Data

The epibenthic fauna of seagrass beds and bare sand in Princess Royal Harbour and King George Sound, Albany, south-western Australia

Australian Ocean Data Network
Kirkman, Hugh, Dr ; Humphries, Paul, Dr ; Manning, Rob, 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=http://catalogue-aodn.prod.aodn.org.au/geonetwork/srv/eng/search?uuid=5a3addb0-e348-11dc-97b4-00188b4c0af8&rft.title=The epibenthic fauna of seagrass beds and bare sand in Princess Royal Harbour and King George Sound, Albany, south-western Australia&rft.identifier=http://catalogue-aodn.prod.aodn.org.au/geonetwork/srv/eng/search?uuid=5a3addb0-e348-11dc-97b4-00188b4c0af8&rft.description=A short-term sampling programme in Princess Royal Harbour aimed to compare the mobile macrofauna of a shallow eutrophic seagrass habitat (Posidonia australis) with an adjacent sand habitat. In addition, the mobile macrofauna of an apparently oligotrophic seagrass habitat (Posidonia sinuosa) in King George Sound with an adjacent sand habitat. Species diversity and abundance of fish, macro-crustaceans and molluscs among habitats were also investigated. This sampling was carried out on series of nights between 15th and 25th January 1988.The macrofauna of adjacent seagrass and bare sand habitats were sampled in Princess Royal Harbour and King George Sound, Albany on six nights in January 1988. Trawling was carried out as close as possible to high tide on 15, 18, 20, 22, 24 and 25 January 1988 (full moon was 19 January). A roller beam trawl, 1 m wide, 0.5 m deep and with panels of mesh size 3 mm and a cod end of mesh size 1 mm was used. The net was towed three times at each site at approximately 0.04 ms-1 between two markers set 50 m apart. Thus the fauna from an area of 50 m2 was sampled with each trawl and a total of 18 trawls carried out per habitat. The total time taken to complete the 12 trawls each night was 45-60 mins. Posidonia australis meadows at 1 m depth in Princess Royal Harbour and P. sinuosa meadows at 5 m depth in King George Sound were sampled (see thumbnail). It was not possible to sample the same species of seagrass in the two locations as the heavy epiphytic algae on P. sinuosa in Princess Royal Harbour at 5 m depth filled the trawl net on commencement of towing. Therefore, trawls were made in a shallow eutrophic P. australis habitat in Princess Royal Harbour (PRHS), in an adjacent bare sand habitat in Princess Royal Harbour (PRHB) and at a deeper oligotrophic P. sinuosa habitat in King George Sound (KGSS) and in an adjacent bare sand habitat in King George Sound (KGSB). The seagrass and bare sand habitats were approximately 10 m from each other at both locations and at similar depths to their adjacent seagrass habitats. From historic aerial photographs and personal observations the bare sand sites had not supported seagrass in the recent past. After each trawl, samples were placed in bags, sorted and preserved in 70% ethanol. Fish, macrocrustaceans and molluscs were identified (usually) to species and counted.&rft.creator=Kirkman, Hugh, Dr &rft.creator=Humphries, Paul, Dr &rft.creator=Manning, Rob, Dr &rft.date=2008&rft.coverage=northlimit=-35.03; southlimit=-35.06; westlimit=117.9; eastLimit=117.93&rft.coverage=northlimit=-35.03; southlimit=-35.06; westlimit=117.9; eastLimit=117.93&rft_subject=oceans&rft_subject=biota&rft_subject=Oceans | Marine Biology | Marine Plants&rft_subject=BENTHIC HABITAT&rft_subject=EARTH SCIENCE&rft_subject=BIOSPHERE&rft_subject=AQUATIC ECOSYSTEMS&rft_subject=FISH&rft_subject=BIOLOGICAL CLASSIFICATION&rft_subject=ANIMALS/VERTEBRATES&rft_subject=MOLLUSKS&rft_subject=ANIMALS/INVERTEBRATES&rft_subject=CRUSTACEANS&rft_subject=ARTHROPODS&rft_subject=Posidonia sinuosa&rft_subject=63 617003&rft_subject=Posidonia australis&rft_subject=63 617002&rft.type=dataset&rft.language=English Access the data

Brief description

A short-term sampling programme in Princess Royal Harbour aimed to compare the mobile macrofauna of a shallow eutrophic seagrass habitat (Posidonia australis) with an adjacent sand habitat. In addition, the mobile macrofauna of an apparently oligotrophic seagrass habitat (Posidonia sinuosa) in King George Sound with an adjacent sand habitat. Species diversity and abundance of fish, macro-crustaceans and molluscs among habitats were also investigated. This sampling was carried out on series of nights between 15th and 25th January 1988.

Lineage

The macrofauna of adjacent seagrass and bare sand habitats were sampled in Princess Royal Harbour and King George Sound, Albany on six nights in January 1988. Trawling was carried out as close as possible to high tide on 15, 18, 20, 22, 24 and 25 January 1988 (full moon was 19 January). A roller beam trawl, 1 m wide, 0.5 m deep and with panels of mesh size 3 mm and a cod end of mesh size 1 mm was used. The net was towed three times at each site at approximately 0.04 ms-1 between two markers set 50 m apart. Thus the fauna from an area of 50 m2 was sampled with each trawl and a total of 18 trawls carried out per habitat. The total time taken to complete the 12 trawls each night was 45-60 mins.

Posidonia australis meadows at 1 m depth in Princess Royal Harbour and P. sinuosa meadows at 5 m depth in King George Sound were sampled (see thumbnail). It was not possible to sample the same species of seagrass in the two locations as the heavy epiphytic algae on P. sinuosa in Princess Royal Harbour at 5 m depth filled the trawl net on commencement of towing. Therefore, trawls were made in a shallow eutrophic P. australis habitat in Princess Royal Harbour (PRHS), in an adjacent bare sand habitat in Princess Royal Harbour (PRHB) and at a deeper oligotrophic P. sinuosa habitat in King George Sound (KGSS) and in an adjacent bare sand habitat in King George Sound (KGSB). The seagrass and bare sand habitats were approximately 10 m from each other at both locations and at similar depths to their adjacent seagrass habitats. From historic aerial photographs and personal observations the bare sand sites had not supported seagrass in the recent past.

After each trawl, samples were placed in bags, sorted and preserved in 70% ethanol. Fish, macrocrustaceans and molluscs were identified (usually) to species and counted.

Created: 25 02 2008

Data time period: 1988-01-15 to 1988-01-25

117.93,-35.03 117.93,-35.06 117.9,-35.06 117.9,-35.03 117.93,-35.03

117.915,-35.045

text: northlimit=-35.03; southlimit=-35.06; westlimit=117.9; eastLimit=117.93

Identifiers
  • global : 5a3addb0-e348-11dc-97b4-00188b4c0af8