This volume is devoted principally to the theme of behavioral develop ment. The study of ontogeny has attracted some of the most bitter and protracted controversies in the whole field of ethology and psychology. This is partly because the arguments have reflected more general and continuing ideological battles about nature and nurture. In the opening essay, Oppenheim shows how these debates have recurred in much the same form over the last century. His chapter also brings out a more worrying feature of such argument. He demonstrates that authors who are well known for their strongly held partisan views have written in much more balanced ways than is usually admitted. Although the ex cluded middle is familiar enough in academic argument, the dynamic tensions actually present in developing systems may be particularly prone to polarize debate about what is actually happening. This point is elegantly explored by Oyama in her essay on her concept of maturation."

This volume is subtitled "Alternatives" because we wanted to devote at least a part of it to the alternative ways in which members of the same species behave in a given situation. Not so very long ago the supposition among many ethologists was that if one animal behaved in a particular way, then all other members of the same age and sex would do the same. Any differences in the ethogram between individuals were to be attributed to "normal biological variation. " Such thinking is less common nowadays after the discovery of dramatic differences between members of the same species which are of the same age and sex. Alternative modes of behavior, though now familiar, raise particularly interesting questions about current function, evolutionary history, and mechanism. Do the differences rep resent equally satisfactory solutions to a given problem? Are some of the solutions the best that those animals can do, given their body size and general condition? Is an alternative solution adopted because so many other individuals have taken the first? If so, do the frequencies reached at equilibrium depend on differential survival of genetically distinct types or do they result from decisions taken by individual animals? If the alternatives are induced during development, as are the castes of social insects, what is required for such triggering? The questions about alternative ways of behaving are addressed in some of the chapters in this volume."

The current volume focuses on behavioral similarities and differences within individual animals, larger populations, and species as a whole. Research from ecological, social ontogenetic, physiological, and other perspectives is presented to explicate specific behaviors, as well as to provide a more profound understanding of how behavior work influences thought about evolutionary processes.

These essays are primarily concerned with the character of ethological research in the context of conflicts between animal and human interests. Specifically, to what extent is the projection into animals of human feelings a useful means to understand animal behavior? Annotation copyright Book News,

First published in 1976, this volume is a collection of essays by some of the most prominent and active ethologists. It is organized into four sections: motivation and perception, function and evolution, development, and human social relationships. The first three sections reflect the four questions which are basic to ethology: what were the immediate causes of a behaviour pattern; what is its biological function; how did it evolve; and how did it develop in the individual? The last section involves questions of all four types. The sections are introduced and linked by editorials and the book concludes with an important statement on asking the right questions. The essays are forward looking and identify areas of importance for the study of behaviour. The volume is a source of formative ideas for students, their teachers and research workers in a wide variety of disciplines in the biological psychological and social sciences.

Nine chapters on diverse topics that include: an analysis of whether sociobiology has killed ethology or revitalized it; aims, limitations, and the future of ethology and comparative ethology; the tyranny of anthropocentrism; psychoimmunology; gender differences in behavior; behavioral development.