Subject: | |
From: | |
Reply To: | |
Date: | Fri, 11 Jan 2008 15:18:42 -0600 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
I know on Kwajalein 4 degrees north the Lambis chiragra lives nicely.
It is widely distributed across the Atoll.and I suspect Micronesia.
Wonder if the locals over collected them for food.
Martin
Chris Takahashi wrote:
> Aloha Conchers,
> In Hawaii Pustularia takahashii started appearing in the fossil records at
> the 15ft level(roughly 150,000yrs ago). Same level where 2 endemic
> species, Conus kahiko & Strombus ostergaardi, disappeared. Commonly found
> at this level to present strata are Conus pennaceus & Cypraea maculifera
> hawaiensis. During this era the Hawaiian Islands were much closer to the
> Equator due to plate techtonics. One would think the North-Eastward plate
> movement towards colder waters might have have changed the local species.
> This means the water temperature gets colder as time goes on & some
> species may die-off while others establish themselfs.
>
> Look at Lambis chiragra. This species prefer warmer temperatures & was
> present in Hawaiian fossil records 150,000yrs ago. Today no chiragra
> occurs in Hawaii. Could the colder waters restrict veliger developement?
> Or could the location of the islands in comparison to the Equator limit
> the veliger range of dispersion & settlement from other Indo-Pacific
> Islands? One must also consider the ocean level 150,000yrs ago in Hawaii
> was 15ft higher before the last ice age. Also 1.5 million yrs ago small
> Midway Atoll was a large major mountaneous Hawaiian Island roughly where
> Oahu is today. CHRIS:)
>
> ----------------------------------------------------------------------
> [log in to unmask] - a forum for informal discussions on molluscs
> To leave this list, click on the following web link:
> http://listserv.uga.edu/cgi-bin/wa?SUBED1=conch-l&A=1
> Type your email address and name in the appropriate box and
> click leave the list.
> ----------------------------------------------------------------------
>
>
>
--
Martin H. Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
TSRA, Endowed; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal.
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member.
http://lufkinced.com/
----------------------------------------------------------------------
[log in to unmask] - a forum for informal discussions on molluscs
To leave this list, click on the following web link:
http://listserv.uga.edu/cgi-bin/wa?SUBED1=conch-l&A=1
Type your email address and name in the appropriate box and
click leave the list.
----------------------------------------------------------------------
|
|
|