Abundance, Life-cycle and Potential Productivity of 'Euphausia superba' and its Relationship With Other Zooplankton in Prydz Bay, AntarcticaEntry ID: ASAC_229
Abstract: Metadata record for data from ASAC Project 229 See the link below for public details on this project.
From the abstracts of some of the referenced papers:
In January 1985 a net sampling survey was carried out on the distribution and abundance of euphausiid larvae in the Prydz Bay region. Euphausia superba occurred in low abundance, probably due to sampling preceding the main spawning ... period. Thysanoessa macrura occurred throughout the study area in consistently high abundance. Euphausia crystallorophias as marginally more abundant within its restricted range. Distinct north-south variations in larval age and development stages of T. macrura were observed indicating regional differences in spawning. Euphausia frigida was mainly confined to the upper 200 m of the Antarctic Circumpolar Current. Larvae originating on the shelf moved rapidly west in the East Wind drift. E. crystallorophias had the same westward dispersion, but some larvae appeared to return eastward via the Prydz Bay Gyre and remain in the region. The data indicate that most E. superba larvae, providing they survive injurious cold temperature and food deprivation, will leave the area, suggests that Prydz Bay krill may not be a self sustaining stock.
This paper presents results of net sampling carried out in four marine science cruises between 1981 and 1985, in the Prydz Bay region of Antarctica by the Australian Antarctic Division. Krill exhibited a patchy distribution and overall low abundance. The majority of sampling sites in January 1985 returned no post-larval krill or densities of less than 1 individual per 1000 cubic metres. The estimated mean abundance of E. superba in January 1985 was 6 indivduals or 2 g (wet wt.) per 1000 cubic metres integrated for the upper 200m of the water column which represented 3.4% of the total zooplankton biomass. No more than five years-groups, including the larvae, were observed in Prydz Bay, with mean lengths of groups 1+, 2+, 3+ and 4+ being 24, 38, 46 and 53 mm (standard 1), respectively in the middle of January. A high proportion of naupliar stages observed in January 1985 indicated that spawning in Prydz Bay begins in January and examination of adult maturation showed that the spawning continues at least to March.
Sixty female Antarctic krill (Euphausia superba Dana) spawned in shipboard experiments and the interval between egg-laying and ecdysis was noted. The number of eggs laid per female ranged from 263-3662, most females produced only one batch of eggs before moulting, and the post spawn ovaries of all females contained few, if any, mature oocytes. As reported in other studies, the total number of eggs produced per female was not well correlated with body size. Females appeared to spawn at all times during the moulting cycle and although no diurnal rhythm in spawning was observed, moulting occurred mainly at night-time despite the animals being kept in near-constant darkness. No evidence of synchronous moulting was detected.
Data from this project were collected on five Antarctic voyages:
HIMS - Heard Island Marine Science - 1990-05-04 - 1990-07-01 AAMBER II - Australian Antarctic Marine Biological Ecosystem Research II - 1991-01-3 - 1991-03-19 FISHOG - Fish and Oceanography - 1992-01-09 - 1992-03-27 KROCK - Krill and Rocks - 1993-01-05 - 1993-03-09 BROKE - Baseline Research on Oceanography, Krill and the Environment - 1996-01-02 - 1996-03-31
All data are available in the download file.
Data Set Citation
Dataset Originator/Creator: Hosie, G. and Nicol, S.
Dataset Title: Abundance, Life-cycle and Potential Productivity of 'Euphausia superba' and its Relationship With Other Zooplankton in Prydz Bay, Antarctica
Dataset Series Name: CAASM Metadata
Dataset Release Date: 2012-04-05
Dataset Publisher: Australian Antarctic Division
Dataset DOI: doi:10.4225/15/5747A0E68E675Online Resource: https://data.aad.gov.au/aadc/metadata/metadata_redirect.cfm?md=/AMD...
Start Date: 1990-05-04Stop Date: 1996-03-31
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS
BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON > ZOOPLANKTON
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > SPECIES LIFE HISTORY
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > POPULATION DYNAMICS
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > SURVIVAL RATES
Quality Values provided in temporal and spatial coverage are approximate only.
Access Constraints PDF copies of some of the referenced papers are available for download from the provided URL to AAD staff only.
The data are publicly available for download from the provided URL.
Use Constraints This data set conforms to the PICCCBY Attribution License (http://creativecommons.org/licenses/by/3.0/).
Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_229 when using these data.
Data Set Progress
Distribution Media: HTTP
Distribution Size: 13,608 kb
Distribution Format: pdf
Distribution Media: HTTP
Distribution Size: 3 MB
Distribution Format: Excel
Nicol S., Stolp M., Hosie G.W. (1991), Accumulation of fluorescent age pigments in a laboratory population of Antarctic krill Euphausia superba Dana., Journal of Experimental Marine Biology and Ecology, 146, 153-161
Hosie G.W. (1991), Distribution and abundance of euphausiid larvae in the Prydz Bay region, Antarctica., Antarctic Science, 3, 2, 167-180
Hosie G.W., Cochran T.G. (1994), Mesoscale distribution patterns of macrozooplankton communities in Prydz Bay, Antarctica - January to February 1991., Marine Ecology Progress Series, 106, 21-39
Hosie G.W. (1994), The macrozooplankton communities in the Prydz Bay region, Antarctica. El-Sayed S.Z. Southern Ocean Ecology., The BIOMASS Perspective, 93-123
Hosie G.W. (1994), Multivariate analyses of the macrozooplankton community and euphausiid larval ecology in the Prydz Bay region, Antarctica., ANARE Reports, 137, 209
Higginbottom I., Hosie G.W. (1989), A super swarm of krill in Prydz Bay, Antarctica., Marine Ecology Progress Series, 58, 197-203
Nicol S., Stolp M., Hosie G.W. (1991), Age structure of Antarctic krill (Euphausia superba) populations as determined by age-pigment analysis and by size-frequency analysis., Memoirs of the Queensland Museum, 31, 394
Hosie G.W., Ikeda T., Stolp M. (1988), Distribution, abundance and population structure of the Antarctic krill (Euphausia superba Dana) in the Prydz Bay region, Antarctica., Polar Biology, 8, 213-224
Nicol S. (1989), Apparent independence of the spawning and moulting cycles in female Antarctic krill (Euphausia superba Dana)., Polar Biology, 9, 371-375
Nicol S. (1989), Who's counting on krill?, New Scientist, 1690, 20-23
Hosie G.W., Stolp M. (1989), Krill and zooplankton in the western Prydz Bay region, September-November 1985., Proceedings of the NIPR Symposium on Polar Biology, 2, 34-45
Hosie G.W., Kirkwood J.M. (1986), Euphausiid larvae collected from the Prydz Bay region during the Nella Dan cruise (SIBEX I)., Memoirs of National Institute of Polar Research Special Issue, 40, 110-116
Chiba S., Ishimaru T., Hosie G.W., Fukuchi M. (2002), Spatio-temporal variability in life cycle strategy of four pelagic Antarctic copepods: Rhincalanus gigas, Calanoides acutus, Calanus propinquus and Metridia gerlachei., Polar Biosciences, 15, 27-44
Ikeda T., Hosie G., Stolp M. (1986), SIBEX II cruise krill/zooplankton sampling data., ANARE Research Notes, 32, 70
Hosie G.W., Ikeda T., Stolp M., Williams R. (1987), ADBEX III cruise krill/zooplankton sampling data., ANARE Research Notes, 57, 34
Hosie G.W., Kitchener J., Stolp M., Cochran T.G., Williams R. (1991), AAMBER 86/87 cruise krill/zooplankton sampling data., ANARE Research Notes, 79, 54
Hosie G.W. (1992), Multivariate Analyses of the Macrozooplankton Community and Euphausiid Larval Ecology in the Prydz Bay Region, Antarctica, ANARE Reports, 137, 209, Australian Government Publishing Service, 1998, 064220005X, 9780642200051
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Creation and Review Dates
DIF Creation Date: 2000-07-20
Last DIF Revision Date: 2017-08-23