By Tony Stebbing

Maia is the tale of an idea, and its improvement right into a operating speculation, that offers a cybernetic interpretation of ways progress is managed. progress on the lowest point is managed by means of regulating the speed of development. entry to the output of keep an eye on mechanisms is supplied via perturbing the becoming organism, after which filtering out the results to progress expense. The output of the expansion keep an eye on mechanism is then available for interpretation and modeling. Perturbation experiments were used to supply interpretations of hormesis, the neutralization of inhibitory load and purchased tolerance to poisonous inhibition, and catch-up development. The account starts off with an advent to cybernetics protecting the rules of progress and inhabitants elevate in animals and guy and describes this new method of entry the keep an eye on of development approaches. This ebook is appropriate for postgraduate scholars of organic cybernetics and researchers of organic development, endocrinology, inhabitants ecology and toxicology.

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3. The growth of different year classes of the colonial bryozoan Flustra: (a) a young frond showing annual growth check lines, from which age can be determined and growth can be back-plotted; (b) back-plotted growth of the colonies in terms of height (mm) for nine year classes; (c) growth of the colonies in terms of number of zooids (×102) for seven year classes. Reproduced or redrawn with the kind permission of Springer Science+Business Media [5]. century as zoophytes, or plant-like animals. I remember learning that the herbarium collection at the British Museum of Natural History included many pressed bryozoans that were not passed on to the zoologists until the 1960s!

The virus disease, myxomatosis, was introduced into Europe and Australia from natural populations in South American rabbits, where the virus infected and killed vast numbers. THE PLAGUES OF EGYPT Explosive growth in numbers of plants and animals may result from the destabilisation of ecosystems, causing a cascade of linked consequences. The biblical account of the Plagues of Egypt given in Exodus provides some good examples. Of the ten plagues, at least seven were due to population explosions. There were plagues of frogs, flies, gnats and locusts, and three diseases caused by pathogenic micro-organisms.

Catch-up growth’ is another growth phenomenon that finds a ready explanation in a cybernetic interpretation of growth. After equilibration to some toxic load, the removal of load causes ‘relaxation stimulation’. This is an inevitable response to the sudden removal of load to which a control system had equilibrated. This typical feature of control mechanism output may well explain the origins of ‘catch-up’ growth in mammals, whose growth accelerates rapidly after being temporarily held back by sickness or deficiency (Chapter 11).

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