Data

Native spider crab predation on Asterias amurensis

University of Tasmania, Australia
Ling, Scott ; Johnson, Craig, Prof.
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://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/be121a6e-e538-4562-9890-84eeb0a69ce2&rft.title=Native spider crab predation on Asterias amurensis&rft.identifier=https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/be121a6e-e538-4562-9890-84eeb0a69ce2&rft.description=This study reports on previously undescribed predation on Asterias amurensis in the Derwent Estuary, Tasmania by the spider crab Leptomithrax gaimardii (Milne Edwards). Specifically, this study describes the predatory interaction between the spider crab and A. amurensis and quantifies patterns of sub-lethal injuries inflicted on the seastar during a localised aggregation of the spider crab.Maintenance and Update Frequency: notPlannedStatement: In mid-July 1999, a large and sustained aggregation of spider crabs (Leptomithrax gaimardii) occurred in the Derwent Estuary adjacent to the Bellerive Yacht Club (BYC). Near the peak of the aggregation, predator-prey interactions and the incidence of sub-lethal damage to A. amurensis was assessed in situ by divers. Rates of sub-lethal damage were estimated by examining all seastars along 6 belt transects, each 10 x 2 m. Each seastar encountered was assessed for damage which was categorised as either full arm loss (entire arm missing from base of central disc), half arm loss (~50% arm missing by length), or arm tip damage (observed as a ~2-5 mm excision of the distal region of the arm). Evidence of wound regeneration was also recorded. In addition to the survey at BYC, the frequency of seastar damage was also assessed from fortnightly collections of 30 individuals from BYC and an additional 6 sites (in the Derwent Estuary) from late July until ~October depending on site. For each seastar collected, ray length (oral opening to distal end of longest arm) was measured with knife edge callipers to the nearest mm. Prior to diver collections at each site, the density of A. amurensis and L. gaimardii was obtained on each sampling occasion by averaging counts across 6 belt transects (each 10 x 2 m at BYC, DSS and Port of Hobart; 30 x 2 m for Nutgrove Beach, Second Bluff and Tranmere).&rft.creator=Ling, Scott &rft.creator=Johnson, Craig, Prof. &rft.date=2011&rft.coverage=westlimit=147.5; southlimit=-43.5; eastlimit=148.0; northlimit=-42.5&rft.coverage=westlimit=147.5; southlimit=-43.5; eastlimit=148.0; northlimit=-42.5&rft.coverage=uplimit=27; downlimit=3&rft.coverage=uplimit=27; downlimit=3&rft_rights=Creative Commons Attribution-Share Alike 2.5 Australia License http://creativecommons.org/licenses/by-sa/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=Contact the researcher for access to data. Data will not be made available until published.&rft_rights=The data described in this record are the intellectual property of S. Ling.&rft_subject=biota&rft_subject=ECHINODERMS&rft_subject=EARTH SCIENCE&rft_subject=BIOLOGICAL CLASSIFICATION&rft_subject=ANIMALS/INVERTEBRATES&rft_subject=CRUSTACEANS&rft_subject=ARTHROPODS&rft_subject=MARINE HABITAT&rft_subject=BIOSPHERE&rft_subject=AQUATIC ECOSYSTEMS&rft_subject=Biosphere | Ecological Dynamics | Competition&rft_subject=Biosphere | Ecological Dynamics | Predation&rft_subject=25 154001&rft_subject=Asterias amurensis&rft_subject=28 880010&rft_subject=Leptomithrax gaimardii&rft_subject=Marine and Estuarine Ecology (incl. Marine Ichthyology)&rft_subject=BIOLOGICAL SCIENCES&rft_subject=ECOLOGY&rft_subject=Aquatic Ecosystem Studies and Stock Assessment&rft_subject=AGRICULTURAL AND VETERINARY SCIENCES&rft_subject=FISHERIES SCIENCES&rft_subject=Density&rft_subject=Sub-lethal damage incidence&rft_subject=Pattern of sub-lethal damage&rft_subject=Rate of wound regeneration&rft_subject=Ray length - seastar&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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Full description

This study reports on previously undescribed predation on Asterias amurensis in the Derwent Estuary, Tasmania by the spider crab Leptomithrax gaimardii (Milne Edwards). Specifically, this study describes the predatory interaction between the spider crab and A. amurensis and quantifies patterns of sub-lethal injuries inflicted on the seastar during a localised aggregation of the spider crab.

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Maintenance and Update Frequency: notPlanned
Statement: In mid-July 1999, a large and sustained aggregation of spider crabs (Leptomithrax gaimardii) occurred in the Derwent Estuary adjacent to the Bellerive Yacht Club (BYC). Near the peak of the aggregation, predator-prey interactions and the incidence of sub-lethal damage to A. amurensis was assessed in situ by divers. Rates of sub-lethal damage were estimated by examining all seastars along 6 belt transects, each 10 x 2 m. Each seastar encountered was assessed for damage which was categorised as either full arm loss (entire arm missing from base of central disc), half arm loss (~50% arm missing by length), or arm tip damage (observed as a ~2-5 mm excision of the distal region of the arm). Evidence of wound regeneration was also recorded. In addition to the survey at BYC, the frequency of seastar damage was also assessed from fortnightly collections of 30 individuals from BYC and an additional 6 sites (in the Derwent Estuary) from late July until ~October depending on site. For each seastar collected, ray length (oral opening to distal end of longest arm) was measured with knife edge callipers to the nearest mm. Prior to diver collections at each site, the density of A. amurensis and L. gaimardii was obtained on each sampling occasion by averaging counts across 6 belt transects (each 10 x 2 m at BYC, DSS and Port of Hobart; 30 x 2 m for Nutgrove Beach, Second Bluff and Tranmere).

Notes

Purpose
Documentation of in situ predation on the introduced seastar outside of its native northern hemisphere range.

Created: 14 09 2011

Data time period: 07 1999 to 31 10 2000

This dataset is part of a larger collection

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148,-42.5 148,-43.5 147.5,-43.5 147.5,-42.5 148,-42.5

147.75,-43

text: westlimit=147.5; southlimit=-43.5; eastlimit=148.0; northlimit=-42.5

text: uplimit=27; downlimit=3

Subjects
25 154001 | 28 880010 | Agricultural and Veterinary Sciences | ANIMALS/INVERTEBRATES | AQUATIC ECOSYSTEMS | ARTHROPODS | Aquatic Ecosystem Studies and Stock Assessment | Asterias amurensis | BIOLOGICAL CLASSIFICATION | Biological Sciences | BIOSPHERE | Biosphere | Ecological Dynamics | Competition | Biosphere | Ecological Dynamics | Predation | Crustaceans | Density | EARTH SCIENCE | Echinoderms | Ecology | Fisheries Sciences | Leptomithrax gaimardii | Marine Habitat | Marine and Estuarine Ecology (Incl. Marine Ichthyology) | Pattern of sub-lethal damage | Rate of wound regeneration | Ray length - seastar | Sub-lethal damage incidence | biota |

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  • global : be121a6e-e538-4562-9890-84eeb0a69ce2