Résultats de la recherche
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Preliminary assessment of Patagonian toothfish in Subarea 48.4
Abstract: To date, the stocks of toothfish in Subarea 48.4 have been divided, for assessment ... revised assessment of D. eleginoides in Subarea 48.4. The main changes to the assessment are: the removal ... purposes, into northern and southern components. The northern component is assessed as a single species of ... D. eleginoides whilst the southern component is assessed as a combination of D.eleginoides and D ...
Meeting Document : WG-FSA-13/31 : Auteur(s): R. Scott and V. Laptikohvsky (United Kingdom)
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Entanglement of Antarctic fur seals Arctocephalus gazella in man made debris at Signy Island, South Orkney Islands 1997/98
seals wearing neck collars of man-made debris, half the number reported in 1996/97. All of the animals ... number of fur seals in total that came ashore during the season. Data are compared with results from a ... parallel study undertaken at Bird Island, South Georgia in 1997/98 where the number of reported ... had increased in occurrence since the previous season. The percentage of entanglements in packaging ...
Meeting Document : SC-CAMLR-XVII/BG/12 : Auteur(s): Delegation of the United Kingdom
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Estimates of krill biomass with commercial significance in small-scale management units applying geostatistics techniques
Russian survey 2002 were used. Processing of the acoustic survey data in 2000-2002 was made applying ... biomass was 0.41985 mlt and 0.24 mlt respectively. The option “standing stock of krill in the SSMUs ... Abstract: The analysis of krill density and biomass distributions was made by the example of SGE ... geostatistical methods. It was revealed significant inter-annual and seasonal variability of the standing stock ...
Meeting Document : WG-EMM-06/36 : Auteur(s): S.M. Kasatkina and P.S. Gasyukov (Russia)
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Trends in population size and breeding success at colonies of macaroni and rockhopper penguins, Marion Island, 1979/80–1995/96
. The only significant relationship between inter-season trends in the number of pairs breeding at the ... period, while the other remained stable. Trends in the number of pairs breeding at the three rockhopper ... of macaroni penguins were significantly correlated in all three inter-colony comparisons over the ... were significantly correlated in only one of the three inter-colony comparisons. The greater coherence ... (Table 1). The mean number of eggs hatched per clutch varied between nil (in the case of complete ... /90. The lowest survival of chicks was 29% at Macaroni Bay in 1989/90. The overall mean value for ... correlated (Table 2). The mean number of eggs hatched per clutch varied between 0.41 at Trypot Fault in ... 1985/86 and 0.96 at Van den Boogaard River in 1990/91 (Figure 8). The overall mean number of eggs ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 89–103 : Auteur(s): Cooper, J., A.C. Wolfaardt and R.J.M. Crawford
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An assessment of toothfish in Subarea 48.3 using CASAL
Abstract: The CASAL software has been successfully applied to an assessment of the stock of ... single fleet, as it is possible that overall trends in the CPUE series were not fully taken into account ... in the two fleet assessment. This alternative assessment produced worse fits to the catch length ... 45,893 t, and the spawning stock biomass was estimated to be 120,360 t, around 67% of its unexploited ...
Meeting Document : WG-FSA-05/16 : Auteur(s): R.M. Hillary, G.P. Kirkwood and D.J. Agnew (United Kingdom)
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Results of E.L. Holmberg 1995 fish survey in Subarea 48.3
Abstract: The survey comprised 48 bottom trawl hauls taken in subarea 48.3. About 80% of the ... hauls were intended as replicates of the position of hauls in the 1994 survey, allowing site by site ... aggregation of stations in a nested ANOVA model. An increase over last year's values was observed in the ... . The age and size structure of this species in the whole subarea 48.3 is characterized the predominance ...
Meeting Document : WG-FSA-95/35 : Auteur(s): Marschoff, E., Madirolas, A., Balestrini, C., Tossonotto, G., Gonzalez, B., Calcagno, J.
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Preliminary model of krill fishery behaviour in Subarea 48.1
: A simple model of the behaviour of the krill fishery in FAO Statistical Subarea 48.1 (South Shetland ... catches in the subarea. A number of management scenarios are considered which involve the closure of (i) a ... . However, in this scenario, the catch would be more concentrated in foraging areas of land-based predators ... Paper Title: Preliminary model of krill fishery behaviour in Subarea 48.1 Abstract / Description ... compares well with the mean distribution of all catches in the study area over the years 1988 to 1992 as ... simple model of the behaviour of the krill fishery in FAO Statistical Subarea 48.1 (South Shetland ... catches in the subarea. A number of management scenarios are considered which involve the closure of (i ... at present. However, in this scenario, the catch would be more concentrated in foraging areas of ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 71–79 : Auteur(s): Agnew, D.J. and V.H. Marín
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Selectivity and two biomass measures in an age-based assessment of Antarctic krill (Euphausia superba)
selectivities were examined. Parameters were estimated in phases with the sequential order of the phases ... quantities was tested using simulated data. Annual trends in the estimates of total biomass, spawning biomass ... selectivity to investigate the population dynamics of Antarctic krill (Euphausia superba) near the Antarctic ... the South Shetland Islands from 1992 to 2011. Two indices of krill biomass based on (1) trawl-net ...
Meeting Document : WG-EMM-15/P07 : Auteur(s): D. Kinzey, G.M. Watters and C.S. Reiss
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Diet composition of Champsocephalus gunnari in Subarea 48.3, Dr Eduardo Holmberg survey, February/ March 1994
Abstract: The diet composition of the icefish Champsocephalus gunnari caught in the Subarea 48.3 ... in February/March 1994 was analyzed using the frequency of occurrence (%) method. Krill (Euphausia ... Georgia, in parallel with the virtual absence of mysids and Thysanoessa spp.. Krill was available for fish ... particular spatial distribution of krill in the area in the period of study, but no previous data are ...
Meeting Document : WG-FSA-94/27 : Auteur(s): E. Barrera-Oro, R. Casaux and A. Roux (Argentina)
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Population assessment of Patagonian toothfish in Subarea 48.4
Abstract: This paper presents an update of the assessment of toothfish (Dissostichus spp.) in ... from the Petersen biomass estimates of Dissostichus spp. in the southern region and application of the ... development of the assessment of toothfish in Subarea 48.4 are considered. Author(s): R. Scott (United ... Subarea 48.4. The Subarea is divided into two management regions and assessed using a CASAL assessment of ...
Meeting Document : WG-FSA-12/36 : Auteur(s): R. Scott (United Kingdom)