This paper is one of several contributions in a series, illustrating the application of a specific deductive methodology to explain diversity of form. The methodology facilitates the explanation of feeding morphologies in various ducks as a transformation of the mallard's feeding design maximized for specific proportions of performance that are contributed by pecking and filter feeding mechanisms.The earlier described anatomy and formal analyses of the three mechanisms in the mallard served as the initial conditions used in simulation models. Four elements (...) of the feeding system were chosen that play a major role in all three mechanisms. For each element, the main parameter was selected: storage capacity of the rostral mouth cavity, transport capacity of the rostral mouth tube, storage capacity of the caudal mouth cavity and transport capacity of the caudal mouth tube. The boundary conditions for the simulation were determined from internal organismic constraints. The total food uptake of the mallard was regarded as the function to be maximized. This object function is the summation of the food uptake by one second of pecking and one second of filter feeding. The drinking mechanism was shown not to interfere, since that mechanism operates sufficiently whenever the pumping mechanism works properly. (shrink)

Between Physics of Organism and Organismic Physics: Object and Method of Biology. In the history of biological theory one can observe an oscillation between two tendencies of thinking, namely the biologistic and the physicalistic point of view. Both aim at a general or unified theory of nature that is relevant for scientific research as well as for philosophical reflection. In terms of a pluralistic approach these two ways of theory-formation must be rejected. Biology e.g. as a specific natural science, characterized (...) by its mid-position between ‘nomothetic’ and ‘idiographic’ thinking (Windelband), is much more than a subordinate branch of physical knowledge. This very autonomy of biology does not only result from a special methodology or from a specific theoretical framework. On the contrary, the methodological and functional autonomy of biology is due to the very features of the phenomena investigated. These features include multitude, individuality and wholeness. (shrink)

Summary The concept of evolutionary epistemology has been critically discussed by philosophers who have mainly pointed to unacceptable philosophical tenets (cf. Vittorio Hösle, this Journal, Vol. 19 (1988), pp. 348–377). However, as most philosophers are extremely reluctant to critically treat the biological theories on which the ideas of evolutionary epistemology are based, the invalid concepts of adaption escaped their critical scrutiny. Therefore the influence of preconceived biological theories on the biological basis of evolutionary epistemology and the distorting consequences on the (...) philosophical level could not be elaborated. The following context sketches a new view of organismic reasoning and its impact on evolutionary aspects of epistemology. The basic theorem of adaptation is shown to be unacceptable and invalid if organisms are conceived as autonomous entities which can only evolve according to their specific internal organismic properties. (shrink)