Résultats de la recherche
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An underwater setting method for surface longliners, to minimise the accidental/incidental capture of seabirds
., Parnes, P. Title: An underwater setting method for surface longliners, to minimise the accidental ... 1996 to develop a device to set baits underwater on commercial longliners. Trials on two U tube devices ... bait to the setting depth, however a backward facing U tube succeeded in flushing the bait on all ... . On all trials the U tube * successfully flushed the baits to the required three metre depth. The U ...
Meeting Document : WG-FSA-97/53 : Auteur(s): Walshe, K.A.R., Parnes, P.
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An assessment of seabird interactions with longlining operations for Dissostichus eleginoides around South Georgia, March–May 1997
concentrated on taking discarded offal, and accounted for five birds caught. An experiment to assess the ... concentrated on taking returning bait off the line and accounted for eighteen birds caught; giant petrels ... Abstract: Long-lining operations for Dissostichus eleginoides off South Georgia were assessed for ... setting operations and all but one during April, giving an average mortality rate of 0.018 birds/1000 ...
Meeting Document : WG-FSA-97/09 : Auteur(s): Ashford, J.R., Croxall, J.P.
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An examination of variance and sample size for female Antarctic fur seal trip durations
trip duration for the first six trips to sea for 1997/98 (n = 30) and 1998/99 (n = 31) at Cape Shirreff ... sample size in detecting differences between two years of fur seal trip duration data. Female foraging ... year. A bootstrap function was used to examine the effect of sample size on variance. Currently CCAMLR ... , Livingston Island was used to calculate minimum sample sizes necessary to detect differences from year to ...
Meeting Document : WG-EMM-99/45 : Auteur(s): M.E. Goebel (USA)
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An assessment of CCAMLR measures employed to mitigate seabird mortality in longlining operations for Dissostichus eleginoides around South Georgia
-chinned petrels, two black-browed albatrosses and one unidentifiable bird caught on hooks. One giant ... for 18 birds caught; giant petrels concentrated on taking discarded offal, and accounted for five ... Paper Title: An assessment of CCAMLR measures employed to mitigate seabird mortality in ... longlining operations for Dissostichus eleginoides around South Georgia Abstract / Description: Longlining ... lasting 20 minutes each over an observation period of 1.5 to 2 hours. Observations were made from the ... for each day's hauling. Periods were selected in one of two ways: haphazardly over the line when no ... . For sampling units, the mother line was divided into lengths of 30 coils using sequences of three ... marked connecting lines. At the start of hauling, four 30-coil lengths were randomly selected for ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 217–230 : Auteur(s): Ashford, J.R. and J.P. Croxall
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Distribution, demography and discard mortality of crabs caught as by-catch in an experimental pot fishery for toothfish in the South Atlantic
-catch in an experimental pot fishery for toothfish in the South Atlantic Approval: Approved ... Abstract: Between March 2000 and April 2001 two commercial fishing vessels undertook trials at ... South Georgia of a method of fishing for toothfish (Dissostichus eleginoides) using pots. A significant ... area, had an intermediate depth distribution from 400 – 800m. P. formosa was present in shallow waters ...
Meeting Document : WG-FSA-01/32 : Auteur(s): M.G. Purves (South Africa), D.J. Agnew, G. Moreno, C. Yau and G. Pilling (United Kingdom)
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Proposal for an experimental crab fishery in Subarea 48.3
Abstract: An experimental management strategy is proposed for the Paralomis spinosissima fishery ... if only one vessel participates. Author(s): George Watters (USA) Title: Proposal for an ... management strategy is designed for application on a per vessel basis (i.e. vessels may not "cooperate ... population dynamics of P. spinosissima, and consists of three phases to be conducted over a period of two ...
Meeting Document : WG-FSA-93/22 : Auteur(s): George Watters (USA)
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An integrated assessment model for Antarctic krill: progress update
for most combinations of samples grouped by year, area, and leg was somewhat lower when it was ... model estimates of total population abundance for most years and areas when the input data were based on ... data or net densities were used as model inputs for the biomass data, on how the biomass data were ... Abstract: Estimates of population parameters from different configurations of an integrated model ...
Meeting Document : WG-EMM-12/27 : Auteur(s): D. Kinzey, G. Watters and C. Reiss (USA)
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Catch per unit effort (CPUE) data from the early years of commercail krill fishing operations in the Atlantic sector of the Antarctic
does not occur over time for the entire area. High average CPUE were observed in the years 1975/76 and ... discussed as an indicator of krill abundance/biomass and caution is expressed in this regard. Depending on ... are presented from krill fishing operations in CCAMLR Subareas 48.1, 48.2, 48.3 (South Atlantic) for ... years on a subarea and area basis, and between oceanic and shelf regions. Results show that the CPUE may ... and for different years (a to g). (e) Season 1984185 12 10 15 20 25 30 35 40 45 50 55 60 65 ... hours for the split-year (1 July to 30 June); (iii) mean monthly catch/hour for the split-year ... each catch. Statistical tests for year and area differences were carried out using rank methods ... much higher in shelf regions for all three subareas compared to oceanic areas. During this year the ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 31–50 : Auteur(s): Siegel, V., V. Sushin and U. Damm
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Preliminary analyses of an ectoparasite Eubrachiella antarctica as a marker for stock discrimination of Antarctic toothfish in the Ross Sea
set were examined for parasites in Small Scale Research Units (SSRUs) 88.1C, 88.2E and 88.2F; and two ... of an ectoparasite Eubrachiella antarctica as a marker for stock discrimination of Antarctic ... Abstract: This project evaluated the prevalence and intensity of an ectoparasite Eubrachiella ... antarctica as a marker for stock discrimination of Antarctic toothfish in the Ross Sea. New Zealand Ministry ...
Meeting Document : WG-FSA-06/28 : Auteur(s): P.J. Smith, A. McKenzie and L. Tubbs (New Zealand)
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An updated spatially explicit population dynamics operating model for Antarctic toothfish in the habitable depths of the Ross Sea region
Abstract: We present an updated spatially explicit age-structured population dynamics operating ... model for Antarctic toothfish in the Ross Sea region, for a medium scale spatial resolution (189 spatial ... habitat for toothfish (120 cells – semi-restricted model). Model fits to the reproductive data were ... previous model reproductive parameters (proportion maturing and proportion spawning) were derived from two ...
Meeting Document : WG-SAM-14/31 : Auteur(s): S. Mormede, A. Dunn, S. Parker and S. Hanchet (New Zealand)