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Growth and natural mortality of Patagonian rockcod (Patagonotothen guntheri shagensis) from Shag Rocks shelf
were found to be 2.5 years and 12.6 cm. File: 09-Shilbanov.pdf ... in calculations and the optimal age and length for harvesting Patagonian rockcod were found to be 2.5 years ... are most abundant. Sexual maturity is attained by fish at 11 to 13 cm length, 20 to 30 g weight and age ... to obtain the sum of years T, (Le. the number of years lived together by all specimens caught ... ). In N 7 6' 5 • 4 :5 2 3 Age, % 60 -40 20 n=1470 2. 3 Lt 5 6 Age, years Figure 2: Age composition of P.g ... and the optimal age and length for harvesting Patagonian rockcod were found to be 2.5 years and 12.6 cm. Resume ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 111–121 : Author(s): Shlibanov, V.I.
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Mesopelagic fish of the Southern Ocean - summary results of recent Soviet studies
an adequate supply of food both for young and adult fish throughout the year, together with specific features ... during the first two years of life were found to be 30 to 36 mm per year (Zaselskiy et al.,1985). Growth ... that fish from the Scotia Sea and the Antarctic Convergence areas (between 20° and 30°W) had statistically ... = 20.35 [i -eo.zs (t+O.t4>]. Mean natural mortality of 1.14 was calculated from one year's data ... these species are summarized in tables with details on area, season and source of data. Some data, e.g ... . length composition of samples, are also illustrated in figures. The importance of studies on the role of ... myctophids in the Antarctic ecosystem is highlighted. File: 26-Sabourenkov.pdf ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 433–457 : Author(s): Sabourenkov, E.N.
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A proposed management procedure for the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity
) and (A1.30)) for longliners, ',y C is the catch-at-length for longliners in year ... a 20-year period, and in particular the following four statistics which were intended to capture key ... the reference set OMs. The probability of Bsp falling below 20% of Ksp within the 20-year projec- tion period ... sp spB K< for that scenario. The prob- ability of the median of Bsp over the 20-year pro- jection ... ) resource in the Prince Edward Islands vicinity Abstract / Description: The status of the toothfish ... resource in the Prince Edward Islands region is unclear because CPUE data suggest considerable depletion ... future TACs in the face of this appreciable uncertainty. Four Operating Models (OMs) reflecting ... resource. The MP uses two data sources: the recent trend in longline CPUE and the mean length of the ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 33–69 : Author(s): Brandão, A. and D.S. Butterworth
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Status of the Polish FIBEX acoustic data from the West Atlantic
-CAMLR, 1991a). Cette analyse met en evidence le fait que la densiti. acoustique est faible ... ~1, paragraph 3.78). This re-analysis was carried out by Trathan et al. (1992) who calculated estimates ... to the formula given in BIOMASS (1986): M V B S = ~ O ~ O ~ L - ~ O ~ O ~ A R - S L - V R + 20 log R. + 2aRo ... k r i l l o f d i f f e r e n t s i z e s f o u n d d u r i n g F I B E X is the equivalent beam pattern (-26 dB), and C is (BTOMASS, 1991). an equipment constant (20 dB). MVBS values ... / Description: Acoustic data from the Polish FIBEX survey in the West Atlantic were analysed using recent ... densities of krill in the oceanic parts of the Drake Passage were low (3 g m-2); however, the results also ... in the Bransfield Strait. These results are discussed in the context of spatial and seasonal ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 125–132 : Author(s): Trathan, P.N., J. Kalinowski and I. Everson
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Exploratory fishing for Dissostichus spp. in the Antarctic region (Subareas 48.1, 48.2 and 88.3)
2 30 20 10 0 0 1 2 3 4 Repletion index Figure 6: Stomach repletion in Dissosticlzus rnawsoni ... BHAOB Dissostichus B nonpailoaax 48.1,48.2 H 88.3. B xone pa6oT acnonb30san~cb npoMbrmneHHbre npycbr ... mCnonb30~anmCb CapAHHbI (Sardi~zops S U ~ U X ) M KanbMapbI (Illex argelztinus ... ~ / K P I O Y O K ( n o ~ p a f i 0 ~ 88.3), 19,l ~/KPH)YOK (nOflpa30~ 48.1) H 3,O T/KPH)~OK (nOflpa30~ 48.2), CO CpeAHHM 3HaYeHIleM IIo ... Paper Title: Exploratory fishing for Dissostichus spp. in the Antarctic region (Subareas 48.1 ... establish the presence of Dissostichus spp. in Subareas 48.1, 48.2 and 88.3. Industrial longlines (Spanish ... °14'S), while Patagonian toothfish (Dissostichus eleginoides) were caught in waters from King ... George Island in the South Pacific Ocean (61°24'S) to the Scotia Sea in the South Atlantic (58°03 ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 1–17 : Author(s): Arana, P.M. and R. Vega
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Temporal variability and the interrelationships between CEMP parameters collected on Adélie penguins at Béchervaise Island
examined for Adélie penguins over a period of 12 years. Data were collected from 1990/91 to 2001/02 ... while other parameters, such as arrival counts and incubating nest counts, are more stable between years ... and the interrelationships between these parameters were examined for Adélie penguins over a period of 12 years. Data ... , such as arrival counts and incubating nest counts, are more stable between years. The low degree of correlation ... was exam- ined in the correlation matrix analyses. This meant that some years were excluded from ... / 19 90 14 / 11 / 19 90 17 / 11 / 19 90 30 / 11 / 19 90 05 / 12 / 19 90 20 ... / 19 92 20 / 11 / 19 92 04 / 12 / 19 92 07 / 12 / 19 92 30 / 12 / 19 92 26 ... / 19 97 14 / 11 / 19 97 16 / 11 / 19 97 30 / 11 / 19 97 03 / 12 / 19 97 20 ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 75–90 : Author(s): Emmerson, L.M., J. Clarke, K.R. Kerry and C. Southwell
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The use of predator-derived krill length-frequency distributions to calculate krill target strength
, there is a 20-year time series of data on the repro- ductive performance of krill-dependent predators ... des filets n'affichent qu'une difference de l%, ce qui met en Pvidence la n6cessitP d'obtenir des ... XMWHHKOB AJIX OQeHKM YaCTOTHOrO PaCnpeAeJIeHMR AJIUH TOrAa, KOrAa Ha CyAHe MOrYT UCIIOJIb30 ... seals are present at South Georgia throughout the year, and samples of krill collected from ... calculated from acoustic data. Changes in the lengthfrequency distribution of krill over a period of a few ... weeks produced a 10% difference in TS, whereas simultaneous samples from predators and nets produced ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 155–163 : Author(s): Reid, K. and A.S. Brierley
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Age, growth and mortality of Patagonian toothfish (Dissostichus eleginoides) caught off Kerguelen
was estimated to be –0.6 years and residual variance 2.9. Age distributions of toothfish caught by two vessels ... by trawlers and longliners at Kerguelen, and longevity was estimated to be 36 years. Total instantaneous ... to measure precision; relative bias for the age data was estimated to be –0.6 years and residual ... at Kerguelen, and longevity was estimated to be 36 years. Total instantaneous mortality Z was estimated ... a ge ( ye ar s) 0 10 20 30 40 50 Reference age (years) 0 10 20 30 40 50 E st im at ed ... Estimated age (years) 0 10 20 30 40 50 T ot al le ng th ( cm ) 0 20 40 60 80 100 120 140 ... 1 1 1 1 130 1 Total 1 10 20 39 39 21 30 27 23 19 23 14 22 21 21 20 6 16 Prop. 0.00 ... a South Georgia reference collection, compared to reference ages. 0 10 20 30 40 50 E st im at ed ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 29–41 : Author(s): Ashford, J., G. Duhamel, C. Jones and S. Bobko
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Seabird interactions with trawl and longline fisheries for Dissostichus eleginoides and Champsocephalus gunnari
both within a n d outside the CCAMLR area, and in recent years the D. eleginoides fishery ... . A few birds (usually less than 20 black-browed albatrosses and giant petrels) would sit near the chute ... ) will be proportionately greater. The global decline of the black-browed albatross population observed during the last 20 ... years (Woehler, in press) underlines the importance of quantifying the mortality due to fishing ... (Dissostichus eleginoides) in the 1994/95 season near Macquarie Island and Kerguelen Island. Longlining for D ... associated with longlining in the Kerguelen region were lower than those reported for the South Georgia area ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 93–99 : Author(s): Williams, R. and D. Capdeville
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Measurements of differences in the target strength of Antarctic krill (Euphausia superba) swarms at 38 kHz and 120 kHz
of encaged animals which varied in mean length from 30 to 39 mm. Calculated target strengths at 120 kHz were ... the two integration systems. Figure 4: Figure 5: 84 50 40 ~ Z 30 « o "" ~ ~ 20 Z 10 ... . Pe310Me Pa3JUflUf5.1 B CHJIe aKycTHlIecKot't: QeJIH B3pOCJIOro (30-60 MM) aHTapKTHlIeCKoro KPHJI5 ... nepeClIeTa CHJlbl aKYCTHlIecKoti L\eJlH 120-50 KrL\, HCnOJlb30BaHHOMY Ha Pa601leM ceMHHape no aKYCTHKe ... Paper Title: Measurements of differences in the target strength of Antarctic krill (Euphausia ... superba) swarms at 38 kHz and 120 kHz Abstract / Description: Differences in the target strength of adult ... differences in the mean back-scattering strength of swarms simultaneously insonified at these two frequencies ... in studies off the South Orkneys and Elephant Island in March 1990. Back-scattering strengths at 120 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 75–86 : Author(s): Hampton, I.