Résultats de la recherche
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Revised research plan for the 2013/14 exploratory longline fishery of Dissostichus spp. in Division 58.4.3a
least 3 years with the same sample size as decided at the last CCAMLR meeting for the current research ... less than 3 n miles from each other but the rest of lines can be set freely between the separated lines ...
Meeting Document : WG-FSA-13/40 : Auteur(s): Delegation of Japan
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Joint research proposal for Dissostichus spp. in Subarea 88.3 by the Republic of Korea and New Zealand
(Parker et al. 2014). A 3-year research plan for this subarea was commenced by Korea in 2016 and new ... Abstract: Exploratory fishing for toothfish (Dissostichus spp.) in Subarea 88.3 began with a ... proposal is for an additional 3 years covering the period 2018, 2019 and 2020. It is designed to build on ...
Meeting Document : WG-FSA-17/40 : Auteur(s): Delegations of the Republic of Korea and New Zealand
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Review of CCAMLR activities on monitoring marine debris in the Convention Area
continue to form the major part of the debris associated with seabird colonies. The number of Antarctic fur ... seal entanglements at Bird Island reached a peak in 1993 and has showed a general decline since, with ... the 2006 season, five of which were by packaging bands. The number of seabirds contaminated with ... Database contains data from 12 sites, most within Area 48. There are 4 sites that have data for more than 3 ...
Meeting Document : SC-CAMLR-XXV/BG/09 : Auteur(s): Secretariat
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An index of per capita recruitment
)eM where R1 is the proportion of age-1 animals sampled in year y and M is the post-recruit mortality ... higher values such that the dynamic range of PCR is largest with high values of R1; increasing M tends to ... recruits. PCR is biased low with age-specific decline in mortality and reduction in the proportion of age-1 ... spawners. Introducing year to year random variability in both mortality and proportion of age age-1 ...
Meeting Document : WG-EMM-99/50 : Auteur(s): R. Hewitt (USA)
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Estimation of effective sample size for catch-at-age and catch-at-length data using simulated data from the Dirichlet-multinomial distribution
model in predicting class/bin by year frequencies is used to obtain a single, across-years, over ... year is important for such assessments, and this issue is studied using simulation. Between-haul ... heterogeneity within fishing year was simulated using samples from the Dirichlet-multinomial (D-M) distribution ... , with marginal class probabilities generated using a simple age-structured model incorporating fishing ... to 0.1544 by year 20 with a value of 0.13 at year 10.5 and recruitment was also varied lin- early ... , but in this case, declining from 196 939 for year 1 to 3 061 for year 20 with a value of 100 000 at ... within fishing year was simulated using samples from the Dirichlet-multinomial (D-M) distribution, with ... -length frequencies with kP′ replacing Pa. For simulation Model 2, to obtain the Pa for each year, the ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 115–138 : Auteur(s): Candy, S.G
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Evaluation of the effects of illegal, unregulated and unreported (IUU) fishing on the legal catch of fisheries for Dissostichus eleginoides
tonnes. The IUU catches are applied with the legal catch limit being adjusted each year after the IUU ... Abstract: CCAMLR currently establishes catch limits each year for Patagonian toothfish ... population at a productive level with only a small chance of become depleted. The increasing levels of ... year to compensate for the effects of historical levels of IUU catches. To date, the rate of reduction ...
Meeting Document : WG-FSA-02/69 : Auteur(s): A.J. Constable (Australia)
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Mackerel icefish size and age at South Georgia and Shag Rocks
between 1987 and 2002. Most surveys were between December and February (summer), with one in September ... (Spring). Mean total lengths (TL) of age-classes were determined for each year by examining length ... of age-classes were standardized to a common day of the year (16 January) based on the Bertalanffy ... 1987 and 1994, and this change was negatively correlated with summer sea surface temperatures during ...
Meeting Document : WG-EMM-03/7 : Auteur(s): A.W. North (United Kingdom)
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The spawning dynamics of Patagonian toothfish in the Australian EEZ at Heard Island and the McDonald Islands and their importance to spawning activity across the Kerguelen Plateau
estimating size at maturity, with stage 3 or above (according to the Kock and Kellerman (1991) scale) being ... development with histological analysis showed macroscopic characteristics often failed to distinguish spent or ... animals, and that even large mature fish may not spawn every year. As a result, the conventional method of ... ‘mature’, offset by two years to account for the duration of the maturation process, provided more ...
Meeting Document : WG-FSA-12/P08 : Auteur(s): D.C. Welsford, J. McIvor, S.G. Candy and G.B. Nowara
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Research plan for the exploratory longline fishery for Dissostichus spp. in 2016/17 in Division 58.4.3a by France and Japan
58.4.3a was estimated with Chapman method using “tagr” Package and single population approach at 603 ... tonnes. The developing CASAL model has to assess stock biomass with reliable estimates of IUU removals ... block by two vessels using longlines: Shinsei Maru No. 3 (Japan) and the Saint André (France). The catch ... the coming years in order to contribute to the tagging program and to achieve a robust stock ...
Meeting Document : WG-FSA-16/55 : Auteur(s): Delegation of France and Japan
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Estimating density and biomass of Antarctic krill (Euphausia superba) around South Shetland using the 2-dB difference method
estimated using an acoustics survey. Acoustic data were collected with 38 and 120 kHz from April 13 to 24 in ... collected by the commercial middle trawl fishing vessel. The data were processed and analyzed following ...
Meeting Document : SG-ASAM-18/08 : Auteur(s): S. Choi, K. Lee and D. An