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1. Possible effects of different levels of krill fishing on predators – some initial modelling attempts

   suggested by the Joint Meeting of CCAMLR's Working Group on Krill (WG-Krill) and Working Group for the ... fluctuations together with preliminary information on adult survival and breeding success patterns for certain ... krill predator species. A 'one-way' interaction model is developed, in which krill abundance ... that variability in the annual recruitment of krill results in predator populations being less ... equation (1). Note that T is taken to be the same for each female predator in the population. For seals ... predators. The underlying concepts may be explained by re fe rence t o F igure 1, w h i c h s h o w s ... . (It must be stressed that the estimates given in CCAMLR (1993) are preliminary, and do not ... to natural mortality. In setting an upper bound for S?, account must be taken of the fact that ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 79–97 : Автор(ы): Butterworth, D.S. and R.B. Thomson

2. Classification of Southern Ocean krill and icefish echoes using Random Forests

   are similar to those for many co-occurring fish species that do not possess swim bladders. At South ... pelagic aggregations, which can be difficult to distinguish acoustically from large krill layers. Mackerel ... icefish are currently surveyed using bottom-trawls, but the resultant estimates of abundance may be biased ... during surveys. The final random forest classified krill, icefish, and mixed aggregations of weak ...

   Meeting Document : WG-EMM-16/23 : Автор(ы): N. Fallon, S. Fielding and P. Fernandes

3. Using ecosystem monitoring data to detect impacts

   using monitoring data with no control sites. These methods assess either (i) the expected probability of ... indication from the onset. Furthermore, simulation of all methods suggests that the total probability of ... error (false positives and false negatives combined) is lowest with fixed reference point methods. The ... probabilities of Type I and Type II error can be evaluated analytically for these methods, which facilitates ... could be integrated into the manage- ment of krill fisheries (Constable, 2001, 2002), for example by ... have assumed that such objec- tives would be defined in terms of population size reference points ... of detrimental delays in the management response associated with methods that take a long time to ... once in t years can be calculated using the binomial density function: P(at) = t.p.(1 – p)t (1 ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 197–212 : Автор(ы): Hill, S.L., J. Forcada, P.N. Trathan and C.M. Waluda

4. A synoptic review of energetic requirements of southern ocean krill predators

   requirements of krill predators that may be in the most direct competition with the krill fishery. These krill ... fur (Arctocephalus gazella) seals. Basal, active, and. reproductive energy ' requirements are ... compiled for each species. Estimates' of the amount of krill needed. to sustain individuals and/or ...

   Meeting Document : WG-EMM-96/19 : Автор(ы): Stansfield, A.M.

5. e-sc-xxix-a6.pdf

   ... questions that are to be addressed with the data that are collected. 2.47 The Working Group recalled that ... (Annex 5, paragraph 5.2) that with appropriate parameterisation the revised protocol could be applied to ... considering the proposal, WG-EMM suggested that the research be conducted using similar standards (e.g. a ... the start of fishing operations will ensure that conduct of the research effort is less likely to be application/pdf attached to:WG-EMM-10

   Meeting Report : WG-EMM-10

6. e-sc-xxviii.pdf

   ... meeting of WG-FSA with information that may be used to advise scientific observers in the krill fishery ... Scientific Committee and that this had proved to be a useful way of shortening the reports and allowed ... SG-ASAM meeting in conjunction with ICES WGFAST. It noted that half of the SG-ASAM participants ... -FSA, the Scientific Committee agreed that SG-ASAM should meet in 2010 with the terms of reference as application/pdf attached to:SC-CAMLR-XXVIII

   Meeting Report : SC-CAMLR-XXVIII

7. Histopathology of Antarctic krill, Euphausia superba, bearing black spots

   superba, since January, 2001. To study the nature of the black spots, the krill were sampled in the winter ... revealed that the black spots were melanized nodules that were composed of hemocytes surrounding either ... of the krill that had melanized nodules. These parasites were directly surrounded by the large ... heteromorphic cells. Histological observations suggested that these heteromorphic cells were attacking the ...

   Meeting Document : WG-EMM-08/P09 : Автор(ы): S. Miwa, T. Kamaishi, T. Matsuyama, T. Hayashi and M. Naganobu

8. Exploration of CPUE standardisation variances in the Ross Sea (Subareas 88.1 and 88.2A South of 70°s) Antarctic toothfish (Dissostichus mawsoni) exploratory longline fishery

   effort should be used for catch rates in mixed longline fisheries, and (2) how do different parameters ... size. This confirms previous advice that research fishing is conducted with a high level of spatial and ... (hooks/cluster) with Generalised Linear Models (GLMs). The model with total hook numbers was preferred ... with the lowest Akaike’s Information Criterion (AIC), however standardised catch rates over the fishing ...

   Meeting Document : WG-SAM-2019/25 : Автор(ы): D. Maschette, S. Wotherspoon and P. Ziegler

9. An integrated stock assessment for the Patagonian toothfish (Dissostichus eleginoides) for the Heard and McDonald Islands using CASAL

   weighting were investigated using haul-level estimated effective sample sizes with, additionally ... data. A key uncertainty is the number of ages fully selected by the main survey series. With all the ... appropriate, since SLOF could not be removed to an acceptable degree. The issues concerning the effect of the ... had not been measured for length and to exclude fish that were likely not to have mixed with the ... GYM is that many parameters can be estimated simultaneously within the model, including the pre ... projections across uncertainty in parameter values uses sample sets of parameters that are consistent with ... of issues that need to be addressed in toothfish assessments, notably the age-specific spatial ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 1–34 : Автор(ы): Candy, S.G and A.J. Constable

10. A single-area stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea for the 2004/05 season

    parameters. However, multi-chain comparisons and sensitivities with fixed selectivity ogives suggested that ... yields, using the CCAMLR decision rules, were estimated to be 2964 t although continued catch at current ... levels (3207 t) would not be expected to breach the 50%B0 threshold until 2029. Author(s):  A. Dunn, D.J ... ). A range of model sensitivities were examined, with the base case assuming the Ross Sea fishery as a ...

    Meeting Document : WG-FSA-05/33 : Автор(ы): A. Dunn, D.J. Gilbert and S.M. Hanchet (New Zealand)

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