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Our highly seasonal world restricts insect activity to brief portions of the year. This feature necessitates a sophisticated interpretation of seasonal changes and enactment of mechanisms for bringing development to a halt and then reinitiating it when the inimical season is past. The dormant state of diapause serves to bridge the unfavourable seasons, and its timing provides a powerful mechanism for synchronizing insect development. This book explores how seasonal signals are monitored and used by insects to enact specific molecular pathways that generate the diapause phenotype. The broad perspective offered here scales from the ecological to the molecular and thus provides a comprehensive view of this exciting and vibrant research field, offering insights on topics ranging from pest management, evolution, speciation, climate change and disease transmission, to human health, as well as analogies with other forms of invertebrate dormancy and mammalian hibernation.
Dormancy and Developmental Arrest: Experimental Analysis in Plants and Animals discusses the experimentation on states of suspended animation of living organisms. The book presents the range and complexity of interconnected processes involving structural, physiological, and molecular alterations in the organism. The text describes the physiological responses of animals and plants to environmental signals. It discusses the activities of nucleic acid and protein synthesis prior to dormancy state. The text also describes plant embryo development and the regulation of body temperature in dormant states. The book will provide valuable insights for biologists, zoologists, botanists, students, and researchers in the field of biology.
The Biology of the Coleoptera covers the branches of modern biology of Coleoptera. The book discusses the biological study of beetles; some skeletal peculiarities and the internal structures of the adults. The text also describes some structural features of larvae and pupae; food, digestion and the alimentary canal; and blood, osmoregulation, reserves, excretion and endocrine organs. The locomotion, respiration and energetics; the senses; and the cuticular properties, appearance, color and luminosity are also considered. The book further tackles the adult and larval behavior; the development and life-cycles; and the cytology and genetics. The text also looks into water beetles; special habitats; predation and defence; and symbiotic and parasitic relations. The ecological triangle: beetles, fungi and trees; and herbivorous beetles are also looked into. The book also discusses the role of beetles as ecological indicators; and the evolutionary history of beetles. Entomologists, ecologists, and biologists will find the book useful.
This balanced comprehensive account traces the alterations in body form undergone by insects as they adapt to seasonal change, exploring both theoretical aspects and practical issues. Topics explored include natural history, genetics, evolution, and management of insect adaptations.
Recent studies have shown that genetic polymorphisms play an important role in structuring the seasonal life cycles of insects, complementing an earlier emphasis on the effects of environmental factors. This book presents current ideas and recent research on insect life--cycle polymorphism in a series of carefully prepared chapters by international experts, covering the full breadth of the subject in order to give an up-to-date view of how life cycles are controlled and how they evolve. By consolidating our view of insect life--cycle polymorphism in this way, the book provides a staging point for further enquiries. The volume will be of interest to a wide variety of entomologists and other biologists interested in the control and evolution of life cycles and in understanding the extraordinarily complex ecological strategies of insects and other organisms.
This volume is an outgrowth of a Symposium entitled "Evolution of Escape in Space and Time" held at the XV International Congress of Entomology in Washington, D. C., USA in August, 1976. The choice of topic was prompted by recent advances in evolutionary ecology and the apparent suitability of insect migration and dia pause as appropriate material for evolutionary studies. In the event, that choice seems amply justified as I hope a perusal of these papers will show. These Sympos ium papers hardly cover the topic of the evolution of escape mechanisms exhaustively, and I am sure everyone will have his favorite lacuna. Some of the more obvious ones are indicated by Professor Southwood in his Concluding Remarks at the end of the book. The purpose of the Symposium, however, was not complete coverage, but rather to indicate the potential inherent in insect migration and diapause for the study of evolutionary problems. In that I think we have succeeded reasonably well. These papers are expanded and in some cases somewhat altered versions of the papers delivered in Washington. This has allowed greater coverage of the topics in question. I suggested a format of a general overview of a topic emphasizing the author's own research con tributions. In general the papers follow this outline although emphases vary. Two of the authors, Dr. Rainey and Dr. Lumme, were unable to attend the Symposium. Dr. Rainey's paper was read by Mr. Frank Walsh, but Dr.