Titlebook: Ultrasonic Communication by Animals; Gillian Sales,David Pye Book 1974 G. D. Sales and J. D. Pye 1974 acoustics.animals.behavior.biologica

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Book 1974tics. In the last 35 years a completely new branch of bio­ acoustics, involving ultrasounds, has been made possible by technical developments that now allow these inaudible sounds to be detected and studied. This subject has a personal fascination for the authors, perhaps because of the novelty of ‘

Fulminate

Countermeasures by Insects,that some of these insects have evolved means of protecting themselves from attack. This chapter will examine the countermeasures that have been adopted by moths and some other nocturnal insects in their battle for survival.

annexation

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Ultrasound in Rodents,, hamsters and their allies. Pure ultrasounds have so far been found in only one of these sub-orders, the Myomorpha, and in only two families within this group. These are the family Muridae, which includes rats and mice and the family Cricetidae which includes hamsters, voles, gerbils and lemmings.

myopia

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Gillian Sales,David Pyelutants into water suppliesWater resources are under stress worldwide and one of the elements of this stress - man‘s impact on water quality constitutes a key problem especially in well-developed countries. This problem receives an increasing attention of the public, politicians, decision makers now

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Gillian Sales,David Pyethe practices, and future implications of the impacts of theConsiderable attention has been given during the past few years to the water crisis that many regions of the world may face in the coming decades. While the mag- tude and the extent of the global water scarcity problems of the future should

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observatory

难取悦

Gillian Sales,David Pyed for two basic reasons. First, an efficientinformation system is required to satisfy the needs of water qualitymanagement plans and to aid in the decision-making process. Second,this system has to be realized under the constraints of limitedfinancial resources, sampling and analysis facilities, and