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CCAMLR ecosystem monitoring and management: future work
: 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 ... species (after de la Mare, 1996). The management procedure is a set of decision rules used to adjust ... . The dashed line indicates that the local density after fi shing has taken 0.5 of the available ... @antdiv.gov.au Abstract 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 ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 233–253 : Автор(ы): Constable, A.J
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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
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 ... mature function, but truncated at the upper end such that only the first 10 mature year classes were ... , the spawning stock reaches a new equilibrium level or is depleted after a number of years (Figure 1 ... CCAMLR aims to ensure that the development of a new and exploratory fishery does not occur faster than ... the Commission is able to achieve the objectives of Article II, notably maintaining stable ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 57–73 : Автор(ы): Ziegler, P.E., D.C. Welsford and A.J. Constable
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Differences in distribution and population structure of krill (Euphausia superba) between penguin and fur seal foraging areas near Seal Island
(~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 ... possible or until the fur seal or penguin returned to shore at the end of its feeding trip. Location of ... measured to the nearest millimetres from the tip of the rostrum to the end of the telson. All measurements ... may be a typical feature of early summer (Ichii, unpublished data), and toward the end of summer ... higher densities (~250 g/m2). In the inshore foraging areas krill undertake diurnal vertical migrations ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 273–285 : Автор(ы): Ichii, T., H. Ishii, J.L. Bengtson, P. Boveng, J.K. Jansen and M. Naganobu
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Beyond MSY: a consideration of definitions of management objectives
/ 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 ... MSY is equal to the minimum catch, occurring after poor environmental conditions. It may also be ... after a brood of young fish recruits, the growth of the individuals exceeds losses due to natural ... DEFINITIONS OF MANAGEMENT OBJECTIVES J .A. Gulland (United Kingdom) Abstract The concept of "Maximum ... Sustainable Yield" (MSY) has provided a useful guideline for resource management under the assumptions of a ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 299-322 : Автор(ы): Gulland, J.A.
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Marine debris and fishing gear associated with seabirds at sub-Antarctic Marion island, 1996/97 and 1997/98: in relation to longline fishing activity
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 ... 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). By the term 'marine debris' we refer ... 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 ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 85–96 : Автор(ы): Nel, D.C. and J.L. Nel
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Results of fish stock assessment survey, South Georgia, December 1987 - January 1988
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 ... Commercial fish stocks around South Georgia have been declining since the early 1970's. A survey to monitor ... these stocks was carried out from December 1987 to January 1988. It complements earlier surveys in the ... same area and showed that most of the stocks are continuing to decline. Notothenia rossii is showing ... Champsocephalus gunnari continue declinando abundantemente. 19 1 . INTRODUCTION The fish stocks of the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 19-52 : Автор(ы): McKenna, Jr., J.E. and S.B. Saila
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Age and growth of spiny icefish (Chaenodraco wilsoni Regan, 1914) off Joinville–D’Urville Islands (Antarctic Peninsula)
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 ... the area was closed by CCAMLR to any harvesting after the 1989/90 fishing season (Kock, 1992; Kock ... Peninsula and in November–December in the Cosmonauts Sea (Pshenichnov, 1988; Kock et al., 2008). After a ... course of the first summer after hatching, fol- lowed by the first translucent zone laid down in the ... February–March 2006 and January 2007. A total of 218 specimens were selected for the study, consisting of ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 115–130 : Автор(ы): La Mesa, M., A. De Felice, C.D. Jones, K.-H. Kock
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Assessment of krill flux factors in waters of South Orkney Islands during summer 1996
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 ... the surface after taking into account the vessel's draught (about 5 m) and aeration of the near ... over the layer 0 to 200 m: i.e. krill density and water mass transport. After converting water mass ... ASSESSMENT OF KRZLL FLUX FACTORS IN WATERS OF THE SOUTH ORKNEY ISLANDS DURING SUMMER 1996 S.M. Kasatkina ... describes the results of an experiment conducted from 19 February to 7 March 1996 to assess krill flux ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 195–204 : Автор(ы): Kasatkina, S.M., V.N. Shnar, M.I. Polischuk, A.M. Abramov and V.A. Sushin
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A rationale for conservation areas within Antarctic waters
: 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 ... major conservation areas can be developed after the general framework of a conservation strategy has ... ANTARCTIC WATERS R.G. Chittleborough (Australia) Abstract SC-CAMLR-VI/BG/23 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 marine living resources ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 513-535 : Автор(ы): Chittleborough, R.G.
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Additional data on anti-Brucella antibodies in Arctocephalus gazella from Cape Shirreff, Livingston Island, Antarctica
Shirreff, Livingston Island, Antarctica Abstract / Description: The first instance of anti-Brucella ... antibodies in the Southern Hemisphere was recorded in two pinniped species from Antarctica: Antarctic fur ... fluid) were tested using the Rose Bengal (RB) test, the Competitive Enzymoimmunoassay (c-ELISA) test and ... the Competitive Enzymoimmunoassay 'COMPELISAO®' test. Antibodies against Brucella spp. were ... interdigital vein in the rear flippers. All the live-sampled specimens were tagged after sampling, as in the ... (INACH) AV. Luis Thayer Ojeda 814, Correo 9 Providencia, Santiago, Chile Abstract The first ... instance of anti-Bvz~celln antibodies in the Southern Hemisphere was recorded in two pinniped species from ... , pleural fluid or pericardic fluid) were tested using the Rose Bengal (RB) test, the Competitive ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 147–154 : Автор(ы): Blank, O., P. Retamal, P. Abalos and D. Torres
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