Search results
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Directed research. Antarctic Marine Living Resources (AMLR). A program development plan
program providing information needed for US policy regarding the conservation and management of the marine ... in the Commission and Scientific Committee of the Convention for the Conservation of Antarctic Marine Living ... objective relating to the conservation of Antarctic marine living resources. The Antarctic Marine Living ... for the express purpose of providing for the effective conservation of the marine living resources ... the conservation and management of the marine living resources in the ocean areas surrounding Antarctica ... for the Conservation of Antarctic Marine Living Resources (CCAMLR), which established the system for managing ... is aimed at realization of the Convention's objective relating to the conservation of Antarctic marine ... purpose of providing for the effective conservation of the marine living resources of the Antarctic ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 363-373 : Author(s): Office of Science and Technology, NMFS, NOAA, US Department of Commerce (USA)
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Measurements of differences in the target strength of Antarctic krill (Euphausia superba) swarms at 38 kHz and 120 kHz
differences in the mean back-scattering strength of swarms simultaneously insonified at these two frequencies ... and 120 kHz have been inferred from differences in the mean back-scattering strength of swarms ... ) at 38 and 120 kHz have been inferred from differences in the mean back-scattering strength of swarms ... of encaged animals which varied in mean length from 30 to 39 mm. Calculated target strengths at 120 kHz were ... at both frequencies. Back-scatter comparisons, measured in terms of the Mean Surface Back-Scattering ... throughout. The mean difference in MSBS (L\ MSBS), computed by averaging the anti-logs of the L\ MSBS values ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 75–86 : Author(s): Hampton, I.
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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
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 ... 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). A sinusoidal regression model (period = 52 ... 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). A sinusoidal ... during a calibration exercise conducted in Stromness Bay, South Georgia. Mooring data analysis Mean ... –2 (equivalent to a mean Sv of –78 dB over the mean sampled water column, ~192 m) were removed from ...
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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Timing of clutch initiation in Pygoscelis penguins on the Antarctic Peninsula: towards an improved understanding of off-peak census correction factors
etc.). It is found that mean October temperatures constitute the most consistent significant factor ... . temperature, precipitation, sea-ice etc.). It is found that mean October temperatures constitute the most ... that mean October temperatures constitute the most consistent significant factor related to the timing ... ) (CCAMLR, 2004). The logistical difficulties of Antarctic research mean that our understanding of penguin ... - tribution, and the peak of egg laying is the mean (and in practice more usefully, the median) date ... covariate (Table 2) was regressed against mean CID for each site. Temperature, precipitation, Southern ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 149–165 : Author(s): Lynch, H.J., W.F. Fagan, R. Naveen, S.G. Trivelpiece and W.Z. Trivelpiece
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Evidence to support the annual formation of growth zones in otoliths of Antarctic toothfish (Dissostichus mawsoni)
annually in otoliths of juvenile D. mawsoni. Mean fish lengths at ages 0.5, 1.5, 2.5 and 3.5 years were ... . Mean fish lengths at ages 0.5, 1.5, 2.5 and 3.5 years were estimated to be 14, 28, 37 and 46 cm total ... . Mean fi sh lengths at ages 0.5, 1.5, 2.5 and 3.5 years were estimated to be 14, 28, 37 and 46 cm total ... length, estimated age, mean radial measurements to the translucent zones, and otolith weight ... of the translucent zones indicated on the ventral sides. The mean radial measurements could be used to help inter ... 4). There is no overlap between age classes of the ranges of otolith weights. Mean fi sh length by assumed year class ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 125–138 : Author(s): Horn, P.L., C.P. Sutton and A.L. DeVries
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A preliminary assessment of age and growth of Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea, Antarctica
–11.0 and 15.1–15.5 cm. Mean lengths of 4.9 and 7.3 cm (at ages 1.3 and 2.3 years respectively ... -frequency distribution occurred at 7.1–7.5, 10.6–11.0 and 15.1–15.5 cm. Mean lengths ... –11.0 and 15.1–15.5 cm. Mean lengths of 4.9 and 7.3 cm (at ages 1.3 and 2.3 years respectively ... grew disproportionately and became dome shaped. Growth parameters The mean lengthsatage ... classes 6–9 years being the most abundant. Table 1: Mean lengthsatage (standard length in cm ... , with range, standard deviation (SD) and sample size) for fish sampled from the Ross Sea. Age (years) Mean ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 75–86 : Author(s): Sutton, C.P. and P.L. Horn
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Analysis of variability of krill size and fish by-catch in the Japanese krill fishery based on scientific observer data
manner. Therefore, normal distributions were approximated and mean and variance alone were used ... is the mean krill length at subarea j in year i; μ is grand mean of krill length in the whole study area ... prior distribution with a mean of zero and a large variance term (10 000 in this model). αi, βj ... respectively. These parameters were assumed to follow a normal distribution for the prior with a mean of zero ... Paper Title: Analysis of variability of krill size and fish by-catch in the Japanese krill ... variability in the size structure of the krill population, which is presumably derived from large variability ... size of scientific observer data collected on Antarctic krill commercial fishing vessels, the ... Bayesian model. The models were composed of multistage cluster units (i.e. year, subarea, vessel, cruise ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 31–47 : Author(s): Okuda, T. and M. Kiyota
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Interactions of Patagonian toothfish fisheries with killer and sperm whales in the Crozet Islands Exclusive Economic Zone: an assessment of depredation levels and insights on possible mitigation strategies
economIc zone: an assessment of dePredatIon levels and InsIghts on PossIble mItIgatIon strategIes ... is closed in the Kerguelen EEZ because of seabird conservation measures. A fishing season runs from ... is defined as a group of individuals that were seen together on at least 50% of sightings, which means ... in the absence (CPUEabs) and in the presence of cetaceans (CPUEpres) was estimated. This provided a mean loss ... Paper Title: Interactions of Patagonian toothfish fisheries with killer and sperm whales in the ... pods were involved in 81.3% of the interactions. Significant variations of interaction rates with ... % respectively of the 4 289 hauled lines. It was estimated that a total of 571 tonnes (€4.8 million) of ... whales were found to be responsible for the largest part of this loss (>75%), while sperm whales had a ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 179–195 : Author(s): Tixier, P., N. Gasco, G. Duhamel, M. Viviant, M. Authier and C. Guinet
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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
in effect (Conservation Measure 73/XVII; see CCAMLR, 1999). Six scientific trawl surveys have been ... for most hauls during the 1985 survey were very small. Subsequent to this, mean standardised yield per ... all surveys, a comparison of length compositions would not be meaningful and is not presented here ... of recovery in the South Orkney Islands, although stock sizes are now likely to fluctuate around a mean ... Paper Title: Changes in biomass of eight species of finfish around the South Orkney Islands ... Germany in 1985, Spain in 1991 and the USA in 1999. From these surveys, estimates of total stock biomass ... were computed for the eight species of finfish which were most abundant in catches. Biomass levels and ... /90. The biomass of several species of finfish has been monitored through scientific bottom trawl ...
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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Evaluation of the results of trawl selectivity experiments by Poland, Spain and USSR in 1978/79, 1981/82 and 1986/87
experiment is not available. Hauls of three hours or more in the second experiment resulted in the mean ... total catches of 0.6 to 1.0 tonnes. Mean catch rate for C. gunnari was 0.75 tonnes/hf. In the Spanish ... , several hauls over 1.5 tonnes per tow were also noted (Table 1.1 of the Appendix). Mean catch rates ... selectivity experiments resemble those of the commercial fishery. The mean CPUE range observed from 1984 ... Paper Title: Evaluation of the results of trawl selectivity experiments by Poland, Spain and USSR ... in 1978/79, 1981/82 and 1986/87 Abstract / Description: Trawl selectivity for several species of ... selectivity experiments in Statistical Area 48 in 1978/79, 1981/82 and 1986/87 seasons. These data comprise ... different characteristics of experimental codends, length frequency distribution of stocks sampled, catch ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 163–196 : Author(s): Slosarczyk, W., E. Balguerias, K. Shust and S. Iglesias