TemperateReefBase Geonetwork Catalogue
Zooplankton and hydrology of inshore coastal waters of South-Eastern Tasmania 1971-1972
Zooplankton samples were collected at inshore coastal waters of south eastern Tasmania, between the years 1971 and 1972. Three stations were selected to cover the D'Entrecasteaux Channel, mouth of the Derwent River and the Storm Bay areas. Surface, midwater and bottom zooplankton samples were collected monthly for a period of twelve months during the day as well as night time, using horizontal tows. Data for temperature and salinity were also obtained from the stations.
Simple
Identification info
- Date (Creation)
- 2011-11-04T08:00:00
Principal investigator
School of Zoology, University of Tasmania (UTAS) - Taw, Nyan (PhD student)
Private Bag 5
Hobart
TAS
7001
Australia
- Purpose
- The purpose of this study was to obtain data on an important part of the marine ecosystem, that was confronted with industrial waste discharge and domestic sewage, that was in need of further thorough investigation.
- Status
- Completed
Custodian
Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Swadling, Kerrie, Dr (Research Fellow)
IMAS - Taroona
Private Bag 49
Hobart
TAS
7001
Australia
- Topic category
-
- Biota
Extent
N
S
E
W
))
Temporal extent
- Time period
- 1971-08-19T10:15:00 1972-07-25T10:15:00
Vertical element
- Minimum value
- 0
- Maximum value
- 20
- Identifier
- EPSG::5715
- Name
- MSL depth
- Maintenance and update frequency
- Not planned
Resource format
- Title
- Scanned data from thesis (pdf)
- Date
- Edition
- -
- Global Change Master Directory (GCMD) Earth Science Keywords Version 8.0
- Keywords (Discipline)
-
- Temperate Reef
- Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research
- AODN Discovery Parameter Vocabulary
- Keywords (Theme)
-
- Zooplankton biomass
Resource constraints
- Classification
- Unclassified
Resource constraints
- Use limitation
- The data described in this record are the intellectual property of N. Taw.
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).
Associated resource
- Title
- Zooplanktonic communities of south east Tasmania
- Date (Creation)
- 2011-10-14T00:00:00
- Language
- English
- Character encoding
- UTF8
- Supplemental Information
- Taw, N. (1975)Studies on the zooplankton and hydrology of South-Eastern coastal waters of Tasmania. PhD thesis, University of Tasmania Taw, N. (1975). Relative composition of zooplankton groups as an indication of water movement in the inshore coastal waters of South-Eastern Tasmania. Search. 6(11-12): 514-516. Johnson, CR and Banks, SC and Barrett, NS and Cazassus, FM and Dunstan, PK and Edgar, GJ and Frusher, SD and Gardner, C and Haddon, M and Helidoniotis, F and Hill, KL and Holbrook, NJ and Hosie, GW and Last, PR and Ling, SD and Melbourne-Thomas, J and Miller, KJ and Pecl, GT and Richardson, AJ and Ridgway, KR and Rintoul, SR and Ritz, DA and Ross, DJ and Sanderson, JC and Shepherd, SA and Slotwinski, A and Swadling, KM and Taw, N, Climate change cascades: Shifts in oceanography, species' range and subtidal marine community dynamics in eastern Tasmania, Journal of Experimental Marine Biology and Ecology, 400, (1-2) pp. 17-32. ISSN 0022-0981 (2011)
Content Information
- Content type
- Physical measurement
Identifier
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UPAA
- Name
- Degrees Celsius
Identifier
- Identifier
- http://vocab.aodn.org.au/def/unitsofmeasure/entity/481
- Name
- Practical Salinity Unit
- Name
- Zooplankton biomass
- Name
- ml/100m3
Identifier
- Code
- Abundance of biota
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UPMM
- Name
- Number per cubic metre
Distribution Information
- Distribution format
-
- Scanned data from thesis (pdf)
- OnLine resource
- DATA ACCESS - appendix from thesis, scanned into a pdf. Data relevant to this record, refer pages: 18-70. [direct download]
- OnLine resource
-
imas:ZOO_KMSwadling_Zooplankton_hydrology_inshore_coastal_waters_tasmania_GV
MAP - Location of zooplankton sampling stations
Resource lineage
- Statement
- Samples were collected from three stations, selected to cover the D'Entrecasteaux Channel, mouth of the Derwent River and the Storm Bay area. A simple net with a mouth area of 0.25m2 and 200um mesh size, having a throttle with Nansen closing system was used (Fraser, 1966). A flow metre of the type Tsurumi-Seiki Kosakusho was fitted with three points on the ring and centred 14.25c from the rim which weighed 6.5 kg. Later, some modifications were made on the net and now known as WP-2 net (UNESCO, 1968). Since the sampling depth in the present study was shallow, horizontal tows were made in the zooplankton collections without the lead weight recommended for vertical tows. The flow metre was calibrated afte each third field trip. The Zoology Department Research Vessel, "Neotrigonia" was used for the field collection trips. Surface horizontal tows were made with the vessel's speed approximately 1.5 to 2.0 knots. To obtain a sample at a required depth the net was lowered with the rim in the vertical position while the vessel was in motion at approximately 0.5 knots. On reaching the required depth the cable was locked and the speed of the vessel increased to 1.5 to 2.0 knots. The net was towed horizontally against tidal currents if any. The angle of the cable was maintained at approximately 35o. For mid-water samples, 10 - 15 metres, and for bottom samples, 20 - 25 metres of cable was released, depending on the depth of the sampling area. This was to sample zooplankton from the depths of between 5 - 10m and 15 - 20m respectively. The maximum time elapsed for each tow was about three minutes. A messenger was used to close the net. The net was open while it was lowered and would fish on the way to the required depth. However, the volume of the water passing through the net at this stage would be low. Since the volume of water filtered wsa usually about 35 cubic meters and the maximum depth sampled was 20m, this accidental contamination would be negligable. The net was washed after each sampling. The zooplankton sample was preserved in approximately 5% formalin immediately after each collection. Sub-sampling was carried out by the Modified Whirling Apparatus, and counting was done by using the modified counting disc and apparatus (as described in the thesis). Biomass determination - The wet displacement volume of formalin preserved zooplankton samples were measure by the mercury immersion method (Yentsch & Hebard, 1957). Before measuring the volume of large non-crustacean zooplankton - Salps, Coelenterates, Ctenophores, Chaetognaths and Annelid worms - were removed. Zooplankton was sampled once a month, at three depths - surface, midwater (approximately 10 meters) and bottom (approximately 20 meters) during the day and another three samples at night at each station. The night sampling were operated about half an hour after sunset. Due to weather conditions, it was not always possible to obtain the day and night samples on the same day or commence from the same stations. A collection was missed at Station IC3 and only day time sampling was made at Stations IC1 and IC2 in February due to engine trouble in the vessel. Temperature - A thermometer marked in 0.5oC was used to measure the temperature until Jan 1972. From February onwards, a thermometer marked 0.1oC was used. Sub-surface water temperature was measured from the water sample bought to the surface by the Nansen Reversing bottle. Salinity - A Nansen Reversing bottle was used to collect sub-surface water samples. The wate samples were collected immediately after the plankton sampling and were stored in screw tight narrow necked unbreakable polyethylene bottles. From August to November 1971, salinity was determined by titrating 10ml of sea water against 27.25g'L of silver nitrate using flouresein blue as an indicator (Harvey, 1955). The Copenhagen Standard sea water was used for calibration. From the December collection onward, the Inductive Salinometer was used to determine the salinity. The apparatus was calibrated before each batch of determinations, using Copenhagen Standard sea water. The Inductive Salinometer has an accuracy of approximately 0.003 parts per milli.
- Hierarchy level
- Dataset
Metadata
- Metadata identifier
- 6f29a408-43ad-464c-8282-4244cf6aaf14
- Language
- English
- Character encoding
- UTF8
Point of contact
Type of resource
- Resource scope
- Dataset
- Metadata linkage
-
https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/6f29a408-43ad-464c-8282-4244cf6aaf14
Point of truth URL of this metadata record
- Date info (Creation)
- 2020-09-17T17:41:00
- Date info (Revision)
- 2020-09-17T17:41:00
Metadata standard
- Title
- ISO 19115-3:2018
Overviews
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available