next message in archive
no next message in thread
previous message in archive
previous message in thread
Index of Subjects
>>> Details are in photo captions
--e89a8f5027c6b07e8204e4422b9b
Content-Type: text/plain; charset=ISO-8859-1
http://en.wikipedia.org/wiki/Natural_selection
On Sun, Aug 18, 2013 at 11:32 AM, David & Alison Webster <dwebster@glinx.com
> wrote:
> **
> Hi Rick & All, Aug 18, 2013
> More precisely, natural selection is the selective tendency for
> non-survival of detrimental traits. It does not fit on a bumper sticker or
> in a 10 second sound bite nearly as well as 'survival of the fittest' but
> it is closer to the truth I think and helps account for much diversity. For
> example Viola cucullata has clubbed hairs on the lateral petals and V.
> septentrionalis has non-clubbed hairs and both are widely distributed. Both
> clubbed and non-clubbed have persisted because neither are detrimental.
> Yt, Dave Webster, Kentville
>
> ----- Original Message -----
> *From:* Rick Whitman <dendroica.caerulescens@gmail.com>
> *To:* naturens <naturens@chebucto.ns.ca>
> *Sent:* Saturday, August 17, 2013 7:30 PM
> *Subject:* Re: [NatureNS] caterpillar question- tuft control?
>
> I feel that you are under-estimating the power of natural selection i.e.
> if it benefits the organism, in terms of survival, it just might happen.
> I'm confident they are nothing more than highly evolved "hairs", that can
> be moved in a defensive manner.
> Best, Rick.
>
>
> On Sat, Aug 17, 2013 at 6:41 PM, nancy dowd <nancypdowd@gmail.com> wrote:
>
>> A week ago I took a picture of this fast-moving and impressive, albeit
>> common, White-Marked Tussock Moth Caterpillar (Orgyia leucostigma).
>> Pls correct the ID if wrong:
>> http://www.flickr.com/photos/92981528@N08/9501075283/
>>
>> Then it reared its head up at me and waved its front tufts in the air.
>> Closeup of front end here:
>> http://www.flickr.com/photos/92981528@N08/9503879386/
>> Details are in photo captions.
>>
>> I thought caterpillar tufts and hairs were passive structures, moving
>> only as the body moves. But they must have muscle control to wave
>> independently of one another like that. Are they a modified antennae
>> or leg or? Can't find anything out searching the internet or in the
>> books I have so I will try here.
>>
>> Nancy
>>
>
>
>
> --
> Rick Whitman
>
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2013.0.3392 / Virus Database: 3211/6585 - Release Date: 08/17/13
>
>
--
Rick Whitman
--e89a8f5027c6b07e8204e4422b9b
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr"><a href=3D"http://en.wikipedia.org/wiki/Natural_selection"=
target=3D"_blank">http://en.wikipedia.org/wiki/Natural_selection</a><br><d=
iv class=3D"gmail_extra"><br><br><div class=3D"gmail_quote">On Sun, Aug 18,=
2013 at 11:32 AM, David & Alison Webster <span dir=3D"ltr"><<a href=
=3D"mailto:dwebster@glinx.com" target=3D"_blank">dwebster@glinx.com</a>>=
</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><u></u>
<div bgcolor=3D"#ffffff">
<div>Hi Rick & All,=A0=A0=A0 =A0=A0=A0 =A0=A0=A0=20
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 Aug=20
18, 2013</div>
<div>=A0=A0=A0 More precisely, natural selection is the selective=20
tendency for non-survival of detrimental traits. It does not fit on a bumpe=
r=20
sticker or in a 10 second sound bite nearly as well as 'survival of the=
fittest'=20
but it is closer to the truth I think and helps account for much diversity.=
For=20
example Viola cucullata=A0has clubbed hairs on the lateral petals and V.=20
septentrionalis has non-clubbed hairs and both are widely distributed.=A0Bo=
th=20
clubbed and non-clubbed have persisted because neither are=20
detrimental.=A0</div>
<div>Yt, Dave Webster, Kentville</div>
<blockquote style=3D"BORDER-LEFT:#000000 2px solid;PADDING-LEFT:5px;PADDING=
-RIGHT:0px;MARGIN-LEFT:5px;MARGIN-RIGHT:0px" dir=3D"ltr">
<div style=3D"FONT:10pt arial">----- Original Message ----- </div>
<div style=3D"FONT:10pt arial;BACKGROUND:#e4e4e4"><b>From:</b>=20
<a title=3D"dendroica.caerulescens@gmail.com" href=3D"mailto:dendroica.ca=
erulescens@gmail.com" target=3D"_blank">Rick Whitman</a> </div>
<div style=3D"FONT:10pt arial"><b>To:</b> <a title=3D"naturens@chebucto.n=
s.ca" href=3D"mailto:naturens@chebucto.ns.ca" target=3D"_blank">naturens</a=
> </div>
<div style=3D"FONT:10pt arial"><b>Sent:</b> Saturday, August 17, 2013 7:3=
0=20
PM</div>
<div style=3D"FONT:10pt arial"><b>Subject:</b> Re: [NatureNS] caterpillar=
=20
question- tuft control?</div>
<div><br></div>
<div dir=3D"ltr">I feel that you are under-estimating the power of natura=
l=20
selection i.e. if it benefits the organism, in terms of survival, it just=
=20
might happen. I'm confident they are nothing more than highly evolved=
"hairs",=20
that can be moved in a defensive manner.
<div>Best, Rick.</div></div>
<div class=3D"gmail_extra"><br><br>
<div class=3D"gmail_quote">On Sat, Aug 17, 2013 at 6:41 PM, nancy dowd <s=
pan dir=3D"ltr"><<a href=3D"mailto:nancypdowd@gmail.com" target=3D"_blan=
k">nancypdowd@gmail.com</a>></span> wrote:<br>
<blockquote style=3D"BORDER-LEFT:#ccc 1px solid;MARGIN:0px 0px 0px 0.8ex;=
PADDING-LEFT:1ex" class=3D"gmail_quote">A week ago I took a picture of this=
fast-moving and=20
impressive, albeit<br>common, White-Marked Tussock Moth Caterpillar (Or=
gyia=20
leucostigma).<br>Pls correct the ID if wrong:<br><a href=3D"http://www.=
flickr.com/photos/92981528@N08/9501075283/" target=3D"_blank">http://www.fl=
ickr.com/photos/92981528@N08/9501075283/</a><br><br>Then=20
it reared its head up at me and waved its front tufts in the air.<br>Cl=
oseup=20
of front end here:<br><a href=3D"http://www.flickr.com/photos/92981528@=
N08/9503879386/" target=3D"_blank">http://www.flickr.com/photos/92981528@N0=
8/9503879386/</a><br>Details=20
are in photo captions.<br><br>I thought caterpillar tufts and hairs wer=
e=20
passive structures, moving<br>only as the body moves. But they must hav=
e=20
muscle control to wave<br>independently of one another like that. Are t=
hey a=20
modified antennae<br>or leg or? Can't find anything out searching t=
he=20
internet or in the<br>books I have so I will try here.<br><span><font c=
olor=3D"#888888"><br>Nancy<br></font></span></blockquote></div><br><br clea=
r=3D"all"><span><font color=3D"#888888">
<div><br></div>-- <br>Rick Whitman<br></font></span></div><span><font col=
or=3D"#888888"><a></a>
<p align=3D"left" color=3D"#000000">No virus found in this=20
message.<br>Checked by AVG - <a href=3D"http://www.avg.com" target=3D"_bl=
ank">www.avg.com</a><br>Version: 2013.0.3392 / Virus=20
Database: 3211/6585 - Release Date: 08/17/13</p></font></span></blockquot=
e></div>
</blockquote></div><br><br clear=3D"all"><div><br></div>-- <br>Rick Whitman=
<br>
</div></div>
--e89a8f5027c6b07e8204e4422b9b--
next message in archive
no next message in thread
previous message in archive
previous message in thread
Index of Subjects