Search results
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Estimating the impact of depredation by killer whales and sperm whales on longline fishing for toothfish (Dissostichus eleginoides) around South Georgia
= 0.0003), although the pod size appears to be lower in the middle of the fishing sea- son (Figure ... . Estimates of food consumption by marine mammals in the Eastern Bering Sea. US Dep. Commer., NOAA Tech ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 163–178 : Author(s): Moir Clark, J. and D.J. Agnew
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Spatially explicit population dynamics models for Antarctic toothfish in the Ross Sea region
. These biomass and abundance plots should be regarded as relative population dis- tribution plots because ... to the north, with smaller fish dis- tributed on the shelf, larger fish on the slope and spawning fish ... methods (Chapman and Robson, 1960; Hoenig, 1983; Punt et al., 2005), and adopted by CCAMLR for use ...
Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 19–37 : Author(s): Mormede, S., A. Dunn, S. Hanchet and S. Parker
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Food consumption by predators in a CCAMLR integrated study region
travelling (e.g., feeding or resting). If the travel speed is v m S-l and proportion of the trip spent ... ). A foraging trip is defined here as the time between feeds, and is calculated from the feeding frequency ... ., proportion of a foraging trip spent on water for flying birds, or on land for penguins) Blank Foraging ... on known foraging trip durations) estimation of meal size is currently difficult because it requires ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 489–519 : Author(s): Croxall, J.P., C. Ricketts and A.G. Wood
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Target strengths of Antarctic krill (Euphausia superba)
and Nakken 1972, Johannesson and Mitson 1983), knowledge of the target strength is essential. The problem ... estimation: a practical guide. ICES Coop. Res. Rep., 144: 69 pp. FORBES, S.T. and O. NAKKEN. 1972. Manual ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 265–279 : Author(s): Everson, I., D.G. Bone, J.L. Watkins and K.G. Foote
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A stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea Region incorporating multi-year mark-recapture data
. 2008. A hypo- thetical life cycle for Antarctic toothfish (Dis- sostichus mawsoni) in the Ross Sea ... . Gaffney. 2008. Population subdivision in the Antarctic toothfish (Dis- sostichus mawsoni) revealed ... , S. and P.J. Grimes. 2010. Length- and age-at-spawning of Antarctic toothfish (Dis- sostichus mawsoni ... rates were excluded from the model. As a result, the use of the ‘selected’ trips dataset results ...
Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 39–62 : Author(s): Mormede, S., A. Dunn and S.M. Hanchet
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A composite recruitment index to describe interannual changes in the population structure of Antarctic krill at South Georgia
from both the eastern and western ends of South Georgia were selected for further analysis by Watkins ... for the eastern and western survey areas carried out during the Core Programme (see Figure 1). Using ... ., 1997 and in press) shows that this is frequently the case, especially within the area of the eastern ... were only found in offshore waters at the eastern end of the island. The calculation of recruitment ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 71–84 : Author(s): Watkins, J.L
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Quantifying vessel performance in the CCAMLR tagging program: spatially and temporally controlled measures of tag-detection rates
time by applying the method to the annual fishing trips for each vessel. methods Initially, the case ... is defined as an individual vessel, but the analysis is later extended to vessel- season (trip ... between 15 January and 28 February. Each vessel is assigned a unique trip number for each season, which ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 73–80 : Author(s): Mormede, S. and A. Dunn
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The utilization of seabird censuses for krill monitoring
the projections on the directions of eigenvectors. Contour Plotting This method is due to Andrews (1972 ... . References Andrews, D.F., 1972. Plots of high-dimensional data. Biometrics vol. 28, pp 125-36. Geisser ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 393-425 : Author(s): Marschoff, E.R., J.G. Visbeek and L.R. Fontana
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Estimation of natural mortality for the Patagonian toothfish at Heard and McDonald Islands using catch-at-age and aged mark-recapture data from the main trawl ground
died out through natural mortality; (ii) it has been fished out; and (iii) it has been subject ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 29–45 : Author(s): Candy, S.G., D.C. Welsford, T. Lamb, J.J. Verdouw and J.J. Hutchins
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A statistical method for estimating the level of IUU fishing: application to CCAMLR Subarea 48.3
of days fi shing for the IUU cruise1 detected by an FPV, i, in year y, Di,y, was thus calculated from FPV ... encounters with IUU vessels as: Di,y = Li,y – Ei,y (1) where L is the latest and E is the earliest date ... shing, then Ai,y = pa,y Di,y (2) where p is the correction factor used to convert IUU days fi shing ... distributions of IUU trip length. Estimates of p derived from these runs (i.e. for sightings in 1998, 1999 ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 119–141 : Author(s): Agnew, D.J. and G.P. Kirkwood