Advances in Insect Physiology - download pdf or read online

By Stephen J. Simpson and Jeacuterocircme Casas (Eds.)

ISBN-10: 0123748291

ISBN-13: 9780123748294

This most recent quantity during this sequence comprises articles at the body structure of human and animal affliction vectors.

* Contributions from the prime researchers in entomology * Discusses the physiological variety in bugs * comprises in-depth reports with important details for numerous entomology disciplines

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Extra resources for Advances in Insect Physiology

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12 Model of integration of thermal and proprioceptive information. Heat emanating from the source stimulates thermoreceptors. The intensity of the thermal stimuli and the position of the thermoreceptors change when the insect moves its antennae under proprioceptive control. The insect may estimate the apparent size of the source through integration of information on both the intensity of the stimuli and the position of the antennae. Alternatively, the insect may use the inverse square relationship between energy and distance to determine the distance to the source, either through simultaneous comparisons of the heat energy reaching different parts of its body or through successive comparisons of the heat energy reaching a certain part of its body during its approach to the thermal source.

These factors not only determine whether or not insects respond to a given signal, but also how they respond. As we will discuss below, the identical stimulus may be attractive our repellent depending on the physiological state of the insect. Before analysing in detail how endogenous factors modulate the response to the presence of a host, we will briefly discuss the biological function or adaptive ORIENTATION TOWARDS HOSTS IN HAEMATOPHAGOUS INSECTS 37 value of such modulation. These factors minimize the costs and risks associated with feeding on blood, by making the insect feed only when necessary.

3 ЊC FIG. 5 cm). A temperature gradient is established along the antennae. The form and intensity of the gradient over each antenna varies as a function of the exact position of the organs during active movement. Preliminary experiments suggest that the way in which distance is estimated differs depending on whether the insect itself approaches a heat source or whether the source appears suddenly at a fixed position. In the second case, the insect reacts extending its proboscis when the source is at a much shorter distance.

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Advances in Insect Physiology by Stephen J. Simpson and Jeacuterocircme Casas (Eds.)

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