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Factors to consider in developing management measures for krill
/ Description: A brief review of the objectives of the Convention for the Conservation of Antarctic Marine ... Living Resources is given along with an outline of steps for the evolution of management procedures for ... management, modelling, indicator species, pulse fishing, and the use of open and closed areas and seasons are ... little or no regulation of fishing operations in the open areas, provided that there were limited ... sites. This may lead to complications in choosing the sizes and locations of open and closed areas ... none of the existing sites form a suitable replicate, then the CEMP program may have to consider ... augmenting the set of sites. The question of mounting what amounts to an 'experiment' along these lines ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 175–187 : Autor(es): de la Mare, W.K.
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Review of length-weight relationships for Antarctic krill
euphausiid species), are listed for ash-free dry weight, dry weight, and wet weight. The accuracy of length ... taken into account. The influence of seasonal changes on length-weight relationship parameters is ... , because for the spawning season, covariance analyses of length-weight relationships indicated no ... eggs (Siege1, 1989). After the ovaries had recovered and during the winter resting stage there was no ... weight, dry weight, and wet weight. The accuracy of length-weight relationship calculations is improved ... when information on sex and dominant maturity stages is taken into account. The influence of seasonal ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 145–155 : Autor(es): Siegel, V.
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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 ... active sites in the Antarctic Peninsula Integrated Study Region of CEMP (CCAMLR Ecosystem Monitoring ... from about lOOm to the surface in cases when no swarms were detected. A sample from each haul was ... offshore foraging areas, however, krill undertook no diurnal vertical migrations, staying close to the ... 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 : Autor(es): Ichii, T., H. Ishii, J.L. Bengtson, P. Boveng, J.K. Jansen and M. Naganobu
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Antarctic krill and ecosystem management – from Seattle to Siena
/ Description: This paper outlines CCAMLR’s development of a management approach for the Antarctic krill ... (Euphausia superba) fishery and associated ecosystem component between 1984 and 1995. The approach is shown ... 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 ... . Assuming that there is no fl ux results in a conservative estimate of yield (SC-CAMLR, 1994) – the ... remove all krill from down- stream if fl ux was important, but would have no effect if the contrary was ... * Marine and Coastal Management Private Bag X2, Rogge Bay 8012 South Africa *Current Address: CCAMLR, PO ... outlines CCAMLR’s development of a management approach for the Antarctic krill (Euphausia superba) fi ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 175–212 : Autor(es): Miller, D.G.M
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Mitigation of seabird captures during hauling in CCAMLR longline fisheries
exclusion devices (BEDs) placed around the hauling bay. Data collected by scientific observers since 2003 ... swimming or ‘jumping’ into the area around the hauling bay. Based on this analysis, CCAMLR incorporated ... as 1994/95 when steps were taken to reduce the attraction of seabirds to vessels during the hauling ... process. Since 2003, increased efforts have been made to improve the design and performance of bird ... the hauling bay. Based on this analysis, CCAMLR incorporated these two key functional characteristics ... designed to pre- vent/scare seabirds from accessing hooks around the hauling bay was developed in the mid ... fire hose to scare seabirds away from the hauling bay. CCAMLR noted that seabird by-catch around the ... - ment for the use of a ‘device’, no specification for such a device was provided. Consequently, there ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 155–162 : Autor(es): Reid, E., B. Sullivan and J. Clark
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Acoustic estimates of krill density at South Georgia, 1981 to 1998
11 austral summers between 1981 and 1998 are presented. Krill density at the island fluctuated widely ... from year to year over that time, ranging from ≈ 2 to ≈ 150 g m-2 (fresh mass). The 1982, 1991 and ... % confidence limits <15 g m-2). For five of the summers between 1990 and 1998 it was possible to calculate ... density was higher to the east. File: 04brierley-etal.pdf ... , it is perhaps surprising that no similar decline was observed at South Georgia given the ... Georgia during 11 austral summers between 1981 and 1998 are presented. Krill density at the island ... fluctuated widely from year to year over that time, ranging from =2 to =l50 g m-2 (fresh mass). The 1982 ... 95% confidence limits
the summers between 1990 and 1998 it was possible to ... Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 47–57 : Autor(es): Brierley, A.S., J.L. Watkins, C. Goss, M.T. Wilkinson and I. Everson
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Distribution of fish larvae at South Georgia: horizontal, vertical, and temporal distribution and early life history relevant to monitoring year-class strength and recruitment
East Bay the early stages of many species were found throughout the water column. In summer only four ... / Description: Four studies on the early life history stages of Antarctic fish at South Georgia are reported ... . In winter and summer fish larvae and early juveniles were present over the continental shelf and ... abundant near the coast, but rare in oceanic waters. During winter in the 265 m deep fiord of Cumberland ... , but rare in oceanic waters. During winter in the 265 m deep fiord of Cumberland East Bay the early ... specimens per 105 m3 of water filtered, with no discrimination according to depth. The key to abundance ... length is also given; this includes data from a study in the fiord of CUmberland East Bay during 20 ... and in cumberland East Bay at densities of about 2 000 per 105 m3 • The highest catches were not ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 105-141 : Autor(es): North, A.W.
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Alternative methods for determining subarea or local area catch limits for krill in Statistical Area 48
precautionary catch limit on krill (Euphausia superba) in Statistical Area 48. The measure also implies an ... ) the degree to which information on biological relationships is considered; (ii) the cost of data ... collection; (iii) the reliability of required information; (iv) the ease of enforcement; (v) the effects on ... current fishing patterns; and (vi) the potential for delay in implementing the alternative. An alternative ... . The data used to calculate the historical catch distribution are probably reliable. There are no ... measured once, there would be no recurring, long-term data collection costs. The data are also highly ... (Euphausia superba) in Statistical Area 48. The measure also implies an application in future of ... or local area krill catch limits are evaluated relative to six criteria: (i) the degree to which ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 237–249 : Autor(es): Watters, G. and R.P. Hewitt
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Consideration of major issues in ecosystem monitoring and management
/ Description: This paper outlines the requirements of an ecosystem approach to the management of Southern ... Ocean resources and highlights the need for information on harvested and dependent species, their ... interactions and the manner in which their populations vary naturally. Large-scale interactions are catered for ... in the Krill Yield Model (KYM). Smaller-scale interactions centre around three main categories: the ... ., 1994) that indicates reliance on krill. There have been no reported studies on the metabolic rate of ... . The index ranges from It = 0, indicating no spatial overlap during period t, to It = 1, indicating ... foraging in areas local to their breeding site during the breeding season. Outside the breeding season ... constrained by the need to return to a breeding site, they are able to search for food in other localities ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 213–232 : Autor(es): Everson, I
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Target strengths of Antarctic krill (Euphausia superba)
and 120 kHz in a sheltered bay at South Georgia. The results indicate that the Target Strength values ... Paper Title: Target strengths of Antarctic krill (Euphausia superba) Abstract / Description: The ... sheltered bay at South Georgia. The results indicate that the Target Strength values are approximately ... very first encaged-aggregation measurements. 3. MATERIALS 3.2 Experimental Site The primary ... Stromness on South Georgia. The site was protected from the open sea by an island blocking most of the ... harbour mouth. Swell with amplitude up to 0.5 m did pass through, however. The site was subject to ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 265–279 : Autor(es): Everson, I., D.G. Bone, J.L. Watkins and K.G. Foote