Search results
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Utilising data from ecosystem monitoring for managing fisheries: development of statistical summaries of indices arising from the CCAMLR Ecosystem Monitoring Program
missing each year (i.e. phasing in new parameters or phasing out old ones). In these circumstances ... with mean p and standard deviation o. The two sets of trials consist of one in which the value of is fixed ... ~T~X pa3AeneHa Ha 4 OCHOBH~IX Y~CTM. n e p ~ a n YacTb AaeT onHcaHMe npeAnaraeMoro MeToAa pacveTa CYMMaPHbIX ... with features of the physical environment. One of the tasks of the CCAMLR With regard to (i), the approach so ... indices, which is based on the usual theory of multivariate statistics and takes into account the ... covariance between parameters. The second part reports on a Monte Carlo simulation study that examines the ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 101–117 : Author(s): de la Mare, W.K. and A.J. Constable
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Food and feeding of the mackerel icefish (Champsocephalus gunnari) around South Georgia in January/February 1991
1991 was one of the lowest within the 16-year period of observation (Figure 3). A lower krill index ... by one of us (K.-H. Kock) in 3 877 fish which were randomly collected on 44 out of 87 stations sampled ... .%), myctophids (Electrona sp., Gymnoscopelus sp.) (1.8%), early life stages of fish (C. gunnari primarily age ... . (Due to the occurrence of several items in one stomach, percentages may add up to more than 100 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 15–23 : Author(s): Kock, K.-H., I. Everson, S. Campbell, G. Parkes, Z. Cielniaszek and J. Szlakowski
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Assessments of by-catch in trawl fisheries at Heard and McDonald Islands
species of up to 100 kg in any one haul and (iii) changing fishing grounds if the catch of any one ... species of up to 100 kg in any one haul and (iii) changing fishing grounds if the catch of any one ... catches of target species were taken, indicating that CCAMLR039;s 1996 by-catch rules need revising ... the total by-catch in a year to the estimates of long-term annual yield, (ii) allowing catches of by-catch ... and, by these estimates, less than 8 years old. The maximum age is uncertain because it is currently based ... for this species was assumed to include fish of ages 12 years and above. Values of L, and K in a von Bertalanffy ... 8 years of age. This was used as the age of first maturity for skates at Heard Island. Family Species ... 0.356 0.212 0.529 1 1 001 l 001 1 0 20 0.2 imated since the Parameter Minimum age ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 231–243 : Author(s): Constable, A.J., R. Williams and W.K. de la Mare
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Seabird by-catch by autoline vessels: do line setters increase the sink rate of integrated weight longlines?
autoline vessels and one Spanish-system vessel operate in these fisheries (SC-CAMLR, 2006 ... amounted to about 100 s of setting time (at 6 knots 3.1 m s–1), was chosen to ensure the sink rate of one ... if operational difficulties with the line setter prevented one or both members of a pair from being set ... to demonstrate a dif- ference in the sink rate of UW longlines deployed with and without a line setter. One ... the sink rates of IW longlines. Time-depth recorders were deployed on lines set with and without a ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 107–114 : Author(s): Robertson, G., J. Williamson, M. McNeill, S.G. Candy and N. Smith
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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 ... indicated ‘poor’ krill years. The 1994 (JR06) value, for example, was one of the lowest acoustic estimates ... to be able to assert that the year in question was one of atypi- cally low krill abundance from ... , 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 ...
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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Marine debris and fishing gear associated with seabirds at sub-Antarctic Marion island, 1996/97 and 1997/98: in relation to longline fishing activity
, while five seabird carcasses (three wandering albatross chicks, one white-chinned petrel chick ... found entangled in fishing gear, while five seabird carcasses (three wandering albatross chicks, one ... and the 1997/98 field seasons. Fishing gear increased at a rate 10 times higher than 039;other039; (non ... -fishing) marine debris over this period. Sixty 039;rope nooses039; apparently used for suspending ... entangled with two toothfish hooks attached to each other by a single piece of monofilament nylon. One ... an estimated total volume of 150 cm? Three carcasses (two wandering albatross chicks and one southern giant ... records of two hooks (of different ages) at a single nest indicate that certain breeding adults may ... carcasses (three wandering albatross chicks, one white-chinned petrel chick and a southern giant petrel ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 85–96 : Author(s): Nel, D.C. and J.L. Nel
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Quantification of Southern Ocean phytoplankton biomass and primary productivity via satellite observations and biogeochemical models (submitted to the 2008 Joint CCAMLR-IWC Workshop)
, the marginal ice zone and open-ocean fronts. Their one-year time series of productivity confirmed that while ... number they calculated (based only on one year of data, 1997/98) was in their combined Weddell– Ross Sea ... is one of the stated goals of NASA’s Ocean Biology and Biogeochemistry Program. In general, ocean ... , temperature, nutrients (nitrate or silicic acid) and chlorophyll. One of the most significant differences ... productivity is presented, focusing on the vertically generalised production model (VGPM) and more recent ... biogeochemical models for the Southern Ocean is presented, with a focus on those models that have been validated ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 247–265 : Author(s): P.G. Strutton, N.S. Lovenduski, M. Mongin and R. Matear
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Statistical power to detect changes in growth rates of Antarctic fur seal pups
changes (between years) in pup growth rates, the loss of power associated with obtaining weight samples ... (60°59.5039;S, 55°24.5039;W), the simulations suggest that following the protocol of the Standard ... years) in pup growth rates, the loss of power associated with obtaining weight samples on only three ... ) , I'on pourrait deceler un changement de 17% dans le tau x de croissance, avec 10% de chances de ... commettre des erreurs de type 1 ou 2. Si I'on n'obtient que trois echantillons (50 jeunes, a intervalle de ... ~onYII\eHH5I norpemHocTH THna 1 HJIH 2. llPH nOJIY4eHHH JIHmb 3 npo6 (50 II\eHKOB B Ka)K~OH ... ------- ------- Females ------- mean mean Date n weight (kg) s.d. n weight (kg) s.d. 1988: 2 Jan 30 9.91 1.60 20 8.78 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 399–409 : Author(s): Boveng, P., J.L. Bengtson and M.E. Goebel
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Effect of line sink rate on albatross mortality in the Patagonian toothfish longline fishery
/s. At this rate the CFL Pioneer set 10 800 hooks (eight magazines) in about one hour. Bait used was squid (Illex ... line. The line entered the water as a heavy duty hauling (mother) line on one side of the vessel ... was squid (Illex spp.) cut into 50-70 mm blocks (three baits from one squid, bait weight: 60 g). Bait ... ., 1994), the depth (8 m) that exceeds by one dive recorder increment the maximum known diving depth ... Paper Title: Effect of line sink rate on albatross mortality in the Patagonian toothfish longline ... fishery Abstract / Description: An experiment was conducted on autoline and Spanish-system longline ... based on knowledge of line sink rates and albatross diving abilities. Sink rates of lines deployed into ... weights distributed every 40 m on longlines. File: 08robertson.pdf ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 133–150 : Author(s): Robertson, G.G
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Significant intra-annual variability in krill distribution and abundance at South Georgia revealed by multiple acoustic surveys during 2000/01
surveys in one season would provide information on short-term variability that could be used to set data ... that conducting several surveys in one season would provide information on short-term variability that could ... ), and in March 2001 (late-season). The surveys were the first in a newly planned five-year series of observations ... with observations from previous years, krill density in the western box in the mid-season survey was less than ... 95% confi dence limit fell below about 15 g m-2 in any year, that year could be considered one ... 1980s). We hoped that conducting several surveys in one season would provide information on short-term ... became 133.33 km wide with eight transects, a mean transect effort of one per 16.66 km survey box width ... ) such that the fi ve transects we were to run would also be at a mean density of one per 16.66 km. A new central ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 71–82 : Author(s): Brierley, A.S., C. Goss, S.A. Grant, J.L. Watkins, K. Reid, M. Belchier, I. Everson, M.J. Jessop, V. Afanasyev and J. Robst