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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Gillian Sales,David Pyend river models are combined to determine the probability of exceeding a safe concentration. As an example the critical safe distance is determined for the case of an accidental spill, and a formal presentation is given for the case of a continuous (normally distributed) random input of pollutant ma

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access and control of water resources. This will ensure sustainable utilization and management of water resources. Traditional water management approaches should be evaluated, documented and used to complement scientific water resources management regimes.

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Gillian Sales,David Pyerious water bodies and the presented volume aims at filling some of those gaps. One should also mention about other EU directives, like the dangerous substances directive, drink978-1-4419-3606-6978-0-387-23322-2

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Gillian Sales,David Pyericas, and to discuss the alternatives available to improve the existing and future water quality conditions in a cost-effective and timely manner, the Third World Centre for Water M- agement in Mexico, the Nat978-3-642-06354-1978-3-540-30444-9Series ISSN 1614-810X Series E-ISSN 2198-316X

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bio-acoustics. 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 no

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Other Insects, a fluid (gas or liquid) as in the death’s head hawk moth, (4) shocks to the substrate, well known in the death watch beetle and (5) vibration of appendages such as the wings which produces the ‘droning’ sounds of bees and mosquitoes when in flight. So far ultrasounds are known to be produced by at least the first three of these methods.