A Concept of Relation Between Physical and Biological Time in Animals

A. F. Alimov, T. I. Kazantseva

Zoological Institute, HAS
199034 St. Petersburg, Universitetskaya nub.. I
e-mail: model@zin.ru

A definition is proposed for biological ("internal") time X(t) for a growing organism whose weight variation obeys the law w(t): x(t) = l/c_w(t) = w(t)/w'(t), where t is physical ("external") time. w(t) is weight increase rate, and c_w(t) = w'(t)/w(t) is specific growth rate. Properties of functions т(t) and w(x) were studied for those cases when growth curves w(t) were described by Bertalanffy's or logistic equations.