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PostPosted: Sat Oct 31, 2009 1:22 am 
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Joined: Fri Dec 24, 2004 10:39 pm
Posts: 2955
Location: Toronto Canada
http://resources.metapress.com/pdf-prev ... ze=largest


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PostPosted: Sat Oct 31, 2009 3:15 am 
Thanks Rag a very interesting piece. Ed


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PostPosted: Sat Oct 31, 2009 5:22 am 
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Joined: Fri Oct 21, 2005 8:35 am
Posts: 274
Location: Minnesota, USA
Interesting observations. I have noticed changes in my tank that has the scalares, leopoldis and rainbows since I put an automatic feeder on it. It feeds heavily three times per day. The fish have really filled out laterally and when viewed from head on they look quite sausage shaped, and the rainbows look really funny with their giant bodies and their tiny little heads poking out of them.

--Steve

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PostPosted: Sun Nov 01, 2009 3:30 am 
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Joined: Fri Dec 24, 2004 10:39 pm
Posts: 2955
Location: Toronto Canada
Steve, this man brought Ontario's U. of Guelph ( renowned for it's Vet college ) big funding from Axelrod, resulting in the Axelrod Institute.
Quote:
Dr. Axelrod has been a long time benefactor of the University of Guelph and has been particularly supportive of the Axelrod Institute of Ichthyology. His Stradivarius quartet made a tour (the Strad Rock Tour) to raise money for the Institute. In 1989, Dr. Axelrod donated a world class collection of museum-quality fossils to the University of Guelph. This donation ranks as one of the largest gifts ever made by an individual to a Canadian university.

I guess he's from around Jan's "neck of the woods". He offers simple yet profound ideas on evolution of the individual and of species
Quote:
A single cell – an egg – cannot be in the same stabilized state as a differentiated multicellular embryo or reproducing adult. The entire ontogeny must, therefore, consist of a sequence of stabilized states. Ontogeny of a phenotype cannot progress gradually but is a saltatory homeorhetic system, proceeding via natural thresholds from one self organized state to the next, hierarchically ever more complex and specialized. The natural boundaries of ontogeny – the far-from-stabilized thresholds – represent also states when changes can be easiest inserted or induced, and especially in the early ontogeny, from the intervals where evolution (change) can occur. As a result, ontogeny can also be divided into distinct life-history intervals called periods, be it embryo, larva (infant, pup), juvenile, adult and senescence, each divided in turn into phases, and each of these into natural steps. It is left to the imagination of scholars in social sciences to find parallels of saltation in economics and history.
explains stop of growth during reorganization, and explains why the developing fish ( or anything ) can go by one fork in the path or the other, the definitive phenotype or the altricial, the less specialized direction, at any time.


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