The Insects - Outline of Entomology 3th Edition - Chapter 3 potx
The Insects - Outline of Entomology 3th Edition - Chapter 3 potx
... mixture of hormones, including JH-I, JH-II, JH-III, and JH-0. The occurrence of mixed-JH-producing insects (such as the tobacco hornworm, Manduca sexta)Box 3. 1 Molecular genetic techniques and their ... including: the meta-bolism of carbohydrates, lipids, and nitrogenous com-pounds; the storage of glycogen, fat, and protein; the synthesis and regulation of blood sugar; and the syn-thesis of major ... ringedhose 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...
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The Insects - Outline of Entomology 3th Edition - Chapter 1 ppt
... numbers of insects is the role of sexual selection in the diversifica-tion of many insects. The propensity of insects tobecome isolated in small populations (because of the fine scale of their ... classificationand their roles in our economic and wider lives. First,we outline the field of entomology and the role of ento-mologists, and then introduce the ecological functions of insects. Next, ... between the distribution of entomologists interested in biodiversityissues (the temperate northern hemisphere) and the centers of richness of the insects themselves (the tropicsand southern hemisphere).Studies...
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The Insects - Outline of Entomology 3th Edition - Chapter 2 pot
... defensive and other com-pounds are products of the epidermis, which is a near-continuous, single-celled layer beneath the cuticle.Many of these compounds are secreted to the outside of the insect ... pair of gonostyles (the third valves) derived from the distal part of the appendages of segment 9 (and homo-logous with the styles of the apterygotes mentionedabove). In each half of the ovipositor, ... 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 subcoxa,with the pleuron...
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The Insects - Outline of Entomology 3th Edition - Chapter 4 ppsx
... across. The field of view of each ommatidium differs from that of its neigh-bors and together the array of all ommatidia provides the insect with a panoramic image of the world. Thus, the actual ... insensitive to the wing tone of males of their species. Neither can the male detect the wing tone of immature females – the Johnson’s organin his antenna responds only to the wing tone of physio-logically ... tensormuscle controls the shape of the tymbal, thereby allow-ing alteration of the acoustic property. The noise of one or more clicks is emitted as the tymbal distorts, and further sounds may be...
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The Insects - Outline of Entomology 3th Edition - Chapter 5 pot
... 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 during ... oviposition in insects. 5.1 BRINGING THE SEXES TOGETHER Insects often are at their most conspicuous when syn-chronizing the time and place for mating. The flashinglights of fireflies, the singing of crickets, ... allow the valvesto slide back and forth on one another. Such move-ment, and sometimes also the presence of serrations on the tip of the ovipositor, is responsible for the pier-cing action of the...
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The Insects - Outline of Entomology 3th Edition - Chapter 6 pptx
... above, the value of K can be calculated for each of the experimental tem-peratures from 14 to 36 °C:Temperature (°C) 14 16 20 24 28 30 32 34 36 K 1008 2211 2 834 2921 2866 2755 2861 34 15 38 82Thus, ... further discus-sion of the actions of eclosion hormone). Apolysis at the end of the fifth larval instar marks the beginning of a prepupal period when the developing pupa is pharatewithin the ... supercooling include evacuation of the digestive system to remove the promoters of ice nucle-ation, plus pre-winter synthesis of polyols and anti-freeze agents. In these insects cold hardiness (potentialto...
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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, ... ormistaken. The fore-wing-derived halteres of strep-sipterans are gyroscopic organs of equilibrium with the same functional role as the halteres of Diptera (although the latter are derived from the ... because of conflicting evidence from immat-ure and adult insects, but, above all, they derive from the immense number of species (section 1 .3. 2).Scientists who study the taxonomy of insects...
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The Insects - Outline of Entomology 3th Edition - Chapter 9 ppt
... systems.Annual Review of Entomology 35 , 249–69.TIC09 5/20/04 4:44 PM Page 237 232 Ground-dwelling insects The Archaeognatha and Zygentoma represent the sur-viving remnants of a wider radiation of primitively ... complex circulation of air through the passageways of the nest, as illustrated for the above-ground nest of the African Macrotermes natalen-sis in Fig. 12.10. The origin of the mutualistic relationship ... farming by leaf-cutter ants The subterranean ant nests of the genus Atta (15 spe-cies) and the rather smaller colonies of Acromyrmex(24 species) are amongst the major earthen construc-tions in...
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The Insects - Outline of Entomology 3th Edition - Chapter 10 pdf
... hundreds of kilometers from shore in the Pacific Ocean. The dis-tribution of these insects coincides with mid-oceanicaccumulations of flotsam, where food of terrestrial origin supplements a diet of ... proponents of the pre-ferred exite–endite theory speculate that the progenitor of the pterygotes had aquatic immature stages. Supportfor the latter hypothesis appears to come from the factthat the ... into prox-imity by the stream flow.Many lotic insects are smaller than their counter-parts in standing waters. Their size, together with flex-ible body design, allows them to live amongst the cracksand...
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The Insects - Outline of Entomology 3th Edition - Chapter 11 ppsx
... Interpreting the early evolution of the angiosperms is contentious, partly because of the paucity of fossilized flowers prior to the period of radiation, and also because of the apparent rapidity of the ... nativerange. The host-specificity of potential control agentsmust be tested, either inside or outside the country of introduction and, in the former case, always in quaran-tine. The results of these ... sensory receptors of the wasp respond onlyto the volatile chemicals of its host fig, and the size andmorphology of the guarding scales of the fig ostioleallow entry only to a fig wasp of the “correct”...
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