Search results

1. The 1991/92 fishery for Dissostichus eleginoides in Subarea 48.3

   349.5 380.7 Mixed (see text) Mar del Sur III 48.8 299.4 290 " " " Chaval 42.5 325 350 " " " Antonio ... 6: Figura 7: CB513b Me)K,l{Y YJIOBOM (cpe,l{Hee KOJIW-IeCTBO PbI6 3a TpaJIeHHe 3a BeCb ce30H) H YCHJIHeM ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 31–48 : Author(s): Agnew, D.J. and C.A. Moreno

2. On the intensity of sampling krill trawl catches

   intervals being used in the sample analyses. In this connection it is apparent that the greatest impact ... on the required sample size occurs when the length class difference being assessed is increased from 1 to 2 mm ... , however, is obviously a function of the underlying variance in length of the population(s) being ... small-scale (say between-swarm) variability in the length composition of the population(s) being ... be discerned (e.g., length-with-age). At present, and in the interests of both statistical rigour and ... efficiency of measurement, it is proposed that length measurements made on commercial krill catches should be ... differences in length should be considered in conjunction with the need to collect information on maturity ... measurements of length from commercial krill;  catches should be made, as far as possible, by a single observer ...

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

3. Estimation of effective sample size for catch-at-age and catch-at-length data using simulated data from the Dirichlet-multinomial distribution

   for the empirical coefficient of variation (CV) in the proportions, with one being based on an existing CV model ... are derived from models for the empirical coefficient of variation (CV) in the proportions, with one being ... , with one being based on an existing CV model used for CCAMLR fisheries while the other is a new method ... haul-level fre- quencies to be used as data and, correspondingly, cannot incorporate a mixed-effects ... that corresponds marginally (i.e. averaged across hauls) to a particular mixed-effect multinomial dis- tribution ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 115–138 : Author(s): Candy, S.G

4. By-catch, growth and feeding of Antarctic juvenile fish taken in krill (Euphausia superba Dana) fisheries in the South Georgia area, in 1992

   area from May to August 1992, the total removals of C. gunnari and N. larseni resulting from by-catches ... area from May to August 1992, the total removals of C. gunnari and N. larseni resulting from by-catches ... from the Ukrainian krill fishing fleet in the South Georgia area from May to August 1992, the total ... pb16 COCTaBnRna 18,2%, a KorAa 6 b m ~ YqTeHbI TOJIbKO TpaJIeHHX, IlpoBeAeHHbIe B IlIeJIb@o~b1~ BOAaX ... ~ p a n e ~ ~ x ) . B cnyyae N. larseni COOTBeTCTBYWqHe BeJIMYAHbI COCTaBMlnM 557 * 103 H 1 388 2 248. B Mae-MmHe CpeAHXX ... B ~ C H O B H O M cocToxnu us Chaetognatha, Copepoda I.1 @ypqunuii Thysanoessa Spp. n o AaHHbIM, IIOJIYYeHHbIM C Be ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 129–142 : Author(s): Pakhomov, E.A. and S.A. Pankratov

5. Investigation of bias in the mark–recapture estimate of toothfish population size at South Georgia

   at South Georgia Abstract / Description:  This paper investigates the influence of mixing of fish ... This paper investigates the influence of mixing of fish, and the uneven distribution of tag ... represent mean effort (in hooks) from 2001 to 2004, with the diameter of the circles being proportional ... Abstract This paper investigates the influence of mixing of fish, and the uneven distribution of tag ... there was a considerable mis- match between the distribution of tagging events and fishing effort (Figure 1). Mixing ... the influence of mixing of fish, and the uneven distribution of tag placements and recapture effort, on bias ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 47–63 : Author(s): Agnew, D.J., G.P. Kirkwood, J. Pearce and J. Clark

6. The role of fish as predators of krill (Euphausia superba) and other pelagic resources in the Southern Ocean (submitted to the 2008 Joint CCAMLR-IWC Workshop)

   , 1992; Guinet et al., 1994; Wilson et al., 2001; Boyd, 2002; Kock and Everson, 2003; Weimerskirch et ... being both predators and prey (e.g. Kock, 1992; La Mesa et al., 2004a; Ciaputa and Sicinski, 2006 ... provided by Laws (1977). These esti- mates (some populations already being depleted at the time ... (Butterworth and Thomson, 1995; Murphy, 1995; Mangel and Switzer, 1998; Thomson et al., 2000; Constable, 2001 ... nototheniids, and that the importance of krill in fish diets varies substantially both with time and location ... by mesopelagic fish in the Atlantic sector of the Southern Ocean. It is clear from this review that ... on various scales, as well as with the availability of alternate prey in the different regions in the ... uncertainty exist, which need to be considered in ecosystem and food-web models for the Southern Ocean. For ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 115–169 : Author(s): Kock, K.-H., E. Barrera-Oro, M. Belchier, M.A. Collins, G. Duhamel, S. Hanchet, L. Pshenichnov, D. Welsford and R. Williams

7. Distribution and relative abundance of Antarctic toothfish (Dissostichus mawsoni) on the Ross Sea shelf

   being fished by the exploratory fishery, the spatial management of the fishery and an understanding ... that a paper providing a more com- prehensive analysis of the entire Ross Sea region is being prepared ... 0.20 1 510 2000 3 489 752 1.57 0.33 2 281 2001 7 687 625 0.91 0.18 2 090 2002 2 434 1 365 3.17 0.56 ... . SSRU Fishing year Total 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 881A ... in relative abundance of these subadult fish could be detected. It is recommended that CCAMLR ... potential predators, and thus where any ecosystem effects would be most likely to occur. The shelf catch has ... , with some evidence for an ontogenetic migration from east to west as they grow. From the fisheries data ... the fishery. Nevertheless, it would seem prudent to have a monitoring system in place so that changes ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 33–51 : Author(s): Hanchet, S.M., S. Mormede and A. Dunn

8. A generalised model for evaluating yield and the long-term status of fish stocks under conditions of uncertainty

   B COoTBeTCTBPiM C KpMTepkiXMH AHTKOMa. 31.n KpHTepklci OrpaHMYPiBalQT BePORTHOCTb MCTOUeHRR ... cohort being calculated by numerical integration over a one-year period. The model is initialised ... : g(l,t), the proportion of fish of length l being mature at time of year t; h(a,t), the proportion of fish of age ... a being mature; and p(t), the proportion of the mature stock spawning at t (spawning seasonality). Thus ... the spawning stock biomass in accordance with CCAMLR criteria. These specify a bound on the ... probability that the spawning biomass will become depleted to below some specified level over a specified ... , natural mortality, spawning and fishing on estimates of yield and yield per recruit. It can also be used ... . The procedure numerically integrates a set of differential equations which incorporate functions that ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 31–54 : Author(s): Constable, A. and W.K. de la Mare

9. Is the attempt to estimate the biomass of Antarctic fish from a multi-species survey appropriate for all targeted species? Notothenia rossii in the Atlantic Ocean sector – revisited

   ., 1991, 1992, 1994, 2000, 2002; Jones et al., 1998, 2000, 2001, 2003; Kock, 1991, 1998; Kock et al ... al., 1998, 2001, 2003; Kock, 1991, 1998; Kock et al., 2002). Consequently, biomass estimates ... in 1998 and 2001–2003 (Jones et al., 1998, 2001, 2003; Kock et al., 2002). These surveys were conducted ... seen on the Elephant Island shelf (Jones et al., 1998, 2001, 2003; Kock, 1986, 1998; Kock et al ... survey combined with a number of identification hauls might be the most promising approach to estimating ... part of a subarea is commonly estimated from surveys that target a number of species, including N ... . rossii, at the same time. These surveys are conducted under the assumption that the target fish species ... violated in the case of N. rossii, which is non-randomly distributed such that a large proportion of the ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 141–153 : Author(s): Kock, K.-H., M. Belchier and C.D. Jones

10. CCAMLR ecosystem monitoring and management: future work

    is currently being addressed by WG-EMM. The catch limits are recommended with the expectation (prediction ... et al., 2000), Mangel and Switzer (1998) and Constable (2001) – although such modelling was also ... on the major species (see Yodzis, 2001 for review). Scales of Monitoring and Management for a Krill Fishery ... krill and predators for that year is dependent on the objec- tives being addressed (discussed below ... management procedure which includes decision rules that specify how harvest controls will be adjusted based ... managing fisheries with the maintenance of ecological relationships included in the conservation objectives ... on the scientific information available and the assessments that arise from such information. To ... , incorporating: (i) operational objectives that articulate the target conditions of relevant aspects of the ...

    Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 233–253 : Author(s): Constable, A.J

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