Search results
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Distribution and size–age composition of Antarctic krill (Euphausia superba) in the South Orkney Islands region (CCAMLR Subarea 48.2).
25–30 mm) and 2-year-old krill (age 2+; modal length 40–45 mm); the 3-, 4- and 5-year-old krill age ... 0 –10 –20 –30 29–30 31–32 33–34 35–36 37–38 39–40 41–42 43–44 45–46 47–48 49–50 51–52 53 ... % 70 % 60 % 50 % 40 % 30 % 20 % 10 % 0% 10 0% 90 % 80 % 70 % 60 % 50 % 40 % 30 % 20 % 10 ... % 0% 10 0% 90 % 80 % 70 % 60 % 50 % 40 % 30 % 20 % 10 % 0% 10 0% 90 % 80 % 70 % 60 % 50 % 40 ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 123–134 : Author(s): Sologub, D.O. and A.V. Remeslo
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Fish stock assessment survey in Subarea 48.3
of positions of hauls, catch rates and size composition of catches. The standing stock of one of the most ... are given of positions of hauls, catch rates and size composition of catches. The standing stock of one ... fishing were seen either at South Georgia or Shag Rocks. The two largest catches, one of 696 kg at Shag ... the previous year and is not an artefact of the sampling technique or survey design. 30 Further evidence ... deg min deg min m min 1 22 1 6 13 53 19.80 42 44.30 463 27 2 22 1 10 10 53 28.40 42 18.20 232 30 ... 3 22 1 14 20 53 26.00 41 48.00 146 29 4 22 1 18 50 53 37.00 42 7.00 168 30 5 23 1 4 23 53 33.50 41 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 25–67 : Author(s): Everson, I., G. Parkes, K.-H. Kock, S. Campbell, Z. Cielniaszek and J. Szlakowski
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Age and growth of the Antarctic skate (Amblyraja georgiana) in the Ross Sea
not been validated. The maximum estimated age was 14 years, but this should be regarded as a conservative ... L t is the pelvic length (PL) in centimetres at age t years. Applying this growth curve to the estimated lengths ... of 6–7 years for males and 8–11 years for females. These estimates are near the middle to upper end ... not been validated. The maximum estimated age was 14 years, but this should be regarded as a conservative ... , the curve without the outliers was implausible, intersecting the x-axis at about one year. Thus ... validated. The maximum estimated age was 14 years, but this should be regarded as a conservative estimate ... (PL) in centimetres at age t years. Applying this growth curve to the estimated lengths at maturity ... for males and females (64 and 66–69 cm PL respectively) produced estimated ages at maturity of 6–7 years ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 183–194 : Author(s): Francis, M.P. and C. Ó Maolagáin
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CCAMLR ecosystem monitoring and a feedback management procedure for krill
. r JIaBHbIM npOMbICJIOM B 30He .lleHCTBH5I KOHBeHIJ,HH AHTKOM 51BJI5IeTC5I npOMbICeJI KPHJI5I. B HaCT05lIQeH ... pa60Te paCCMaTpHBaeTC5I KaKHM 06pa30M MO:>KHO BKJIIOlIHTb B CTpaTeiHIO ynpaBJIeHH5I 3THM npOMbICJIOM ... on options in Article IX of the CCAMLR Convention and dictated by the management procedure (see de la Mare ... that the objectives set out in Article IT of the CCAMLR Convention are not contravened. 346 3. APPROACHES ... Paper Title: CCAMLR ecosystem monitoring and a feedback management procedure for krill Abstract ... Ecosystem Monitoring Program might be incorporated into a feedback management strategy for this fishery ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 345–350 : Author(s): Constable, A.J.
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Changes in biomass of eight species of finfish around the South Orkney Islands (Subarea 48.2) from three bottom trawl surveys
the South Orkney Islands (Subarea 48.2) suffered substantial declines from split-year 1977/78 to 1989/90 ... declines from split-year 1977/78 to 1989/90. The biomass of several species of finfish has been monitored ... abundance of a species is always increasing when one or two strong year classes are passing through ... (Kock, 1991). Both cohorts were largely exhausted within two years, and overall catches declined ... by almost two orders of magnitude within a few years (Figure 1). Catches increased slightly in the mid ... . The target time for a haul was 30 minutes, with any haul less than 20 minutes considered invalid ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 53–74 : Author(s): Jones, C.D., K.-H. Kock and E. Balguerías
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Analysis and modelling of the Soviet Southern Ocean krill fleet, II: Estimating the number of concentrations and analytical justification for search data
and one degree of longitude is assumed to be 30 nm. Figures 6 to 9 show the results of the application ... (8-9) 1 290.4 50" 40' 20" o' 20' 40' 10' 30' 30' 10" 50" 60" 60' 70' 10' 58.4.4 -.' eo' 58.4.2 ... 4.-----------------~--------------------~ 3 2 o 5 10 15 20 30 40 50 60 70 Concentration Radius (nml) Figure 16: Histogram of the radii ... conclusions precises. Pe3lOMe B HacTo.sn~eH pa60Te MHOIO nOKa3aHO, KaKHM 06pa30M ,llaHHble, KOTopble ... number of concentrations and analytical justification for search data Abstract / Description: In this ... 1980s. These examples highlight the need for a navigational log as well as a fishing log in order to ... make accurate inferences. In the appendix, a method for correcting for the bias in the detection of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 283–322 : Author(s): Mangel, M.
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Intra-annual variability in the density of Antarctic krill (Euphausia superba) at South Georgia, 2002–2005: within-year variation provides a new framework for interpreting previous ‘annual’ estimates of krill density
) at South Georgia, 2002–2005: within-year variation provides a new framework for interpreting previous ... all three years, was detected. Krill densities in winter were predominantly low (mean = 18.7 ... g m –2, SD = 24.3), but had risen substantially by summer in each year (mean = 89.5 g m –2, SD = 64.2 ... to explore whether high-frequency temporal variation (i.e. within-year) could have led to the perceived ... , CCAMLR Saunders et al. 30 summer) in the light of repeated observations of within-year changes ... 30 0 19 6 30 –1 82 × 13 00 20 3 20 –1 89 × 2 19 / 02 –2 8/ 04 / 03 30 0 19 8 32 –1 84 ... 7 21 –2 13 × 5 14 / 01 –2 4/ 03 / 04 30 0 19 8 32 –1 84 × 13 00 22 6 20 –2 12 × 6 26 ... on 20/11/04 44.2 (157) –42.76 JR116 06/01–10/01/05 06/01–10/01/05 57.1 (144) –44.92 JR121 30/03–02/04 ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 27–41 : Author(s): Saunders, R.A., A.S. Brierley, J.L. Watkins, K. Reid, E.J. Murphy, P. Enderlein and D.G. Bone
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The CCAMLR-2000 Krill Synoptic Survey: a description of the rationale and design
of krill which are used in models to estimate sustainable yield in Area 48. The survey design includes two ... large-scale oceanic strata: one in the southwest Atlantic located in the Scotia Sea, and the other ... . Full analysis of the results of the CCAMLR-2000 Survey will take several years and will result ... in models to estimate sustainable yield in Area 48. The survey design includes two large-scale oceanic ... sustainable yield in Area 48. The survey design includes two large-scale oceanic strata: one in the southwest ... ; and that six hours per day would be required to sample two stations, one station would be sampled around ... analysis of the results of the CCAMLR-2000 Survey will take several years and will result in a significant ... 7OHbI: OAHY - Ha FOrO-?anaQe A T ~ ~ H T I . ~ ~ ~ c K O ~ O OKeaHa (B Mope CKOTHR), M ApyryFO ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 1–23 : Author(s): Trathan, P.N., J.L. Watkins, A.W.A. Murray, A.S. Brierley, I. Everson, C. Goss, J. Priddle, K. Reid, P. Ward, R. Hewitt, D. Demer, M. Naganobu, S. Kawaguchi, V. Sushin, S.M. Kasatkina, S. Hedley, S. Kim and T. Pauly
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Analysis of albatross and petrel distribution within the CCAMLR Convention Area: results from the Global Procellariiform Tracking Database
two colonies, together rep- resenting <1% of the population of this species, and for this reason ... AnAlysis of AlbAtross And petrel distribution within the CCAMlr Convention AreA: results froM the GlobAl ... . If the interval between two uplinks was more than 24 hours, no resampling was conducted between these points ... for the estimation of distribution during the breeding season for all 20 albatross, petrel and shearwater species ... , unreported and unregulated (IUU) fishing. This paper presents an analysis of the distribution of albatrosses ... subdivisions, based on remote-tracking data contributed to the Global Procellariiform Tracking Database by ... multiple data holders. The results highlight the importance of the Convention Area, particularly for ... importance for breeding albatrosses and petrels of regions north of the CCAMLR boundaries, particularly ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 143–174 : Author(s): BirdLife International (prepared by C. Small and F. Taylor)
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A generalised model for evaluating yield and the long-term status of fish stocks under conditions of uncertainty
(a) 1.21 I 0 10 20 30 40 50 60 Length (mm) Selectivity (b) 1.6 1 1 0 2 4 6 Age (years) Relative ... of Uncertainty (a) Run 1 Biomass (thousand tonnes) Recruits (millions) 0 10 20 30 40 50 Years (b) Run ... cohort being calculated by numerical integration over a one-year period. The model is initialised ... is projected through one year by numerical integration of the basic population differential equations. Catch ... known catch history and thus allow assessments of yield to be made for existing fisheries. An example is ... Paper Title: A generalised model for evaluating yield and the long-term status of fish stocks ... projection model for assessing the long-term annual yield which satisfies objectives for the maintenance of ... the spawning stock biomass in accordance with CCAMLR criteria. These specify a bound on the ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 31–54 : Author(s): Constable, A. and W.K. de la Mare