Behavioral predictability, i.e., short-term intra-individual variability under relatively constant environmental conditions, has only recently begun to gain attention. It is unknown, however, whether predictability of individuals with distinct mean behavior changes differently as a response to ecological factors such as resource availability. Moreover, the response might be affected by anthropogenic contaminants that are ubiquitous in the environment and that can affect animals' variability in behavior. Here, we investigated the relationship between mean predatory activity and predictability in predatory activity along a prey density gradient in the lynx spider Oxyopes lineatipes. We further examined how this relationship is influenced by insecticides, azadirachtin, and a plant extract from Embelia ribes. We found that all studied variables affected the predictability. In the control and Embelia treatments, that did not differ significantly, the predictability decreased with increasing prey density in a mean behavior-specific way. Individuals with low mean predatory activity were relatively less predictable than were those with high activity from low to moderate prey densities but more predictable at high prey densities. Azadirachtin altered this pattern and the individuals with low predatory activity were less predictable than were those with high predatory activity along the whole gradient of prey density. Our results show that predictability can change along an environmental gradient depending on a mean behavior. The relative predictability of the individuals with distinct mean behavior can depend on the value of the environmental gradient. In addition, this relationship can be affected by anthropogenic contaminants such as pesticides.

Department of Chemistry Kasetsart University Kamphaeng Saen Nakhon Pathom Thailand

Department of Forest Ecology Mendel University in Brno Zemědělská 3 Brno Czech Republic

Department of Forest Protection and Wildlife Management Faculty of Forestry and Wood Technology Mendel University in Brno Zemědělská 3 Brno Czech Republic

Department of Science Faculty of Liberal Arts and Science Kasetsart University Kamphaeng Saen Nakhon Pathom Thailand

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Barrion AT, Litsinger JA, 1995. Riceland Spiders of South and Southeast Asia. Wallingford: CAB International.

Biro PA, Adriaenssens B, 2013. Predictability as a personality trait: consistent differences in intraindividual behavioral variation. Am Nat 182:621–629. PubMed

Briffa M, 2013. Plastic proteans: reduced predictability in the face of predation risk in hermit crabs. Biol Lett 9:20130592.. PubMed PMC

Briffa M, Bridger D, Biro PA, 2013. How does temperature affect behaviour? Multilevel analysis of plasticity, personality and predictability in hermit crabs. Anim Behav 86:47–54.

Chang CC, Teo HY, Norma-Rashid Y, Li D, 2017. Predator personality and prey behavioural predictability jointly determine foraging performance. Sci Rep 7:40734.. PubMed PMC

Cleasby IR, Nakagawa S, Schielzeth H, 2015. Quantifying the predictability of behaviour: statistical approaches for the study of between‐individual variation in the within‐individual variance. Methods Ecol Evol 6: 27–37.

Foelix R, 2011. Biology of Spiders. New York, USA: OUP.

He R, Pagani-Núñez E, Chevallier C, Barnett CR, 2017. To be so bold: boldness is repeatable and related to within individual behavioural variability in North Island robins. Behav Process 140:144–149. PubMed

Holling CS, 1965. The functional response of predators to prey density and its role in mimicry and population regulation. Mem Entomol Soc Canada 97:5–60.

Insung A, Pumnuan J, Chandrapataya A, 2008. Acaricidal activities of wild plant extracts against

Juliano SA, 2001. Nonlinear curve-fitting: predation and functional response curves In: Scheiner SM, Gurevitch J, editors. Design and Analysis of Ecological Experiments. 2nd edn.New York: Chapman & Hall; 178–196.

Kumar P, Poehling HM, 2006. Persistence of soil and foliar azadirachtin treatments to control sweet potato whitefly

Leelawan T, Chandrapatyab A, Vichitbandha P, 2010. Effect of the extracts of

Montiglio PO, Royauté R, 2014. Contaminants as a neglected source of behavioural variation. Anim Behav88:29–35.

Mathot KJ, Wright J, Kempenaers B, Dingemanse NJ, 2012. Adaptive strategies for managing uncertainty may explain personality‐related differences in behavioural plasticity. Oikos 121:1009–1020.

Maupin JL, Riechert SE, 2001. Superfluous killing in spiders: a consequence of adaptation to food-limited environments?. Behav Ecol 12:569–576.

Mayntz D, Raubenheimer D, Salomon M, Toft S, Simpson SJ, 2005. Nutrient-specific foraging in invertebrate predators. Science 307:111–113. PubMed

Michalko R, Košulič O, 2016. Temperature-dependent effect of two neurotoxic insecticides on predatory potential of

Michalko R, Pekár S, 2014. Is different degree of individual specialization in three spider species caused by distinct selection pressures?. Basic Appl Ecol 15:496–506.

Michalko R, Pekár S, 2017. The behavioral type of a top predator drives the short-term dynamic of intraguild predation. Am Nat 189:242–253. PubMed

Murphy F, Murphy J, 2000. An Introduction to the Spiders of South East Asia with Notes on all the Genera. Kuala Lumpur, Malaysia: Malaysian Nat; Soc.

Noosidum A, Sanguanpong U, Chandrapatya A, 2007. Toxicity of

Noosidum A, Chandrapatya A, 2015. Growth inhibition and feeding deterrence from leaf extracts of

Okuyama T, 2015. Optimal foraging behavior with an explicit consideration of within-individual behavioral variation: an example of predation. Evol Ecol 29:599–607.

Pekár S, 2012. Spiders (Araneae) in the pesticide world: an ecotoxicological review. Pest Manage Sci 68:1438–1446. PubMed

Pekár S, Brabec M, 2016. Modern Analysis of Biological Data. 1. Generalised Linear Models in R. Prag. Czech Republic: Scientia.

Pruitt JN, 2010. Differential selection on sprint speed and ad libitum feeding behaviour in active vs. sit‐and‐wait foraging spiders. Funct Ecol 24:392–399.

Pruitt JN, Bolnick DI, Sih A, DiRienzo N, Pinter-Wollman N, 2016. Behavioural hypervolumes of spider communities predict community performance and disbandment. Proc R Soc B283:20161409. PubMed PMC

Pruitt JN, DiRienzo N, Kralj-Fišer S, Johnson JC, Sih A, 2011. Individual-and condition-dependent effects on habitat choice and choosiness. Behav Ecol Sociobiol 65:1987–1995.

Pruitt JN, Krauel JJ, 2010. The adaptive value of gluttony: predators mediate the life history trade-offs of satiation threshold. J Evol Biol 23:2104–2111. PubMed

Pruitt JN, Riechert SE, 2012. The ecological consequences of temperament in spiders. Curr Zool 58:589–596.

R Development Core Team R. 2017. A Language and Environment for Statistical Computing. Vienna: R Foundation for Statistical Computing; http://www.R-project.org.

Řezáč M, Pekár S, Stará J, 2010. The negative effect of some selective insecticides on the functional response of a potential biological control agent, the spider

Riechert SE, 1991. Prey abundance vs diet breadth in a spider test system. Evol Ecol 5:327–338.

Riechert SE, Hedrick AV, 1993. A test for correlations among fitness-linked behavioural traits in the spider

Royauté R, Buddle CM, Vincent C, 2015. Under the influence: sublethal exposure to an insecticide affects personality expression in a jumping spider. Funct Ecol 29:962–970.

Samu F, Bíró Z, 1993. Functional response, multiple feeding and wasteful killing in a wolf spider (Araneae: Lycosidae). Eur J Entomol 90:471–476.

Sih A, Del Giudice M, 2012. Linking behavioural syndromes and cognition: a behavioural ecology perspective. Philos Trans Roy Soc Lond B Biol Sci 367:2762–2772. PubMed PMC

Shearer TA, Pruitt JN, 2014. Individual differences in boldness positively correlate with heart rate in orb-weaving spiders of genus Larinioides. Curr Zool 60:387–391.

Stamps JA, 2016. Individual differences in behavioural plasticities. Biol Rev 91:534–567. PubMed

Stamps JA, Briffa M, Biro PA, 2012. Unpredictable animals: individual differences in intraindividual variability (IIV). Anim Behav 83:1325–1334.

Stark JD, 2013. Effects of neem on spiders In: Nentwig W, editor. Spider ecophysiology. Heidelberg, Berlin: Springer; 441–447.

Stephens DW, Brown JS, Ydenberg RC, 2007. Foraging: Behavior and Ecology. Chicago: University of Chicago Press.

Stoffel MA, Nakagawa S, Schielzeth H, 2017. rptR: Repeatability estimation and variance decomposition by generalized linear mixed‐effects models. Methods Ecol Evol, doi: 10.1111/2041

Sundaram KMS, 1996. Azadirachtin biopesticide: a review of studies conducted on its analytical chemistry, environmental behaviour and biological effects. J Env Sci Health Part B 31:913–994.

Tambling CJ, Minnie L, Meyer J, Freeman EW, Santymire RM. et al. 2015. Temporal shifts in activity of prey following large predator reintroductions. Behav Ecol Sociobiol 69:1153–1161.

Toft S, 1999. Prey choice and spider fitness. J Arachnol 27:301–307.

Westneat DF, Fox CW, 2010. Evolutionary Behavioral Ecology. New York: Oxford University Press.

Westneat DF, Wright J, Dingemanse NJ, 2015. The biology hidden inside residual within‐individual phenotypic variation. Biol Rev 90:729–743. PubMed