Instantaneous Growth Rate (IGR) experiments on krill during the BROKE-West voyage of the Aurora Australis, 2006
The IGR experiments were set up whenever large number of live krill in good conditions were caught by RMT haul. Crustaceans grow or shrink in size as they moult. Length of discarded moults represent length of animals before their moulting events. Therefore, by measuring length of discarded moult and...
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ftands:oai:ands.org.au::684828 2023-05-15T13:46:55+02:00 Instantaneous Growth Rate (IGR) experiments on krill during the BROKE-West voyage of the Aurora Australis, 2006 AADC (originator) AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider) Spatial: northlimit=-61.67; southlimit=-69.21; westlimit=29.92; eastLimit=80.04 Temporal: From 2006-01-20 to 2006-03-05 https://researchdata.ands.org.au/instantaneous-growth-rate-australis-2006/684828 https://data.aad.gov.au/metadata/records/BROKE-West_krill_IGR http://data.aad.gov.au/eds/2887/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=2655 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=2679 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=BROKE-West_krill_IGR unknown Australian Ocean Data Network https://researchdata.ands.org.au/instantaneous-growth-rate-australis-2006/684828 58e5f429-422e-47c7-9b0b-a457d385ba5d https://data.aad.gov.au/metadata/records/BROKE-West_krill_IGR http://data.aad.gov.au/eds/2887/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=2655 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=2679 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=BROKE-West_krill_IGR https://data.aad.gov.au biota oceans SPECIES LIFE HISTORY EARTH SCIENCE BIOSPHERE ECOLOGICAL DYNAMICS SPECIES/POPULATION INTERACTIONS EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > PELAGIC EUPHAUSIIDS (KRILL) BIOLOGICAL CLASSIFICATION ANIMALS/INVERTEBRATES ARTHROPODS CRUSTACEANS Instantaneous Growth Rate IGR Intermoult Period IMP Growth Model TRAWL SHIPS LABORATORY R/V AA > R/V Aurora Australis AMD/AU CEOS AMD ACE/CRC OCEAN > SOUTHERN OCEAN CONTINENT > ANTARCTICA GEOGRAPHIC REGION > POLAR dataset ftands 2020-01-05T21:05:40Z The IGR experiments were set up whenever large number of live krill in good conditions were caught by RMT haul. Crustaceans grow or shrink in size as they moult. Length of discarded moults represent length of animals before their moulting events. Therefore, by measuring length of discarded moult and length of animal after moult, growth increments at the time of moult can be obtained. IGR is defined as the growth increment expressed as a proportion of pre-moult total length (TL). IGR can be converted into daily growth rate for a given value of TL by calculating absolute growth increment and dividing by an estimate of inter-moult period (IMP). The IGR technique depends on the collection of live krill in good condition. Krill were caught with an RMT-8 net and individual freshly caught animals were randomly selected from the catch and immediately transferred to individual jars. They were then maintained onboard and checked regularly for moults for up to 5 days following capture. The experiments were run a flowthrough seawater system which used 250 ml jars with small holes to allow water exchange in a large flow-through tank of seawater maintained at ambient ocean temperature. No additional food was provided. The system allowed experiments with over 4000 krill. Each krill was checked daily after capture to ascertain whether it had moulted. If an animal had moulted, then the animal and its moult were collected and frozen in liquid nitrogen or at -85 degrees C to be measured back ashore. The growth rate will be estimated from the difference in length of the uropod of the moult and that of the whole post-moult krill. This work was completed as part of ASAC projects 2655 and 2679 (ASAC_2655, ASAC_2679). Dataset Antarc* Antarctica aurora australis Southern Ocean Research Data Australia (Australian National Data Service - ANDS) Southern Ocean ENVELOPE(29.92,80.04,-61.67,-69.21) |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
biota oceans SPECIES LIFE HISTORY EARTH SCIENCE BIOSPHERE ECOLOGICAL DYNAMICS SPECIES/POPULATION INTERACTIONS EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > PELAGIC EUPHAUSIIDS (KRILL) BIOLOGICAL CLASSIFICATION ANIMALS/INVERTEBRATES ARTHROPODS CRUSTACEANS Instantaneous Growth Rate IGR Intermoult Period IMP Growth Model TRAWL SHIPS LABORATORY R/V AA > R/V Aurora Australis AMD/AU CEOS AMD ACE/CRC OCEAN > SOUTHERN OCEAN CONTINENT > ANTARCTICA GEOGRAPHIC REGION > POLAR |
spellingShingle |
biota oceans SPECIES LIFE HISTORY EARTH SCIENCE BIOSPHERE ECOLOGICAL DYNAMICS SPECIES/POPULATION INTERACTIONS EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > PELAGIC EUPHAUSIIDS (KRILL) BIOLOGICAL CLASSIFICATION ANIMALS/INVERTEBRATES ARTHROPODS CRUSTACEANS Instantaneous Growth Rate IGR Intermoult Period IMP Growth Model TRAWL SHIPS LABORATORY R/V AA > R/V Aurora Australis AMD/AU CEOS AMD ACE/CRC OCEAN > SOUTHERN OCEAN CONTINENT > ANTARCTICA GEOGRAPHIC REGION > POLAR Instantaneous Growth Rate (IGR) experiments on krill during the BROKE-West voyage of the Aurora Australis, 2006 |
topic_facet |
biota oceans SPECIES LIFE HISTORY EARTH SCIENCE BIOSPHERE ECOLOGICAL DYNAMICS SPECIES/POPULATION INTERACTIONS EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > PELAGIC EUPHAUSIIDS (KRILL) BIOLOGICAL CLASSIFICATION ANIMALS/INVERTEBRATES ARTHROPODS CRUSTACEANS Instantaneous Growth Rate IGR Intermoult Period IMP Growth Model TRAWL SHIPS LABORATORY R/V AA > R/V Aurora Australis AMD/AU CEOS AMD ACE/CRC OCEAN > SOUTHERN OCEAN CONTINENT > ANTARCTICA GEOGRAPHIC REGION > POLAR |
description |
The IGR experiments were set up whenever large number of live krill in good conditions were caught by RMT haul. Crustaceans grow or shrink in size as they moult. Length of discarded moults represent length of animals before their moulting events. Therefore, by measuring length of discarded moult and length of animal after moult, growth increments at the time of moult can be obtained. IGR is defined as the growth increment expressed as a proportion of pre-moult total length (TL). IGR can be converted into daily growth rate for a given value of TL by calculating absolute growth increment and dividing by an estimate of inter-moult period (IMP). The IGR technique depends on the collection of live krill in good condition. Krill were caught with an RMT-8 net and individual freshly caught animals were randomly selected from the catch and immediately transferred to individual jars. They were then maintained onboard and checked regularly for moults for up to 5 days following capture. The experiments were run a flowthrough seawater system which used 250 ml jars with small holes to allow water exchange in a large flow-through tank of seawater maintained at ambient ocean temperature. No additional food was provided. The system allowed experiments with over 4000 krill. Each krill was checked daily after capture to ascertain whether it had moulted. If an animal had moulted, then the animal and its moult were collected and frozen in liquid nitrogen or at -85 degrees C to be measured back ashore. The growth rate will be estimated from the difference in length of the uropod of the moult and that of the whole post-moult krill. This work was completed as part of ASAC projects 2655 and 2679 (ASAC_2655, ASAC_2679). |
author2 |
AADC (originator) AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider) |
format |
Dataset |
title |
Instantaneous Growth Rate (IGR) experiments on krill during the BROKE-West voyage of the Aurora Australis, 2006 |
title_short |
Instantaneous Growth Rate (IGR) experiments on krill during the BROKE-West voyage of the Aurora Australis, 2006 |
title_full |
Instantaneous Growth Rate (IGR) experiments on krill during the BROKE-West voyage of the Aurora Australis, 2006 |
title_fullStr |
Instantaneous Growth Rate (IGR) experiments on krill during the BROKE-West voyage of the Aurora Australis, 2006 |
title_full_unstemmed |
Instantaneous Growth Rate (IGR) experiments on krill during the BROKE-West voyage of the Aurora Australis, 2006 |
title_sort |
instantaneous growth rate (igr) experiments on krill during the broke-west voyage of the aurora australis, 2006 |
publisher |
Australian Ocean Data Network |
url |
https://researchdata.ands.org.au/instantaneous-growth-rate-australis-2006/684828 https://data.aad.gov.au/metadata/records/BROKE-West_krill_IGR http://data.aad.gov.au/eds/2887/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=2655 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=2679 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=BROKE-West_krill_IGR |
op_coverage |
Spatial: northlimit=-61.67; southlimit=-69.21; westlimit=29.92; eastLimit=80.04 Temporal: From 2006-01-20 to 2006-03-05 |
long_lat |
ENVELOPE(29.92,80.04,-61.67,-69.21) |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Antarc* Antarctica aurora australis Southern Ocean |
genre_facet |
Antarc* Antarctica aurora australis Southern Ocean |
op_source |
https://data.aad.gov.au |
op_relation |
https://researchdata.ands.org.au/instantaneous-growth-rate-australis-2006/684828 58e5f429-422e-47c7-9b0b-a457d385ba5d https://data.aad.gov.au/metadata/records/BROKE-West_krill_IGR http://data.aad.gov.au/eds/2887/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=2655 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=2679 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=BROKE-West_krill_IGR |
_version_ |
1766245573934972928 |