Data

WAMSI Node 4.2.1b - Development and validation of an estuarine health index for the Swan Estuary

Australian Ocean Data Network
Hallet, Chris, Dr (Author) Hallett, Chris, Dr (Point of contact)
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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/566d6d02-1b69-4e9a-974a-ea1615ba8212&rft.title=WAMSI Node 4.2.1b - Development and validation of an estuarine health index for the Swan Estuary&rft.identifier=566d6d02-1b69-4e9a-974a-ea1615ba8212&rft.publisher=Australian Ocean Data Network&rft.description=This project (WAMSI Node 4.2.1b) aimed to develop an index for assessing the health of the Swan Estuary, based on fish assemblage characteristics. The index incorporates a suite of metrics, each of which measures a different aspect of the fish community, e.g. species diversity and composition, use of the Estuary as a nursery habitat, and the trophic structure (the feeding relationships between species) of the estuarine fish community.The study incorporated and utilized historical data from 1977-2004, plus current sampling (2007-2009), to establish reference conditions for multiple fish community metrics, against which the recent, current and future status of the estuary is assessed. Data is available as two Excel spreadsheets: Establishing_reference_and_scoring_seine_Metrics.xls Establishing_reference_and_scoring_gill_Metrics.xls The gill net and seine net files contain, respectively, for each offshore and nearshore historical fish sample collected between 1976 and 2009: (i) the raw values calculated for each of the selected fish metrics comprising the offshore and nearshore health indices; (ii) the corresponding metric scores (i.e. scored in comparison to the appropriate reference conditions I derived for each metric); and (iii) the final health index scores for each historical sample. The historical studies used in the project are all detailed in the final report.Statement: The current sampling regime replicates and builds upon those employed during previous studies (1977-2004), and involves the collation and analysis of fish community data collected seasonally over a two year period, from the Swan Estuary, to enable reference conditions to be established and health indices to be calculated. Fish were collected from nearshore and offshore sites (< 2 m and > 2 m deep, respectively) throughout the Swan Estuary. Nearshore sites were sampled using a 21.5 m or 41.5 m long seine net, and offshore sites using composite sunken gill nets, in the middle month of each season between July 2007 and May 2009. All fish were identified to species and the total number of individuals of each species in each sample was recorded. The numbers of each fish species collected in samples from the previous and current studies were standardised by expressing them as count per 21 m net equivalent (seine net data) or as catch rates per unit time (gill net data). The specific method employed to do this was determined following the completion of a net selectivity study. This investigation employed seine nets of each of the sizes used during the previous studies (21.5, 41.5 and 133 m), in order to evaluate biases inherent among the different sampling regimes, and enable the derivation of conversion factors for standardisation of historical and current data. Sampling for this investigation was completed at 20 sites throughout the estuary during October-November 2008 and April-May 2009.Statement: Sampling of the nearshore and offshore fish communities of the Swan Estuary during the study was carried out usually in the middle month of every season between winter 2007 and autumn 2009. The study involved daytime and nighttime sampling (see above).&rft.creator=Hallet, Chris, Dr&rft.date=2017&rft.coverage=westlimit=115.7; southlimit=-32.1; eastlimit=116; northlimit=-31.9&rft.coverage=westlimit=115.7; southlimit=-32.1; eastlimit=116; northlimit=-31.9&rft_rights=Creative Commons Attribution-Noncommercial-Share Alike 2.5 Australia License http://creativecommons.org/licenses/by-nc-sa/2.5/au/&rft_rights=Funding bodies: Swan River Trust, Department of Water, Department of Fisheries, Murdoch University. WAMSI top-up PhD scholarship&rft_rights=*All users must acknowledge the source of the material with the acknowledgment*: Data sourced from Western Australian Marine Science Institution (WAMSI) project funded by Western Australian State Government and research partners and carried out by <insert authors> from <insert organisations>&rft_rights=*Suggested attribution for use in citation*: [author(s)], Western Australian Marine Science Institution (WAMSI), [author organisation(s)], [year-of-data-download], [title], [data-access-URL], data accessed (YYYY-MM-DD).&rft_rights=*Disclaimer*: WAMSI and its Partners data, products and services are provided as is and WAMSI and its Partners do not warrant their fitness for a particular purpose. WAMSI and its Partners have made every reasonable effort to ensure high quality of the data, products and services, to the extent permitted by law the data, products and services are provided without any warranties of any kind, either expressed or implied, including without limitation any implied warranties of title, merchantability, and fitness for a particular purpose or non-infringement. WAMSI and its Partners make no representation or warranty that the data, products and services are accurate, complete, reliable or current. To the extent permitted by law, WAMSI and its Partners exclude all liability to any person arising directly or indirectly from the use of the data, products and services.&rft_subject=biota&rft_subject=environment&rft_subject=ESTUARINE 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=COMMUNITY STRUCTURE&rft_subject=ECOLOGICAL DYNAMICS&rft_subject=COMMUNITY DYNAMICS&rft_subject=Marine Features (Australia) | Swan Estuary, WA&rft_subject=season&rft_subject=sampling_location&rft_subject=sampling_description&rft_subject=historical_sampling_location&rft_subject=sampling_method&rft.type=dataset&rft.language=English Access the data
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Creative Commons Attribution-Noncommercial-Share Alike 2.5 Australia License
http://creativecommons.org/licenses/by-nc-sa/2.5/au/

Funding bodies: Swan River Trust, Department of Water, Department of Fisheries, Murdoch University. WAMSI top-up PhD scholarship

*All users must acknowledge the source of the material with the acknowledgment*: "Data sourced from Western Australian Marine Science Institution (WAMSI) project funded by Western Australian State Government and research partners and carried out by from "

*Suggested attribution for use in citation*:
"[author(s)], Western Australian Marine Science Institution (WAMSI), [author organisation(s)], [year-of-data-download], [title], [data-access-URL], data accessed (YYYY-MM-DD)".

*Disclaimer*:
WAMSI and its Partners data, products and services are provided "as is" and WAMSI and its Partners do not warrant their fitness for a particular purpose. WAMSI and its Partners have made every reasonable effort to ensure high quality of the data, products and services, to the extent permitted by law the data, products and services are provided without any warranties of any kind, either expressed or implied, including without limitation any implied warranties of title, merchantability, and fitness for a particular purpose or non-infringement. WAMSI and its Partners make no representation or warranty that the data, products and services are accurate, complete, reliable or current. To the extent permitted by law, WAMSI and its Partners exclude all liability to any person arising directly or indirectly from the use of the data, products and services.

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Brief description

This project (WAMSI Node 4.2.1b) aimed to develop an index for assessing the health of the Swan Estuary, based on fish assemblage characteristics. The index incorporates a suite of metrics, each of which measures a different aspect of the fish community, e.g. species diversity and composition, use of the Estuary as a nursery habitat, and the trophic structure (the feeding relationships between species) of the estuarine fish community.The study incorporated and utilized historical data from 1977-2004, plus current sampling (2007-2009), to establish reference conditions for multiple fish community metrics, against which the recent, current and future status of the estuary is assessed. Data is available as two Excel spreadsheets: Establishing_reference_and_scoring_seine_Metrics.xls Establishing_reference_and_scoring_gill_Metrics.xls The gill net and seine net files contain, respectively, for each offshore and nearshore historical fish sample collected between 1976 and 2009: (i) the raw values calculated for each of the selected fish metrics comprising the offshore and nearshore health indices; (ii) the corresponding metric scores (i.e. scored in comparison to the appropriate reference conditions I derived for each metric); and (iii) the final health index scores for each historical sample. The historical studies used in the project are all detailed in the final report.

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Statement: The current sampling regime replicates and builds upon those employed during previous studies (1977-2004), and involves the collation and analysis of fish community data collected seasonally over a two year period, from the Swan Estuary, to enable reference conditions to be established and health indices to be calculated. Fish were collected from nearshore and offshore sites (< 2 m and > 2 m deep, respectively) throughout the Swan Estuary. Nearshore sites were sampled using a 21.5 m or 41.5 m long seine net, and offshore sites using composite sunken gill nets, in the middle month of each season between July 2007 and May 2009. All fish were identified to species and the total number of individuals of each species in each sample was recorded. The numbers of each fish species collected in samples from the previous and current studies were standardised by expressing them as count per 21 m net equivalent (seine net data) or as catch rates per unit time (gill net data). The specific method employed to do this was determined following the completion of a net selectivity study. This investigation employed seine nets of each of the sizes used during the previous studies (21.5, 41.5 and 133 m), in order to evaluate biases inherent among the different sampling regimes, and enable the derivation of conversion factors for standardisation of historical and current data. Sampling for this investigation was completed at 20 sites throughout the estuary during October-November 2008 and April-May 2009.
Statement: Sampling of the nearshore and offshore fish communities of the Swan Estuary during the study was carried out usually in the middle month of every season between winter 2007 and autumn 2009. The study involved daytime and nighttime sampling (see above).

Notes

Credit
Funding came from Swan River Trust, Department of Water, Department of Fisheries, Murdoch University, WAMSI top-up PhD scholarship - For access to data contact Murdoch University.
Credit
Fiona Valesini (Supervisor)
Credit
Steeg Hoeksema (Supervisor)
Credit
Ian Potter (Supervisor): Centre for Fish and Fisheries Research

Modified: 11 07 2011

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116,-31.9 116,-32.1 115.7,-32.1 115.7,-31.9 116,-31.9

115.85,-32

text: westlimit=115.7; southlimit=-32.1; eastlimit=116; northlimit=-31.9

Subjects
ANIMALS/VERTEBRATES | AQUATIC ECOSYSTEMS | BIOLOGICAL CLASSIFICATION | BIOSPHERE | COMMUNITY DYNAMICS | Community Structure | EARTH SCIENCE | ECOLOGICAL DYNAMICS | Estuarine Habitat | Fish | Marine Features (Australia) | Swan Estuary, WA | biota | environment | historical_sampling_location | sampling_description | sampling_location | sampling_method | season |

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Other Information
(Explantory_table_columns_seine_net.xls)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/566d6d02-1b69-4e9a-974a-ea1615ba8212/attachments/Explantory_table_columns_seine_net.xls

(Establishing_reference_and_scoring_seine_Metrics.xls)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/566d6d02-1b69-4e9a-974a-ea1615ba8212/attachments/Establishing_reference_and_scoring_seine_Metrics.xls

(Explantory_table_columns_gill_net.xls)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/566d6d02-1b69-4e9a-974a-ea1615ba8212/attachments/Explantory_table_columns_gill_net.xls

(Establishing_reference_and_scoring_gill_Metrics.xls)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/566d6d02-1b69-4e9a-974a-ea1615ba8212/attachments/Establishing_reference_and_scoring_gill_Metrics.xls

Identifiers
  • global : 566d6d02-1b69-4e9a-974a-ea1615ba8212