Quantifying colour difference in animals with variable
patterning

J 2020

Quantifying colour difference in animals with variable patterning

DRAČKOVÁ, Tereza, Radovan SMOLINSKÝ, Zuzana HIADLOVSKÁ, Matej DOLINAY, Natália MARTÍNKOVÁ et. al.

Základní údaje

Originální název

Quantifying colour difference in animals with variable patterning

Autoři

DRAČKOVÁ, Tereza (203 Česká republika, domácí), Radovan SMOLINSKÝ (703 Slovensko, domácí), Zuzana HIADLOVSKÁ (703 Slovensko), Matej DOLINAY (703 Slovensko, domácí) a Natália MARTÍNKOVÁ (703 Slovensko, garant, domácí)

Vydání

Journal of Vertebrate Biology, 2020, 2694-7684

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10613 Zoology

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Kód RIV

RIV/00216224:14310/20:00117311

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.25225/jvb.20029

UT WoS

000588646400001

Klíčová slova anglicky

colouration; Reptilia; image analysis; colour pattern; RGB; CIELAB

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 3. 5. 2021 14:10, Mgr. Marie Šípková, DiS.

Anotace

V originále

Colour pattern influences behaviour and affects survival of organisms through perception of light reflectance. Spectrophotometric methods used to study colour optimise precision and accuracy of reflectance across wavelengths, while multiband photographs are generally used to assess the complexity of colour patterns. Using standardised photographs of sand lizards (Lacerta agilis), we compare how colours characterised using point measurements (using the photographs, but simulating spectrophotometry) on the skin differ from colours estimated by clustering pixels in the photograph of the lizard's body. By taking photographs in the laboratory and in the field, the experimental design included two 2-way comparisons. We compare point vs. colour clustering characterisation and influence of illumination in the laboratory and in the field. We found that point measurements adequately represented the dominant colour of the lizard. Where colour patterning influenced measurement geometry, image analysis outperformed point measurement with respect to stability between technical replicates on the same animal. The greater colour variation derived from point measurements increased further under controlled laboratory illumination. Both methods revealed lateral colour asymmetry in sand lizards, i.e. that colours subtly differed between left and right flank. We conclude that studies assessing the impact of colour on animal ecology and behaviour should utilise hyperspectral imaging, followed by image analysis that encompasses the whole colour pattern.

Návaznosti

90042, velká výzkumná infrastruktura

Název: CESNET II

Citovat

DRAČKOVÁ, Tereza, Radovan SMOLINSKÝ, Zuzana HIADLOVSKÁ, Matej DOLINAY a Natália MARTÍNKOVÁ. Quantifying colour difference in animals with variable patterning. Journal of Vertebrate Biology. 2020, roč. 69, č. 4, s. 1-9. ISSN 2694-7684. Dostupné z: https://dx.doi.org/10.25225/jvb.20029.

@article{1707216,
   author = {Dračková, Tereza and Smolinský, Radovan and Hiadlovská, Zuzana and Dolinay, Matej and Martínková, Natália},
   article_number = {4},
   doi = {http://dx.doi.org/10.25225/jvb.20029},
   keywords = {colouration; Reptilia; image analysis; colour pattern; RGB; CIELAB},
   language = {eng},
   issn = {2694-7684},
   journal = {Journal of Vertebrate Biology},
   title = {Quantifying colour difference in animals with variable patterning},
   url = {https://doi.org/10.25225/jvb.20029},
   volume = {69},
   year = {2020}
}

TY  - JOUR
ID  - 1707216
AU  - Dračková, Tereza - Smolinský, Radovan - Hiadlovská, Zuzana - Dolinay, Matej - Martínková, Natália
PY  - 2020
TI  - Quantifying colour difference in animals with variable patterning
JF  - Journal of Vertebrate Biology
VL  - 69
IS  - 4
SP  - 1-9
EP  - 1-9
SN  - 26947684
KW  - colouration
KW  - Reptilia
KW  - image analysis
KW  - colour pattern
KW  - RGB
KW  - CIELAB
UR  - https://doi.org/10.25225/jvb.20029
L2  - https://doi.org/10.25225/jvb.20029
N2  - Colour pattern influences behaviour and affects survival of organisms through perception of light reflectance. Spectrophotometric methods used to study colour optimise precision and accuracy of reflectance across wavelengths, while multiband photographs are generally used to assess the complexity of colour patterns. Using standardised photographs of sand lizards (Lacerta agilis), we compare how colours characterised using point measurements (using the photographs, but simulating spectrophotometry) on the skin differ from colours estimated by clustering pixels in the photograph of the lizard's body. By taking photographs in the laboratory and in the field, the experimental design included two 2-way comparisons. We compare point vs. colour clustering characterisation and influence of illumination in the laboratory and in the field. We found that point measurements adequately represented the dominant colour of the lizard. Where colour patterning influenced measurement geometry, image analysis outperformed point measurement with respect to stability between technical replicates on the same animal. The greater colour variation derived from point measurements increased further under controlled laboratory illumination. Both methods revealed lateral colour asymmetry in sand lizards, i.e. that colours subtly differed between left and right flank. We conclude that studies assessing the impact of colour on animal ecology and behaviour should utilise hyperspectral imaging, followed by image analysis that encompasses the whole colour pattern.
ER  -

DRAČKOVÁ, Tereza, Radovan SMOLINSKÝ, Zuzana HIADLOVSKÁ, Matej DOLINAY a Natália MARTÍNKOVÁ. Quantifying colour difference in animals with variable patterning. \textit{Journal of Vertebrate Biology}. 2020, roč.~69, č.~4, s.~1-9. ISSN~2694-7684. Dostupné z: https://dx.doi.org/10.25225/jvb.20029.

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