Résultats de la recherche

1. Performance and geometry of the FP-120 trawl used during UK fish stock assessment surveys around South Georgia, Subarea 48.3

   opening (and, thus, swept area) of a bottom trawl are discussed. In situ measurements of the FP-120 trawl ... compared to values obtained from a previous equation. The resulting difference in biomass estimates is of ... Paper Title:  Performance and geometry of the FP-120 trawl used during UK fish stock assessment ... presented. Regression equations for the estimation of horizontal opening from other, more easily measured ... , swept area) of a bottom trawl are discussed. In situ measurements of the FP-120 trawl used during the ... compared to values obtained from a previous equation. The resulting difference in biomass estimates is of ... in January/February 1991, January 1992 and January 1994. Previous estimation of the horizontal net ... , 1991; Enerhaug and Karlsen, in press). Engiis and Goda (1986) showed that several aspects of the ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 51–69 : Auteur(s): Pilling, G. and G. Parkes

2. Methods of age determination for mackerel icefish (Champsocephalus gunnari Lönnberg 1905) from the South Georgia Island shelf

   1905) from the South Georgia Island shelf Abstract / Description:  Radii of annual elements of otoliths ... of mackerel icefish (Champsocephalus gunnari) from the South Georgia shelf were determined by ... analyzing data on length frequency distribution of fish in catches simultaneously with otolith radii of fish ... taken in the period July to September. The latter was done using specimens from strictly defined age ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 37–49 : Auteur(s): Frolkina, Zh.A.

3. The utilization of seabird censuses for krill monitoring

   :  The possibility of using bird observations made at sea as a means of monitoring krill in the Antarctic ... Paper Title:  The utilization of seabird censuses for krill monitoring Abstract / Description ... capable of detecting changes in bird abundance and/or species composition, associated with three levels of ... krill abundance. A vector close to multi-normality was obtained, thus suggesting that refinements of the ... mean vector of the group. This technique, fully detailed in Morrison (1977), allows the construction ... possibility of using bird observations made at sea as a means of monitoring krill in the Antarctic ocean is ... changes in the Antarctic ecosystem will first appear as changes in biological parameters of the species ... in time the advice needed by the Commission and calls for indirect measures of krill population ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 393-425 : Auteur(s): Marschoff, E.R., J.G. Visbeek and L.R. Fontana

4. The use of predator-derived krill length-frequency distributions to calculate krill target strength

   calculated from acoustic data. Changes in the lengthfrequency distribution of krill over a period of a few ... Paper Title:  The use of predator-derived krill length-frequency distributions to calculate krill ... krill sampled from the diet of predators to provide a length-frequency distribution of krill at times ... to gain important estimates of krill biomass at times of the season hitherto unavailable from ... robust estimate of krill abundance to be calculated from acoustic data. Changes in the length ... resource management and to understanding the response of predators to environmental changes. In many ... , in order to consider the interaction between these two factors, measures of prey availability need ... is the Calculation of krill target strength ratio (in decibels, dB) that quantifies the ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 155–163 : Auteur(s): Reid, K. and A.S. Brierley

5. Quantification of Southern Ocean phytoplankton biomass and primary productivity via satellite observations and biogeochemical models (submitted to the 2008 Joint CCAMLR-IWC Workshop)

   regard to their use in the Southern Ocean. A brief history of algorithms linking ocean colour to primary ... / Description:  This paper reviews Southern Ocean primary productivity within the framework of satellite remote ... sensing and the development of food-web models. The satellite ocean colour (chlorophyll) data record is ... described, from the Coastal Zone Colour Scanner (CZCS) in the late 1970s through to the Ocean Colour and ... significant spatial and temporal vari- ability in primary productivity. It is also the region of the global ... estimates of all terms in the oce- anic carbon budget, including primary productiv- ity. In this paper ... use in the Southern Ocean. A brief history of al- gorithms linking ocean colour to primary ... blooms is presented for the major provinces surrounding Antarctica. Some of the published in- formation ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 247–265 : Auteur(s): P.G. Strutton, N.S. Lovenduski, M. Mongin and R. Matear

6. Indices of prey availability near the Seal Island CEMP site: 1990 to 1996

   / Description:  Four indices of prey availability are calculated from surveys conducted in the vicinity of the ... Paper Title:  Indices of prey availability near the Seal Island CEMP site: 1990 to 1996 Abstract ... Seal Island CEMP site during the austral summers of 1990 to 1996. The indices are measures of average ... surveys each year were subsampled to include the foraging range of predators breeding at Seal Island ... availability are calculated from surveys conducted in the vicinity of the Seal Island CEMP site during the ... pattern and energy value. In this paper, indices are proposed for the first four of these aspects of ... sources. Approximately 50 000 km2 of sea surface area in the northern portion of the South Shetland ... , in press (a,b)). Echoes from a 120-kHz transducer, towed 5 m below the surface of the water (1992 ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 37–45 : Auteur(s): Hewitt, R.P., G. Watters and D.A. Demer

7. Preliminary appraisal of Antarctic fish selection by the 32/36 bottom trawl combined with various codends

   . It was found that the selectivity properties of twine codends are unsatisfactory in the case of ... Paper Title:  Preliminary appraisal of Antarctic fish selection by the 32/36 bottom trawl combined ... , especially Scotia Sea icefish and South Georgia icefish the determination of a proper mesh size of trawls ... used in fishing for them requires further research. It should first of all cover twine codends with a ... of the difference in cm between the mean length of fish for selectivity levels 75 and 25%; - 8 ... % selectivity level, A = mean mesh size in the codend determined for a given stage of investigations (wet ... selectivity properties of twine codends are unsatisfactory in the case of Antarctic icefish, burnphead ... Sea icefish and South Georgia icefish the determination of a proper mesh size of trawls used in ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 1-48 : Auteur(s): Zaucha, J.

8. Operational interactions of sperm whales and killer whales with the Patagonian toothfish industrial fishery off southern Chile

   %. Considering that no interactions were recorded in 153 (84%) of the effectively monitored sets, and that the ... = 3). The mean rate of depredation was 3% (±2% CI 95%; n = 180 sets) and ranged between 0 and 100 ... 95% US$47 302–153 745) for the whole fleet, with a mean loss per set of US$138 (CI 95% US$74.76–249.3 ... Paper Title:  Operational interactions of sperm whales and killer whales with the Patagonian ... between 0 and 100%. Considering that no interactions were recorded in 153 (84%) of the effectively ... is available on the magnitude of these interactions, in spite of anecdotal and unpublished ... artisanal Patagonian toothfi sh fi shery in southern Chile (39ºS–57ºS). The specifi c objectives of this ... monitored. Of these, 180 hauls were selected for inclusion in this analysis because of the par- ticu lar ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 127–140 : Auteur(s): Hucke-Gaete, R., C.A. Moreno and J. Arata

9. Book review – Biogeographic Atlas of the Southern Ocean

   Paper Title:  Book review – Biogeographic Atlas of the Southern Ocean Abstract / Description ... -Coudert (Eds). 2014. Biogeographic Atlas of the Southern Ocean. Scientific Committee on Antarctic Research ... :  This is a review of De Broyer, C., P. Koubbi, H.J. Griffiths, B. Raymond, C. Udekem d’Acoz, A.P. Van de ... processes of a significant number of organisms in this region. The atlas begins with a comprehensive ... history of biogeography and bioregionalisation in the Southern Ocean that is followed by a description ... Southern Ocean is then explained in terms of species richness relative to the Arctic and lower latitudes ... models for which there is mostly ongoing support. Key events in the evolution of Southern Ocean marine ...

   Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 45-46 : Auteur(s): Reid, K.

10. Areas of seabed within the 500 m isobath around Elephant Island (Subarea 48.1)

    Paper Title:  Areas of seabed within the 500 m isobath around Elephant Island (Subarea 48.1 ... trawl surveys around Elephant Island (the northernmost island of the South Shetland Islands) from 1977 ... /78 to 1992/93. The results are presented in table format. File:  10kock-harm.pdf ... ) Abstract / Description:  Areas of seabed within 50 m depth contours to a depth of 100 m, and within 100 m ... very precise and more detailed bathymetric charts of the region have been prepared in some Member ... -CAMLR, 1992). In what follows we provide revised estimates of areas of seabed within the 500 m isobath ... A revised bathymetric chart of the Elephant Island shelf is shown in Figure 1. Areas of seabed ... the previous estimate (Kock, 1986). Results in Table 2 show that all estimates of areas of seabed ...

    Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 131–135 : Auteur(s): Kock, K.-H. and U. Harm

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