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Dr Jolyon Troscianko

Dr Jolyon Troscianko

NERC Independent Research Fellow

 Tremough Innovation Centre 

 

Tremough Innovation Centre, University of Exeter, Penryn, Cornwall TR10 9TA

 Office hours:

I'm tucked away behind locked doors in TIC at the moment, but will be in the ESI cafe for open office hours on Fridays, 14:00-15:00

Overview

I’m currently a NERC Independent Research Fellow, investigating how the light environment and a habitat’s three-dimensional structure affect an animal’s camouflage.

Broad research specialisms:

  • Sensory ecology & evolution
  • Camouflage
  • Sensory modelling: I enjoy developing new technology and code to “see” through the visual systems of different animals.
  • Animal Behaviour & Learning

For more information, see my website.

Qualifications

2005 BA, Oxford
2006 MSc, Oxford
2012 PhD, Birmingham

Links

Research

Research grants

  • 2017 NERC
    NERC independent research fellow

Publications

Key publications | Publications by category | Publications by year

Publications by category


Journal articles

Troscianko J, Skelhorn J, Stevens M (In Press). Camouflage strategies interfere differently with observer search images. Proceedings of the Royal Society B: Biological Sciences Full text.
Heathcote R, Darden S, Troscianko J, Lawson MRM, Brown AM, Laker PR, Naisbett-Jones LC, MacGregor HEA, Ramnarine I, Croft DP, et al (In Press). Dynamic eye colour as an honest signal of aggression. Current Biology Full text.
Ligon RA, Diaz CD, Morano JL, Troscianko J, Stevens M, Moskeland A, Laman TG, Scholes E (In Press). Evolution of correlated complexity in the radically different courtship signals of birds-of-paradise. PLoS Biology Full text.
De Gasperin O, Duarte A, Troscianko J, Kilner RM (In Press). Fitness costs associated with building and maintaining the burying beetle's carrion nest. Sci Rep, 6 Abstract.  Author URL.
Gómez J, Ramo C, Stevens M, Liñán-Cembrano G, Rendón MA, Troscianko J, Amat JA (In Press). Latitudinal variation in biophysical characteristics of avian eggshells to cope with differential effects of solar radiation. Ecology and Evolution Full text.
Stevens M, Broderick AC, Godley BJ, Lown AE, Troscianko J, Weber N, Weber SB (In Press). Phenotype-Environment Matching in Sand Fleas. Biology Letters Full text.
Dalbosco Dell’Aglio D, Troscianko J, McMillan WO, Stevens M, Jiggins CD (In Press). The appearance of mimetic Heliconius butterflies to predators and conspecifics. Evolution Full text.
Troscianko J, Skelhorn J, Stevens M (2018). Camouflage strategies interfere differently with observer search images. Proceedings of the Royal Society B: Biological Sciences, 285(1886). Abstract.
Gómez J, Ramo C, Troscianko J, Stevens M, Castro M, Pérez-Hurtado A, Liñán-Cembrano G, Amat JA (2018). Individual egg camouflage is influenced by microhabitat selection and use of nest materials in ground-nesting birds. Behavioral Ecology and Sociobiology, 72, 142-142. Full text.
Koleček J, Šulc M, Piálková R, Troscianko J, Požgayová M, Honza M, Procházka P (2018). Rufous Common Cuckoo chicks are not always female. Journal of Ornithology Abstract.  Full text.
Holmes GG, Delferrière E, Rowe C, Troscianko J, Skelhorn J (2018). Testing the feasibility of the startle-first route to deimatism. Sci Rep, 8(1). Abstract.  Author URL.
Abernathy VE, Troscianko J, Langmore NE (2017). Egg mimicry by the Pacific koel: mimicry of one host facilitates exploitation of other hosts with similar egg types. Journal of Avian Biology, 48(11), 1414-1424. Abstract.
Stevens M, Troscianko J, Wilson-Aggarwal JK, Spottiswoode CN (2017). Improvement of individual camouflage through background choice in ground-nesting birds. Nature Ecology and Evolution, 1, 1325-1325. Full text.
Koski T-M, Lindstedt C, Klemola T, Troscianko J, Mäntylä E, Tyystjärvi E, Stevens M, Helander M, Laaksonen T (2017). Insect herbivory may cause changes in the visual properties of leaves and affect the camouflage of herbivores to avian predators. Behavioral Ecology and Sociobiology, 31, 97-97. Full text.
Troscianko J, Skelhorn J, Stevens M (2017). Quantifying camouflage: how to predict detectability from appearance. BMC Evolutionary Biology, 17, 7-7. Full text.
Troscianko J, Wilson-Aggarwal J, Griffiths D, Spottiswoode CN, Stevens M (2017). Relative advantages of dichromatic and trichromatic color vision in camouflage breaking. Behavioral Ecology, 28, 556-556. Full text.
Robledo-Ospina LE, Escobar-Sarria F, Troscianko J, Rao D (2017). Two ways to hide: predator and prey perspectives of disruptive coloration and background matching in jumping spiders. BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY, 122(4), 752-764. Author URL.
Medina I, Troscianko J, Stevens M, Langmore NE (2016). Brood Parasitism is Linked to Egg Pattern Diversity within and among Species of Australian Passerines. Am Nat, 187(3), 351-362. Abstract.  Author URL.  Full text.
Troscianko J, Wilson-Aggarwal J, Stevens M, Spottiswoode CN (2016). Camou age predicts survival in ground-nesting birds. Scientific Reports, 6 Full text.
Wilson-Aggarwal, Troscianko, Stevens M, Spottiswoode CN (2016). Escape distance in ground-nesting birds differs with individual level of camouflage. The American Naturalist, 188, 231-231. Full text.
Troscianko, Wilson-Aggarwal, Spottiswoode CN, Stevens M (2016). Nest covering in plovers: how modifying the visual environment influences egg camouflage. Ecology and Evolution, 6, 7536-7545. Full text.
Troscianko J, Rutz C (2015). Activity profiles and hook-tool use of New Caledonian crows recorded by bird-borne video cameras. Biol Lett, 11(12). Abstract.  Author URL.
Burriss R, Troscianko J, Lovell PG, Fulford AJC, Stevens M, Quigley R, Payne J, Saxton TK, Rowland HM (2015). Changes in Women’s Facial Skin Color over the Ovulatory Cycle are Not Detectable by the Human Visual System. PLoS ONE, 10, e0130093-e0130093.
Troscianko J, Stevens M, Skelhorn J (2015). Does Disruptive Camouflage Disrupt Search Image Formation?. PERCEPTION, 44(10), 1239-1240. Author URL.
Feeney WE, Troscianko J, Langmore NE, Spottiswoode CN (2015). Evidence for aggressive mimicry in an adult brood parasitic bird, and generalized defences in its host. Proc Biol Sci, 282(1810). Abstract.  Author URL.
Troscianko J, Stevens M (2015). Image Calibration and Analysis Toolbox – a free software suite for objectively measuring reflectance, colour and pattern. Methods in Ecology and Evolution, 6, 1320-1331. Full text.
Troscianko J (2014). A simple tool for calculating egg shape, volume and surface area from digital images. Ibis, 156(4), 874-878. Abstract.
Hughes AE, Troscianko J, Stevens M (2014). Motion dazzle and the effects of target patterning on capture success. BMC Evol Biol, 14 Abstract.  Author URL.
Troscianko J, Lown AE, Hughes AE, Stevens M (2013). Defeating crypsis: detection and learning of camouflage strategies. PLoS One, 8(9). Abstract.  Author URL.
Rutz C, Troscianko J (2013). Programmable, miniature video-loggers for deployment on wild birds and other wildlife. Methods in Ecology and Evolution, 4(2), 114-122. Abstract.
Stevens M, Troscianko J, Spottiswoode CN (2013). Repeated targeting of the same hosts by a brood parasite compromises host egg rejection. Nat Commun, 4 Abstract.  Author URL.
Stevens M, Marshall KLA, Troscianko J, Finlay S, Burnand D, Chadwick SL (2013). Revealed by conspicuousness: Distractive markings reduce camouflage. Behavioral Ecology, 24(1), 213-222. Abstract.
Stevens M, Troscianko J, Marshall KLA, Finlay S (2013). What is camouflage through distractive markings a reply to Merilaita et al. (2013). Behavioral Ecology, 24(5).
Troscianko J, von Bayern AMP, Chappell J, Rutz C, Martin GR (2012). Extreme binocular vision and a straight bill facilitate tool use in New Caledonian crows. Nat Commun, 3 Abstract.  Author URL.
Hughes A, Troscianko J, Tolhurst D, Stevens M (2012). Prey movement and the mechanisms of dazzle coloration. PERCEPTION, 41(10), 1271-1271. Author URL.
Rutz CR, Bluff LA, Reed N, Troscianko J, Newton J, Inger R, Kacelnik A, Bearhop S (2010). The Ecological Significance of Tool Use in New Caledonian Crows. Science, 329, 1523-1525. Abstract.
Bluff LA, Troscianko J, Weir AAS, Kacelnik A, Rutz C (2010). Tool use by wild New Caledonian crows Corvus moneduloides at natural foraging sites. Proc Biol Sci, 277(1686), 1377-1385. Abstract.  Author URL.
Takahashi T, McDougall C, Troscianko J, Chen W-C, Jayaraman-Nagarajan A, Shimeld SM, Ferrier DEK (2009). An EST screen from the annelid Pomatoceros lamarckii reveals patterns of gene loss and gain in animals. BMC Evol Biol, 9 Abstract.  Author URL.
Troscianko J, Bluff LA, Rutz C (2008). Grass-stem tool use in New Caledonian Crows Corvus moneduloides. Ardea, 96(2), 283-285. Abstract.
Lovell PG, Tolhurst DJ, Párraga CA, Baddeley R, Leonards U, Troscianko J, Troscianko T (2005). Stability of the color-opponent signals under changes of illuminant in natural scenes. J Opt Soc Am a Opt Image Sci Vis, 22(10), 2060-2071. Abstract.  Author URL.
Parraga CA, Troscianko T, Troscianko J, Tolhurst DJ, Leonards U (2003). Spatiochromatic properties of images of fruits and leaves from Kibale Forest, Uganda. Journal of Vision, 3(9). Abstract.
Troscianko T, Baddeley R, Parraga CA, Leonards U, Troscianko J (2003). Visual encoding of green leaves in primate vision. Journal of Vision, 3(9). Abstract.

Conferences

Lovell PG, Tolhurst DJ, Parraga CA, Baddeley RJ, Leonards U, Troscianko J, Troscianko T (2005). Opponent channel responses to changes in the illuminant of natural scenes for primates and birds.  Author URL.
Troscianko T, Parraga CA, Leonards U, Baddeley RJ, Troscianko J, Tolhurst DJ (2003). Leaves, fruit, shadows, and lighting in kibale forest, Uganda.  Author URL.

Publications by year


In Press

Troscianko J, Skelhorn J, Stevens M (In Press). Camouflage strategies interfere differently with observer search images. Proceedings of the Royal Society B: Biological Sciences Full text.
Heathcote R, Darden S, Troscianko J, Lawson MRM, Brown AM, Laker PR, Naisbett-Jones LC, MacGregor HEA, Ramnarine I, Croft DP, et al (In Press). Dynamic eye colour as an honest signal of aggression. Current Biology Full text.
Ligon RA, Diaz CD, Morano JL, Troscianko J, Stevens M, Moskeland A, Laman TG, Scholes E (In Press). Evolution of correlated complexity in the radically different courtship signals of birds-of-paradise. PLoS Biology Full text.
De Gasperin O, Duarte A, Troscianko J, Kilner RM (In Press). Fitness costs associated with building and maintaining the burying beetle's carrion nest. Sci Rep, 6 Abstract.  Author URL.
Gómez J, Ramo C, Stevens M, Liñán-Cembrano G, Rendón MA, Troscianko J, Amat JA (In Press). Latitudinal variation in biophysical characteristics of avian eggshells to cope with differential effects of solar radiation. Ecology and Evolution Full text.
Stevens M, Broderick AC, Godley BJ, Lown AE, Troscianko J, Weber N, Weber SB (In Press). Phenotype-Environment Matching in Sand Fleas. Biology Letters Full text.
Dalbosco Dell’Aglio D, Troscianko J, McMillan WO, Stevens M, Jiggins CD (In Press). The appearance of mimetic Heliconius butterflies to predators and conspecifics. Evolution Full text.

2018

Troscianko J, Skelhorn J, Stevens M (2018). Camouflage strategies interfere differently with observer search images. Proceedings of the Royal Society B: Biological Sciences, 285(1886). Abstract.
Gómez J, Ramo C, Troscianko J, Stevens M, Castro M, Pérez-Hurtado A, Liñán-Cembrano G, Amat JA (2018). Individual egg camouflage is influenced by microhabitat selection and use of nest materials in ground-nesting birds. Behavioral Ecology and Sociobiology, 72, 142-142. Full text.
Koleček J, Šulc M, Piálková R, Troscianko J, Požgayová M, Honza M, Procházka P (2018). Rufous Common Cuckoo chicks are not always female. Journal of Ornithology Abstract.  Full text.
Holmes GG, Delferrière E, Rowe C, Troscianko J, Skelhorn J (2018). Testing the feasibility of the startle-first route to deimatism. Sci Rep, 8(1). Abstract.  Author URL.

2017

Abernathy VE, Troscianko J, Langmore NE (2017). Egg mimicry by the Pacific koel: mimicry of one host facilitates exploitation of other hosts with similar egg types. Journal of Avian Biology, 48(11), 1414-1424. Abstract.
Stevens M, Troscianko J, Wilson-Aggarwal JK, Spottiswoode CN (2017). Improvement of individual camouflage through background choice in ground-nesting birds. Nature Ecology and Evolution, 1, 1325-1325. Full text.
Koski T-M, Lindstedt C, Klemola T, Troscianko J, Mäntylä E, Tyystjärvi E, Stevens M, Helander M, Laaksonen T (2017). Insect herbivory may cause changes in the visual properties of leaves and affect the camouflage of herbivores to avian predators. Behavioral Ecology and Sociobiology, 31, 97-97. Full text.
Troscianko J, Skelhorn J, Stevens M (2017). Quantifying camouflage: how to predict detectability from appearance. BMC Evolutionary Biology, 17, 7-7. Full text.
Troscianko J, Wilson-Aggarwal J, Griffiths D, Spottiswoode CN, Stevens M (2017). Relative advantages of dichromatic and trichromatic color vision in camouflage breaking. Behavioral Ecology, 28, 556-556. Full text.
Robledo-Ospina LE, Escobar-Sarria F, Troscianko J, Rao D (2017). Two ways to hide: predator and prey perspectives of disruptive coloration and background matching in jumping spiders. BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY, 122(4), 752-764. Author URL.

2016

Medina I, Troscianko J, Stevens M, Langmore NE (2016). Brood Parasitism is Linked to Egg Pattern Diversity within and among Species of Australian Passerines. Am Nat, 187(3), 351-362. Abstract.  Author URL.  Full text.
Troscianko J, Wilson-Aggarwal J, Stevens M, Spottiswoode CN (2016). Camou age predicts survival in ground-nesting birds. Scientific Reports, 6 Full text.
Wilson-Aggarwal, Troscianko, Stevens M, Spottiswoode CN (2016). Escape distance in ground-nesting birds differs with individual level of camouflage. The American Naturalist, 188, 231-231. Full text.
Troscianko, Wilson-Aggarwal, Spottiswoode CN, Stevens M (2016). Nest covering in plovers: how modifying the visual environment influences egg camouflage. Ecology and Evolution, 6, 7536-7545. Full text.

2015

Troscianko J, Rutz C (2015). Activity profiles and hook-tool use of New Caledonian crows recorded by bird-borne video cameras. Biol Lett, 11(12). Abstract.  Author URL.
Burriss R, Troscianko J, Lovell PG, Fulford AJC, Stevens M, Quigley R, Payne J, Saxton TK, Rowland HM (2015). Changes in Women’s Facial Skin Color over the Ovulatory Cycle are Not Detectable by the Human Visual System. PLoS ONE, 10, e0130093-e0130093.
Troscianko J, Stevens M, Skelhorn J (2015). Does Disruptive Camouflage Disrupt Search Image Formation?. PERCEPTION, 44(10), 1239-1240. Author URL.
Feeney WE, Troscianko J, Langmore NE, Spottiswoode CN (2015). Evidence for aggressive mimicry in an adult brood parasitic bird, and generalized defences in its host. Proc Biol Sci, 282(1810). Abstract.  Author URL.
Troscianko J, Stevens M (2015). Image Calibration and Analysis Toolbox – a free software suite for objectively measuring reflectance, colour and pattern. Methods in Ecology and Evolution, 6, 1320-1331. Full text.

2014

Troscianko J (2014). A simple tool for calculating egg shape, volume and surface area from digital images. Ibis, 156(4), 874-878. Abstract.
Hughes AE, Troscianko J, Stevens M (2014). Motion dazzle and the effects of target patterning on capture success. BMC Evol Biol, 14 Abstract.  Author URL.

2013

Troscianko J, Lown AE, Hughes AE, Stevens M (2013). Defeating crypsis: detection and learning of camouflage strategies. PLoS One, 8(9). Abstract.  Author URL.
Rutz C, Troscianko J (2013). Programmable, miniature video-loggers for deployment on wild birds and other wildlife. Methods in Ecology and Evolution, 4(2), 114-122. Abstract.
Stevens M, Troscianko J, Spottiswoode CN (2013). Repeated targeting of the same hosts by a brood parasite compromises host egg rejection. Nat Commun, 4 Abstract.  Author URL.
Stevens M, Marshall KLA, Troscianko J, Finlay S, Burnand D, Chadwick SL (2013). Revealed by conspicuousness: Distractive markings reduce camouflage. Behavioral Ecology, 24(1), 213-222. Abstract.
Stevens M, Troscianko J, Marshall KLA, Finlay S (2013). What is camouflage through distractive markings a reply to Merilaita et al. (2013). Behavioral Ecology, 24(5).

2012

Troscianko J, von Bayern AMP, Chappell J, Rutz C, Martin GR (2012). Extreme binocular vision and a straight bill facilitate tool use in New Caledonian crows. Nat Commun, 3 Abstract.  Author URL.
Hughes A, Troscianko J, Tolhurst D, Stevens M (2012). Prey movement and the mechanisms of dazzle coloration. PERCEPTION, 41(10), 1271-1271. Author URL.

2010

Rutz CR, Bluff LA, Reed N, Troscianko J, Newton J, Inger R, Kacelnik A, Bearhop S (2010). The Ecological Significance of Tool Use in New Caledonian Crows. Science, 329, 1523-1525. Abstract.
Bluff LA, Troscianko J, Weir AAS, Kacelnik A, Rutz C (2010). Tool use by wild New Caledonian crows Corvus moneduloides at natural foraging sites. Proc Biol Sci, 277(1686), 1377-1385. Abstract.  Author URL.

2009

Takahashi T, McDougall C, Troscianko J, Chen W-C, Jayaraman-Nagarajan A, Shimeld SM, Ferrier DEK (2009). An EST screen from the annelid Pomatoceros lamarckii reveals patterns of gene loss and gain in animals. BMC Evol Biol, 9 Abstract.  Author URL.

2008

Troscianko J, Bluff LA, Rutz C (2008). Grass-stem tool use in New Caledonian Crows Corvus moneduloides. Ardea, 96(2), 283-285. Abstract.

2005

Lovell PG, Tolhurst DJ, Parraga CA, Baddeley RJ, Leonards U, Troscianko J, Troscianko T (2005). Opponent channel responses to changes in the illuminant of natural scenes for primates and birds.  Author URL.
Lovell PG, Tolhurst DJ, Párraga CA, Baddeley R, Leonards U, Troscianko J, Troscianko T (2005). Stability of the color-opponent signals under changes of illuminant in natural scenes. J Opt Soc Am a Opt Image Sci Vis, 22(10), 2060-2071. Abstract.  Author URL.

2003

Troscianko T, Parraga CA, Leonards U, Baddeley RJ, Troscianko J, Tolhurst DJ (2003). Leaves, fruit, shadows, and lighting in kibale forest, Uganda.  Author URL.
Parraga CA, Troscianko T, Troscianko J, Tolhurst DJ, Leonards U (2003). Spatiochromatic properties of images of fruits and leaves from Kibale Forest, Uganda. Journal of Vision, 3(9). Abstract.
Troscianko T, Baddeley R, Parraga CA, Leonards U, Troscianko J (2003). Visual encoding of green leaves in primate vision. Journal of Vision, 3(9). Abstract.

Jolyon_Troscianko Details from cache as at 2018-12-11 19:52:59

Refresh publications

External Engagment and Impact

Invited lectures

I have been invited to give seminars at St Andrew's University, the British Trust for Ornithology, Copperbelt University (Zambia), and The Konrad Lorenz field station (Grünau , Austria). I have also given talks at various international conferences, such as ISBE (Lund & New York) and The Physical Cognition Workshop (Birmingham).


Media Coverage

My research has been covered by numerous media outlets, such as New Scientist and Nature.com. See

my website

for more info.

Teaching

Supervision / Group

Research Technicians

  • Emmanuelle Briolat

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