Social Insects And The Environment

This volume includes 370 papers presented by leading scientists at the 11th International Congress of IUSSI at Bangalore, from August 5-11, 1990. The papers which have been classified into 30 sections relate to the symposia papers of the Congress. These cover various frontiers of research on social insects such as evolution of sociality, polygyny, social polymorphism, kin-recognition, kin- selection, foraging strategies, reproductive strategies, biogeography and phylogenetics of bees and ants pollination ecology and management of pestiferous social insects. The most important feature about these papers in this publication is that the results are presented in a crisp, brief and precise manner. Because of the brevity it has been possible to bring together, in one publication, almost all aspects of research on social insects from all parts of the world. The time between presentation of papers at a Congress and publication has been avoided by publishing this volume on the eve of the Congress and this enables scientists to refer to the results immediately.

In this pathbreaking and far-reaching work George Oster and Edward Wilson provide the first fully developed theory of caste evolution among the social insects. Furthermore, in studying the effects of natural selection in generally increasing the insects' ergonomic efficiency, they go beyond the concentration of previous researchers on the physiological mechanisms of the insects and turn our attention instead to the scale and efficiency of the insects' division of labor. Recognizing that the efficiency of the insect colony is based on a complex fitting of the division of labor to many simultaneous needs, including those imposed by the distribution of resources and enemies around the nest, Professors Oster and Wilson are able to construct a series of mathematical models to characterize the agents of natural selection that promote particular caste systems. The social insects play a key role in the subject of sociobiology because their social organization is so rigid and can be related to genetic evolution. Because of this important consideration, the authors' work has consequences not only for entomology but also for general evolutionary theory.

Claire Detrain, Jean-Louis Deneubourg and Jacques Pasteels Studies on insects have been pioneering in major fields of modern biology. In the 1970 s, research on pheromonal communication in insects gave birth to the dis cipline of chemical ecology and provided a scientific frame to extend this approach to other animal groups. In the 1980 s, the theory of kin selection, which was initially formulated by Hamilton to explain the rise of eusociality in insects, exploded into a field of research on its own and found applications in the under standing of community structures including vertebrate ones. In the same manner, recent studies, which decipher the collective behaviour of insect societies, might be now setting the stage for the elucidation of information processing in animals. Classically, problem solving is assumed to rely on the knowledge of a central unit which must take decisions and collect all pertinent information. However, an alternative method is extensively used in nature: problems can be collectively solved through the behaviour of individuals, which interact with each other and with the environment. The management of information, which is a major issue of animal behaviour, is interesting to study in a social life context, as it raises addi tional questions about conflict-cooperation trade-oft's. Insect societies have proven particularly open to experimental analysis: one can easily assemble or disassemble them and place them in controllable situations in the laboratory.

This book represents empirical studies of some aspect of the phenomenon of variability in social insect behavior. It illustrates the range of ways colony members can differ from one another and interprets the variability in terms of the external environment, social context, or individual experience.

Omnipresent in virtually all terrestrial ecosystems and of undisputed ecological and economical importance, the study of social insects is an area that continues to attract a vast number of researchers. As a consequence, a huge amount of information about their biology and ecology has accumulated. Distilling this scattered information into a highly focused reference, Food Exploitation by Social Insects: Ecological, Behavioral, and Theoretical Approaches unites traditional behavioral and ecological studies with theoretical and mathematical models. The book covers foraging ecology and behavior of social insects, their communication mechanisms, and theoretical models of important aspects. It examines two different but inseparably interlaced levels of social insect foraging: the macroscopic or colony level and the microscopic or individual level. The chapters include discussions of foraging decisions, patterns and strategies of social insect colonies, and information use and information transfer between workers. The book provides examples of how this biological knowledge can be used as a basis for the construction of mathematical and neural network models that in return may increase understanding of social insect foraging. The contributors provide a fresh look on their topics, covering a wide range of subjects and recent scientific developments that are unprecedented in breadth and depth. The coverage of ants, bees, and wasps in one resource is a unique feature of the book. This taxonomic content combined with the variety of research approaches, allows the book to provide deeper insight into the subject.