Search results
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Areal and seasonal extent of sea-ice cover off the northwestern side of the Antarctic Peninsula: 1979 to 1996
images of sea-ice cover. Areal and Seasonal Extent of Sea-ice Cover 1980 1979-95 mean 1989 ... Month Figure 2: Annual curves of sea-ice cover for 1980,1989 and 1979-96 mean 1979 1980 1981 1982 ... in the mean monthly ice cover for the subsampled area used in this study (Figure 2). Stammerjohn and Smith ... by numerical integration of annual curves similar to Figure 2. Dotted line indicates mean value. Area1 ... four periods of extensive ice cover during the last 18 years. Variability in seasonal timing, areal ... . Periods of extensive winter ice cover peaked in 1980, 1986, 1991and 1995 and were foreshadowed by the late ... production, particularly the reproductive success of Antarctic krill, in the Antarctic Peninsula area. File ... Paper Title: Areal and seasonal extent of sea-ice cover off the northwestern side of the ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 65–73 : Author(s): Hewitt, R
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Revised estimates of the area of the South Georgia and Shag Rocks shelf (CCAMLR Subarea 48.3)
Paper Title: Revised estimates of the area of the South Georgia and Shag Rocks shelf (CCAMLR ... , the reliability of existing sea floor area estimates was found to vary spatially and between different ... should be used for future assessments and for assisting with the stratification of surveys. File ... variety of primary sources including multi-beam swath bathymetry. Sea floor area (km 2 <500 m depth ... Belchier and Fretwell 168 introduction The area of sea floor within different depth strata in the South ... limited sounding data, with some dating from the 1920s. Updated estimates of the sea floor in Subarea ... dataset. These data were only used in the northeast of the region where the single-beam coverage is ... degree) and converted to points to ensure equal weighting of datasets. The TOPOGRID function in ArcGis ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 167–175 : Author(s): Belchier, M. and P. Fretwell
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Defining smaller-scale management units to further develop the ecosystem approach in managing large-scale pelagic krill fisheries in Antarctica
of predators, distribution of colonies and foraging range) will provide a means of circumscribing predator ... a means of circumscribing predator units as well as undertaking an assessment of long-term annual yield ... , distribution of colonies and foraging range) will provide a means of circumscribing predator units as well ... , distribution of colonies and general foraging range) will provide the means for circumscribing smaller-scale ... , D.J. Agnew, I. Everson and D. Miller. 2000. Managing fi sheries to conserve the Antarctic marine ... eco- system: practical implementation of the Convention on the Conservation of Antarctic Marine ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 117–131 : Author(s): Constable, A.J. and S. Nicol
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Fishing ground selection in the Antarctic krill fishery: trends in patterns across years, seasons and nations
of Conservation Measures in Force 2005/06. CCAMLR, Hobart, Australia: 174 pp. Everson, I. and C. Goss. 1991 ... Paper Title: Fishing ground selection in the Antarctic krill fishery: trends in patterns across ... contributors to the total catch. A recent shift in operational timing towards later months within fishing ... remained relatively constant in Subareas 48.2 (March–May) and 48.3 (June–August). In 25 years of krill ... operations in Area 48, patterns of SSMU usage have changed. Three different patterns of seasonal SSMU ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 117–141 : Author(s): Kawaguchi, S., S. Nicol, K. Taki and M. Naganobu
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The biology, ecology and development of fishery management advice for the anomuran crabs at South Georgia (CCAMLR Subarea 48.3)
body parts as a result of continual ecdysis means there are no structures present, analogous ... are immediately fertilised externally as there is no means of sperm storage. Moulting (and therefore mating ... effect of the parasite is to castrate the host crab, meaning they are no longer part of the spawning ... estimates of conservative catch levels for the stock of P. spinosissima were attempted, recognising ... of the development of a management regime for them. Finally it aims to highlight areas in which ... assessment and management methods in light of continuing interest in the regional crab fishery. Considerable ... gaps in our knowledge of the biology, ecology and demography of the lithodid species at South Georgia ... of the targeted species. In addition, there is doubt surrounding the identification of the less ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 1–15 : Author(s): Belchier, M., T. Peatman and J. Brown
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Analysis of albatross and petrel distribution within the CCAMLR Convention Area: results from the Global Procellariiform Tracking Database
for conservation applications, BirdLife International convened an evaluation workshop in South Africa in 2003 ... tracking data correspond only to the closed period (Table 4), meaning that results from such an analy- sis ... for the Conservation of Southern Bluefin Tuna (CCSBT), the International Commission for the Conservation of Atlantic ... of Conservation New Zealand, David Bell, Hans Rook. Northern royal albatross (New Zealand): C.J.R. Robertson ... successful measures to reduce the incidental mortality of seabirds in most of the fisheries within its ... comprehensive assessment of risks of incidental mortality for albatrosses and petrels foraging in the Convention ... Paper Title: Analysis of albatross and petrel distribution within the CCAMLR Convention Area ... , unreported and unregulated (IUU) fishing. This paper presents an analysis of the distribution of albatrosses ...
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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Seabird by-catch by autoline vessels: do line setters increase the sink rate of integrated weight longlines?
sea conditions. Line setters are not equipped with a governor, meaning that the longline deployment ... the water Table 1: Mean times taken for longlines to reach target depths when set with and without ... the line setter (treatment). The average standard error of the means, and the average standard error ... of the difference between the treatment means, were 0.8 s and 1.1 s respectively. Treatment Target depths ... . A trial was conducted in the Ross Sea to determine the effectiveness of line setters in increasing ... were identical, including in the first few metres of the water column where seabird interactions are ... Paper Title: Seabird by-catch by autoline vessels: do line setters increase the sink rate of ... m –1 lead core) longlines by some autoline vessels in the Kerguelen and Crozet Islands Patagonian ...
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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Age estimation and maturity of the ridge-scaled macrourid (Macrourus whitsoni) from the Ross Sea
and t 0 –0.159 for males and L ∞ 92.03, K 0.055 and t 0 0.159 for females. Revised estimates of the mean total ... length-at-maturity (38.8 and 46.4 cm) and mean age-at-maturity (10.6 and 13.6 years) are presented ... and L∞ 92.03, K 0.055 and t0 0.159 for females. Revised estimates of the mean total length-at-maturity ... (38.8 and 46.4 cm) and mean age-at-maturity (10.6 and 13.6 years) are presented for males and females ... . Revised estimates of the mean total length-at- maturity (38.8 and 46.4 cm) and mean age-at-maturity (10.6 ... ), and mean coefficient of variation (CV) (Chang, 1982), were calculated and bias plots drawn for each test ... within the Ross Sea. This means that they are directly comparable to specimens collected by observers ... comparisons for the 2004 data The IAPE and mean CV for the between-reader test were 9.55 and 13.51 ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 291–303 : Author(s): Marriott, P.M., M.J. Manning and P.L. Horn
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On the power to detect changes using the standard methods for monitoring parameters of predatory species
,llOBaHHH, He,llOCTa TOll HO ~JI5I BbInOJIHeHH5I aHaJIH3a MO~HOCTH (Bec nHHrBHHOB no npH6bITHH ... deviation (5) if 0 is in the same units as the mean, or the coefficient of variation (cv) if 0 is expressed ... as a percentage of the typical mean value. The analysis described in CCAMLR (1989) provides information about ... the power to distinguish between the mean values of parameters obtained in two or more years. We may also ... of predatory species Abstract / Description: The CCAMLR guidelines (CCAMLR, 1989) for analyzing the ... trip duration (C2.0). The other Standard Methods are not evaluated because the power analysis in the ... of the power of Standard Methods A3.1, A5.1, C1.0, and C2.0 are proposed. File: 22-Boveng-and ... Paper Title: On the power to detect changes using the standard methods for monitoring parameters ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 377–397 : Author(s): Boveng, P. and J.L. Bengtson
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Status of the FIBEX acoustic data from the West Atlantic
for the Conservation of Antarctic Marine Living Resources (CCAMLR) set a precautionary catch limit for Antarctic ... krill in Statistical Area 48 (Conservation Measure 32/X). This limit was based on calculations ... of survey area - one for each cruise (Figure 1); frequency distributions of Mean Volume Backscattering ... these reservations, an alternative means of determining a 50 kHz TS estimate would be preferable. One alternative ... Paper Title: Status of the FIBEX acoustic data from the West Atlantic Abstract / Description ... : Data from the FIBEX acoustic survey in the West Atlantic sector have been re-examined to check the ... consistency between the results from four of the vessels, Itzumi, Dr Eduardo L. Holmberg, Odissey and Walther ... Herwig. While there is an error factor due to the combination of data collected at 50 kHz (Walther Herwig ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 35–48 : Author(s): Trathan, P.N. and I. Everson