Developmental plasticity in vision and behavior may help guppies overcome increased turbidity
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Increasing turbidity in streams and rivers near human activity is cause for environmental concern, as the ability of aquatic organisms to use visual information declines. To investigate how some organisms might be able to developmentally compensate for increasing turbidity, we reared guppies (Poecilia reticulata) in either clear or turbid water. We assessed the effects of developmental treatments on adult behavior and aspects of the visual system by testing fish from both developmental treatments in turbid and clear water. We found a strong interactive effect of rearing and assay conditions: fish reared in clear water tended to decrease activity in turbid water, whereas fish reared in turbid water tended to increase activity in turbid water. Guppies from all treatments decreased activity when exposed to a predator. To measure plasticity in the visual system, we quantified treatment differences in opsin gene expression of individuals. We detected a shift from mid-wave-sensitive opsins to long wave-sensitive opsins for guppies reared in turbid water. Since long-wavelength sensitivity is important in motion detection, this shift likely allows guppies to salvage motion-detecting abilities when visual information is obscured in turbid water. Our results demonstrate the importance of developmental plasticity in responses of organisms to rapidly changing environments.
KeywordsDevelopmental plasticity Opsin gene expression Poecilia reticulata Response to environmental change Turbidity
We thank members of the Sih, Breden, and Fangue labs for help with experimental design, and L. McLellan and H. Chmura for offering insightful comments on manuscript drafts. Special thanks to C. Ghalambor, D. Broder, S. Fitzpatrick, and C. McGaw for help in the field, as well as to stellar undergraduates for help in the lab—K. Horng, C. Runyan, M. Marin, and K. Frey. We also acknowledge the Trinidad and Tobago Ministry of Food Production, Land and Marine Affairs, Fisheries Division for issuing a collection and export permit. We also thank number of people who graciously lent equipment: N. Fangue and R. Connon provided a turbidity meter, K. Weinersmith provided filming equipment, and W. Davidson and K Lubieniecki permitted use of their qPCR machine. Funding was provided to SME through an NSF GRF and through a Center for Population Biology student research grant. SME would also like to thank BS, N. Prior, and FB for their hospitality while visiting Simon Fraser University to conduct gene expression assays. All procedures involving animals were in accordance with the ethical standards of UC Davis’ IACUC committee (protocol #17569).
- Bates D, Maechler M, Bolker B and Walker S. 2014 lme4: Linear mixed-effects models using Eigen and S4. R package version 1.1-7, http://CRAN.R-project.org/package=lme4
- Bolker BM (2015) Linear and generalized linear mixed models. In: Fox GA, Negrete-Yankelevich S, Sosa VJ (eds) Ecological statistics contemporary theory and application. pp 309–333Google Scholar
- Dukas R (1998) Evolutionary ecology of learning. In: Dukas R (ed) Cognitive ecology: the evolutionary ecology of information processing and decision making. University of Chicago Press, Chicago, pp 129–174Google Scholar
- Gray SM, McDonnell LH, Cinquemani FG, Chapman LJ (2012) As clear as mud: turbidity induces behavioral changes in the African cichlid Pseudocrenilabrus multicolor. Curr Zool 58:146–157Google Scholar
- Houde AE (1997) Sex, color, and mate choice in guppies. Princeton University Press, PrincetonGoogle Scholar
- R Core Team (2014) R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. http://www.R-project.org/
- Schreck CB, Olla BL, Davis MW (1997) Behavioral responses to stress. In: Iwama GK, Pickering AD, Sumpter JP, Schreck CB (eds) Fish stress and health in aquaculture. Cambridge University Press, Cambridge, pp 145–170Google Scholar
- Stamps J, Groothuis T (2010) The development of animal personality: relevance, concepts and perspectives. Biol Rev 85:301–325. doi:10.1111/j.1469-185X.2009.00103.x/,DanaInfo=onlinelibrary.wiley.com+fullGoogle Scholar
- Van Buskirk J (2012) Behavioural plasticity and environmental change. In: Candolin U, Wong BBM (eds). Behavioural responses to a changing world: mechanisms and consequences. pp 145–158Google Scholar
- Ward MN, Churcher AM, Dick KJ et al (2008) The molecular basis of color vision in colorful fish: four long wave-sensitive (LWS) opsins in guppies (Poecilia reticulata) are defined by amino acid substitutions at key functional sites. BMC Evol Biol 8:210. doi: 10.1186/1471-2148-8-210 PubMedCentralCrossRefPubMedGoogle Scholar
- West-Eberhard MJ (2003) Developmental plasticity and evolution. Oxford University Press, OxfordGoogle Scholar