Résultats de la recherche

1. An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island

   (Champsocephalus gunnari) populations at Heard Island are developed from the results of four scientific surveys ... survey conducted at the end of the 1997 fishing season would allow for a catch limit on the Heard Plateau ... Paper Title:  An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island ... Abstract / Description:  Assessments of the abundance and potential yield of the mackerel icefish ... and potential yield of the mackerel icefish (Clzanzpsocephalus guiznari) populations at Heard Island ... tonnes for Sliell Bank. An assessment based on the results of a survey conducted at the end of the 1997 ... to the numbers at age 2, using a natural mortality coefficient (M) of 0.4 (yr-l) (this is the mid ... , with a range of about two orders of magnitude. At South Georgia and Kerguelen it has been found that ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 79–101 : Auteur(s): de la Mare, W.K., R. Williams and A.J. Constable

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

   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 ... Paper Title:  The use of predator-derived krill length-frequency distributions to calculate krill ... , i.e during logistic/resupply operations. This will allow a robust estimate of krill abundance to be ... length-frequency distribution of krill at times when it is possible to run automated shipboard acoustic ... -board data collection systems it will be possible to gain important estimates of krill biomass at times ... availability of krill to predators can change markedly over the course of the breeding season (Reid at al ... that most indices of predator performance usually reflect conditions over periods of at least a month ...

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

3. Preliminary report on biological observations and exploratory fishing data collected in the South Georgia area during the 1985/86 cruise of MT Carina

   . Feeding intensity was rather low for all species at the beginning of cruise. A rapid increase in feeding ... in the South Georgia area during the 1985/86 cruise of MT Carina Abstract / Description:  A fish ... survey in South Georgia waters was undertaken from November 1985 to January 1986 as a part of the on ... -going fish stock monitoring program conducted by the Sea Fisheries Institute, Gdynia. Codends of two ... with the majority at stage Ill. Feeding intensity was rather low for all species at the beginning of ... October) and ended at the end of November/beginning of December because of low c.p.u.e. (Table 11). The ... fish examined in samples were at maturity stages from 11 to V. The prevailing number of fish were at ... maturity stage III (Figure 13). From December, an increasing percentage of gonads at stage IV in male ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 65-97 : Auteur(s): Kreft, K. and J. Szynaka

4. Patagonian toothfish in international waters of the Southwest Indian Ocean (Statistical Area 51)

   located at the edge of the principal area of D. eleginoides concentration, in which a residual recruitment ... Paper Title:  Patagonian toothfish in international waters of the Southwest Indian Ocean ... , following commercial fishing procedures, in a restricted area south of Madagascar and north of Prince Edward ... and Marion Islands and the Crozet Islands, outside EEZs and CCAMLR waters. A total of 57 hauls was ... Crozet Islands, outside EEZs and CCAMLR waters. A total of 57 hauls was made at depths between 360 and 1 ... . eleginoides toothfi sh distribution. The survey area would seem to be located at the edge of the principal ... paper was presented at the 2003 meeting of the Working Group on Fish Stock Assessment (WG-FSA) and SC ... collide at the Subtropical Convergence. Over the ridge, the surface consists of subtropical water masses ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 207–214 : Auteur(s): López Abellán, L.J

5. Statistical power to detect changes in growth rates of Antarctic fur seal pups

   Monitoring Program Standard Method C1 (B). Using estimates of variance in pup weights obtained at Seal Island ... Method (50 pups of each sex, weighed on four dates at 28-day intervals) would result in the ability to ... Paper Title:  Statistical power to detect changes in growth rates of Antarctic fur seal pups ... Abstract / Description:  Numerical simulations were used to investigate the power of methods for detecting ... Standard Method C1 (B). Using estimates of variance in pup weights obtained at Seal Island (60 0 59.5'S ... weaning. Method (B) requires weighing samples of 50 male and 50 female pups at monthly intervals ... dates at 28-day intervals, of sampling smaller numbers of pups at more frequent intervals, and of the ... equal to the weighted averages of those observed in females at Seal Island (Table 2). If four samples ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 399–409 : Auteur(s): Boveng, P., J.L. Bengtson and M.E. Goebel

6. Notothenia (P.) guntheri stock status and TAC estimation in the area of Shag Rocks (Subarea 48.3)

   commercially taken age groups (2-4 years); (b) Fishing intensity in the predicted period is at the level of ... demonstrates that at the current level of fishing (1987/88) the size of the stock of N. guntheri will remain ... Paper Title:  Notothenia (P.) guntheri stock status and TAC estimation in the area of Shag Rocks ... (Subarea 48.3) Abstract / Description:  Data on age composition of catches and fishing efforts for 1979/80 ... into consideration). Of all these methods adjustments of F using the regression equation at which the ... age groups (2-4 years); ( b) Fishing intensity in the predicted period is at the level of 1987/88 ... that at the current level of fishing (1987/88) the size of the stock of N. guntheri will remain ... TAC ESTIMATION IN THE AREA OF SHAG ROCKS (SUBAREA 48.3) K. Shust and R. Borodin Abstract Data ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 53-68 : Auteur(s): Shust, K. and R. Borodin

7. Acoustic data analysis and models of krill spatial distribution

   wavenumber spectrum resembles a white noise at scales of 2-20 km, although at scales smaller than 1 km the ... Paper Title:  Acoustic data analysis and models of krill spatial distribution Abstract ... descriptors of krill spatial aggregation: power spectra for krill biomass fluctuations in space, semivariogram ... (spatial autocorrelation of krill biomass) and the frequency distribution of krill biomass estimate. The ... spectrum resembles a white noise at scales of 2-20 km, although at scales smaller than 1 .km the spectrum ... , indicating an approximately equal variance at all scales (white noise). The result of Weber et al. (1986 ... at small scales. The first step of our approach is to examine the krill biomass distribution in the ... estimated average krill biomass (g/m3; 200 k kHz estimates) at each meter of depth ranging from 3 to 185 m ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 311–329 : Auteur(s): Morin, A., A. Okubo and K. Kawasaki

8. Sensitivity investigation of the SDWBA Antarctic krill target strength model to fatness, material contrast and orientation

   and the orientation at the time and location of the actual survey. Moreover, a number of incongruities ... Paper Title:  Sensitivity investigation of the SDWBA Antarctic krill target strength model to ... model is recognised as state-of-the-art in predicting acoustic target strength (TS) from fluid-like ... TS of Antarctic krill (Euphausia superba) for use in the acoustic echo-integration method. In this ... . Exact solutions can be achieved with analytical restrictions but at the cost of a limited range of ... contrasts and the orientation at the time and location of the actual survey. Moreover, a number of ... into consid- eration another fundamental parameter of the scat- tering process: the orientation. At ... realisations of the ensemble of phase ϕj with fixed standard deviation sdφ, and the TS at a specific angle of ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 97–122 : Auteur(s): Calise, L. and G. Skaret

9. On the intensity of sampling krill trawl catches

   be discerned (e.g., length-with-age). At present, and in the interests of both statistical rigour and ... stages; • for most purposes a minimum sample size of at least 100 animals/trawl is necessary to obtain ... Paper Title:  On the intensity of sampling krill trawl catches Abstract / Description:  This paper ... uses actual krill length-frequency data in an attempt to address the problem of the determination of ... size of at least 100 animalsltrawl is necessary to obtain statistically meaningful differences ... interim measure whereby sampling of at least 50 krill from one haul per fishing day should be undertaken ... , (b) due account should be taken of the number and frequency at which krilllength-frequency samples ... of 50 animals was measured repeatedly at various times (up to 46 hours) after collection. 3 ...

   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.

10. Diet of the Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea, Antarctica (Subarea 88.1)

    stomachs examined respectively). Fish sampled in 2001 were caught at depths of 317 to 2 154 m and ranged ... from 58 to 190 cm in total length (TL). Fish sampled in 2002 were caught at depths of 815 to 1 623 m ... Paper Title:  Diet of the Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea, Antarctica ... (Subarea 88.1) Abstract / Description:  The diet of Antarctic toothfish (Dissostichus mawsoni) captured by ... examined respectively). Fish sampled in 2001 were caught at depths of 317 to 2 154 m and ranged from 58 ... to 190 cm in total length (TL). Fish sampled in 2002 were caught at depths of 815 to 1 623 m and ... –March 2001 and January–March 2002). Fish were caught by bottom longline at depths of 317–2 154 m in ... distribution of the 2001 sample is thus characterised by a broadly defi ned peak of juvenile fi sh (at about ...

    Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 113–123 : Auteur(s): Fenaughty, J.M., D.W. Stevens and S.M. Hanchet

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