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1. CCAMLR ecosystem monitoring and management: future work

   of the Antarctic marine ecosystem mostly comprise: (i) statistical models of the dis- tribution and abundance ... may be diffi cult to resolve. For example, krill are known to move from west to east in the Scotia ... sampling. Consequently, the loss of power in the spatial design will need to be compensated for in how ... :  Harvesting of marine living resources in the Southern Ocean is managed by the Commission for the Conservation ... of Antarctic Marine Living Resources (CCAMLR). CCAMLR is widely known for its ecosystem approach to ... managing fisheries with the maintenance of ecological relationships included in the conservation objectives ... . In the late 1980s, CCAMLR’s precautionary approach was developed, incorporating principles of how to ...

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

2. Temporal variability and the interrelationships between CEMP parameters collected on Adélie penguins at Béchervaise Island

   are critical for chick survival. There was a strong negative correlation between female foraging trip duration ... success and foraging trip duration was low for males. Male foraging trips during the crèche period were ... . There was a strong negative correlation between female foraging trip duration during both the guard and the crè ... ;che period and breeding success, while the correlation between breeding success and foraging trip ... M as s (g ) 0 0.2 0.4 0.6 0.8 1 1.2 Br ee di ng s uc ce ss Female on arrival Female at departure Female ... w ee n w it hi n- se as on p en gu in w ei gh ts an d br ee di ng su cc es ... s an d fl ed gl in g m as s. Sh ad ed ce lls in di ca te st at is ti ca lly si ... M al e D ep ar ts on S FT M al e R et ur ns fr om S FT Br ee di ng s uc ce ...

   Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 75–90 : Author(s): Emmerson, L.M., J. Clarke, K.R. Kerry and C. Southwell

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

   , so the dis- tance across a box following the contour (approxi- mated by a straight line ... , arbitrary scale) M od el le d N (n um be r o f t ag s di st rib ut ed to e ac h bo ... 000 M od el le d N (n um be r o f t ag s di st rib ut ed to e ac h bo x) 400 ... mortality. In step 2, the expected number of tagged fish that would have died of natural mortality ... Paper Title:  Investigation of bias in the mark–recapture estimate of toothfish population size at ... South Georgia Abstract / Description:  This paper investigates the influence of mixing of fish, and the ... uneven distribution of tag placements and recapture effort, on bias in the Petersen estimator of ... population size. It does so by constructing a spatial model of the South Georgia toothfish fishery ...

   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

4. Modelling variability and estimating power to detect change in Adélie penguin fledgling weights

   , without substantial loss of power to detect change. Further modelling work is identified to investigate ... period from 50 to 30 without substantial loss of power. If practical, these findings could have ... substantial loss of power to detect change. Further modelling work is identified to investigate ... period from 50 to 30 without substantial loss of power. If practical, these findings could have ... substantial loss of power to detect change. Further modelling work is identified to investigate ... period from 50 to 30 without substantial loss of power. If practical, these findings could have ... at Béchervaise Island (67°35'S 62°49'E), near Mawson Station in East Antarctica, since the 1990/91 breeding ... . The magnitude of the loss in power associated with simplifying the monitoring strategy will depend on the size ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 191–200 : Author(s): Emmerson, L.M., C. Southwell and J. Clarke

5. Analysis of results from demersal fish surveys at South Georgia, undertaken by the United Kingdom and the USSR, January and February 1990

   biomass region east of 37°. The results from this comparison are set out below. The analyses were made ... 250 to 500 9363 Total 936838 N=70 CV=43% 230 Akademik Knipovich survey divided into east ... % 231 Akademik Knipovich survey dividing survey into east and west South Georgia regions East ... by the highest density in the middle stratum of western South Georgia, in which all the larger catches were made ... Paper Title:  Analysis of results from demersal fish surveys at South Georgia, undertaken by the ... discussions and analyses of the data from a survey from MV Hill Cove in January 1990 and RV Akademik Knipovich ... in February 1990 around South Georgia. Both surveys were characterized by large numbers of small ... hauls interspersed with a few large catches. The small number of large catches cause a disproportionate ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 223–254 : Author(s): (Report of a Joint UK/USSR Workshop, 23 to 27 July 1990)

6. Further computations of the consequences of setting the annual krill catch limit to a fixed fraction of the estimate of krill biomass from a survey

   in the middle of the growth season as for model 1 (i.e., in mid-December: t = 1.5/12). As M now varies ... the growth period slightly exceed losses resulting from natural mortality (note that the growth model used ... the balance of the 'year' (growth having ceased): In the middle of the growth season their mass-at-age ... 2: The survey estimate of biomass is made in the middle of the growth season (i.e. mid-December), and prior ... Paper Title:  Further computations of the consequences of setting the annual krill catch limit to ... a fixed fraction of the estimate of krill biomass from a survey Abstract / Description:  Butterworth ... et al. (1992) put forward an extension of the harvesting model of Beddington and Cooke (1983) to ... relate potential krill yield to a pre-exploitation survey estimate of krill biomass. In this paper, the ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 81–106 : Author(s): Butterworth, D.S., G.R. Gluckman, R.B. Thomson, S. Chalis, K. Hiramatsu and D.J. Agnew

7. On the power to detect changes using the standard methods for monitoring parameters of predatory species

   foraging trips (A5.1), penguin breeding success (A6.1), penguin chick diet (A8.1), and fur seal foraging ... trip duration (C2.0). The other Standard Methods are not evaluated because the power analysis ... shifts by penguins(Standard Method A2.1), duration of penguin foraging trips (A5.1), penguin breeding ... success (A6.1), penguin chick diet (A8.1), and fur seal foraging trip duration (C2.0). The other Standard ... by penguins (Standard Method A2.1), duration of penguin foraging trips (AS.1), penguin breeding success (A6.1 ... ), penguin chick diet (A8.1), and fur seal foraging trip duration (C2.0). The other Standard Methods ... considered here. 381 3.5 Duration of Foraging Trips (A5.1) The design for monitoring the duration ... of foraging trips is a nested, or hierarchical, experiment. That is, for any particular year, several ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 377–397 : Author(s): Boveng, P. and J.L. Bengtson

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

   , Gordon and Nowlin, 1978) and abundant krill population (Marr, 1962). The Weddell Gyre is a large, wind ... as far east as the Greenwich Meridian. 2. SIEDLECKI, 1986/87 In 1986/87 the RN Professor Siedlecki ... . MIDDlETON. 1984. The oceanographic structure of the eastern Scotia Sea- I. Physical Oceanography. Deep Sea ... Variability, Springer-Verlag, in press. MARR, J.W.S. 1962. The natural history and geography ... Paper Title:  Physical oceanographic setting of the Siedlecki January 1987, South Shetland Island ... data set Abstract / Description:  In the vicinity of the northern tip of the Antarctic Peninsula, the ... water from the Pacific Ocean. A series of fronts form which are collectively referred to as the Weddell ... Scotia Sea water by a zone of varied width (10 to 100 km) of water which can best be considered as ...

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

9. Quantifying vessel performance in the CCAMLR tagging program: spatially and temporally controlled measures of tag-detection rates

   time by applying the method to the annual fishing trips for each vessel. methods Initially, the case ... is defined as an individual vessel, but the analysis is later extended to vessel- season (trip ... between 15 January and 28 February. Each vessel is assigned a unique trip number for each season, which ... that recapture rates may differ between case and controls due to individual fish movement or tag-loss effects ... temporally controlled measures of tag-detection rates Abstract / Description:  A reliable commercial fish ... tagging program is critical to the successful management of a number of toothfish fisheries in Antarctica ... an integrated stock assessment. Previous attempts to assess the relative reliability of vessels in ... detecting tagged fish have been inconclusive due to low numbers of recaptures after controlling for spatial ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 73–80 : Author(s): Mormede, S. and A. Dunn

10. Improving estimates of Adélie penguin breeding population size: developing factors to adjust one-off population counts for availability bias

    adjustment data for Adélie penguins in East Antarctica. Availability curves, such as those presented here ... Béchervaise Island near Mawson Station, East Antarctica, it is applicable to other Adélie penguin ... ) to undertake a foraging trip of around 17 days duration (Emmerson et al., 2003). Non-breeders and failed ... undertakes a short foraging trip. During this guard phase, many non-breeding birds return to breeding sites ... Paper Title:  Improving estimates of Adélie penguin breeding population size: developing factors ... presented for the collection and development of data to adjust counts of Adélie penguins made at any time in ... the breeding season to an estimate of the breeding population. The development of ‘availability ... adjustment factors’ involves the collection of time-series counts of population objects, such as adults ...

    Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 229–241 : Author(s): Southwell, C., J. McKinlay, L. Emmerson, R. Trebilco and K. Newbery

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