IMAS Metadata Catalogue
Biology and population dynamics of redbait and jack mackerel
Sampling of commercial mid-water trawl catches for small pelagics from waters adjacent to Tasmania have yielded an extensive biological dataset in space and time. As a minimum, size composition information is available from most commerical shots undertaken between 2002 and 2006, referenced with operational information (location, depth and catch weight). Subsamples of the key small pelagics, redbait, jack mackerel and blue mackerel, were examined for size, sex, gonad weight and stage and otoliths have been retained for age determination.
Further data has been collected since the initial investigation.
Simple
Identification info
- Date (Creation)
- 2008-08-20T13:23:00
Principal investigator
Tasmanian Aquaculture and Fisheries Institute (TAFI) - Lyle, Jeremy, Dr
Private Bag 49
Hobart
TAS
7001
Australia
- Purpose
- Characterise population structure and inform on fishery impacts.
- Credit
- Fisheries Research and Development Corporation (FRDC): 2004/039
- Credit
- Australian Fisheries Management Authority
- Status
- On going
Principal investigator
Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Lyle, Jeremy, Dr
IMAS - Taroona
Private Bag 49
Hobart
TAS
7001
Australia
- Spatial representation type
- Text, table
- Topic category
-
- Biota
Extent
N
S
E
W
))
Temporal extent
- Time position
- 2002-01-01T00:00:00
- Maintenance and update frequency
- Not planned
Resource format
- Title
- Microsoft Access (mdb)
- Date
- Edition
- 2003
Resource format
- Title
- Microsoft Excel (xls)
- Date
- Edition
- 2003
- Global Change Master Directory Earth Science Keywords v.5.3.8
-
- Agriculture | Agricultural Aquatic Sciences | Fisheries
- Oceans | Marine Biology | Fish
- CAAB - Codes for Australian Aquatic Biota v2.
-
- 37 345001
- Emmelichthys nitidus
- 37 337002
- Trachurus declivis
- 37 441001
- Scomber australasicus
- Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research
- Keywords (Theme)
-
- Size
- Sex
- Gonad weight
- Gonad stage
- Age
Resource constraints
- Classification
- Restricted
Resource constraints
- Use limitation
- The data described in this record are the intellectual property of the University of Tasmania through the Tasmanian Aquaculture and Fisheries Institute.
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
- See point of contact for access to the data.
- Language
- English
- Character encoding
- UTF8
- Supplemental Information
- Report: Ward, T.M., Lyle, J., Keane, J.P., Begg, G., Hobsbawn, P., Ivey, A.R., Sakabe, R. and Steer, M.A (2011). Commonwealth Small Pelagic Fishery: Status Report 2010. Report to Australian Fisheries Management Authority. South Australian Research and Development Institute (Aquatic Sciences), Adelaide. SARDI Publication No. F2010/000270-2. SARDI Research Report Series No. 524. 85pp. Paper: Ewing, GP and Lyle, JM, ‘Reproductive dynamics of redbait, Emmelichthys nitidus (Emmelichthyidae), from south-eastern Australia’, Fisheries Research, 97 (3) pp. 206-215. ISSN 0165-7836 (2009)
Content Information
- Content type
- Physical measurement
- Name
-
Size
- Name
- mm
- Name
-
Sex
- Name
-
Gonad weight
- Name
- Grams
- Name
-
Gonad stage
- Name
-
Age
Distribution Information
- Distribution format
-
-
Microsoft Access (mdb)
-
Microsoft Excel (xls)
-
Microsoft Access (mdb)
Distributor
Resource lineage
- Statement
- Redbait and jack mackerel were sub-sampled from commercial mid-water trawl catches taken on the coastal shelf break off Tasmania, generally in depths of 100–180 m. Fish were collected from both the spawning season and outside of the spawning season. Random samples of at least 100 fish per shot were collected opportunistically from commercial fishing operations between 2003 and 2006. Fish were frozen onboard, later thawed and fork length, total weight, sex, and gonad stage and weight were determined. During the spawing season, in addition to the frozen samples, random samples of at least 30 mature redbait females (≥stage III) from selected trawl shots were retained and either preserved whole (2006) or measured fresh and ovaries preserved (2004 and 2005) in FAACC (10% formalin, 5% glacial acetic acid and 1.3% calcium chloride). Fish that were preserved whole were slit from vent to ventral cradle to assist gonad preservation. Representatives of the immature gonad stages and additional selected females with hydrated oocytes were also preserved in FAACC, the latter to supplement those used for fecundity estimation. These fish were identified separately from those individuals that were sampled randomly. Further methodology specific to work on redbait, can be found in the published paper.
- Hierarchy level
- Dataset
Metadata
- Metadata identifier
-
ad319b70-6e63-11dd-9d1e-00188b4c0af8
- 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/ad319b70-6e63-11dd-9d1e-00188b4c0af8
Point of truth URL of this metadata record
- Date info (Creation)
- 2015-09-03T15:41:19
- Date info (Revision)
- 2015-09-03T15:41:19
Metadata standard
- Title
- ISO 19115-3:2018
Overviews
thumbnail
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available