<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote
In other words, they eat.
Absorbtion of nutrients from the water column is not eating anymore than me going out in to the sun to spur production of vitamin D or breathing to gain O2 and conviently enough N.
Anemones can absorb PO4/Nitrogen via resperation as well as via organic foods/zooplancton and the like. There is no evidece to refute/back up that they cannot live from the water column alone.
I never said anemones don't need food. But one also needs to keep in mind we are talking about Tropical anemones not deep ocean anemones. Tropical species are not found growing out of sunlight and until someone can prove otherwise require light and in many cases very strong light is one of the dominent requirements for the anemones health.
There are no studies that have shown that TROPICAL anemones need or don't require food either.
I'm not advocating that anyone stop feeding their tank or anemone but simply stating there is no evidence that tropical anemones will die or shrink or otherwise fail without the human aquarist feeding it food. The only evidence is that they require a source of nitrogen and phosphate and some complex protiens - And even that has recently come under some dispute I wish i could recall the articles unfortunately i can't.
As for you experiment its not only misleading at best but useless because it assumes that anemones don't use resparation to introduce needed nutrients to the anemone- an incorrect assumption. Your regular water changes and any PO4/N introduced can be used by the anemone. You also assume the anemone kept in the dark will be alive after a year - maybe- there is no proof only assumptions and yes the species does matter as they have evolved to live in various environments. A deep ocean anemone that normally lives in the dark may grow and multiply where as a tropical, light using anemone may waste a way and die regardless of how much food you stuff in it. Shimek's single test is hardly conclusive, plus our own ignorance of the care requirements could in and of itself cause the animal to die regardless of what we do.
Your point that "...to say light is far more important flies in the face of fact." not at all, there is NO scientific evidence that TROPICAL anemones need to be fed in order to survive. Do a search in Groups.google.com on feeding anemones and you will find a 200+ article thread where everyone -delbeek, harker and others weigh in on this very subject and discuss Shimeks assumptions and these very issues.
http://groups.google.com/groups?hl=en &threadm=3b8ee9ad%40212.18.160.197&rnum=5&prev=/groups%3Fq%3Dgroup:rec.aquaria.marine.reefs%2Bauthor aulo%26hl%3Den%26as_drrb%3Db%26as_mind%3D 29%26as_minm%3D8%26as_miny%3D2001%26as_maxd%3D6%26as_maxm%3D11%26as_maxy%3D2001%26rnum%3D5%26selm%3D3b8ee9ad%2540212.18.160.197
is the link.... its very very informative and usefull for this discussion
enjoy
[ November 06, 2001: Message edited by: leftovers ]</p>