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Rain reverses diel activity rhythms in an estuarine teleost


Payne, NL and Van Der Meulen, DE and Gannon, R and Semmens, JM and Suthers, IM and Gray, CA and Taylor, MD, Rain reverses diel activity rhythms in an estuarine teleost, Proceedings of the Royal Society B Biological Sciences, 280, (1750) Article 20122363. ISSN 1471-2954 (2012) [Refereed Article]

Copyright Statement

Copyright 2012 The Author(s)

DOI: doi:10.1098/rspb.2012.2363


Activity rhythms are ubiquitous in nature, and generally synchronized with the day–night cycle. Several taxa have been shown to switch between nocturnal and diurnal activity in response to environmental variability, and these relatively uncommon switches provide a basis for greater understanding of the mechanisms and adaptive significance of circadian (approx. 24 h) rhythms. Plasticity of activity rhythms has been identified in association with a variety of factors, from changes in predation pressure to an altered nutritional or social status. Here, we report a switch in activity rhythm that is associated with rainfall. Outside periods of rain, the estuarine-associated teleost Acanthopagrus australis was most active and in shallower depths during the day, but this activity and depth pattern was reversed in the days following rain, with diurnality restored as estuarine conductivity and turbidity levels returned to pre-rain levels. Although representing the first example of a rain-induced reversal of activity rhythm in an aquatic animal of which we are aware, our results are consistent with established models on the trade-offs between predation risk and foraging efficiency.

Item Details

Item Type:Refereed Article
Keywords:accelerometry, chronobiology, circadian,rhythms, telemetry, zeitgeber
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Fisheries sciences not elsewhere classified
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - wild caught
Objective Field:Fisheries - recreational freshwater
UTAS Author:Semmens, JM (Professor Jayson Semmens)
ID Code:81839
Year Published:2012
Web of Science® Times Cited:40
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2013-01-09
Last Modified:2017-11-03

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