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| Snakelocks anemone, Anemonia
viridis |
| Created by Andy Horton on 04 Sep
2000 23:42:36 |
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Message |
| 1 |
Date Posted: 04 Sep 2000 23:42:36
by Andy
Horton   
Hello,
Snakelocks anemone, Anemonia viridis.
Andrew Flatt is not a member of the group, but he has
requested the following
information. Is anybody able to help him
out?
The reply should be directly to:
A.Flatt@ukgateway.net
Cheers
Andy
Horton.
Hi Again,
I hope you remember my previous
e-mails regarding the populations of this
specimen. I am now
about to complete my study and my teacher in his infinite
wisdom
thinks that more results would assist the project. I was
therefore
hoping that you could provide some results from an
alternate stretch of
coast line. I require data from the lower
and middle shores. organism size
along their longest axis and the
number found per meter square. I need
approximately 50 different
anenomia from the lower and middle shore. Please
also include the
name of the beach. I hope that you may accommodate me and I
hope
that this does not cause you too many problems.
Yours
Sincerely.
Andrew Flatt
P.s. how are your snakes lock
coming along are they still dividing?
Again Many
Thanks.
Snakelocks anemone, Anemonia viridis.
Reports:
Results collected from an Exposed Shore, West
Angle Bay (SM 853 033),
Pembrokeshire, Wales
Lower Shore,
Average coverage= 3.2/meter square
Average Size= 32.9 mm diameter
(along the longest axis)
Middle Shore, Average Cover= 1.8/meter
square
Average Size= 29.0 mm diameter (along the longest
axis)
Andrew Flatt
|
| 2 |
Date Posted: 05 Sep 2000 10:44:23
by Andy
Horton
Hello
Andrew,
Snakelocks Anemone, Anemonia viridis
Snakelok.htm
For
purposes of a comparative shore, I have chosen Worthing Beach,
Sussex,
and the area covered is restricted to the area
immediately underneath the
pier supports.
Worthing Pier,
Sussex.
wpier.htm
.Wpier2.htm Wpier3.htm
These pages contain a brief
description of the shore, but not in complete
detail. I plan to
fill in the detail later when I have more time. If there
is any
extra information you need, please ask.
Point One: Anemonia
viridis are right on their edge of biogegraphical distribution
at
Worthing and the numbers are much less that in SW Wales. Also the
day
at the end of August 2000 <Wpier3.htm> had less
numbers of A.
viridis than from previous
years.
Furthermore, the numbers are estimates.
Lower
Shore, Average coverage= 0.5/per square metre.
Average Size= 22
mm diameter (measurements taken of the base diameter
taken
underwater, tentacle span doubles this size and sometimes
more).
Middle Shore, Average Cover= only 1 specimen in 50 square
metres
Average Size= 20 mm diameter (measurements taken of the
base diameter
taken underwater, tentacle span doubles this
size)
This specimen was distintegrating and throwing off
tentacles all over, the
first time I have seen this species do
this. In captivity (the only one
collected) it continued to throw
off tentacles at first, but it has survived.
The largest one
ever collected at Worthing was 33 mm growing to 48 mm
base
diameter in captivity. They usually divide at about 25
mm.
Did you measure the base or span including the
tentacles?
The numbers had not shown any signs of recent
division. Sometimes the number
can double by the following tide.
Meadfoot, Devon, on a previous occasion the middle shore
numbers were about
50 per square metre, in places the edges of
the small pools were continuous
Anemonia viridis effectively
preventing anything else living in the pools.
These anemones
probably averaged about 20 mm base diameter.
Meadfoot is a
rocky outcrop in the middle of a sandy beach.
I would
appreciate a summary of your findings, &/or a copy of the
final
thesis or report (electronically in a *.RTF or *.HTM file
is best).
Cheers
Andy Horton.
British Marine Life
Study Society.
Author wrote:
> Snakelocks anemone,
Anemonia viridis.
> Reports:
> Results collected from
an Exposed Shore, West Angle Bay (SM 853 033),
>
Pembrokeshire, Wales
> Lower Shore, Average coverage=
3.2/meter square
> Average Size= 32.9 mm diameter (along the
longest axis)
> Middle Shore, Average Cover= 1.8/meter
square
> Average Size= 29.0 mm diameter (along the longest
axis)
> Andrew Flatt (Abridged original)
|
| 3 |
Date Posted: 05 Sep 2000 17:54:10
by Jon
Makeham
My records caome
from Hannafore Point, West Looe Cornwall, a rocky
intertidal reef
extending for around 800m along the shore.
Records from
August 1999
Lower shore, average coverage (from pools,
exposed substrate) 4.2 meter
square
Average size (across basal
disc) 45mm (largest 80mm+)
Middle shore, average coverage 1.2
meter square
Average size 30mm
Hope this
helps
Jon.
----- Original Message -----
From: <Glaucus@hotmail.com>;
To:
<glaucus@smartgroups.com>;
Sent:
Tuesday, September 05, 2000 10:44 AM
Subject: [glaucus] RE:
Snakelocks anemone, Anemonia viridis
> Hello
Andrew,
>
> Snakelocks Anemone, Anemonia viridis
>
Snakelok.htm
>
>
For purposes of a comparative shore, I have chosen Worthing Beach,
Sussex,
and the area covered is restricted to the area
immediately underneath the
pier supports.
>
>
Worthing Pier, Sussex.
> wpier.htm
.Wpier2.htm
Wpier3.htm
>
> These pages contain
a brief description of the shore, but not in complete
detail. I
plan to fill in the detail later when I have more time. If
there
is any extra information you need, please
ask.
>
> Point One: Anemonia viridis are right on their
edge of biogegraphical
distribution at Worthing and the numbers
are much less that in SW Wales.
Also the day at the end of August
2000 <Wpier3.htm> had less numbers of
A. viridis than
from previous years.
>
> Furthermore, the numbers are
estimates.
>
> Lower Shore, Average coverage= 0.5/per
square metre.
> Average Size= 22 mm diameter (measurements
taken of the base diameter
taken underwater, tentacle span
doubles this size and sometimes more).
> Middle Shore, Average
Cover= only 1 specimen in 50 square metres
> Average Size= 20
mm diameter (measurements taken of the base diameter
taken
underwater, tentacle span doubles this size)
> This specimen
was distintegrating and throwing off tentacles all over,
the
first time I have seen this species do this. In captivity
(the only one
collected) it continued to throw off tentacles at
first, but it has
survived.
>
> The largest one ever
collected at Worthing was 33 mm growing to 48 mm
base diameter in
captivity. They usually divide at about 25 mm.
>
> Did
you measure the base or span including the
tentacles?
>
> The numbers had not shown any signs of
recent division. Sometimes the
number can double by the following
tide.
>
> Meadfoot, Devon, on a previous occasion the
middle shore numbers were
about 50 per square metre, in places
the edges of the small pools were
continuous Anemonia viridis
effectively preventing anything else living in
the pools. These
anemones probably averaged about 20 mm base
diameter.
>
> Meadfoot is a rocky outcrop in the middle
of a sandy beach.
>
> I would appreciate a summary of
your findings, &/or a copy of the final
thesis or report
(electronically in a *.RTF or *.HTM file is best).
>
>
Cheers
>
> Andy Horton.
> British Marine Life
Study Society.
>
>
> Author wrote:
> >
Snakelocks anemone, Anemonia viridis.
> > Reports:
>
> Results collected from an Exposed Shore, West Angle Bay (SM 853
033),
> > Pembrokeshire, Wales
> > Lower Shore,
Average coverage= 3.2/meter square
> > Average Size= 32.9
mm diameter (along the longest axis)
> > Middle Shore,
Average Cover= 1.8/meter square
> > Average Size= 29.0 mm
diameter (along the longest axis)
> > Andrew Flatt
(Abridged original)
>
>
>
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