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AMPHIPODA AND DECAPODA AS POTENTIAL BIOINDICATORS OF WATER QUALITY IN AN URBAN STREAM (38 ◦ S, TEMUCO, CHILE) BY FRANCISCO CORREA-ARANEDA 1 ) , ANGEL CONTRERAS and PATRICIO DE LOS RÍOS Universidad Católica de Temuco, Facultad de Recursos Naturales, Escuela de Ciencias Ambientales, Casilla 15-D, Temuco, Chile ABSTRACT The benthic crustaceans in Chilean rivers and streams are characterized by their marked endemism and low species number. Ecological studies have indicated that some species may be used as indicators of water quality, considering the involvement of river basins in human agricultural, industrial, and urban activities. The aim of the present study
Contributors are: Patricia V. Agostino, Rocío Alcalá-Quintana, Fuat Balcı, Karin Bausenhart, Richard Block, Ivana L. Bussi, Carlos S. Caldart, Mariagrazia Capizzi, Xiaoqin Chen, Ángel Correa, Massimiliano Di Luca, Céline Z. Duval, Mark T. Elliott, Dagmar Fraser, David Freestone, Miguel A. García-Pérez, Anne Giersch, Simon Grondin, Nori Jacoby, Florian Klapproth, Franziska Kopp, Maria Kostaki, Laurence Lalanne, Giovanna Mioni, Trevor B. Penney, Patrick E. Poncelet, Patrick Simen, Ryan Stables, Rolf Ulrich, Argiro Vatakis, Dominic Ward, Alan M. Wing, Kieran Yarrow, and Dan Zakay.
Contributors are: Patricia V. Agostino, Rocío Alcalá-Quintana, Fuat Balcı, Karin Bausenhart, Richard Block, Ivana L. Bussi, Carlos S. Caldart, Mariagrazia Capizzi, Xiaoqin Chen, Ángel Correa, Massimiliano Di Luca, Céline Z. Duval, Mark T. Elliott, Dagmar Fraser, David Freestone, Miguel A. García-Pérez, Anne Giersch, Simon Grondin, Nori Jacoby, Florian Klapproth, Franziska Kopp, Maria Kostaki, Laurence Lalanne, Giovanna Mioni, Trevor B. Penney, Patrick E. Poncelet, Patrick Simen, Ryan Stables, Rolf Ulrich, Argiro Vatakis, Dominic Ward, Alan M. Wing, Kieran Yarrow, and Dan Zakay.
The present study addressed the interactions between processes of circadian and millisecond timing by testing whether the ability for temporal preparation is influenced both by individual differences in circadian rhythmicity and by the time of day at which a task is performed. A temporal preparation task that measures temporal orienting and sequential effects was administered to morning-type and evening-type groups of participants, both in morning and evening sessions. The results confirmed a synchrony effect on overall reaction time (RT), indicating that participants were most vigilant at their optimal time of day according to their specific chronotype. This synchrony effect, however, did not influence temporal orienting or sequential effects. These findings suggest that only processes mediating overall RT (vigilance) but not processes related to temporal preparation are susceptible to circadian influence. The current research thus supports the dissociation between circadian timing and temporal preparation.