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1. Antarctic krill and ecosystem management – from Seattle to Siena

   / Description:  This paper outlines CCAMLR’s development of a management approach for the Antarctic krill ... to be consistent with the objectives of the CAMLR Convention, particularly its Article II. Emphasis ... is given to the initiation of the CCAMLR Ecosystem Monitoring Program (CEMP) and the deliberations of ... CCAMLR statistical areas. This paper complements those of Constable (2002 – this volume) and Everson ... base these on more rigorous appreciations of biological optimal yield aimed at ensuring continued ... stocks) are unlikely to have attained a steady state at the carrying capacity of the environment; and ... soon gathered momentum, and at a series of meetings between 1985 and 1992 (Table 3) elaborated and ... to affect other components of the ecosystem than species at higher trophic levels; (b) those ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 175–212 : Автор(ы): Miller, D.G.M

2. Estimating krill recruitment and its variability

   likelihood method is developed for the decomposition of krill density-at-length data into the proportion of ... recruits in a population sampled by a net haul survey. Preliminary results from a series of five net haul ... surveys in the South Atlantic and the Indian Ocean sectors of the Southern Ocean give a mean recruitment ... rate for 1+ krill (the ratio of the number of krill aged one year to the number of krill aged one year ... of krill density-at-length data into the proportion of recruits in a population sampled by a net ... , variability, CCAMLR de la Mare INTRODUCTION At least year's meeting of the Working Group on Krill (WG ... method for determining numbers-at-age is based on the decomposition of length frequency distributions ... , having a good fit to the distribution of observed densities-at-length from surveys. The assumption of a ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 55–69 : Автор(ы): de la Mare, W.K

3. Small scale krill surveys: simulations based on observed euphausiid distributions

   lowest for the survey design utilising parallel transects set at right angles to the long axis of the ... Abstract / Description:  An observed distribution of aggregations of the euphausiid, Meganyctiphanes ... norvegica is used to model the effects of krill swarm orientation and shape on the success of two proposed ... survey designs. The simulation involves a number of random paths of parallel or radially arranged ... utilising parallel transects set at right angles to the long axis of the aggregations. Calculations based ... , directed at regions around CEMP sites for the duration of CEMP predator parameter monitoring; these may ... origin at the bottom left hand corner with a constant radius of 100 units, but they had a gap close to ... number of rotations of the distributions were used to investigate the effects of starting surveys at ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 245–256 : Автор(ы): Agnew, D.J. and S. Nicol

4. 1989/1990 stock status and TAC assessment for Patagonotothen brevicauda guntheri in South Georgia subarea (48.3)

   . Stock has been assessed at 123.1 thousand tonnes with a TAC of 28.3 thousand tonnes for the initial ... period of 1989/90 fishing season. File:  08-Shilbanov.pdf ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 101–110 : Автор(ы): Shlibanov, V.I.

5. Australian research on Antarctic bird and seal diets

   data on the diets of important vertebrate predator species in Prydz Bay and around the sub-Antarctic ... rather low proportion of the diet of most vertebrate predators. Euphausia crystallorophias and the fish ... use of these predators to monitor the state of prey populations is thus very limited, although ... continuing studies will be useful to assess the natural variability of the system. Around the sub-Antarctic ... Island and Macaroni, E. chrysolophus at Heard Island). A few data are available also on the diets of ... °30'S: 158°57'E), Lusitania Bay. Time: November 1984 to November 1985 Source of material: At least ... contents of 17 birds shot at sea Reference: Montague (1984) Mean weight of all food: 31g, range 2-72g ... . Prey size: Average carapace length of Chorismus was steady through year at 13.3±1.4 mm, but longer ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 231-249 : Автор(ы): Williams, R.

6. A post-processing method to remove interference noise from acoustic data collected from Antarctic krill fishing vessels

   from Antarctic krill fishing vessels Abstract / Description:  The use of fishing-vessel-based acoustic ... data has been recognised as an important way to estimate the distribution and relative abundance of ... Antarctic krill (Euphausia superba), yet the quality and even the utility of the data may be seriously ... degraded by interference noise due to the lack of synchronisation of the acoustic instruments found on some ... at corresponding positions in the thresholded data. Application of the method To evaluate the ... krill swarm echoes. The interfer- ences were most pronounced at 38 kHz because of other acoustic ... . Traykovski. 1998. Effects of orientation on acoustic scattering from Antarctic krill at 120 kHz. Deep-Sea ... data collected from Antarctic krill fishing vessels X. Wang Ocean University of China Qingdao ...

   Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 17–30 : Автор(ы): Wang, X., J. Zhang and X. Zhao

7. Revised age and growth estimates for Antarctic starry skate (Amblyraja georgiana) from the Ross Sea

   ) from the Ross Sea Abstract / Description:  A previous study on the age and growth of Amblyraja ... , after which growth almost ceases (Francis and Ó Maolagáin, 2005). An alternative interpretation of age ... . By counting fine growth bands in the caudal thorns instead of broad diffuse bands, growth curves have ... been generated that suggest much slower growth, greater ages-at-maturity (about 20 years compared with ... potential impact of fishing on this spe- cies, research has been directed at understanding its biology and ... cessa- tion of growth. They estimated the age-at-sexual- maturity to be 6–7 years for males and 8–11 ... lead to different estimates of age-at-maturity, lon- gevity and growth rate from those suggested by ... , but most (61.5%) were scored as reada- bility 4 (bands very unclear over at least part of the thorn ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 211–220 : Автор(ы): Francis, M.P. and M.J. Gallagher

8. Commercial krill fisheries in the Antarctic, 1973 to 1988

   :  STATLANT data reported to the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR ... ) fishery between 1972/73 and 1987/88. The annual krill catch rose gradually to a peak of some 500 000 ... tonnes in 1981/82 before dropping to allow level in 1983/84 and stabilizing at about 400 000 tonnes ... thereafter. In terms of both catch and effort the Soviet and Japanese krill fisheries in Subareas 48.1, 48.2 ... in 1983/84 and stabilizing at about 400 000 tonnes thereafter. In terms of both catch and effort ... current efforts aimed at assessing the role of the minke whale (Balaenoptera acutorostrata) as an ... cessation of fishing in April/May. In Subarea 48.2, on the other hand, fishing commences at a similar time ... realistically applied in the absence of minke whale stomach contents data at a similar level of resolution as ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 229–281 : Автор(ы): Miller, D.G.M.

9. Southern elephant seals and CCAMLR

   of this species have declined at Kerguelen, Marion, Prince Edward and Heard Islands. Population ... research findings of primarily South African (including some French and Australian results) studies on the ... southern elephant seal (Mirounga leonina) in the Kerguelen province of the Southern Ocean. Sub-populations ... been recently confirmed for the Macquarie Island stock. The availability of food, competition with ... . The last includes not only elephant seals of the Kerguelen archipelago, but also those found at ... (feeding) and two terrestrial (fasting) phases can be distinguished in the annual cycle of at least the ... case at lIes Kerguelen where killer whales were seldom seen and the magnitude of the decline of ... to lIes Kerguelen however, suggest a two-way directional migration for at least part of the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 465-473 : Автор(ы): Bester, M.N. and D.G.M. Miller

10. Statistical problems in krill stock hydroacoustic assessments

    :  Two primary issues are at question for hydroacoustic assessments of krill. The first is the methods ... applied to establish biomass in a survey area and the second is the improvement in accuracy of target ... -strength measurements. In the case of statistical methods, there are no clear guidelines for deciding what ... does not invalidate the use of available methods to conduct surveys and analyze results. In the case of ... sampling strategies. However, awareness of the problem can at least prompt consideration of prevailing ... HYDROACOUSTIC ASSESSMENTS M.C. Macaulay Abstract Two primary issues are at question for hydroacoustic ... assessments of krill. The first is the methods applied to establish biomass in a survey area and the second ... is the improvement in accuracy of target-strength measurements. In the case of statistical methods ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 301–309 : Автор(ы): Macaulay, M.C.

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