IMAS Metadata Catalogue
Application of the daily egg production method for redbait - adult reproductive parameters
Adult reproductive data for redbait is based on collections taken by midwater trawling during the spawning season and includes the biological information - size, sex, reproductive condition (weight and stage).
Histological examination of mature ovaries provides information on spawing activity and preserved gonads are examined to determine batch fecundity.
Simple
Identification info
- Date (Creation)
- 2007-07-03T14:29:00
Principal investigator
Tasmanian Aquaculture and Fisheries Institute (TAFI) - Lyle, Jeremy, Dr
Private Bag 49
Hobart
TAS
7001
Australia
- Purpose
- Determine feasibility of using the daily egg production method to determine spawning biomass of redbait off Tasmania.
- Credit
- Fisheries Research and Development Corporation (FRDC): 2004/039
- 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
- 2004-01-01T00:00:00
Vertical element
- Minimum value
- 60
- Maximum value
- 200
- Identifier
- EPSG::5715
- Name
- MSL depth
- Maintenance and update frequency
- Irregular
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
-
- Oceans | Marine Biology | Fish
- CAAB - Codes for Australian Aquatic Biota v2.
-
- 37 345001
- Emmelichthys nitidus
- Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research
- Keywords (Theme)
-
- Size
- Sex
- Gonad stage
- Gonad weight
- 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
- Environment description
- Uni_file_Id: TAS_JL_20070703_936
- Supplemental Information
- Report: Neira, FJ and Lyle, JM and Ewing, G and Keane, JP and Tracey, S, Evaluation of egg production as a method of estimating spawning biomass of redbait off the east coast of Tasmania, Fisheries Research and Development Corporation, Project 2004/039 (2008). Papers: Neira, FJ and Lyle, JM, ‘DEPM-based spawning biomass of Emmelichthys nitidus (Emmelichthyidae) to underpin a developing mid-water trawl fishery in south-eastern Australia’, Fisheries Research: An International Journal on Fishing Technology, Fisheries Science and Fisheries Management, 110 (2011) pp. 236-243. ISSN 0165-7836 (2011) 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) [Refereed Article]
Content Information
- Content type
- Physical measurement
- Name
- Size
- Name
- mm
- Name
- Sex
- Name
- Gonad stage
- Name
- Gonad weight
- Name
- Grams
- Name
- Age
Distribution Information
- Distribution format
-
- Microsoft Access (mdb)
- Microsoft Excel (xls)
Distributor
Resource lineage
- Statement
- Redbait were sub-sampled from mid-water trawl catches taken by the commercial fishing vessel Ellidi off the Tasmanian shelf break, mostly in depths of 100 to 180 m. Adult sampling for the DEPM was paired with plankton sampling in eastern Tasmania in October 2005, and eastern and south-western Tasmania in October 2006. Opportunistic supplementary sampling of commercial fishing operations was conducted during the spawning seasons of 2004, 2005, 2006 and 2007 (September to November inclusive) off eastern and south-western Tasmania. A random sample of between 100 and 200 fish was frozen from each shot for later examination. These fish were thawed and fork length (FL, ± 1mm), total weight (± 1g), sex, gonad stage and weight (± 0.1g) were recorded. During 2004 and 2005, length and gonad stage were recorded from a further random sample of around 30 females from every shot. The gonads from these fish were removed and preserved in FAACC (10% formalin, 5% glacial acetic acid and 1.3% calcium chloride). During 2006, a random sample of at least 30 mature females was collected from each shot and preserved whole in FAACC (with a slit from vent to ventral cradle to assist preservation). Additional females with hydrated oocytes were also preserved in FAACC but these fish were kept separate from the random samples and used to supplement samples used for fecundity estimation. For further information on methodology, please consult the FRDC report.
- Hierarchy level
- Dataset
Metadata
- Metadata identifier
- 853f16c0-44a1-11dc-8cd0-00188b4c0af8
- 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/853f16c0-44a1-11dc-8cd0-00188b4c0af8
Point of truth URL of this metadata record
- Date info (Creation)
- 2015-09-03T15:41:24
- Date info (Revision)
- 2015-09-03T15:41:24
Metadata standard
- Title
- ISO 19115-3:2018
Overviews
thumbnail
large_thumbnail
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available