Search results
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Preliminary model of krill fishery behaviour in Subarea 48.1
and Elephant Islands in alternate years would result in an average yearly catch similar to that at present ... during alternate years. File: 06agnew-marin.pdf ... and Elephant Islands in alternate years would result in an average yearly catch similar to that at present ... during alternate years. ... and Elephant Islands in alternate years would result in an average yearly catch similar to that at present ... predators during alternate years. Resume Description d'un modele simple du comportement de la pecherie ... , steaming or lost to bad weather, was 89.6 hours per vessel per 10-day period (number of 10-day-periods ... , in alternate years. Closures were modelled by manipulating the amount of time available to be spent ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 71–79 : Author(s): Agnew, D.J. and V.H. Marín
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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 ... (Subarea 48.2) suffered substantial declines from split-year 1977/78 to 1989/90. The biomass of several ... ~zocepkalt~s acerafus, Dissostickzls eleginoides and unspecified finfish species. The first year of fishing ... (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 ...
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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Length-at-age in juvenile Patagonian toothfish (Dissostichus eleginoides)
to be from fish 1+ or 2+ years old, with mean total lengths of 32.5 cm and 41.3 cm respectively ... in the length density represent different age cohorts separated by one year. File: 01ashford.pdf ... 1+ or 2+ years old, with mean total lengths of 32.5 cm and 41.3 cm respectively. No difference was found between ... represent different age cohorts separated by one year. ... of the otoliths (83.6%) were estimated to be from fi sh 1+ or 2+ years old, with mean total lengths of 32.5 cm ... year. Résumé À partir des otolithes d’un échantillon de pré-recrues de Dissostichus eleginoides dont ... , соответствуют различным возрастным когортам с разницей в 1 год. 2 INTRODUCTION In recent years a fi shery ... to represent year classes in previous assessments. In this study we have used the otoliths from these fi sh ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 1–10 : Author(s): Ashford, J., C. Jones, S. Bobko and I. Everson
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Preliminary results of research activities of RV Evrika in the Scotia Sea in January-March 1988
from the Weddell Sea penetrated the eastern part of the area from the east and were characterized ... the South Georgia (see Figure 9). Mature crustaceans distributed over the eastern part of the surveyed area ... will be available later. 217 t-.) f-' \0 .. > ". I. m~ "0.' '.', .' Z3 ... Sea and adjacent waters, accompanied by regular trawlings with an Isaac-Kidd trawl. The waters off ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 215-229 : Author(s): Maklygin, L.I., A.S. Fedorov, V.N. Shnar, Yu.A. Shulyakovsky, I.V. Krasovsky, Yu.D. Shuvaev and A.V. Kromsky
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Use of the Leslie stock depletion model for the assessment of local abundance of Patagonian toothfish (Dissostichus eleginoides)
is difficult to assess, particularly in the early years of the fishery when information is sparse ... include a lack of detailed data from the early years of the fishery, differences in catchability between ... from the former Soviet Union dominated the fishery for the first three years. Since the start ... and adjacent waters. These estimates were, in some years, substantially different from the reported catch ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 55–77 : Author(s): Parkes, G., C.A. Moreno, G. Pilling and Z. Young
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Indices of prey availability near the Seal Island CEMP site: 1990 to 1996
surveys each year were subsampled to include the foraging range of predators breeding at Seal Island ... biomass of juvenile krill near Seal Island during the first survey of each year as compared to the biomass ... of post-spawning adults near Seal Island during the second survey of each year. It is hoped ... each year were subsampled to include the foraging range of predators breeding at Seal Island. Indices ... and are later displaced by spawning adults. Variation of prey density between surveys within a year thus ... Seal Island, and persistence over time. Acoustic data from two AMLR surveys each year were subsampled ... of juvenile krill near Seal Island during the first survey of each year as compared to the biomass of post ... -spawning adults near Seal Island during the second survey of each year. It is hoped that these indices may ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 37–45 : Author(s): Hewitt, R.P., G. Watters and D.A. Demer
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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 ... . Target strength (TS) and krill length-frequency estimation The Demer and Conti (2005) stochastic dis ... by the sampling dis- tance for each day: this is equivalent to the Jolly and Hampton (1990) method ... . Furthermore, the reliability of the WCPs was dis- appointing: both the on-shelf and off-shelf instru- ments ... ) AT SOUTH GEORGIA, 2002–2005: WITHIN-YEAR VARIATION PROVIDES A NEW FRAMEWORK FOR INTERPRETING PREVIOUS ...
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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Research currently being undertaken by the Republic of South Africa on "dependent and related species" within the Antarctic marine ecosystem
t:OfflPreh_ensive collectio11,e; of suitable ref1Uel'1t1P. rrr.!!te:r-la!, ,-artic:u!ar-1::,1 the let-5!. di ... ~,e,nch Institut(? of the Universit~ of' Pretoria SP@nd UF' to three mont.h~; each Year in the Antarctic ... !IF./ t,i..~ond the i:(:)ntil'lll!'!'ltjll adh, F'ii!la!51lt -seab,jp,:'lf:; c.an I ive for man!I i,,onlhs far ... functionin9 of eco5~stem5, The continued Possibi I it~ for exPloi- tat l on t"!~ man of renewable natural ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 59-77 : Author(s): South Africa
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Comparison of age readings from scales and otoliths of the Patagonian toothfish (Dissostichus eleginoides) from South Georgia
years. This is very close to the maximum age of 22.8 years calculated from Taylor's formulae which ... . The maximum age of D. eleginoides was found to be 24 years. This is very close to the maximum age of 22.8 ... years calculated from Taylor's formulae which relates maximum observed age to natural mortality ... L, = 207.01 cm, K = +0.0748 and to = -0.2898. The maximum age of D. eleginoides was found to be 24 years ... . This is very close to the maximum age of 22.8 years calculated from Taylor's formulae which relates maximum ... total length (TL) (9-10 years) in most fish, although a few mature males smaller than 80 cm TL (Gon ... that otoliths grow longitudinally for about seven years, followed by a period when an increase in thickness ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 191–203 : Author(s): Cassia, M.C
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Seasonal and inter-annual variability in the distribution of Electrona carlsbergi in the southern Polar Front area (the area to the north of South Georgia is used as an example)
concentrations throughout the year. Results of surveys showed that the distribution and behaviour ... of biomass of E. carlsbergi in the area indicated that its variability during the year is related ... to form large concentrations throughout the year. Results of surveys showed that the distribution ... the year is related to parameters of spatial and vertical distribution of fish. Interannual variability ... the year. Results of surveys showed that the distribution and behaviour of E. carlsbergi are strongly ... of biomass of E. carlsbergi in the area indicated that its variability during the year is related ... resultats des campagnes ont montre que la distribution et le comportement dIE. carlsbergi sont etroitement ... myctophids which have high biomass and form regular concentrations. Over many years, the basic biological ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 337–367 : Author(s): Kozlov, A.N., K.V. Shust and A.V. Zemsky