## Frontiers in Mathematical BiologyFrom a mathematical point of view, physiologically structured population models are an underdeveloped branch of the theory of infinite dimensional dynamical systems. We have called attention to four aspects: (i) A choice has to be made about the kind of equations one extracts from the predominantly verbal arguments about the basic assumptions, and subsequently uses as a starting point for a rigorous mathematical analysis. Though differential equations are easy to formulate (different mechanisms don't interact in infinites imal time intervals and so end up as separate terms in the equations) they may be hard to interpret rigorously as infinitesimal generators. Integral equations constitute an attractive alternative. (ii) The ability of physiologically structured population models to increase our un derstanding of the relation between mechanisms at the i-level and phenomena at the p-level will depend strongly on the development of dynamical systems lab facilities which are applicable to this class of models. (iii) Physiologically structured population models are ideally suited for the for mulation of evolutionary questions. Apart from the special case of age (see Charlesworth 1980, Yodzis 1989, Caswell 1989, and the references given there) hardly any theory exists at the moment. This will, hopefully, change rapidly in the coming years. Again the development of appropriate software may turn out to be crucial. |

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### Contents

20 | |

Genomes Maps and Sequences | 28 |

Cell Protrusions | 53 |

Theories of Elementary Behavior | 79 |

Frontiers in Organismal Biology | 103 |

Toward Artificial Competence | 117 |

Puzzles About Excitable Media and Sudden Death | 139 |

Immune Networks and Immune Responses | 159 |

Modelling Social Animal Aggregations | 296 |

Spatial Chaos and its Role in Ecology and Evolution | 326 |

Speculations on the Future of Food Webs | 346 |

On the Equilibrium of Living Beings by Means of Reciprocal Destruction | 360 |

Frontiers in Ecosystem Science | 381 |

A Metaphysiological Approach to Modeling Ecological Populations and Communities | 411 |

The Trophodynamics of Whole Ecological Communities | 443 |

Frontiers in Applied Biology | 493 |

A Clue to Some Problems of NeoDarwinism | 174 |

The Changing Role of Population Genetics Theory | 186 |

Some Advantages and Disadvantages of Recombination | 198 |

A Brief Intellectual History | 212 |

The Undiscovered Country | 238 |

Stochastic Demography and Life Histories | 254 |

Structured Population Dynamics | 280 |

Uncertainty and Fisheries Management | 516 |

Health Information in Developing Countries | 550 |

What Everyone Should Know About the BelousovZhabotinsky Reaction | 569 |

Avoiding Chaos | 588 |

Some Remarks on Estimation Techniques for SizeStructured Population Models | 609 |

625 | |

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