IMAS Metadata Catalogue
The size and composition of eggs from giant crabs (Pseudocarcinus gigas) monitored to determine trends through embryogenesis
In giant crabs (Pseudocarcinus gigas), two sets of data were collected: the first examined changes in egg composition during embryogenesis and the second assessed effects of female size on egg composition.
Simple
Identification info
- Date (Creation)
- 2007-03-29T00:00:00
Principal investigator
Tasmanian Aquaculture and Fisheries Institute (TAFI) - Gardner, Caleb, Dr
Private Bag 49
Hobart
TAS
7001
Australia
- Purpose
- To test if the effects of female size and successive clutches on egg size represent real differences in parental contribution (in other words, do bigger female giant crabs produce better eggs?).
- Credit
- Australian Postgraduate Award
- Credit
- University of Tasmania
- Credit
- Tasmanian DPIF
- Credit
- Victorian DCNR
- Status
- Completed
Principal investigator
Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Gardner, Caleb, Dr
IMAS - Taroona
Private Bag 49
Hobart
TAS
7001
Australia
- Topic category
-
- Biota
Extent
N
S
E
W
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S
E
W
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S
E
W
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N
S
E
W
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N
S
E
W
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N
S
E
W
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E
W
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Temporal extent
- Time period
- 1994-05-01T00:00:00 1995-09-15T00:00:00
Vertical element
- Minimum value
- 300
- Maximum value
- 380
- Identifier
- EPSG::5715
- Name
- MSL depth
- Maintenance and update frequency
- Not planned
Resource format
- Title
- Microsoft Excel (xls)
- Date
- Edition
- 2003
- CAAB - Codes for Australian Aquatic Biota v2.
-
- 28 925001
- Pseudocarcinus gigas
- Keywords (Place)
-
- Tasmania
- Keywords (Theme)
-
- egg
- Global Change Master Directory (GCMD) Earth Science Keywords Version 8.0
- Keywords (Theme)
-
- Carapace length
- Whole weight
- Egg diameter
- Egg weight
- Percentage lipid
- Percentage protein
Resource constraints
- Access constraints
- Copyright
- Use constraints
- Copyright
- Other constraints
- Please contact researcher for access to the data.
Resource constraints
- Classification
- Unclassified
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.
- Language
- English
- Character encoding
- UTF8
- Environment description
- change in egg composition through time.xls Uni_file_Id: TAS_CG_20070329_07
- Supplemental Information
- Gardner, C. (2001). Composition of eggs in relation to embryonic development and female size in giant crabs [Pseudocarcinus gigas (Lamarck)]. Marine and Freshwater Research, 52: 333-338.
Content Information
- Content type
- Physical measurement
- Name
-
Carapace length
- Name
-
CL
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UXMM
- Name
- Millimetres
- Name
-
Whole weight
- Name
- Grams
- Name
-
Egg diameter
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UXMM
- Name
- Millimetres
- Name
-
Egg weight
- Name
- Grams
- Name
-
Percentage lipid
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UPCT
- Name
- Percent
- Name
-
Percentage protein
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UPCT
- Name
- Percent
Distribution Information
- Distribution format
-
-
Excel Spread Sheet
-
Excel Spread Sheet
Distributor
- OnLine resource
-
imas:DP1_CGardner_Monitoring_size_composition_eggs_from_giant_crabs_GV
MAP - Locations of giant crab collections
Resource lineage
- Statement
- Two sets of samples were collected: the first examined changes in egg composition during embryogenesis and the second assessed effects of female size on egg composition. For the first, 22 ovigerous females were captured in traps from depths in the range of 300 to 380 m off the east coast of Tasmania (41°15'S,148°40'E) in May 1994 by a commercial fisher. Ovigerous females had only just begun to be observed by fishers so these egg masses were regarded as recently extruded. Females ranged from 2.2 to 3.5 kg and were maintained in two 4-m3 tanks with flow-through water supply and fed twice weekly. Hatching occurred over a period of two weeks in November 1994, during which females were checked every two days to allow the date of egg sample collection to be back-calculated, relative to hatching. Females were individually tagged and samples of eggs (around 30 g) were removed at 165, 125, 75, 50 and 20 days before hatching (averaged across sample). This first set of samples delineated a period during development when egg composition was relatively stable; sampling of females to determine the effect of female size was then conducted during this more stable period. Development of eggs was staged by a qualitative scheme. For the second set of samples, ovigerous female crabs (n=143) were collected during the period 10 August to 15 September 1995 from eastern Tasmania (n=30), and western Tasmania (n=113). Half of the egg mass was removed from each female for analysis of composition (development of individual eggs was homogeneous within the egg mass). Four of these females were captured with more advanced eggs but all eggs retained for analysis were at development Stage II. The time since moulting was roughly quantified in this study by assigning a carapace condition grade ranging from Grade 1, clean shelled, to Grade 3, heavily worn and fouled (Gardner 1997). This carapace condition grade was not intended to provide a direct scale of years since the previous moult; rather, it simply assumes that a heavily fouled female is more likely to have produced previous broods than a clean-shelled female.
- Hierarchy level
- Dataset
- Hierarchy level
- Dataset
Platform
Identifier
- Code
- fishing vessel
Metadata
- Metadata identifier
-
804109a0-44a9-11dc-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/804109a0-44a9-11dc-8cd0-00188b4c0af8
Point of truth URL of this metadata record
- Date info (Creation)
- 2020-09-17T17:42:29
- Date info (Revision)
- 2020-09-17T17:42:29
Metadata standard
- Title
- ISO 19115-3:2018
Overviews
Spatial extent
N
S
E
W
N
S
E
W
N
S
E
W
N
S
E
W
N
S
E
W
N
S
E
W
N
S
E
W
Provided by
Associated resources
Not available