Résultats de la recherche

1. The Kerguelen database

   and biological data for the Kerguelen EEZ has been operating in France since 1979. At the end of the ... . At the end of the split-year 1985/86 25445, trawlings have been registered in a database. The LFD ... a".:'O .9.00 .q.IO aQ.2U • ~.30 o1q.~O • ~.50 50.ou ~o.IO ~(I.20 50.30 5U .. !lCi ... .30 Ob.40 4& .50 41.00 07.10 47.20 41.30 47.00 47.50 .t .00 "fi.IO o~ .20 4ft.30 till. QU ... ilK .50 .9.00 4Q.IO . OQ.20 .Q.30 Cq.QO OQ.5U ~O .00 50.10 50.20 50.30 5u.40 511.50 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 23-54 : Auteur(s): Duhamel, G.

2. On the intensity of sampling krill trawl catches

   uses actual krill length-frequency data in an attempt to address the problem of the determination of ... be discerned (e.g., length-with-age). At present, and in the interests of both statistical rigour and ... differences in length should be considered in conjunction with the need to collect information on maturity ... 120 100 90 80 70 60 50 40 30 20 10 30 35 i i i i i i i i i i i i i ... In t5 rr; 20 -' Z 4: 18 ~ ~ 16 w u 14 Z w c:;,: w u.. 12 u.. B w 10r 10 -' co ... CATCHES D.G.M. Miller* Abstract This paper uses actual krilllength-frequency data in an attempt to ... desired biological characteristics which are to be discerned (e.g., length-with-age). At present, and in ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 29–48 : Auteur(s): Miller, D.G.M.

3. Detection and quantitative estimation of krill concentrations by hydroacoustic instruments

   instruments Abstract / Description:  The limited capabilities of existing hydroacoustic instruments in ... in areas surveyed. The task of detecting surface concentrations of krill can be solved with the help ... capable of registering individual krill at a depth of 50–60 m while the vessel is in motion. According to ... expense of a rise in the acoustic power of emission. File:  06-Yudanov.pdf ... transmitter frequency. Thus, echo sounders operating at comparatively low frequencies (20-30 kHz) are much ... length of transmitted pulses less than 1 msec., 2 specific power can be accepted as 15-20 Wt/cm. In ... . Investigations over many years have proved that krill disperses extremely non-uniformly over vast areas in the ... different years and seasons. In the same area at different times, krill can form large concentrations in ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 123-139 : Auteur(s): Yudanov, K.I.

4. Modelling krill recruitment

   observed values of the mean proportion of recruits and its variance to model recruitment in a krill ... population in terms of numbers of recruits. The method includes the calculation of natural mortality and ... in the observed recruitment parameters.  File:  04delamare-mod-rec.pdf ... estimated. MODEL DEVELOPMENT In modelling a krill population we need, in each year of a simulation, a ... the recruitment in each year is randomly and independently distributed, then it can be shown that ... and its variance to model recruitment in a krill population in terms of numbers of recruits. The ... which are consistent with the statistical uncertainty in the observed recruitment parameters. Resume ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 49–54 : Auteur(s): W.K. de la Mare

5. Some comments on the procedure for testing estimators of krill abundance which utilise survey data

   indeed likely to provide improved performance in practice. Such studies require a simple method for ... provide an encouraging improvement in fits to the distribution of inter-swarm distances observed on the ... suggestions are made in this regard. File:  11-Butterworth-et-al.pdf ... procedure in most circumstances. An objection that has been raised to this approach is that it is ... between [0, 0.5] and [2, 20] km, and too high in the complementary ranges. The fact that the X Z values ... 18 20 22 24 26 28 Figure 1: Krill aggregations detected in the south-west Indian Ocean during FIBEX ... indeed likely to provide improved performance in practice. Such studies require a simple method for ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 191–205 : Auteur(s): Butterworth, D.S., D.L. Borchers and D.G.M. Miller

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

   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 ... age assessments of fish longer than 30 cm having an enlarged otolith centre. An age/length key for the ... third quarter of the year was also calculated. File:  04-Frolkina.pdf ...

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

7. Toothfish, Dissostichus eleginoides, at South Georgia

   Dissostichus eleginoides fishery at South Georgia has expanded greatly in recent years. It has been claimed ... longliner in January 1990 indicates that the fish are sexually mature and, at the time of sampling, are ... Georgia has expanded greatly in recent years. It has been claimed that the exploited fish are senescent ... examination of the gonads of a small sample of fish taken from a commerciallongliner in January 1990 ... that a TAC of 1200 tonnes be set for Dissostichus eleginoides in Subarea 48.3. That estimate was based ... longline fishery was justified (CCAMLR-VIII, paragraph 106). We know of no fishery anywhere in the World ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 255–261 : Auteur(s): Everson, I. and S. Campbell

8. Integration of CPUE data into assessments using the Generalised Yield Model

   into assessments using the Generalised Yield Model (GYM). In this paper, we propose a method, based on ... the use of importance sampling, for incorporating information on trends in standardised CPUEs into GYM ... eleginoides) in Subarea 48.3. The method requires only very small adjustments to the computer program ... / Description:  For the last three years, CCAMLR's Working Group on Fish Stock Assessment (WG-FSA) has ... abunda~lce of the stock in a given year for each trial is provided in output tables. In tlie absence of ... been presented In CCAMLR as median abundance In each year with 95'% confidence Integration of CPUE ... abundance for that year given the uncertainties in the starting size of the population and the range of ... monitoring of the distributions of the fishable biomass in the final year and of the proportion of times ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 65–74 : Auteur(s): Kirkwood, G.P. and A.J. Constable

9. Physical oceanographic setting of the Siedlecki January 1987, South Shetland Island data set

   data set Abstract / Description:  In the vicinity of the northern tip of the Antarctic Peninsula, the ... relatively cold and low in salinity throughout the water column and prone to deep reach convective events ... -Scotia Confluence in the Bransfield Straits is associated with abundant krill populations. It is ... the mesoscale activity. In summary (see Figure 1): The Weddell-Scotia Confluence brings together ... into the region along the extreme western edge of the Weddell Gyre. It is relatively cold and low in ... south, perhaps associated with mesoscale structures. The Weddell-Scotia Confluence in the Bransfield ... to these changes in the habitat. Our challenge is to understand the causes of environmental ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 161-184 : Auteur(s): Gordon, A.L.

10. Feeding patterns of nine species of Antarctic fish and assessment of their daily food consumption

    fish species in Antarctic waters. The aim of this study is to collect information on the feeding ... patterns of several commercially non-targeted species in the Indian Ocean sector of the Southern Ocean ... station was carried out in the Kosmonavtov Sea (67°50'S; 41°24'E) in March 1988. All samples ... be about five times their body weight. File:  20-Pakhomov-and-Tseitlin.pdf ... * * Abstract Little is known about the feeding patterns of non-commercial fish species in Antarctic waters ... -targetted species in the Indian Ocean sector of the Southern Ocean: Nototheniidae (four species ... composition of these species to find out their daily diet. One 36-hour station was carried out in the ... Kosmonavtov Sea (67"50'S; 41°24'E) in March 1988. All samples were taken from the depth range 300 to 350 m ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 321–333 : Auteur(s): Pakhomov, Y.A. and V.B. Tseitlin

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