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Joint Polish/American hydroacoustic survey of Elephant Island and the vicinity of King George Island, 1988
in most areas covered by last year’s survey. The total biomass in the vicinity of Elephant Island was ... estimated from 120 kHz data to be 260k tonnes and that in the Bransfield Strait south of King George Island ... was 39k tonnes for a total of 299k tonnes in the combined areas. The estimated 200 kHz survey data ... were higher, giving 715k tonnes near Elephant Island and 83k tonnes in the Bransfield Strait. The ... hydroacoustic survey found a low krill abundance in most areas covered by last years survey. The total biomass ... in the vicinity of Elephant Island was estimated from 120 kHz data to be 260k tonnes and that in ... the Bransfield Strait south of King George Island was 39k tonnes for a total of 299k tonnes in the ... and 83k tonnes in the Bransfield Strait. The survey results apply to 7 453 n miles2 near Elephant ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 357–377 : Author(s): Macaulay, M.C.
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An index of per capita recruitment
recruitment (PCR) is proposed such that where R 1 is the proportion of age-l animals sampled in year y and M ... age-l animals in the sample can be determined unambiguously. Normal, lognormal and uniform probability ... distributions of R I, and three levels of M were assumed in order to investigate the resulting distributions of ... years, and when all age-l animals spawn. These conclusions are insensitive to changes in the shape of ... where R1 is the proportion of age-l animals sampled in year y and M is the post-recruit mortality rate ... sample of the population is available; and (iv) the proportion of age-l animals in the sample can be ... M were assumed in order to investigate the resulting distributions of PCR. Distributions of PCR ... . These conclusions are insensitive to changes in the shape of the functional relationship between ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 179–196 : Author(s): Hewitt, R
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An assessment of the merits of length and weight measurements of Antarctic krill Euphausia superba
predictors of wet or dry weight in Antarctic krill Euphausia superba Dana are standardised with new data on ... biomass based on acoustic data. An alternative approach is examined in which length and additional ... biological data are assessed in terms of decreases in the residual variance of relationships. We have ... identified key sources of variability where relatively small increases in the effort of analysis result in ... ) Abstract Published relationships of various length measurements as predictors of wet or dry weight in ... alternative approach is examined in' which length and additional biological data are assessed in terms of ... decreases in the residual variance of relationships. We have identified key sources of variability where ... relatively small increases in the effort of analysis result in large improvements in the precision of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 371-373 : Author(s): Morris D.J., J.L. Watkins, C. Ricketts, F. Buchholz, and J. Priddle
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Directed research. Antarctic Marine Living Resources (AMLR). A program development plan
nporpaMMe U 6 bIn 0 6bI cnoco6HO onepupOBaT b B BOAax AHTapKTUKU eJKerogHo B TetIeHUe 180 AHeH ... . ITpHMetIaHue: ITonHblii TeKCT HacTOHIItero gOKYMeHTa 6bIn ony6nuKoBaH nog BblllIeYKa3aHHbIM 3aronOBKOM ... living resources in the ocean areas surrounding Antarctica. The program is in support of US participation ... in the Commission and Scientific Committee of the Convention for the Conservation of Antarctic Marine ... , among other things, that: “(A) The Director of the National Science Foundation, in consultation with the ... States Antarctic Program; (B) The Secretary of Commerce, in consultation with the Director of the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 363-373 : Author(s): Office of Science and Technology, NMFS, NOAA, US Department of Commerce (USA)
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An assessment of the exploratory fishery for Dissostichus spp. on BANZARE Bank (CCAMLR Division 58.4.3b) based on fine-scale catch and effort data
(CCAMLR Division 58.4.3b) based on fine-scale catch and effort data Abstract / Description: In 2006, the ... biological data submitted by scientific observers on board vessels in the fishery. Results of a Leslie ... of toothfish at the scale of individual fishing grounds in the 2004/05 and 2005/06 seasons. This ... inconsistencies are noted between historical data and those submitted in the 2006/07 season, with Patagonian ... Highway, Kingston 7050 Tasmania, Australia Email – john.mckinlay@aad.gov.au Abstract In 2006, the ... of biological data submitted by scientific observers on board vessels in the fishery. Results of a ... for depletion of toothfish at the scale of individual fishing grounds in the 2004/05 and 2005/06 ... overfished. Several inconsistencies are noted between historical data and those submitted in the 2006/07 ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 55–78 : Author(s): McKinlay, J.P., D.C. Welsford, A.J. Constable and G.B. Nowara
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Use of the Leslie stock depletion model for the assessment of local abundance of Patagonian toothfish (Dissostichus eleginoides)
BbInOJIHeHHbIX PaHee aHaJIM3oB C UeJIblO ll3YYeHHSI B 0 3 M O X H O C T k I MoAeJIllpoBaHllX CHU3HBUI l lXCR ... P ~ I ~ ~ K O B , A3MeHYAByKl YJlOBACTOCTb M CnAUlKOM H U ~ K H ~ ~ BbInOB, K O T O P ~ I ~ ~ He MOr 661 BbI3BaTb ACTO~eHAe ... C. TaGntiua 10: Kpyn~b~fi K O M M ~ P Y ~ C K M ~ ~ npOMbICen Y Iora %inA B 1991192 r., 30Ha 2. HaGop ... used to examine local patterns in catch per unit effort (CPUE) in the longline fisheries for Patagonian ... presents a re-working and synthesis of previous analyses to examine whether declines in CPUE can be ... in localised areas for periods of at least three days. The results suggest that there is greater ... potential for application of the model in some areas than in others, but in general there is no sufficiently ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 55–77 : Author(s): Parkes, G., C.A. Moreno, G. Pilling and Z. Young
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Histological study on the ovarian development of mackerel icefish (Champsocephalus gunnari) from the South Georgia Islands
on ovarian development in Champsocephalus gunnari caught by the RV Dr Eduardo L. Holmberg in the ... South Georgia and Shag Rocks areas in February and March 1994. Six phases of oocyte development were ... to a regression stage. In some cases these ovaries presented few atretic oocytes; in others a ... generalised regression was found, which was observed in 41% of mature fish. A high proportion of juvenile ... histological analysis was carried out on ovarian development in Charnpsocephalus gunnari caught by the RV Dr ... Eduardo L. Holrnberg in the South Georgia and Shag Rocks areas in February and March 1994. Six phases of ... but microscopically conform to a regression stage. In some cases these ovaries presented few atretic ... oocytes; in others a generalised regression was found, which was observed in 41% of mature fish. A high ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 35–49 : Author(s): Macchi, G.J. and E.R. Barrera-Oro
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Seabird by-catch by autoline vessels: do line setters increase the sink rate of integrated weight longlines?
m –1 lead core) longlines by some autoline vessels in the Kerguelen and Crozet Islands Patagonian ... . A trial was conducted in the Ross Sea to determine the effectiveness of line setters in increasing ... were identical, including in the first few metres of the water column where seabird interactions are ... depth of longlines for given distances astern. This increase in depth is minor and unlikely to result in ... weight (IW) (50 g m–1 lead core) longlines by some autoline vessels in the Kerguelen and Crozet Islands ... sink rates. A trial was conducted in the Ross Sea to determine the effectiveness of line setters in ... setter were identical, including in the first few metres of the water column where seabird interactions ... ) the depth of longlines for given distances astern. This increase in depth is minor and unlikely to ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 107–114 : Author(s): Robertson, G., J. Williamson, M. McNeill, S.G. Candy and N. Smith
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Homogeneity of body length composition of Antarctic krill within the commercial zone
Abstract / Description: The homogeneity of krill (Euphausia superba) length composition in commercial ... haul. There was no significant difference (P >0.5) in 53 out of 60 hauls. Therefore it is concluded ... that sampling from one part of the haul provides a reasonable estimate of length composition in the ... entire haul. In contrast to small variations in length composition within the same haul, variation ... (Euphausia superba) length composition in commercial trawl catches (hauls) was investigated by comparing ... ) in 53 out of 60 hauls. Therefore it is concluded that sampling from one part of the haul provides a ... reasonable estimate of length composition in the entire haul. In contrast to small variations in length ... composition within the same haul, variation between different hauls was most noticeable in areas where ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 17–28 : Author(s): Ichii, T.
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Analysis of krill trawling positions north of the South Shetland Islands (Antarctic Peninsula area), 1980/81–1999/2000
commercial krill trawling positions for the 1980/81 to 1999/2000 seasons in the area north of the South ... Shetland Islands were analysed in relation to biological and environmental factors. Commercial fishing ... operations concentrated on the outer shelf in the early 1980s, along the shelf slope in the mid to late 1980s ... , and from the shelf across to the outer shelf in the early to late 1990s. Intra-annually, trawling ... of commercial krill trawling positions for the 1980/81 to 1999/2000 seasons in the area north of the ... South Shetland Islands were analysed in relation to biological and environmental factors. Commercial ... fishing operations concentrated on the outer shelf in the early 1980s, along the shelf slope in the mid ... to late 1980s, and from the shelf across to the outer shelf in the early to late 1990s. Intra ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 25–36 : Author(s): Kawaguchi, S. and K. Segawa