Search results
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An index of per capita recruitment
the frequency distribution of R1 and the assumed value of M. Three distributions, each with a mean of 0.5 ... for several levels of M. When R1 followed a normal distribution with a mean of 0.5 and a standard deviation ... the level of mortality increased, the mean and mode of the distributions of PCR decreased, although ... constant with changes in the level of mortality. When R1 followed a lognormal distribution with a mean ... recruitment (PCR) is proposed such that where R 1 is the proportion of age-l animals sampled in year y and M ... distributions of R I, and three levels of M were assumed in order to investigate the resulting distributions of ... years, and when all age-l animals spawn. These conclusions are insensitive to changes in the shape of ... in mortality and reduction in the proportion of age-l spawners. Introducing year-to-year random ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 179–196 : Author(s): Hewitt, R
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REVISED RESEARCH PLAN FOR TOOTHFISH IN DIVISION 58.4.4A and B BY SHINSEI MARU NO. 3 IN 2009/10
that includes 4 SSRUs, taking into account the conservative exploitation rate (less than 3.8 % of the total ... 4 SSRUs, taking into account the conservative exploitation rate (less than 3.8 % of the total estimated ...
Meeting Document : WG-FSA-09/12 : Author(s): Delegation of Japan
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Revised research plan for toothfish in Division 58.4.4 a and b by Shinsei Maru No. 3 in 2011/12
structure, size, movement and growth of Dissostichus spp. in the centred area of Division 58.4.4 a & b ... . An approximate stock biomass level of Dissostichus spp. in the survey area (SSRUs B and C in Division ... nearly same survey design as in the 2010/11. A total of 71 research hauls will be allocated in the same ... in the northeast of SSRU B instead of an unconducted haul in the 2010/11. To apply mark-and recapture ...
Meeting Document : WG-FSA-11/15 Rev. 1 : Author(s): K. Taki, T. Iwami and M. Kiyota (Japan)
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e-sc-v-a4.pdf
... in stock size (Doc. 2). 12. Polish survey data during the 1985/86 season indicated some increase in mean ... been some decrease in the mean length of fish from 34.8 cm in 1979/80 to 32.0 cm in 1985/86 ... ; and this is now less than the mean length at first maturity. Age composition data also suggest an increase ... effort in weight, by the mean weight of individuals in the cohort. Season Catch Effort Length ... in mean length of the samples, and a decrease in the proportion of fish less than 45 cm. There was ... . 54. There has been some decrease in the mean length of fish from 34.8 cm in 1979/80 to 32.0 cm in ... catch per unit effort) by dividing the total catch per unit effort in weight, by the mean weight of ... was in the chair. A list of those attending is given in Appendix I. Dr J.A. Gulland was appointed
application/pdf attached to:WG-FSA-86
Meeting Report : WG-FSA-86
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An introduction to the Southern Ocean Observing System (Paper XP18 to CEP–SC-CAMLR Workshop 2016)
Antarctic Peninsula and one for the Indian Sector. A Ross Sea Working Group is in the process of being ... of monitoring programs in different regions of the CCAMLR and Antarctic Treaty areas, there are 5 ... trends in ecosystem properties, attribution of trends to causes, and predicting future trajectories; the ... relevant to the Southern Ocean, and better advance knowledge of field activities in order to facilitate ...
Meeting Document : WG-EMM-16/70 : Author(s): A.J. Constable, L. Newmman, O. Schofield, A. Wahlin and S. Swart
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Korean research plan for Dissostichus spp. in Subarea 48.5 in 2015/16
could be because of the lack of information on this region. The research surveys were conducted in this ... area for two years. The Republic of Korea noted that the research activities in this region had ... relatively high catch rates in the Convention area. In the light of fishing experiences from the fisheries of ... ): Delegation of the Republic of Korea Title: Korean research plan for Dissostichus spp. in Subarea 48.5 in ...
Meeting Document : WG-SAM-15/08 : Author(s): Delegation of the Republic of Korea
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ON THE STRATOSPHERE OZONE DISTRIBUTION ASYMMETRY POSSIBLE IMPACT ON KRILL BASED ECOSYSTEM
stratosphere is observed last decades. As was shown by authors earlier in the latitudinal interval of 55-75°S ... in Antarctic spring months (Sep-Nov) the minimum of quasi-stationary wave (QSW) in total ozone ... surface in comparison to opposite area, where the lack of UVR should exist in spring month. These factors ... add the uncertainties to the information gaps in the status of Antarctic krill resources existed due ...
Meeting Document : WG-EMM-09/36 : Author(s): G. Milinevsky (Ukraine)
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Evaluation of de la Mare’s composite standardised index for generating a simple time-series summary of many long-term datasets on Antarctic predators: consequences of missing values and criteria for inclusion of predator parameters
datasets on Antarctic predators. The value of the index in a given year is dependent on the specific ... parameters present in that year. In this respect, the robustness of the index is dependent on that subset of ... specify general criteria for the inclusion of predator parameters in the index with regard to the ... indicate that a time series of 3 years for the full matrix of 8 parameters used in this study is sufficient ...
Meeting Document : WG-EMM-98/45 : Author(s): A. Constable (Australia)
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Are penguins and seals in competition for Antarctic krill at South Georgia?
, respectively, the main mammal and bird consumers of Antarctic krill (Euphausia superba). In recent years the ... population at South Georgia may have resulted in greater competition for the prey of macaroni penguins ... 1989 and 2000. Foraging ranges of the two species showed considerable overlap in both years but the ... species was very similar, but over the last 12 years the prevalence of krill in their diets has diverged ...
Meeting Document : WG-EMM-02/22 : Author(s): K.E. Barlow, I.L. Boyd, J.P. Croxall, K. Reid, U.J. Staniland and A.S. Brierley (United Kingdom)
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RESEARCH PLAN FOR TOOTHFISH IN DIVISION 58.4.4a & b BY SHINSEI MARU NO. 3 IN 2009/10
employed for 93 research hauls (three quarters of the total) in order to make an evaluation of the stock ... utilities of the data and reducing uncertainties. In 31 hauls (a quarter of total sets), the experimental ... one fishing line, will be used in order to standardize the CPUE of Trot line more accurately in this ... Abstract: In order to clarify stock status and biological characteristics of Dissostichus spp. in ...
Meeting Document : WG-SAM-09/11 : Author(s): Delegation of Japan