Data

Colour changes associated with moulting in 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/a23dc120-4ae3-11dc-a790-00188b4c0af8&rft.title=Colour changes associated with moulting in the fiddler crab, Uca capricornis&rft.identifier=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/a23dc120-4ae3-11dc-a790-00188b4c0af8&rft.description=The purpose of the experiment was to quantitatively examine the colour changes associated with moulting in the fiddler crab, Uca capricornis. Experiments were conducted in the East Point Reserve, Darwin between Nov - Jan (04/05 & 05/06). Circular cages were constructed on the mud flat and characteristically marked crabs were introduced. In total 11 females and 10 males were photographed through at least one moult. On average, U. capricornis grow 1.6mm with every moult. With every successive moult the carapace pattern contracts and becomes more distinct, especially in males. In addition to the considerable variation in pattern, both sexes also vary in the specific colour of their spots. Colour changes are associated with moulting and, as with pattern, tend to follow a certain progression.Statement: 5 circular cages were constructed (1m in diameter) out of flyscreen mesh and buried 10cm in the mud within the Uca capricornis population. The cages protruded a further 20cm above the mud and a laminate strip glued around the inner and outer top 5cm prevented crabs from climbing in or out of the cage. All existing crabs were removed from the cages and restocked with 4 crabs; a small male and female and a large male and female. Crabs were measured, and a digital photograph of their carapace was taken. A coloured sequin was superglued to the posterior region of their carapace. Crabs were checked every week - the absence of a sequin indicating a moult - before measuring and remarking them.Statement: Over the 4 months of the experiment several of the crabs disappeared and had to be replaced. A couple of these reappeared, but were distinguishable by their size, colour pattern and the colour of sequin. In total 11 females and 10 males were photographed through at least one moult. Parameters: Crab number, date of moult, carapace size (mm), claw size (mm), claw side, photo number.&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=Thumbnail not to be reproduced without consent from the principal investigator&rft_rights= http://creativecommons.org/licenses/by/2.5/au/&rft_rights=http://i.creativecommons.org/l/by/2.5/au/88x31.png&rft_rights=WWW:LINK-1.0-http--related&rft_rights=License Graphic&rft_rights=Creative Commons Attribution 2.5 Australia License&rft_rights=http://creativecommons.org/international/au/&rft_rights=WWW:LINK-1.0-http--related&rft_rights=WWW:LINK-1.0-http--related&rft_rights=License Text&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 requested to contact the principal investigator for authorisation before utilising or reproducing any material&rft_rights=Creative Commons Attribution 2.5 Australia License http://creativecommons.org/licenses/by/2.5/au&rft_subject=biota&rft_subject=28 960036&rft_subject=CRUSTACEANS&rft_subject=EARTH SCIENCE&rft_subject=BIOLOGICAL CLASSIFICATION&rft_subject=ANIMALS/INVERTEBRATES&rft_subject=ARTHROPODS&rft_subject=Colour Pattern&rft_subject=Moulting&rft_subject=Behavioural Ecology&rft_subject=Ocypodidae&rft_subject=Fiddler Crab&rft_subject=Uca capricornis&rft_subject=crab_code&rft_subject=date&rft_subject=carapace_width&rft_subject=claw_length&rft_subject=claw_side&rft.type=dataset&rft.language=English Access the data
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Brief description

The purpose of the experiment was to quantitatively examine the colour changes associated with moulting in the fiddler crab, Uca capricornis. Experiments were conducted in the East Point Reserve, Darwin between Nov - Jan (04/05 & 05/06). Circular cages were constructed on the mud flat and characteristically marked crabs were introduced. In total 11 females and 10 males were photographed through at least one moult. On average, U. capricornis grow 1.6mm with every moult. With every successive moult the carapace pattern contracts and becomes more distinct, especially in males. In addition to the considerable variation in pattern, both sexes also vary in the specific colour of their spots. Colour changes are associated with moulting and, as with pattern, tend to follow a certain progression.

Lineage

Statement: 5 circular cages were constructed (1m in diameter) out of flyscreen mesh and buried 10cm in the mud within the Uca capricornis population. The cages protruded a further 20cm above the mud and a laminate strip glued around the inner and outer top 5cm prevented crabs from climbing in or out of the cage. All existing crabs were removed from the cages and restocked with 4 crabs; a small male and female and a large male and female. Crabs were measured, and a digital photograph of their carapace was taken. A coloured sequin was superglued to the posterior region of their carapace. Crabs were checked every week - the absence of a sequin indicating a moult - before measuring and remarking them.
Statement: Over the 4 months of the experiment several of the crabs disappeared and had to be replaced. A couple of these reappeared, but were distinguishable by their size, colour pattern and the colour of sequin. In total 11 females and 10 males were photographed through at least one moult. Parameters: Crab number, date of moult, carapace size (mm), claw size (mm), claw side, photo number.

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 colour changes associated with moulting in the fiddler crab, Uca capricornis

Issued: 15 08 2007

Data time period: 2004-11 to 2005-01

Data time period: 2005-11 to 2006-01

This dataset is part of a larger collection

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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 | Moulting | Ocypodidae | Uca capricornis | biota | carapace_width | claw_length | claw_side | crab_code | date |

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Other Information
Before and after moulting images: 11 Females (Female_moult.zip)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/a23dc120-4ae3-11dc-a790-00188b4c0af8/attachments/Female_moult.zip

Before and after moulting images: 10 Males (Male_moult.zip)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/a23dc120-4ae3-11dc-a790-00188b4c0af8/attachments/Male_moult.zip

Carapace and claw sizes before and after moulting (moulting_sizes_amended.xls)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/a23dc120-4ae3-11dc-a790-00188b4c0af8/attachments/moulting_sizes_amended.xls

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

Identifiers
  • global : a23dc120-4ae3-11dc-a790-00188b4c0af8
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