the insects an outline of entomology
the insects an outline of entomology
... 252 The importance, diversity, and conservation of insects Curiosity alone concerning the identities and lifestyles of the fellow inhabitants of our planet justifies the study of insects. Some of ... phytophagous insects. Another explanation for the high species numbers of insects is the role of sexual selection in the diversifica-tion of many insects. The propensity of insects tobecome isolated ... First,we outline the field of entomology and the role of ento-mologists, and then introduce the ecological functions of insects. Next, we explore insect diversity, and thendiscuss how we name and...
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the insects an outline of entomology
... 2 The importance, diversity, and conservation of insects Curiosity alone concerning the identities and lifestyles of the fellow inhabitants of our planet justifies the study of insects. Some of ... First,we outline the field of entomology and the role of ento-mologists, and then introduce the ecological functions of insects. Next, we explore insect diversity, and thendiscuss how we name and ... past and somecontinuing cultural and economic aspects of insects, their aesthetic and tourism appeal, and their import-ance as foods for humans and animals. We concludewith a review of the...
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The Insects - Outline of Entomology 3th Edition - Overview ppsx
... iiThird Edition The Insects An Outline of Entomology P.J. Gullan and P.S. CranstonDepartment of Entomology, University of California, Davis, USAWith illustrations byK. Hansen McInnesTIA01 ... namely the ecology of ground-dwelling, aquatic and plant-feeding insects, and the behaviours of sociality, predation and para-sitism, and defence. Finally, aspects of medical and veterinary entomology ... assessment of birds as predators of insects. Our recent travels have taken us to countries inwhich insects form an important part of the humandiet. In southern Africa we have seen and eatenmopane, and...
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The Insects - Outline of Entomology 3th Edition - Chapter 1 ppt
... First,we outline the field of entomology and the role of ento-mologists, and then introduce the ecological functions of insects. Next, we explore insect diversity, and thendiscuss how we name and ... past and somecontinuing cultural and economic aspects of insects, their aesthetic and tourism appeal, and their import-ance as foods for humans and animals. We concludewith a review of the ... phytophagous insects. Another explanation for the high species numbers of insects is the role of sexual selection in the diversifica-tion of many insects. The propensity of insects tobecome isolated...
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The Insects - Outline of Entomology 3th Edition - Chapter 2 pot
... lip” (Fig. 2.10). The labrum forms the roof of the preoral cavity and mouth (Fig. 3.14) and covers the base of the mandibles; it may be formed from fusion of parts of apair of ancestral appendages. ... crickets, and earwigs, the mouthparts are of a biting and chewing type(mandibulate) and resemble the probable basic design of ancestral pterygote insects more closely than the mouthparts of the majority ... 44Ephemeroptera and Odonata. Primitively, two furthersegments lie proximal to the coxa and in extant insects one of these, the epicoxa, is associated with the wingarticulation, or tergum, and the other, the...
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The Insects - Outline of Entomology 3th Edition - Chapter 3 potx
... to be the primarymechanism for the movement of gases in the tracheaeand is always the sole mode of gas exchange at the tissues. The efficiency of diffusion is related to the dis-tance of diffusion ... circulation, the tracheal system and gas exchange, the gut and diges-tion, the fat body, nutrition and microorganisms, the excretory system and waste disposal, and lastly the reproductive organs and ... of a vacuum cleaner). The cuticular linings of the tracheae are shed with the rest of the exoskeleton when the insect molts. Usually even the linings of the finestbranches of the tracheal system...
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The Insects - Outline of Entomology 3th Edition - Chapter 4 ppsx
... membrane, such that one half closelyconnects with the anterior and the other half with the posterior tympanal membrane. The primary route of sound to the tympanal organ is usually from the acoustic ... organ in the tibia approximates the function of a horn andamplifies the sound. Although the slits of the tympanicchambers do allow the entry of sound, their exact func-tion is debatable. They ... in the time of arrival of sound waves at the tympanum can be detected bypressure differences across the membrane.Whatever the major route of sound entry to the tym-panal organs, air- and...
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The Insects - Outline of Entomology 3th Edition - Chapter 5 pot
... – the transfer of sperm via the insertion of part of the male’s aedeagus (edeagus), the penis, into the repro-ductive tract of the female. In males of many species the extrusion of the aedeagus ... messengers) and alsocontrol the synthesis of two groups of insect hormones– the ecdysteroids and the juvenile hormones (JH).More detailed discussions of the regulation and func-tions of all of these ... 9.8) and the frothy ootheca of mantids (see Plate 3.3, facing p. 14), whereas the foamyootheca that surrounds locust and other orthopteraneggs in the soil is formed from the accessory glands...
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The Insects - Outline of Entomology 3th Edition - Chapter 6 pptx
... in insects is the result of the large amount of yolk in the egg. The blastoderm usually gives rise toall the cells of the larval body, whereas the central yolkypart of the egg provides the ... affects the eggs of the next generation. The ability of insects to recognize seasonal photo-period and other environmental cues requires somemeans of measuring time between the cue and the subsequent ... amongst the mostthermally tolerant land animals because they canaccumulate high levels of “heat-shock proteins” inadvance of their departure to forage from their (cool)burrow to the ambient...
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The Insects - Outline of Entomology 3th Edition - Chapter 7 pdf
... aswings held roof-like over the abdomen, fore wingseither membranous or in the form of tegmina of uni-form texture, and with the rostrum arising ventrallyclose to the anterior of the thorax, ... moderate-sized, soft-bodied insects with anteriorly projecting mandibulate mouthpartsand the compound eyes are either reduced or absent. The antennae are multisegmented and the mouthpartsmandibulate. The ... possession of a particular kind of gut filter chamber, a rostrum thatappears to arise between the bases of their front legsand, if winged, by absence of the vannus and vannalfold in the hind...
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