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A simple and inexpensive device to measure immersion times in wave exposed shores

Published online by Cambridge University Press:  21 November 2002

Roberto M. Venegas
Affiliation:
Estación Costera de Investigaciones Marinas and Center for Advanced Studies in Ecology and Biodiversity, P. Universidad Católica de Chile, Casilla 114-D, Santiago CP 6513677, Chile College of Oceanic and Atmospheric Sciences, Oregon State University, 104 Ocean Admin Building, Corvallis, Oregon 97331-5503, USA
Sergio A. Navarrete
Affiliation:
Estación Costera de Investigaciones Marinas and Center for Advanced Studies in Ecology and Biodiversity, P. Universidad Católica de Chile, Casilla 114-D, Santiago CP 6513677, Chile
Gerhard R. Finke
Affiliation:
Estación Costera de Investigaciones Marinas and Center for Advanced Studies in Ecology and Biodiversity, P. Universidad Católica de Chile, Casilla 114-D, Santiago CP 6513677, Chile
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Abstract

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An inexpensive and easy to build and deploy device to measure immersion times is described. The device consists of an LCD timer mounted in a small waterproof PVC housing. Time is recorded and integrated when seawater creates a connection between two stainless steel contacts. The device was tested in the laboratory and under field conditions on a wave swept shore. Under laboratory and field conditions, the device gave precise estimates of immersion times with maximum error of less than 4%. Applicability of this device in ecological and physiological studies is discussed and compared to other methods proposed in the literature.

Type
Research Article
Copyright
© 2002 Marine Biological Association of the United Kingdom