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Soviet proposals for a program of ecosystem monitoring in the Commonwealth Sea and Prydz Bay
Paper Title: Soviet proposals for a program of ecosystem monitoring in the Commonwealth Sea and ... Prydz Bay Abstract / Description: A general framework for a joint international CCAMLR Ecosystem ... conditions. Background studies include hydrological and hydrochemical surveys as well as observations on ... detailed analyses. This is especially true for data on the spatial distribution of physico-chemical ... particular years, the winter season as well. The total time dedicated to an observation series will depend ... is necessary to have data collected every year for the spring, summer, and autumn seasons and, in ... on the scientific findings obtained each year. - 362 - 4. PARTICIPANTS OF THE MONITORING ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 355-362 : Autor(es): USSR
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Revised estimates of seabed areas within the 500 m isobath of the South Orkney Islands (subarea 48.2) and consequences for standing stock biomass estimates of nine species of finfish
examined, the point estimate of total biomass increased from 5 to 30% for eight species and decreased by 20 ... Islands (subarea 48.2) and consequences for standing stock biomass estimates of nine species of finfish ... , areas of seabed within the 500 m isobath (i.e. 0-500 m) were computed for 50 m depth intervals. Areas ... were calculated based on interpolated surface area of seabed incorporating seafloor slope. These ... computed for 50 m depth intervals. Areas were calculated based on interpolated surface area of seabed ... ) for the 50-150, 150-250 and 250-500 m depth intervals. The updated estimates are about 1 424 (20%) n ... biomass. Of the nine species examined, the point estimate of total biomass increased from 5 to 30% for ... eight species and decreased by 20% for one. Une carte bathymetrique revisee des iles Orcades du Sud ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 197–204 : Autor(es): C.D. Jones
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CPUE indices used in Soviet krill fishery statistics from 1977 to 1992 and their possible utility for evaluation of relative changes in krill biomass
calculated for specific strategies were well correlated. Depending on the fishing strategy used, the number ... possible utility for evaluation of relative changes in krill biomass Abstract / Description: Key catch-per ... and primary data for their calculations, were examined. The main CPUE indices were catch per vessel ... fluctuations in haul duration due to the different fishing strategies used when targeting krill intended for ... . Compared to the Atlas, the RIF statistics contain from 2 to 78% of data for various years and 34.2% of ... data for the entire period from 1986 to 1991. In total, the RIF statistics contain data on 28 324 ... 0 2 4 6 8 10 12 14 16 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 Catch per vessel ... 1986 to 1991 (RIF statistics). 0 5 10 15 20 25 30 35 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 165–177 : Autor(es): Litvinov, F.F., A.Z. Sundakov and V.I. Arkhipov
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Seabird interactions with trawl and longline fisheries for Dissostichus eleginoides and Champsocephalus gunnari
Paper Title: Seabird interactions with trawl and longline fisheries for Dissostichus eleginoides ... incidental mortality were observed during commercial trawling operations for Patagonian toothfish ... (Dissostichus eleginoides) in the 1994/95 season near Macquarie Island and Kerguelen Island. Longlining for D ... . eleginoides and trawling for mackerel icefish (Champsocephalus gunnari) were also observed at Kerguelen. Many ... Division 58.5.1 during longline fishery for D. eleginoides in the vicinity of the 1994/95 season with two ... 12 February 1995 with only two short breaks of less than one day each. The vessel made an average ... ) followed the ship for the final two weeks of fishing. Other species, such as the wandering albatross ... groups on the water close to the ship or flying across the stern area. After the first two weeks of ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 93–99 : Autor(es): Williams, R. and D. Capdeville
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Is the attempt to estimate the biomass of Antarctic fish from a multi-species survey appropriate for all targeted species? Notothenia rossii in the Atlantic Ocean sector – revisited
appropriate for all targeted species? Notothenia rossii in the Atlantic Ocean sector – revisited Abstract ... already heavily fished at the beginning of the 1970s. The closure of the fishery for this species in 1985 ... to provide more accurate estimates of the abundance of the species, it is suggested that an acoustic ... properly in the almost 20 years since the fi shery was closed. Two alternatives to the approach generally ... Introduction The directed fi shery for Notothenia rossii was prohibited by CCAMLR in 1985. No exploitation on ... trends in abundance. Despite the closure of the fi shery almost 20 years ago, none of these multi ... Elephant Island. Catches of the species have been small (<50 kg/ 30 min) with the exception of one or two ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 141–153 : Autor(es): Kock, K.-H., M. Belchier and C.D. Jones
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Seabird interactions with longlining operations for Dissostichus eleginoides around South Georgia, April to May 1994
albatrosses. The average mortality rate for the 20 sets was 0.48 birds/1 000 hooks and maximum mortality 3.12 ... Paper Title: Seabird interactions with longlining operations for Dissostichus eleginoides around ... South Georgia, April to May 1994 Abstract / Description: Longlining operations for Dissostichus ... eleginoides off South Georgia were assessed for incidental mortality and interactions with seabirds. Twenty ... each species in the vicinity of the ship was recorded every 30 minutes. Of the 20 sets for which ... line was used for approximately six of the 20 sets and a noise-emitting scarer, based on regular or ... albatrosses. The average mortality rate for the 20 sets was 0.48 birds/l 000 hooks and maximum mortality ... recommended that the Commission consider mechanisms for placing scientific observers on a high proportion of ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 111–121 : Autor(es): Ashford, J.R., J.P. Croxall, P.S. Rubilar and C.A. Moreno
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A statistical method for estimating the level of IUU fishing: application to CCAMLR Subarea 48.3
, and confidence intervals for, fish and bird catches by IUU vessels. In order to estimate an IUU catch ... catches for the years 2001/02, 2002/03 and 2003/04. File: 07agnew-kirkwood.pdf ... there must have been at least one encounter with an FPV in a year; no encounters in a year are ... with IUU fishing. The mean and variance of fish catch rate was calculated for each area and each year ... simulation model for the three years 1998/99, 1999/2000, 2000/01 and for two lengths of IUU cruise, the ... encounter with an FPV in a year; no encounters in a year are interpreted as zero IUU fi shing. For each IUU ... actual FPV record for a year (October to September), an IUU cruise was randomly placed within the year ... catches for the years 2001/02, 2002/03 and 2003/04. Résumé Ce document décrit une nouvelle méthode ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 119–141 : Autor(es): Agnew, D.J. and G.P. Kirkwood
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Analysis and modelling of the Soviet Southern Ocean krill fleet, II: Estimating the number of concentrations and analytical justification for search data
number of concentrations and analytical justification for search data Abstract / Description: In this ... 1980s. These examples highlight the need for a navigational log as well as a fishing log in order to ... make accurate inferences. In the appendix, a method for correcting for the bias in the detection of ... information is needed. That figure shows two foci for fishing krill with a gap between them. Without echo ... ). (Figure A6 of Appendix 5 of the Krill CPUE Working Group Report contains an error for the curve in which ... (1989) concentrations are presumed to persist for the entire fishing period of14 to 30 days.) 290 ... simulation study of krill fishing by an individual Japanese trawler. Scientific Committee for the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 283–322 : Autor(es): Mangel, M.
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Estimating confidence intervals for fish stock abundance estimates from trawl surveys
Paper Title: Estimating confidence intervals for fish stock abundance estimates from trawl ... surveys Abstract / Description: A method is developed for calculating asymptotic confidence intervals for ... trawl surveys, and in particular, develops an improved method for the estimation of confidence ... net haul densities has to allow for an often substantial probability that a given haul will produce ... distribution with one degree of freedom, at the a probability level. An asymptotic confidence interval for ... biomass, given by: where bj is the biomass estimate for stratum j. In calculating an asymptotic ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 203–207 : Autor(es): de la Mare, W.K
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Improving estimates of Adélie penguin breeding population size: developing factors to adjust one-off population counts for availability bias
to adjust one-off population counts for availability bias Abstract / Description: New methods are ... presented for the collection and development of data to adjust counts of Adélie penguins made at any time in ... the breeding season to an estimate of the breeding population. The development of ‘availability ... population obtained by adjusting a one-off count using availability adjustment factors will not account for ... undertaken ‘on the same day each year…when about two-thirds of chicks have entered crèches’ in the same ... vegetation, for example, may not be available for counting by an observer passing overhead in an aircraft ... , and marine species diving underwater may not be available for counting by an observer in a passing ... , means that population counts cannot always be obtained at an optimal time of a breeding season for ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 229–241 : Autor(es): Southwell, C., J. McKinlay, L. Emmerson, R. Trebilco and K. Newbery