Data

The size and composition of eggs from giant crabs (Pseudocarcinus gigas) monitored to determine trends through embryogenesis

University of Tasmania, Australia
Gardner, Caleb, Dr
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/804109a0-44a9-11dc-8cd0-00188b4c0af8&rft.title=The size and composition of eggs from giant crabs (Pseudocarcinus gigas) monitored to determine trends through embryogenesis&rft.identifier=https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/804109a0-44a9-11dc-8cd0-00188b4c0af8&rft.description=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.Maintenance and Update Frequency: notPlannedStatement: 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.&rft.creator=Gardner, Caleb, Dr &rft.date=2007&rft.coverage=westlimit=139.50; southlimit=-37.50; eastlimit=140.00; northlimit=-37.00&rft.coverage=westlimit=139.50; southlimit=-37.50; eastlimit=140.00; northlimit=-37.00&rft.coverage=westlimit=143.50; southlimit=-40.50; eastlimit=144.00; northlimit=-40.00&rft.coverage=westlimit=143.50; southlimit=-40.50; eastlimit=144.00; northlimit=-40.00&rft.coverage=westlimit=143.50; southlimit=-40.00; eastlimit=144.00; northlimit=-39.50&rft.coverage=westlimit=143.50; southlimit=-40.00; eastlimit=144.00; northlimit=-39.50&rft.coverage=westlimit=147.00; southlimit=-44.00; eastlimit=147.50; northlimit=-43.50&rft.coverage=westlimit=147.00; southlimit=-44.00; eastlimit=147.50; northlimit=-43.50&rft.coverage=westlimit=147.00; southlimit=-43.50; eastlimit=147.50; northlimit=-43.00&rft.coverage=westlimit=147.00; southlimit=-43.50; eastlimit=147.50; northlimit=-43.00&rft.coverage=westlimit=147.00; southlimit=-43.00; eastlimit=147.50; northlimit=-42.50&rft.coverage=westlimit=147.00; southlimit=-43.00; eastlimit=147.50; northlimit=-42.50&rft.coverage=westlimit=146.00; southlimit=-44.00; eastlimit=146.50; northlimit=-43.50&rft.coverage=westlimit=146.00; southlimit=-44.00; eastlimit=146.50; northlimit=-43.50&rft.coverage=uplimit=380; downlimit=300&rft.coverage=uplimit=380; downlimit=300&rft_rights=Please contact researcher for access to the data.&rft_rights=The data described in this record are the intellectual property of the University of Tasmania through the Tasmanian Aquaculture and Fisheries Institute.&rft_subject=biota&rft_subject=28 925001&rft_subject=Pseudocarcinus gigas&rft_subject=Tasmania&rft_subject=egg&rft_subject=ANIMALS/INVERTEBRATES&rft_subject=EARTH SCIENCE&rft_subject=BIOLOGICAL CLASSIFICATION&rft_subject=CRUSTACEANS&rft_subject=ARTHROPODS&rft_subject=Fisheries Sciences not elsewhere classified&rft_subject=AGRICULTURAL AND VETERINARY SCIENCES&rft_subject=FISHERIES SCIENCES&rft_subject=fishing vessel&rft_subject=Carapace length&rft_subject=Whole weight&rft_subject=Egg diameter&rft_subject=Egg weight&rft_subject=Percentage lipid&rft_subject=Percentage protein&rft.type=dataset&rft.language=English Access the data
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The data described in this record are the intellectual property of the University of Tasmania through the Tasmanian Aquaculture and Fisheries Institute.

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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.

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Maintenance and Update Frequency: notPlanned
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.

Notes

Credit
Australian Postgraduate Award
Credit
University of Tasmania
Credit
Tasmanian DPIF
Credit
Victorian DCNR
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?).

Created: 29 03 2007

Data time period: 05 1994 to 15 09 1995

This dataset is part of a larger collection

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140,-37 140,-37.5 139.5,-37.5 139.5,-37 140,-37

139.75,-37.25

144,-40 144,-40.5 143.5,-40.5 143.5,-40 144,-40

143.75,-40.25

144,-39.5 144,-40 143.5,-40 143.5,-39.5 144,-39.5

143.75,-39.75

147.5,-43.5 147.5,-44 147,-44 147,-43.5 147.5,-43.5

147.25,-43.75

147.5,-43 147.5,-43.5 147,-43.5 147,-43 147.5,-43

147.25,-43.25

147.5,-42.5 147.5,-43 147,-43 147,-42.5 147.5,-42.5

147.25,-42.75

146.5,-43.5 146.5,-44 146,-44 146,-43.5 146.5,-43.5

146.25,-43.75

text: westlimit=139.50; southlimit=-37.50; eastlimit=140.00; northlimit=-37.00

text: westlimit=143.50; southlimit=-40.50; eastlimit=144.00; northlimit=-40.00

text: westlimit=143.50; southlimit=-40.00; eastlimit=144.00; northlimit=-39.50

text: westlimit=147.00; southlimit=-44.00; eastlimit=147.50; northlimit=-43.50

text: westlimit=147.00; southlimit=-43.50; eastlimit=147.50; northlimit=-43.00

text: westlimit=147.00; southlimit=-43.00; eastlimit=147.50; northlimit=-42.50

text: westlimit=146.00; southlimit=-44.00; eastlimit=146.50; northlimit=-43.50

text: uplimit=380; downlimit=300

Subjects
28 925001 | Agricultural and Veterinary Sciences | ANIMALS/INVERTEBRATES | ARTHROPODS | BIOLOGICAL CLASSIFICATION | CRUSTACEANS | Carapace length | EARTH SCIENCE | Egg diameter | Egg weight | Fisheries Sciences | Fisheries Sciences Not Elsewhere Classified | Percentage lipid | Percentage protein | Pseudocarcinus gigas | Tasmania | Whole weight | biota | egg | fishing vessel |

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Other Information
(DATA - Change in egg composition through time data [direct download])

uri : https://data.imas.utas.edu.au/attachments/804109a0-44a9-11dc-8cd0-00188b4c0af8/change_in_egg_composition_through_time.xls

MAP - Locations of giant crab collections (imas:DP1_CGardner_Monitoring_size_composition_eggs_from_giant_crabs_GV)

uri : https://geoserver.imas.utas.edu.au/geoserver/wms

(View and download this data through the interactive IMAS Data Portal.)

uri : http://data.imas.utas.edu.au/portal/search?uuid=804109a0-44a9-11dc-8cd0-00188b4c0af8

Identifiers
  • global : 804109a0-44a9-11dc-8cd0-00188b4c0af8