Data

Laboratory experiment measuring expected drag forces on limpets

Australian Ocean Data Network
King, Alice
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/7a5fb880-cfc6-11dc-97e4-00188b4c0af8&rft.title=Laboratory experiment measuring expected drag forces on limpets&rft.identifier=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/7a5fb880-cfc6-11dc-97e4-00188b4c0af8&rft.description=The expected drag forces that the average sized limpets were exposed to in the high and low intertidal zones at Griffith Point, Victoria were estimated in a continuously circulating flow tank. The flow tank was 1.8m x 20.5cm x 19.5cm and had a maximum velocity of 0.5m/s. To adequately represent the water velocities found in the field, models of limpets that were 16 times the size of the average limpet for both the high and low zones were used. The large model limpets meant that the effects of drag in an effective flow environment of 8m/s could be measured, which were similar to velocities found in the field. Drag forces exerted on models of limpets that were 8 times the size of the shortest and tallest limpets from the high shore and the flattest limpets from the low shore limpets were also estimated.Maintenance and Update Frequency: notPlannedStatement: A strain gauge was mounted vertically above the flow tank and the models were attached upside down on a perspex place that was positioned 3cm below the surface of the water. The strain gauge was connected to a polygraph from which drag measurements were taken. Drag measurements were taken anterior, posterior and in transverse orientations of the limpet model. The drag coefficient (CD) was then calculated using the Vogel (1981) equation: CD = 2d / p S U, where d is the drag force (Newtons), p is the density of the liquid (sea water), S is the cross-sectional area of the object in the direction of flow and U is the velocity squared.&rft.creator=King, Alice &rft.date=1987&rft.coverage=westlimit=145.372; southlimit=-38.539; eastlimit=145.372; northlimit=-38.539&rft.coverage=westlimit=145.372; southlimit=-38.539; eastlimit=145.372; northlimit=-38.539&rft_rights=Contact point of contact for access to data&rft_rights=This metadata may be downloaded for use in accordance with the Copyright Act 1968&rft_subject=biota&rft_subject=POPULATION DYNAMICS&rft_subject=EARTH SCIENCE&rft_subject=BIOSPHERE&rft_subject=ECOLOGICAL DYNAMICS&rft_subject=SPECIES/POPULATION INTERACTIONS&rft_subject=Oceans | Marine Biology | Marine Invertebrates | limpet&rft_subject=Biosphere | Aquatic Habitat | Benthic Habitat | rocky intertidal&rft_subject=COASTAL HABITAT&rft_subject=AQUATIC ECOSYSTEMS&rft_subject=Griffith Point&rft_subject=San Remo&rft_subject=Western Port Bay&rft_subject=Victoria&rft_subject=24 488001&rft_subject=Siphonaria diemenensis&rft.type=dataset&rft.language=English Access the data
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Brief description

The expected drag forces that the average sized limpets were exposed to in the high and low intertidal zones at Griffith Point, Victoria were estimated in a continuously circulating flow tank. The flow tank was 1.8m x 20.5cm x 19.5cm and had a maximum velocity of 0.5m/s. To adequately represent the water velocities found in the field, models of limpets that were 16 times the size of the average limpet for both the high and low zones were used. The large model limpets meant that the effects of drag in an effective flow environment of 8m/s could be measured, which were similar to velocities found in the field. Drag forces exerted on models of limpets that were 8 times the size of the shortest and tallest limpets from the high shore and the flattest limpets from the low shore limpets were also estimated.

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Maintenance and Update Frequency: notPlanned
Statement: A strain gauge was mounted vertically above the flow tank and the models were attached upside down on a perspex place that was positioned 3cm below the surface of the water. The strain gauge was connected to a polygraph from which drag measurements were taken. Drag measurements were taken anterior, posterior and in transverse orientations of the limpet model. The drag coefficient (CD) was then calculated using the Vogel (1981) equation: CD = 2d / p S U, where d is the drag force (Newtons), p is the density of the liquid (sea water), S is the cross-sectional area of the object in the direction of flow and U is the velocity squared.

Notes

Credit
This thesis was carried out under the supervision of Prof Mick Keough.

Issued: 13 11 1987

Data time period: 1987-04 to 1987-10

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145.372,-38.539

145.372,-38.539

text: westlimit=145.372; southlimit=-38.539; eastlimit=145.372; northlimit=-38.539

Subjects
24 488001 | AQUATIC ECOSYSTEMS | BIOSPHERE | Biosphere | Aquatic Habitat | Benthic Habitat | rocky intertidal | Coastal Habitat | EARTH SCIENCE | ECOLOGICAL DYNAMICS | Griffith Point | Oceans | Marine Biology | Marine Invertebrates | limpet | Population Dynamics | SPECIES/POPULATION INTERACTIONS | San Remo | Siphonaria diemenensis | Victoria | Western Port Bay | biota |

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global : 93a57500-9169-11dc-9fb6-00188b4c0af8

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  • global : 7a5fb880-cfc6-11dc-97e4-00188b4c0af8
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