Sea Shore Antics Forum Index Sea Shore Antics
This forum of www.seashoreantics.com is to glean or discuss info on UK sea shore wildlife and their antics, beit what they do, where they do it and why when and how.
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

sea anemones tearing into two

 
Post new topic   Reply to topic    Sea Shore Antics Forum Index -> SeaShoreAntics: It's what they do
View previous topic :: View next topic  
Author Message
Karen



Joined: 25 Oct 2004
Posts: 7
Location: Wiltshire

PostPosted: Tue Oct 26, 2004 12:07 am    Post subject: sea anemones tearing into two Reply with quote

saw it on the seashoreantics website - very original bit of info. How often do they do this

in a lifetime? Any knowledge on this would be great. The anemones were the Anemonia viridis

can be seen here:


http://www.seashoreantics.com/newspaper01.html

Karen Surprised
Back to top
View user's profile Send private message
Dave



Joined: 05 Nov 2004
Posts: 10
Location: Bristol

PostPosted: Fri Nov 05, 2004 12:35 am    Post subject: Reply with quote

Would like to know this as well, thanks.
Dave
Back to top
View user's profile Send private message
administration
Site Admin


Joined: 24 Oct 2004
Posts: 47
Location: Nearwater

PostPosted: Sat Nov 27, 2004 2:15 pm    Post subject: Reply with quote

Good thinking Karen.... Cant seem to get to the bottom of this one. After seeing them reproduce by the Longitudinal Fission process, it was

wondered which was the oldest and (assuming both are the same age) the reproduction process of:

adult gives birth
adult dies
young grows to

adult
adult gives birth
etc etc

....does not fit.

If both are the same age..... no matter how many times they split into two, if they are going to die

through old age, they will all die at the same time (surely?)

So have they the secret of eternal life!!?? Well possibly not, but cant seem to find a definitive answer

on:

How long they live for?
How many times they can/will reproduce in their lifetime?

Readers mission is to crack this mystery.

Stephen
Back to top
View user's profile Send private message Send e-mail Visit poster's website
Melanie



Joined: 25 Oct 2004
Posts: 26
Location: Torbay

PostPosted: Mon Dec 13, 2004 5:21 am    Post subject: Reply with quote

I remember our conversation about 'old age' and reasons for them deviding and thought the views might be relevant here.



These are only from the think tank and are not scientifically varified though:
They renew their relatively simple cellular layers all the

time or at least around time of fission and so the old cells are renewed by the new ones, so old age does not come into it.
The fission is to increase in numbers and

so increase their chance of sustaining their survival against such things as preditor and attrition rather than old age

Miss the think tanks so this forum is good

idea, thanks

Melanie
Back to top
View user's profile Send private message
administration
Site Admin


Joined: 24 Oct 2004
Posts: 47
Location: Nearwater

PostPosted: Tue Jan 25, 2005 6:45 pm    Post subject: Reply with quote

Mel.. here is the gist of the topic for the think tank:

Snakelock Anemones (Anemonia viridis) can reproduce

by Longitudinal Fission, in which case both bodies are the same age.

What I am interested to seek out is:
**What is their known life span, if any length has

been determined.
**How many times would they split in a life time.

Any knowledge/thoughts?

I have a theory through an inquiry

learning process

This as based on:
1. Both bodies being same age
2. Each body is a muticellular, but simple 'bag' design.

The theory

is that they, as a body, live forever (except for external influences such as disease and predation).
However, they renew themselves on a cellular level from the

inside out..... thus they live out a life span based on the time taken for the ''renewal of cell cycle'' (what ever this may be).



Somewhere within this ''renewal life span'', there will be enough surplus energy to go through the process of

''extra cell arrangement activity'' where the reward is another body by Longitudinal Fission, thus helping the survival of the species by

''increasing numbers'' so reducing the chances of being wiped out by such things as predation and disease.

.


Last edited by administration on Tue Jan 25, 2005 6:48 pm; edited 1 time in total
Back to top
View user's profile Send private message Send e-mail Visit poster's website
Sally



Joined: 24 Oct 2004
Posts: 12
Location: Surrey

PostPosted: Thu Jan 05, 2006 4:47 pm    Post subject: Reply with quote

Yes, by being a simple bag design, maybe they can reproduce the cells that have been used after a time span. Like our skin cells - we replace

the outer layer continuously.

The amazing bit that gets me is the fact that the anemone is an animal, yet I never understand how it ''thinks''. Where is its brain,

or at least its central nervous bit?

Sally
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Sea Shore Antics Forum Index -> SeaShoreAntics: It's what they do All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group