Search results
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Otolith and body size relationships in the mackerel icefish (Champsocephalus gunnari)
, designated by the year in which the samples were obtained, for the research surveys were: 6 to 26 January ... data, and analyses of covariance were used to assess variability in model fits between years. Note ... to all years (1.79 to 3.75 mm) showed that the loglo-transformed data were best described by a linear ... regression model allowing for parallel lines for each year (F4.846 = 30.57, p < 0.001); including extra ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 117–123 : Author(s): Everson, I., B. Bendall and A. Murray
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Simulation of recovery rates of fish stocks in the South Georgia and Kerguelen Islands areas
that the stock could be expected to increase at an approximate rate of 30% per year with no fishing ... and catch over the next 20 years for the major species of concern at different fishing mortalities ... recruiting year classes. The time series for estimates is rather short, and the data upon which they were ... year classes is not known. - 232 - The simulations provide a measure against which the actual ... average, with the past observations. The simulations may prove useful in comparing observed performance of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 229-298 : Author(s): Hennemuth, R.C., K.D. Bisack and G. Duhamel
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Feeding patterns of nine species of Antarctic fish and assessment of their daily food consumption
hamatus and Cryodraco antarcticus were first-year matured C. wilsoni (SL=17-20 cm) (37% each ... for the waters of eastern Antarctica, which has a mean biomass density in the order of 4.6 to 5.1 thousand km2 ... Trematomus eulepidotus- planktivorous species with euphausiids, mainly Euphausia superba, being the staple ... forms of polychaetes, with Euphausia superba also comprising a considerable portion of its diet; (iii ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 321–333 : Author(s): Pakhomov, Y.A. and V.B. Tseitlin
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Optimization of survey sampling design in the detection of interannual variability and prey size selectivity in the diet of penguins
and Gonzalez (1989), comparison between years results naturally in a new level added at the top. Exact F tests ... are obtained dividing the mean square for "years" group by the mean square for "dates-within-years" group ... Model 11 ANOVA), the expected mean square for "years" group is: (1) 553 where aicp ... of penguins sampled each day, c?oCY is the variance component of "dates-in-years" group, nD is the number ... . Restrictions have been fixed in accordance with the recommendations of the fourth meeting of WG-CEMP: minimum ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 551–559 : Author(s): Marschoff, E. and B. Gonzalez
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Discrimination of Macrourus whitsoni and M. caml (Gadiformes, Macrouridae) using otolith morphometrics
Year Census of Antarctic Marine Life (IPY- CAML) voyage in 2008 led to the identification of a new ... ., 2004; Morley and Belchier, 2002; Megalofonou, 2006). Whole undamaged otoliths were viewed lateral ... year (Figure 5). While M. whitsoni approaches full size at about 17 years and can live to at least 27 ... years, M. caml takes more than 30 years Table 4: Discriminant analysis results using otolith ... , was recognised in 2010 with the identification of a new species, M. caml. Grenadier are the main by ...
Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 15–28 : Author(s): Pinkerton, M.H., C. Ó Maolagáin, J. Forman and P. Marriott
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Areas of seabed within the 500 m isobath around Elephant Island (Subarea 48.1)
in the early 1980s. Refinements to d e p t h r anges a r e crucial for t h e des ign a n d analysis ... bathymetric charts of the region have been prepared in some Member countries in the meantime. The Working ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 131–135 : Author(s): Kock, K.-H. and U. Harm
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Is the attempt to estimate the biomass of Antarctic fish from a multi-species survey appropriate for all targeted species? Notothenia rossii in the Atlantic Ocean sector – revisited
. Despite the closure of the fi shery almost 20 years ago, none of these multi-species surveys has ... years (1986–2003), as shown in the distribution of catches of N. rossii during the 2002 random survey ... in the same localities and were stable over a number of years. At South Georgia, one concentration ... of almost 25 years (1975–2000). Another location where aggregations of N. rossii appeared over a large ... survey combined with a number of identification hauls might be the most promising approach to estimating ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 141–153 : Author(s): Kock, K.-H., M. Belchier and C.D. Jones
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Alternative methods for determining subarea or local area catch limits for krill in Statistical Area 48
. This redistribution of catch could have adverse impacts on the fishery (e.g., shorter fishing seasons during years ... subarea in a single year. Then, for the following two years, that subarea would be closed to fishing ... . For example, if 242 1.5 million tonnes of krill were taken from Subarea 48.1 this year, it would ... be closed to fishing during the two following years while Subareas 48.2 and 48.3 were subsequently opened ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 237–249 : Author(s): Watters, G. and R.P. Hewitt
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Bias in the estimation of krill yield from using a deterministic formulation of the median unexploited spawning biomass
year - and three critical levels of depletion - 0.2, 0.4 and 0.6 of the median pre-exploitation ... spawning biomass. The projection period was 20 years. A subset of runs was undertaken to examine ... the effect of extending the projection period to 30 years on the probability of critical depletion to 0.2 ... for 20 years and 30 years were undertaken for all combinations of y and fishing season. The results ... . The krill yield model uses a biased estimate of the median pre-exploitation spawning biomass with a ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 1–8 : Author(s): Constable, A.J. and W.K. de la Mare
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Length-based assessment for mackerel icefish (Champsocephalus gunnari) at South Georgia
the given harvest control rule to set a two-year total allowable catch (TAC). One issue is the accurate ... to set a two-year total allowable catch (TAC). One issue is the accurate identification of age cohorts ... these numbers forward under the given harvest control rule to set a two-year total allowable catch (TAC). One ... to project the population forward for two years under a fixed harvest rate. The target harvest rate ... is that which ensures that the exploited biomass is equal to 75% of the unexploited biomass (after two years ... ). From this target harvest rate a two-year total allow- able catch (TAC) is obtained. Given ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 129–137 : Author(s): Hillary, R.M., C.T.T. Edwards, R.E. Mitchell and D.J. Agnew