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1. A statistical method for estimating the level of IUU fishing: application to CCAMLR Subarea 48.3

   , unregulated and unreported (IUU) catches of fish and by-catch of birds. It utilises high quality, well ... ’ and ‘unseen’ IUU fishing by using a simulation model to arrive at statistically rigorous estimates of ... , and confidence intervals for, fish and bird catches by IUU vessels. In order to estimate an IUU catch ... interpreted as zero IUU fishing. For each IUU incident detected by the FPV, a theoretical maximum time over ... and by-catch of birds. It utilises high quality, well-documented fi sheries protection vessel (FPV ... ) cruise data. The method takes explicit account of both ‘seen’ and ‘unseen’ IUU fi shing by using a ... bird catches by IUU vessels. In order to estimate an IUU catch there must have been at least one ... incident detected by the FPV, a theoretical maximum time over which this IUU activity could have occurred ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 119–141 : Author(s): Agnew, D.J. and G.P. Kirkwood

2. Estimation of natural mortality using catch-at-age and aged mark-recapture data: a multi-cohort simulation study comparing estimation for a model based on the Baranov equations versus a new mortality equation.

   number of recaptures-at-age and model the population numbersat- age by annual difference equations ... obtained by integrating an ordinary differential equation (ODE) for within-year population dynamics. The ... perturbation by observational error were also carried out for each model in order to investigate the effect on ... so for the BODE model. The reason for this is explained by the confounding of selectivity parameter ... number of recaptures-at-age and model the population numbers- at-age by annual difference equations ... obtained by integrating an ordinary differential equation (ODE) for within-year population dynamics. The ... . Simulations which passed catch-at-age numbers to the estimation algorithm after perturbation by observational ... BODE model. The reason for this is explained by the confounding of selectivity parameter estimates ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 1–27 : Author(s): Candy, S.G.

3. Fishing for toothfish using pots: results of trials undertaken around South Georgia, March–May 2000

   r. C O ~ ~ H H ~ H H O ~ K O ~ O ~ ~ B C T B O IIpOBeJlO 3KCIIepIIMeHTbI IIO nosyruevHoMy npoMbrcny naTaroHcKoro KnbIKava (Dissostichus elegir~oides ... , before the correct gear and methodology had been established. Bait included toothfish heads and squid ... method successfully caught D. eleginoides, there was a large by-catch of crab species. The catch rate of ... eliminated bird by-catch. To capitalise on this feature, there is a need to improve the commercial viability ... of the method and minimise the quantity of by-catch. A number of potential changes are suggested to ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 93–105 : Author(s): Agnew, D.J., T.M. Daw, G.M. Pilling and M.G. Purves

4. Length- and age-at-spawning of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea

   maturation stage by approximately May each year. The age at 50% spawning for females on the Ross Sea slope ... region is 16.6 years (95% CI 16.0–17.3) or 133.2 cm (95% CI 130.9–135.7) by length. On average, males ... ) by length. Evidence of skip-spawning was observed for females only and results in a flatter, right ... the overall population ogive is biased right (older) by applying the slope-derived ogive to the ... developed group of oocytes accumulating at the final maturation stage by approximately May each year. The ... 133.2 cm (95% CI 130.9–135.7) by length. On average, males spawn at a younger age with an A50% of 12.8 ... years (95% CI 11.9–14.0) or 120.4 cm (95% CI 114.8–126.7) by length. Evidence of skip-spawning was ... (older) by applying the slope-derived ogive to the northern Ross Sea region depends on the proportion of ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 53–73 : Author(s): Parker, S.J. and P.J. Grimes

5. Supplementary data on exploited stocks in Division 58.5.1 (Kerguelen)

   Notothenia rossii, a species which is at present only fishable as a by-catch. The total biomass of the stock ... , however, remains very low according to the assessments carried out by the 1987 and 1988 scientific ... increase has been recorded recently, accompanied by an increase in the abundance index, following a ... reduction in catch and fishing effort. This trend could well be reversed by too high a catch in 1988/89 ... fishable as a by-catch. The total biomass of the stock, however, remains very low according to the ... assessments carried out by the 1987 and 1988 scientific research cruises. The abundant 1985 cohort of ... since the creation of the EEZ, a slight increase has been recorded recently, accompanied by an increase ... reversed by too high a catch in 1988/89. Finally, it is not possible to accurately estimate the stock ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 147–161 : Author(s): Duhamel, G.

6. Preliminary atlas of Balaenopterid whale distribution in the Southern Ocean based on pelagic catch data

   the locations of pelagic catches of Balaenopterid whales by month between 1931/32–1979/80. Two sets of ... maps were produced. The first series contains 24 maps of catches by species by month, and the second ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 113-193 : Author(s): Mizroch, S.A. et. al

7. A hybrid approach to acoustic classification and length estimation of krill

   considered. A euphausiid aggregation is represented by a three-dimensional probabilistic vector whose ... are derived by integrating the individual decisions. The size structure of the classified aggregation ... is derived from a fluid-sphere model. The effectiveness of the method is demonstrated by comparing ... euphausiid aggregation is represented by a three-dimensional probabilistic vector whose components are the ... component of a vector, using classical Bayesian techniques. Classifi cation probabilities are derived by ... uid-sphere model. The effectiveness of the method is demonstrated by comparing the acoustic estimates ... and consumed by whales. Therefore it is important to estimate the abundance and geographical distri ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 33–58 : Author(s): Azzali, M., I. Leonori and G. Lanciani

8. Long-term monitoring of krill recruitment and abundance indices in the Elephant Island area (Antarctic Peninsula)

   were re-calculated applying the delta distribution approach introduced by de la Mare (1994a). The high ... interannual variability of krill recruitment is confirmed by the present analysis. Results are compared for ... krill density over the period 1977 to 1994 are also confirmed by this study using randomisation tests on ... . Proportional recruitment indices were re-calculated applying the delta distribution approach introduced by de ... la Mare (1994a). The high interannual variability of krill recruitment is confirmed by the present ... significant fluctuations in krill density over the period 1977 to 1994 are also confirmed by this study using ... ). Furthermore it is necessary to know if high variability of the R, index is a real phenomenon or is biased by ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 19–35 : Author(s): Siegel, V., W. de la Mare and V. Loeb

9. Long-term trends in the foraging patterns of female Antarctic fur seals at South Georgia

   {ecTBeHHoMY YBeJlHqeHHIO W YMeHbweHwlO cpeAHero 1(0nHqeCTBa BblXOAOB B nOWCKax nWlI{w, npw 3TOM 1979 reA ... Georgia Abstract / Description:  The number of feeding trips to sea made by female Antarctic fur seals ... ) the number of feeding trips made by an individual’'s mother during lactation. This analysis ... showed that between 1962 and 1981 the mean number of feeding trips made by female fur seals varied ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 441-443 : Author(s): Bengtson, J.L.

10. Marine mammals and demersal longline fishery interactions in Crozet and Kerguelen Exclusive Economic Zones: an assessment of depredation levels

    longline fishing operations were reported by observers on board fishing vessels targeting Patagonian ... monitored. Interactions were observed in all fishing areas. The effect of depredation was assessed by ... marine mammal species alone or in co-occurrence. In the Crozet EEZ, CPUE was found to be reduced by 22.5 ... % in the presence of killer whales, 12.1% by sperm whales, and 42.5% when both species were present ... reported by observers on board fi shing vessels targeting Patagonian toothfi sh (Dissostichus eleginoides ... . Interactions were observed in all fi shing areas. The effect of depredation was assessed by comparing catch ... mammal species alone or in co-occurrence. In the Crozet EEZ, CPUE was found to be reduced by 22.5% in ... the presence of killer whales, 12.1% by sperm whales, and 42.5% when both species were present ...

    Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 67–82 : Author(s): Roche, C., C. Guinet, N. Gasco and G. Duhamel

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