Broadscale effects of marine salmonid aquaculture on macrobenthos and the sediment environment in Tasmania between 1998 and 2003

A comparison was made of sediments and associated macrobenthos at sites sampled within 42 fish farm leases distributed across Tasmania. Several key biotic and abiotic metrics recommended in previous studies for assessing environmental impacts of fish farm waste were investigated.

Simple

Identification info

Date (Creation)
2007-11-09T00:00:00

Principal investigator

Tasmanian Aquaculture and Fisheries Institute (TAFI) - Edgar, Graham, Dr
Private Bag 49
Hobart
TAS
7001
Australia
ORCID ID >

Purpose
This study assessed the efficacy of a variety of physical and biological metrics in discriminating fish farm impacts at different distances from cages, with emphasis on the more distant effects.
Credit
Adam Davey, Aquenal Pty Ltd.
Credit
Colin Shepherd, Marine Farming Branch, Department of Primary Industries and Water
Credit
Aquenal Pty Ltd.
Credit
Tassal Operations Ltd.
Credit
Huon Aquaculture Company Pty Ltd.
Credit
AMD Pty Ltd.
Credit
Dom O.Brien
Credit
Aquatas Pty Ltd.
Status
Completed

Principal investigator

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Edgar, Graham, Dr
IMAS - Taroona
Private Bag 49
Hobart
TAS
7001
Australia
ORCID ID >

Topic category
  • Biota

Extent

N
S
E
W


Temporal extent

Time period
1997-01-01T15:04:00 2004-12-31T15:04:00

Vertical element

Minimum value
7
Maximum value
47
Identifier
EPSG::5715
Name
MSL depth
Maintenance and update frequency
Not planned

Resource format

Title
Microsoft Excel
Date
Edition
2003
Global Change Master Directory Earth Science Keywords v.5.3.8
  • Oceans | Marine Sediments | Sediment Composition
  • Oceans | Marine Sediments | Sediment Grain Size
  • Oceans | Ocean Chemistry | Nitrogen
  • Agriculture | Agricultural Aquatic Sciences | Aquaculture
Global Change Master Directory Earth Science Keywords v.5.3.8
  • Biosphere | Zoology | Crustaceans
  • Biosphere | Zoology | Mollusks
  • Biosphere | Zoology | Echinoderms
Keywords (Taxon)
  • Polychaetes
Keywords (Theme)
  • Environmental monitoring
  • Impact assessment
  • Introduced species
  • Redox
Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research
Keywords (Theme)
  • Total number of individuals per sample
  • Total number of species per sample
  • Particle size
  • Organic matter percentage
  • Redox potential

Resource constraints

Classification
Unclassified

Resource constraints

Use limitation
The data described in this record are the intellectual property of the Tasmanian Department of Primary Industries, Water and Environment.

Resource constraints

Linkage
http://i.creativecommons.org/l/by/2.5/au/88x31.png

License Graphic

Title
Creative Commons Attribution 2.5 Australia License


>

Website
http://creativecommons.org/licenses/by/2.5/au/

License Text

Other constraints
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).
Other constraints
For access to the data please contact the researcher.
Language
English
Character encoding
UTF8
Supplemental Information
Edgar, GJ, Davey, A and Shepherd C. Broadscale effects of marine salmonid aquaculture and introduced pests on macrobenthos and the sediment environment in Tasmania between 1998 and 2003. Tasmanian Aquaculture and Fisheries Institute (TAFI), Internal Report 2009. Edgar, GJ and MacLeod, C and Mawbey, RB and Shields, D, ‘Broad-scale effects of marine salmonid aquaculture on macrobenthos and the sediment environment in southeastern Tasmania’, Journal of Experimental Marine Biology and Ecology, 327 (1) pp. 70-90. ISSN 0022-0981 (2005) Edgar, GJ and Davey, A and Shepherd, C, ‘Application of biotic and abiotic indicators for detecting benthic impacts of marine salmonid farming among coastal regions of Tasmania’, Aquaculture , 307 (3-4) pp. 212-218. ISSN 0044-8486 (2010)

Content Information

Content type
Physical measurement
Name
Total number of individuals per sample

Name
Total number of species per sample

Name
Particle size

Name
Organic matter percentage

Name
Redox potential

Distribution Information

Distribution format
  • Microsoft Excel

Distributor

Principal investigator

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Edgar, Graham, Dr
ORCID ID >

Resource lineage

Statement
Environmental and biological data were obtained in collaboration with, and in some cases by, salmonid farm operators from 42 separate farm lease locations distributed in six regions around Tasmania. Sampling primarily occurred from 1998 to 2003, although two farm leases were sampled in 1997 and a single lease in 2004. Farm leases varied in size and production capacity but were typically 20-60 ha, with 6-20 cages (26-36 m in diameter) stocked per lease. Cages were periodically moved within farm lease areas, with rotation times of 12-36 months. Depths of sites studied ranged from 7 m to 47 m, with mean of 20 m. Triplicate macrofaunal samples were collected < 5 m apart at each site using a Van Veen grab (0.07 m2 surface area) or diver operated corer (150mm diameter) pushed into the sediment to a depth of 100mm. Samples were sieved in the field using a 1 mm mesh sieve, and retained material placed into vials and fixed with 5% buffered formalin. In the laboratory, the collected material was washed through a stacked series of sieves (1, 1.4, 2, 2.8 and 4 mm) using the methods described by Edgar (1990). Material retained on each sieve was sorted, with animals separated into species groups and counted. A Craib corer was used alongside the Van Veen grab at each site to collect triplicate sediment cores (43 mm in diameter) for analysis of sediment properties. Redox potential was measured in millivolts at the surface of the sediment and at 40 mm depth below the sediment surface. After redox measurements were completed, two sub-samples were separated from each Craib core. The top 30 mm of sediment was collected in a vial for analysis of organic content, %C, %N, stable isotope ratios and particle size. The next 70 mm was used for particle size analysis only. The two samples comprising the top 100 mm of each sediment core were combined for particle size analysis.
Hierarchy level
Dataset

Metadata

Metadata identifier
640e0630-8e54-11dc-94b1-00188b4c0af8

Language
English
Character encoding
UTF8

Point of contact

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - IMAS Data Manager

Type of resource

Resource scope
Dataset
Metadata linkage
https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/640e0630-8e54-11dc-94b1-00188b4c0af8

Point of truth URL of this metadata record

Date info (Creation)
2015-09-03T15:50:04
Date info (Revision)
2015-09-03T15:50:04

Metadata standard

Title
ISO 19115-3:2018
 
 

Overviews

Spatial extent

N
S
E
W


Keywords

Environmental monitoring Impact assessment Introduced species Organic matter percentage Particle size Redox Redox potential Total number of individuals per sample Total number of species per sample
Global Change Master Directory Earth Science Keywords v.5.3.8
Agriculture | Agricultural Aquatic Sciences | Aquaculture Oceans | Marine Sediments | Sediment Composition Oceans | Marine Sediments | Sediment Grain Size Oceans | Ocean Chemistry | Nitrogen

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