Résultats de la recherche
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An integrated stock assessment for the Heard Island and the McDonald Islands Patagonian toothfish (Dissostichus eleginoides) fishery in Division 58.5.2
, longline and trap sub-fisheries. Compared to the 2014 assessment that was accepted by WG-FSA-14 to be used ... into two periods. All model runs were conducted with the CASAL version 2.30-2012-03-21 that was agreed ... stock biomass B 0 than that obtained in 2014, with an MCMC estimate of 87 077 tonnes (95% CI: 78 500-97 ... eleginoides) fishery at the Heard Island and the McDonald Islands in CCAMLR Division 58.5.2 with data until ...
Meeting Document : WG-FSA-15/52 : Auteur(s): P. Ziegler and D. Welsford (Australia)
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Descriptive analysis of the toothfish (Dissostichus spp.) tagging programme in Subareas 88.1 & 88.2 for the years 2000–01 to 2012–13
released and 95 recaptured since 2001. In recent years, most vessels have achieved or exceeded the required ... tagging rate of one toothfish per tonne of catch in the Ross Sea region. Tag recapture data showed that ... and north regions have been observed. Of those that have changed areas (i.e. between Shelf, Slope ... that in 2009. The reason for the low number of recaptures in 2009 and 2012 is likely a consequence of ...
Meeting Document : WG-FSA-13/49 : Auteur(s): S. Parker, A. Dunn, S. Mormede and S. Hanchet (New Zealand)
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Identification of Amblyraja species in the longline fishery in Subarea 48.3 – CCAMLR
, with females attaining total lengths up 122.5 cm and males 117.5cm, compared with 96 and 101 for ... 50% maturity for A.georgiana. Comparisons of colour and patternation were found to be consistent ... between 300-500m. We conclude that A.sp.anon probably a separate species from A.georgiana. For the ... purposes of CCAMLR assessments and monitoring it should be treated as a s eparate species from A.georgiana ...
Meeting Document : WG-FSA-02/54 : Auteur(s): M. Endicott (United Kingdom), L.J.V. Compagno (South Africa) and D.J. Agnew (United Kingdom)
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Ukrainian complex marine expeditions in the Southern Ocean
expeditions last conducted in 2001 were resumed aboard Ukrainian fishing vessel More Sodruzhestva which ... carries out regular fishing activities in the CAMLR Convention Area. The vessel equipped with modern ...
Meeting Document : WG-EMM-2019/62 : Auteur(s): E. Dykyi, V. Komorin and A. Fedchuk
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Intra-annual variability in the abundance of Antarctic krill (Euphausia superba) at South Georgia, 2002–2005: within-year variation provides a new framework for interpreting previous ‘annual’ krill density estimates
survey estimates with the observed pattern of within-year variability showed that some of the alleged ... pattern in krill abundance was detected that recurred consistently over all 3 years. Krill densities in ... (mean = 89.5 g m-2 SD 64.2). A simple polynomial regression model with time as the independent variable ... periods suggesting that the mooring point estimates had relevance in a wider spatial context (ship surveys ...
Meeting Document : WG-EMM-06/25 : Auteur(s): R.A. Saunders, J.L. Watkins, K. Reid, E.J. Murphy, P. Enderlein, D.G. Bone and A.S. Brierley (United Kingdom)
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Feasibility of lead-radium dating the otoliths of blackfin icefish (Chaenocephalus aceratus) and ocellated icefish (Chionodraco rastrospinosus)
that the collection of otoliths from these species be given a priority whenever possible to facilitate ... determining the parameters of future applications that would lead to a validation of age. In the current study ... , sample mass for the pooled otolith samples was low (~0.4 g). This finding, coupled with low radium-226 ... levels, led to age determinations that had a high margin of uncertainty; however, the findings led to an ...
Meeting Document : WG-FSA-10/17 : Auteur(s): A.H. Andrews, M. La Mesa and J. Ashford (USA)
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Analysis of krill fishery operations in Subarea 48.1: spatial-time distribution of CPUE and fishing efforts
method. We obtained the additional evidence that ‘high CPUE’ regime’ in 2006-2011 is not associated with ... Abstract: In previous years we revealed that period 2006-2011 is characterized by the highest ... methods. Our investigation shows how fishery operated by years and month in each SSMUs with special ... fishing methods on fleet locations was not revealed also. Our opinion is that climate changes can ...
Meeting Document : WG-EMM-14/21 : Auteur(s): S. Kasatkina and P. Gasyukov (Russia)
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WG-FSA-13
CCAMLR Scheme of International Scientific Observation (26 to 30 August 2013, CCAMLR Headquarters, Hobart ... relative by-catches of taxa associated with vulnerable marine ecosystems by autolines and Spanish longlines ... , and 48.6 from vessels with anomalous CPUE A. Dunn, B.R. Sharp (New Zealand), C. Darby (United Kingdom ... mackerel icefish, Champsocephalus gunnari, based on the January 2013 survey C. Darby and T. Earl (United ...
Meeting
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Sensitivities in the assessment of the Patagonian toothfish (D. eleginoides) in Subareas 48.3 and 48.4 to truncation of tagging data
double-tagged recaptures suggests that including recaptures from fish at liberty for long periods will ... introduce bias into the assessment. Sensitivity tests on both stocks show that this bias occurs in practice ... . Sensitivity tests on the 48.3 assessment show that this bias is not entirely explained by the effect of double ... tagging. Author(s): T. Earl Title: Sensitivities in the assessment of the Patagonian toothfish (D ...
Meeting Document : WG-SAM-17/35 : Auteur(s): T. Earl
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Whale depredation – Data collection guidelines
Description / Abstract: Marine mammal interactions with fisheries are a growing major world-wide ... issue with both substantial ecological and economic consequences. Most longline fisheries operating ... assessment if depredated fish are disregarded when defining quotas. Stocks that have also been under pressure ... depredation activity in the Southern Ocean is due to interactions with odontocetes (toothed whales ... whale groups/individuals that are most likely to interact with sperm whales can be identified. 1.9.2 ... performed) with one picture per individual of this group. Powerpoint is a simple application that can be ... meters with sufficient light) and observation by the observer (observer can be alerted by the crew when ... depredation that can be included into stock assessments. 1.3.2. Description Variable type ...
Document : Site Section: Science