Data

Quantifying colour patterns on the black carapace of the fiddler crab Uca capricornis

Australian Ocean Data Network
Detto, Tanya ; Zeil, Jochen, Dr ; Backwell, Patricia, Dr ; Hemmi, Jan, Dr
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/c5930b70-4ad5-11dc-a790-00188b4c0af8&rft.title=Quantifying colour patterns on the black carapace of the fiddler crab Uca capricornis&rft.identifier=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/c5930b70-4ad5-11dc-a790-00188b4c0af8&rft.description=Fiddler crabs are often spectacularly coloured and capable of dramatic colour changes. While the adaptive significance of variation resulting from short- or long-term colour changes is generally well known, the phenotypic diversity in colour pattern between individuals is often neglected. To fully understand the development and function of colour pattern variation, it is necessary to first describe its morphological basis and the naturally occurring diversity. - NB Colour pattern refers to the configuration of any coloured areas on the black carapace, regardless of their spectral composition. During this experiment 276 fiddler crabs of the species Uca capricornis were photographed - 117 females and 159 males. Using these pictures and a host of software programs, images were constructed that illustrate the probable colour patterns of various groups of crabs, including males and females in general, and males and females with various size classes; 18mm (no photographed females were >18mm). These images are the equivalent of an average crab's colour pattern. To more clearly illustrate the variation in colour pattern between the groups, similar images were constructed using the standard deviation of crabs coloured at each coordinate (1mm x 1mm square).Statement: To quantify the carapace colour patterns of U. capricornis 117 females and 159 males were collected. A digital photograph of their carapace was taken and the crabs were released unharmed. Digital photographs were taken using manual white balance and included a colour standard. We used the manual colour correction function of Paint Shop Pro version 7.02 (Jasc Software 2000) to standardise the colour of the photographs and account for lighting differences. Using a raster-based graphics software [Paint Shop Pro version 7.02 (Jasc Software 2000)] I converted each crab carapace into a stylised black hexagon, with corners at the base of the last pair of legs, the widest points of the carapace, and the base of the eyestalks. We then converted any colour markings on the carapace to white before standardising the size and orientation of the images using ENVI software (Research Systems Colorado) to warp them to a standard carapace 45 mm wide and 25 mm high. Using the public domain Scion Image (Alpha 4.0.3.2) program (Scion Corporation), I measured the total size of the coloured area and the area of the carapace, using the measured carapace width as a scale. We then determined the proportion of the carapace that was coloured and examined its relationship with carapace size and sex using a generalised linear model. The data were tested for normality, and the proportion of the carapace that was coloured was arcsine transformed to conform to the assumptions of normality.Statement: The probable colour patterns of various groups of crabs are shown in the dataset supplied through this record. These images are the equivalent of an average crab's colour pattern. To more clearly illustrate the variation in colour pattern between the groups, similar images were constructed using the standard deviation of crabs coloured at each coordinate (1mm x 1mm square). Also provided are the original photographs of the crabs, and the associated warped image of each individual. These individual photos and warped images are provided in 15 zipped folders. Folders 14 and 15 only contain warped images, as the individual photos are not available. Parameters: Size group (mm), number of carbs in size group, percentage of crabs (%).&rft.creator=Detto, Tanya &rft.creator=Zeil, Jochen, Dr &rft.creator=Backwell, Patricia, Dr &rft.creator=Hemmi, Jan, Dr &rft.date=2007&rft.coverage=130.83298,-12.40969 130.83297,-12.40975 130.83302,-12.40975 130.83303,-12.40970 130.83298,-12.40969&rft.coverage=westlimit=130.5; southlimit=-13; eastlimit=131; northlimit=-12&rft.coverage=westlimit=130.5; southlimit=-13; eastlimit=131; northlimit=-12&rft.coverage=uplimit=0; downlimit=0&rft.coverage=uplimit=0; downlimit=0&rft_rights=Creative Commons Attribution 2.5 Australia License http://creativecommons.org/licenses/by/2.5/au/&rft_rights=The citation in a list of references is: citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data accessed at (add http link).&rft_rights=Users are kindly requested to contact the principal investigator for authorisation before utilising or reproducing any material&rft_rights=Thumbnail may not be reproduced without consent from the principal investigator&rft_subject=biota&rft_subject=28 960036&rft_subject=Uca capricornis&rft_subject=CRUSTACEANS&rft_subject=EARTH SCIENCE&rft_subject=BIOLOGICAL CLASSIFICATION&rft_subject=ANIMALS/INVERTEBRATES&rft_subject=ARTHROPODS&rft_subject=Colour Pattern&rft_subject=Neighbour Recognition&rft_subject=Mate Recognition&rft_subject=Behavioural Ecology&rft_subject=Ocypodidae&rft_subject=Fiddler Crab&rft.type=dataset&rft.language=English Access the data
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The citation in a list of references is: citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data accessed at (add http link).

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Brief description

Fiddler crabs are often spectacularly coloured and capable of dramatic colour changes. While the adaptive significance of variation resulting from short- or long-term colour changes is generally well known, the phenotypic diversity in colour pattern between individuals is often neglected. To fully understand the development and function of colour pattern variation, it is necessary to first describe its morphological basis and the naturally occurring diversity. - NB Colour pattern refers to the configuration of any coloured areas on the black carapace, regardless of their spectral composition. During this experiment 276 fiddler crabs of the species Uca capricornis were photographed - 117 females and 159 males. Using these pictures and a host of software programs, images were constructed that illustrate the probable colour patterns of various groups of crabs, including males and females in general, and males and females with various size classes; <8mm, 8-9.9mm, 10-11.9mm, 12-13.9mm, 14-15.9mm, 16-17.9mm, and males >18mm (no photographed females were >18mm). These images are the equivalent of an average crab's colour pattern. To more clearly illustrate the variation in colour pattern between the groups, similar images were constructed using the standard deviation of crabs coloured at each coordinate (1mm x 1mm square).

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Statement: To quantify the carapace colour patterns of U. capricornis 117 females and 159 males were collected. A digital photograph of their carapace was taken and the crabs were released unharmed. Digital photographs were taken using manual white balance and included a colour standard. We used the manual colour correction function of Paint Shop Pro version 7.02 (Jasc Software 2000) to standardise the colour of the photographs and account for lighting differences. Using a raster-based graphics software [Paint Shop Pro version 7.02 (Jasc Software 2000)] I converted each crab carapace into a stylised black hexagon, with corners at the base of the last pair of legs, the widest points of the carapace, and the base of the eyestalks. We then converted any colour markings on the carapace to white before standardising the size and orientation of the images using ENVI software (Research Systems Colorado) to warp them to a standard carapace 45 mm wide and 25 mm high. Using the public domain Scion Image (Alpha 4.0.3.2) program (Scion Corporation), I measured the total size of the coloured area and the area of the carapace, using the measured carapace width as a scale. We then determined the proportion of the carapace that was coloured and examined its relationship with carapace size and sex using a generalised linear model. The data were tested for normality, and the proportion of the carapace that was coloured was arcsine transformed to conform to the assumptions of normality.
Statement: The probable colour patterns of various groups of crabs are shown in the dataset supplied through this record. These images are the equivalent of an average crab's colour pattern. To more clearly illustrate the variation in colour pattern between the groups, similar images were constructed using the standard deviation of crabs coloured at each coordinate (1mm x 1mm square). Also provided are the original photographs of the crabs, and the associated warped image of each individual. These individual photos and warped images are provided in 15 zipped folders. Folders 14 and 15 only contain warped images, as the individual photos are not available. Parameters: Size group (mm), number of carbs in size group, percentage of crabs (%).

Notes

Credit
Australian Research Council (ARC) Centre for Excellence for Vision Science
Credit
Australian Research Council (ARC) Discovery Grant
Credit
The Centre of Visual Sciences (CVS, The Australian National University)
Credit
The Australian National University PhD Scholarship
Purpose
To quantitatively examine the relationship between colouration, carapace size, and sex. This information was used to construct images illustrating the probable colour patterns of various groups of crabs.

Issued: 15 08 2007

Data time period: 2004-11 to 2005-01

Data time period: 2005-11 to 2006-01

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130.83298,-12.40969 130.83297,-12.40975 130.83302,-12.40975 130.83303,-12.4097 130.83298,-12.40969

130.833,-12.40972

131,-12 131,-13 130.5,-13 130.5,-12 131,-12

130.75,-12.5

text: westlimit=130.5; southlimit=-13; eastlimit=131; northlimit=-12

text: uplimit=0; downlimit=0

Subjects
28 960036 | ANIMALS/INVERTEBRATES | ARTHROPODS | BIOLOGICAL CLASSIFICATION | Behavioural Ecology | Crustaceans | Colour Pattern | EARTH SCIENCE | Fiddler Crab | Mate Recognition | Neighbour Recognition | Ocypodidae | Uca capricornis | biota |

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Other Information
Methodology (Methodology quant.doc)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/c5930b70-4ad5-11dc-a790-00188b4c0af8/attachments/Methodology quant.doc

The probable colour patterns of various size groups of Uca capricornis (quant1.doc)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/c5930b70-4ad5-11dc-a790-00188b4c0af8/attachments/quant1.doc

Variation in the probability that a particular area of the carapace is coloured (standdev.doc)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/c5930b70-4ad5-11dc-a790-00188b4c0af8/attachments/standdev.doc

Zipped folder containing photos of individual crabs and the associated warped image: Folder 1 (zip_1.1.zip)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/c5930b70-4ad5-11dc-a790-00188b4c0af8/attachments/zip_1.1.zip

Zipped folder containing photos of individual crabs and the associated warped image: Folder 2 (zip_1.2.zip)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/c5930b70-4ad5-11dc-a790-00188b4c0af8/attachments/zip_1.2.zip

Zipped folder containing photos of individual crabs and the associated warped image: Folder 3 (zip_2.1.zip)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/c5930b70-4ad5-11dc-a790-00188b4c0af8/attachments/zip_2.1.zip

Zipped folder containing photos of individual crabs and the associated warped image: Folder 4 (zip_2.2.zip)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/c5930b70-4ad5-11dc-a790-00188b4c0af8/attachments/zip_2.2.zip

Zipped folder containing photos of individual crabs and the associated warped image: Folder 5 (zip_2.3.zip)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/c5930b70-4ad5-11dc-a790-00188b4c0af8/attachments/zip_2.3.zip

Zipped folder containing photos of individual crabs and the associated warped image: Folder 6 (zip_3.1.zip)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/c5930b70-4ad5-11dc-a790-00188b4c0af8/attachments/zip_3.1.zip

Zipped folder containing photos of individual crabs and the associated warped image: Folder 7 (zip_3.2.zip)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/c5930b70-4ad5-11dc-a790-00188b4c0af8/attachments/zip_3.2.zip

Zipped folder containing photos of individual crabs and the associated warped image: Folder 8 (zip_3.3.zip)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/c5930b70-4ad5-11dc-a790-00188b4c0af8/attachments/zip_3.3.zip

Zipped folder containing photos of individual crabs and the associated warped image: Folder 9 (zip_3.4.zip)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/c5930b70-4ad5-11dc-a790-00188b4c0af8/attachments/zip_3.4.zip

Zipped folder containing photos of individual crabs and the associated warped image: Folder 10 (zip_4.1.zip)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/c5930b70-4ad5-11dc-a790-00188b4c0af8/attachments/zip_4.1.zip

Zipped folder containing photos of individual crabs and the associated warped image: Folder 11 (zip_4.2.zip)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/c5930b70-4ad5-11dc-a790-00188b4c0af8/attachments/zip_4.2.zip

Zipped folder containing photos of individual crabs and the associated warped image: Folder 12 (zip_4.3.zip)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/c5930b70-4ad5-11dc-a790-00188b4c0af8/attachments/zip_4.3.zip

Zipped folder containing photos of individual crabs and the associated warped image: Folder 13 (zip_5.zip)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/c5930b70-4ad5-11dc-a790-00188b4c0af8/attachments/zip_5.zip

Zipped folder containing photos of individual crabs and the associated warped image: Folder 14 (zip_6.zip)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/c5930b70-4ad5-11dc-a790-00188b4c0af8/attachments/zip_6.zip

Zipped folder containing photos of individual crabs and the associated warped image: Folder 15 (zip_7.zip)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/c5930b70-4ad5-11dc-a790-00188b4c0af8/attachments/zip_7.zip

global : 22244700-4f90-11dc-87ba-00188b4c0af8

Identifiers
  • global : c5930b70-4ad5-11dc-a790-00188b4c0af8
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