> > > premises behind this hypothesis
and
> > > critiques them on the basis of clinical literature. Both
> > > tissue levels
and
> > > certain functions of the developing infant brain are
> > > sensitive to
extreme
> > > variations in the supply of DHA in artificial feeding,
> > > and it can be
shown
> > > that levels in human milk reflect maternal diet.
> > > However, both the
maternal
> > > and infant bodies have mechanisms to store and buffer
> > > the supply of
DHA, so
> > > that functional deficits are generally resolved without
> > > compensatory
diets.
> > > There is no evidence that human diets based on
> > > terrestrial food chains
with
> > > traditional nursing practices fail to provide adequate
> > > levels of DHA
or
> > > other n-3 fatty acids. Consequently, the hypothesis that
> > > DHA has been
a
> > > limiting resource in human brain evolution must be
> > > considered to be unsupported.

[Rich Travs]

Marc Verhaegen wrote:
>
> "Rich Travsky" <traRvEsky@hotmMOVEail.com> wrote in message
> news:44C3DEDA.D509859B@hotmMOVEail.com...
> > spiznet wrote:
>
> > > Alas, this is sad, a scientific paper disproving part of
> > > AAT.
>
> > How true. There are many populations on the planet today
> > where fish does not play much of a role in diet and they
> > develop quite well.
>
> Not impossible, but you forget (or never knew - I forgot
> you're so poorly

Of course it's not impossible, and it renders moot any
argument that it's a requirement.

> informed):
> - that AAT is not about fish, but about shoreline foods
> (shellfish, coconuts, crayfish, trurtle, bird eggs etc.),
> - that there exists trade between coastal & inland
> populations,
> - that there are rivers & lakes inland, in which fish swim &
> other water creatures live,
> - that H.sapiens develops slower than his forebears (IOW,
> needs more time to develop his brain),
> - that neandertals had somewhat larger brains than we,
> - that cretins live in the mountains
> - etc.
>
> :-)
>
> FYI, Trasvky: AAT = Homo littoral diaspora. Aquatic Ape
> Theory is an inaccurate term: it's not about apes, nor about
> having been aquatic. AAT states that our ancestors sometime
> after the Homo/Pan split relied partly on aquatic resources:
> - Homo: AAT, contrary to what many PAs think, has nothing to
> do with australopiths,
> - littoral: it's about our ancestors having been shoreline
> dwellers (coast/lake/river-side),
> - diaspora: Homo remains 1.8 Ma are found in places as far
> as Ain Hanech (Algeria), Dmanisi (Georgia), Mojokerto
> (Java) etc. AAT simply says that these people got there
> along shorelines, not over dry plains as some obsolete
> "scientists" like you still believe.
>
> http://allserv.rug.ac.be/~mvaneech/outthere.htm
> http://groups.yahoo.com/group/AAT
> ________
>
> > > Marc Verhaegen wrote:
> > > > Has an aquatic diet been necessary for hominin brain
> > > > evolution and functional development? John H Langdon
> > > > 2006 Brit.J.Nutr.96:7-17
> > > >
> > > > A number of authors have argued that only an
> > > > aquatic-based diet can
> provide
> > > > the necessary quantity of DHA to support the human
> > > > brain, and that a
> switch
> > > > to such a diet early in hominin evolution was critical
> > > > to human brain evolution. This paper identifies the
> > > > premises behind this hypothesis
> and
> > > > critiques them on the basis of clinical literature.
> > > > Both tissue levels
> and
> > > > certain functions of the developing infant brain are
> > > > sensitive to
> extreme
> > > > variations in the supply of DHA in artificial feeding,
> > > > and it can be
> shown
> > > > that levels in human milk reflect maternal diet.
> > > > However, both the
> maternal
> > > > and infant bodies have mechanisms to store and buffer
> > > > the supply of
> DHA, so
> > > > that functional deficits are generally resolved
> > > > without compensatory
> diets.
> > > > There is no evidence that human diets based on
> > > > terrestrial food chains
> with
> > > > traditional nursing practices fail to provide adequate
> > > > levels of DHA
> or
> > > > other n-3 fatty acids. Consequently, the hypothesis
> > > > that DHA has been
> a
> > > > limiting resource in human brain evolution must be
> > > > considered to be unsupported.

[Marc Verha]

"Rich Travsky" <traRvEsky@hotmMOVEail.com> wrote in message
news:44DD69FC.79BD3FF7@hotmMOVEail.com...
> Marc Verhaegen wrote:
> > "Rich Travsky" <traRvEsky@hotmMOVEail.com> wrote in
> > message news:44C3DEDA.D509859B@hotmMOVEail.com...
> > > spiznet wrote:
> > > > Alas, this is sad, a scientific paper disproving part
> > > > of AAT.

> > > How true. There are many populations on the planet today
> > > where fish does not play much of a role in diet and they
> > > develop quite well.

> > Not impossible, but you forget (or never knew - I forgot
> > you're so
poorly

> Of course it's not impossible, and it renders moot any
> argument that it's a requirement.

No, my boy (why do savanna believers always "forget" most of
the evidence??):

> > informed):
> > - that AAT is not about fish, but about shoreline foods
> > (shellfish, coconuts, crayfish, trurtle, bird eggs
> > etc.),
> > - that there exists trade between coastal & inland
> > populations,
> > - that there are rivers & lakes inland, in which fish swim
> > & other water creatures live,
> > - that H.sapiens develops slower than his forebears (IOW,
> > needs more
time to
> > develop his brain),
> > - that neandertals had somewhat larger brains than we,
> > - that cretins live in the mountains
> > - etc.
> > :-)
> > FYI, Trasvky: AAT = Homo littoral diaspora. Aquatic Ape
> > Theory is an inaccurate term: it's not about apes, nor
> > about having been aquatic. AAT states that our ancestors
> > sometime after the Homo/Pan split relied partly on aquatic
> > resources:
> > - Homo: AAT, contrary to what many PAs think, has nothing
> > to do with australopiths,
> > - littoral: it's about our ancestors having been shoreline
> > dwellers (coast/lake/river-side),
> > - diaspora: Homo remains 1.8 Ma are found in places as far
> > as Ain Hanech (Algeria), Dmanisi (Georgia), Mojokerto
> > (Java) etc. AAT simply says that these people got there
> > along shorelines, not over
dry
> > plains as some obsolete "scientists" like you still
> > believe.
> >
> > http://allserv.rug.ac.be/~mvaneech/outthere.htm
> > http://groups.yahoo.com/group/AAT
> > ________
> >
> > > > Marc Verhaegen wrote:
> > > > > Has an aquatic diet been necessary for hominin brain
> > > > > evolution and functional development? John H Langdon
> > > > > 2006 Brit.J.Nutr.96:7-17
> > > > >
> > > > > A number of authors have argued that only an
> > > > > aquatic-based diet
can
> > provide
> > > > > the necessary quantity of DHA to support the human
> > > > > brain, and that
a
> > switch
> > > > > to such a diet early in hominin evolution was
> > > > > critical to human
brain
> > > > > evolution. This paper identifies the premises behind
> > > > > this
hypothesis
> > and
> > > > > critiques them on the basis of clinical literature.
> > > > > Both tissue
levels
> > and
> > > > > certain functions of the developing infant brain are
> > > > > sensitive to
> > extreme
> > > > > variations in the supply of DHA in artificial
> > > > > feeding, and it can
be
> > shown
> > > > > that levels in human milk reflect maternal diet.
> > > > > However, both the
> > maternal
> > > > > and infant bodies have mechanisms to store and
> > > > > buffer the supply
of
> > DHA, so
> > > > > that functional deficits are generally resolved
> > > > > without
compensatory
> > diets.
> > > > > There is no evidence that human diets based on
> > > > > terrestrial food
chains
> > with
> > > > > traditional nursing practices fail to provide
> > > > > adequate levels of
DHA
> > or
> > > > > other n-3 fatty acids. Consequently, the hypothesis
> > > > > that DHA has
been
> > a
> > > > > limiting resource in human brain evolution must be
> > > > > considered to
be
> > > > > unsupported.