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1. CCAMLR ecosystem monitoring and management: future work

   -based approach to managing the effects of fi shing on dependent and related species (after de la Mare ... . The dashed line indicates that the local density after fi shing has taken 0.5 of the available abundance ... :  Harvesting of marine living resources in the Southern Ocean is managed by the Commission for the Conservation ... 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 ... use scientific evidence in the decision-making process. Even though this approach was based on the ...

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

2. Length-based assessments revisited – why stock status and fishing mortality of long-lived species such as toothfish cannot be inferred from length-frequency data alone

   selectivity function was similar to the mature function, but truncated at the upper end such that only ... or is depleted after a number of years (Figure 1). Five scenarios with alternative life-history ... development. The failure of the tag-recapture program to provide robust assessments in many areas and doubts ... other informative estimators for stock abundance and productivity, the review and the simulations ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 57–73 : Author(s): Ziegler, P.E., D.C. Welsford and A.J. Constable

3. Differences in distribution and population structure of krill (Euphausia superba) between penguin and fur seal foraging areas near Seal Island

   the individuals as long as possible or until the fur seal or penguin returned to shore at the end of its feeding ... to the nearest millimetres from the tip of the rostrum to the end of the telson. All measurements were carried ... feature of early summer (Ichii, unpublished data), and toward the end of summer fewer and fewer krill may ... (~250 g/m 2). In the inshore foraging areas krill undertake diurnal vertical migrations, tending to be ... at a deeper range from 50 to 100 m in the day while at a shallower range from 20 to 50 m at night. In ... the offshore foraging areas krill do not undertake any diurnal vertical migrations, staying close to ... the surface throughout the day. With regard to body size and maturity of krill in the inshore foraging ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 273–285 : Author(s): Ichii, T., H. Ishii, J.L. Bengtson, P. Boveng, J.K. Jansen and M. Naganobu

4. Beyond MSY: a consideration of definitions of management objectives

   a maximum, but this will rarely be the point corresponding to MSY or GNAI.The difference is most easily ... in quick succession, with no appreciable influence of growth, or of natural death until after spawning ... , occurring after poor environmental conditions. It may also be noted that the policy corresponding to GNAI ... growth and natural mortality. For a period after a brood of young fish recruits, the growth ... / Description:  The concept of ‘Maximum Sustainable Yield’ (MSY) has provided a useful guideline for resource ... management under the assumptions of a simple population model and simple objectives. This paper explores ... different guidelines under more realistic population models, taking account of the objectives set out in ... Article II of the CCAMLR Convention. The criteria will depend on whether the main concern is with ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 299-322 : Author(s): Gulland, J.A.

5. Marine debris and fishing gear associated with seabirds at sub-Antarctic Marion island, 1996/97 and 1997/98: in relation to longline fishing activity

   to analyse trends, the data has been divided into the two field seasons: May 1996 to the end of April 1997 ... (hereafter referred to as 1996/97), and May 1997 to the end of April 1998 (referred to as 1997/98 ... between December (egg laying) and April (end of brood phase) and at monthly intervals between May ... debris found in association with seabirds at sub-Antarctic Marion Island for the period May 1996 to April ... 1998 is reported. Standardised searches and incidental finds show a large increase between the 1996/97 ... and the 1997/98 field seasons. Fishing gear increased at a rate 10 times higher than 'other' ... found. Prior to this study only three hooks (all from the southern bluefin tuna longline industry) had ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 85–96 : Author(s): Nel, D.C. and J.L. Nel

6. Results of fish stock assessment survey, South Georgia, December 1987 - January 1988

   (K) = a! GOT050 END IF FOR I = 1 TO NK(K) SUM1 = SUM1 + AR(K, I) NEXT I MEAN(K) = SUM1 / NK(K): 'MEAN ... I IF NK(K) = 1 THEN S2(K) = 0 ELSE S2(K) = SUMV / (NK(K) - 1): 'VARIANCE BY STRATUM END IF PRINT ... END IF PRINT "VARIANCE OF STRATIFIED MEAN" VST= 0 33 FOR K= 1 T03 VST = VST + (V(K) * (BETA ... * 100 END IF PRINT "MINIMUM POPULATION ESTIMATE, BASED ON STRATIFIED MEAN" PST = STMEAN * BETAST ... Abstract / Description:  Commercial fish stocks around South Georgia have been declining since the early ... complements earlier surveys in the same area and showed that most of the stocks are continuing to decline ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 19-52 : Author(s): McKenna, Jr., J.E. and S.B. Saila

7. Age and growth of spiny icefish (Chaenodraco wilsoni Regan, 1914) off Joinville–D’Urville Islands (Antarctic Peninsula)

   intervals from 1978/79 to 1988/89, before the area was closed by CCAMLR to any harvesting after the 1989 ... ; Kock et al., 2008). After a relatively long incubation period (8–9 months) dur- ing which males guard ... that the opaque nucleus was deposited in the course of the first summer after hatching, fol- lowed by the first ... selected for the study, consisting of 120 females and 98 males. The age of fish was estimated by counting ... in moulds. The precision of age estimates between readings was tested applying both the average ... percent error (APE) and the coefficient of variation (CV). Conversely, the accuracy of age estimates was ... not tested, so that present ageing data haveto be considered with caution. The estimated age range was ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 115–130 : Author(s): La Mesa, M., A. De Felice, C.D. Jones, K.-H. Kock

8. Homogeneity of Adélie penguins as krill samplers

   AND METHODS During summer 1989/90, 27 Ad6lie penguins from the Bahia Esperanza rookery were marked after ... ANOVA design was used to measure the variance component due to differences between individual Adélie ... penguins in the length of krill eaten, using data from Esperanza Bay. The variance component-0.26 was not ... significantly different from zero (F = 0.093; P = 0.54).This finding supports the argument for using individual ... penguins to estimate parameters of the prey population without discriminating by sex, weight or other ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 253–257 : Author(s): Marschoff, E. and B. Gonzalez

9. Assessment of krill flux factors in waters of South Orkney Islands during summer 1996

   the surface after taking into account the vessel's draught (about 5 m) and aeration of the near-surface ... density and water mass transport. After converting water mass transport (S,,,) over a 40-n mile ... 1996 Abstract / Description:  This paper describes the results of an experiment conducted from 19 ... February to 7 March 1996 to assess krill flux factors in Subarea 48.2. The study area (80 x 240 n miles ... ) was located in the zone of interaction between waters of the Antarctic Circumpolar Current (ACC) and ... the Weddell Sea. The study area covered sites where high krill concentrations had often been observed ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 195–204 : Author(s): Kasatkina, S.M., V.N. Shnar, M.I. Polischuk, A.M. Abramov and V.A. Sushin

10. A rationale for conservation areas within Antarctic waters

    can be developed after the general framework of a conservation strategy has been agreed, some ... ; B, Oates Coast; C, Wilkes Land; D, Queen Maud Land; E, Halley Bay; and F, Weddell Sea. (After Gilbert ... :  The application of potential conservation measures listed in Article IX 2 of the Convention requires ... ‘the designation of regions and sub-regions based on the distribution of populations of Antarctic ... , first priority has been given to surface circulation of southern waters and the distribution of krill ... . This has been supplemented by (limited) information on the distribution of major consumers including ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 513-535 : Author(s): Chittleborough, R.G.

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