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Snakelock Anemones..... Do they live for ever?

 
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Joined: 24 Oct 2004
Posts: 47
Location: Nearwater

PostPosted: Tue Jan 25, 2005 12:56 pm    Post subject: Snakelock Anemones..... Do they live for ever? Reply with quote

Snakelock Anemones (Anemonia viridis) can reproduce by Longitudinal

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

What we are 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?

Someone here has 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.
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Annabelle



Joined: 03 Nov 2004
Posts: 13
Location: Sussex

PostPosted: Sat Apr 30, 2005 11:39 am    Post subject: Reply with quote

I go along with the theory. It stands to reason that the simple cellular structual design is possible to be renewing itself all the time (like our skin

tissue does --- always being worn away or damaged from the outside and renewed by new replacement cellular tissues from below, reaching the surface).
Anemones

could be doing this for their 'sac' like design, quite easily.

The fission would be to increase numbers and so be a way of increasing chances of survival against

predation and such influences.

What an interesting thought/idea/theory to ponder.

Annabelle
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natalie
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Joined: 24 Oct 2004
Posts: 37
Location: Nearwater

PostPosted: Tue Sep 06, 2005 11:12 pm    Post subject: Reply with quote

Here are a few references of supposed observations, but they are from anemones observed in aquariums:

It

was reported that Dalyell kept a specimen of Actinia mesembryanthemun alive for 20 years.
The World of the Sea,

translated and enlarged by H.M. Hart. 1873. Cassell, Petter and Galpin, London


Flattely and Walton report that Dalyell kept this anemone for 60

years.
1922. The Biology of the Seashore. Sidgwick & Jackson, Ltd., London.

Hyman states that some anemones live at

least 50 years and probably even longer.
1940. The Invertebrates, Vol. 1. McGraw-Hill Book Company, New York.



This still doesn't confirm if they die from old age or just succumb (through fair time) to some factor that they cannot survive from.



Natalie
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