Résultats de la recherche
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Entanglement of Antarctic fur seals (Arctocephalus gazella) in man made debris at Bird Island, South Georgia, during the 2006 winter and 2006/07 breeding season
unknown. The increase in the number of winter entanglements (41) and animals with severe wounding (20) was ... the highest recorded in 14 years, whilst the recent escalation in summer entanglements since 2004/05 ... total of 41 winter entanglements were observed in the reporting period compared to 2 observed in the ... previous winter. This is the second highest winter total since records began in 1990 (the highest was in ...
Meeting Document : SC-CAMLR-XXVI/BG/17 : Auteur(s): Delegation of the United Kingdom
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Entanglement of Antarctic fur seals (Arctocephalus gazella) in man-made debris at Signy Island, South Orkney Islands, 2004/05
seals wearing neck collars of man-made debris, both were sub-adult males entangled with fishing net. In ... one case the entangling material had become attached to a rock and the animal was tethered to the ... : Entanglement of Antarctic fur seals (Arctocephalus gazella) in man-made debris at Signy Island, South Orkney ...
Meeting Document : SC-CAMLR-XXIV/BG/18 : Auteur(s): Delegation of the United Kingdom
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A descriptive analysis of the toothfish (Dissostichus spp.) tagging programme in the Ross Sea up to 2005/06
. Tagging rates by area over the past three years have been in the same proportion as the catch by area ... Abstract: A descriptive analysis of the toothfish tagging programme carried out in Subareas 88.1 ... . However, recapture rates have tended to be higher in the northern and eastern SSRUs 88.1C and 88.2E. About ... 20% of the recaptures could not be matched to a release observation, mainly because of missing ...
Meeting Document : WG-FSA-SAM-06/09 : Auteur(s): A. Dunn and S.M. Hanchet (New Zealand)
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Fishery Report: Exploratory fishery for Dissostichus spp. in Division 58.4.3a
the Year-of-the-Skate, and the protocol in CCAMLR-XXVII, paragraph 4.55, was implemented. 20. In ... exploratory in 2000. That year, the Commission agreed on four exploratory fisheries for Dissostichus spp. in ... 2009, the Commission agreed that the Year-of-the-Skate should be extended to 2009/10 in order to allow ... been a success overall and had met its objectives to enhance data collection and improve tagging in ...
Document : Site Section: Publications
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Acoustic estimates of krill biomass in the Elephant Island area: 1981–1993
Paper Title: Acoustic estimates of krill biomass in the Elephant Island area: 1981–1993 Abstract ... / Description: Acoustic estimates of krill biomass in the vicinity of Elephant Island are presented for the ... density over the 13-year period were 1 703 x 103 tonnes and 53.2 g/ 2. File: 01hewitt-demer.pdf ... years 1981 to 1993 (with the exception of 1982 and 1986). Estimates for 1981 to 1991 are based on ... the effects of variations in year class strength. In six out of seven cases the change in density ... BIOMASS IN THE ELEPHANT ISLAND AREA: 1981 - 1993 R.P. Hewitt Southwest Fisheries Science Center La ... 92093, USA (Supported by the Hertz Foundation) Abstract Acoustic estimates of krill biomass in the ... /m2. Average biomass and average density over the 13-year period were 1 703 X 103 tonnes and 53.2 g ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 1–5 : Auteur(s): Hewitt, R.P. and D.A. Demer
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Diel vertical distribution of Antarctic krill around the South Shetland Islands in February 2019 and its potential effect on biomass estimation
vertical distribution of krill swarms around the South Shetland Islands in Subarea 48.1 were analyzed based ... on data collected by the Chinese fishing vessel participating in the international 2019 Area 48 ... survey. Results show that more krill swarms were found in shallower depth at night than during daytime ... likely underestimate the krill density due to the shallow distribution pattern of the animal, which may ...
Meeting Document : SG-ASAM-2019/05 : Auteur(s): X. Wang, X. Yu, J. Zhang and X. Zhao
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Glider-based estimates of Antarctic krill in Bransfield Strait, and the West shelf off Livingston Island, Antarctica
biomass assessments of Antarctic krill (Euphausia superba) in the Bransfield Strait and the west shelf of ... -December 2018 and mid-March 2019. We compare mean biomass density (g m-2) estimates derived from gliders to ... replace vessel-based biomass surveys. In the Bransfield Strait, glider-based biomass density estimated ... . Cutter, J. Walsh and G. Watters Title: Glider-based estimates of Antarctic krill in Bransfield Strait ...
Meeting Document : WG-EMM-2019/13 : Auteur(s): C. Reiss, A. Cossio, G. Cutter, J. Walsh and G. Watters
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Some components of uncertainty in the CCAMLR 2000 acoustical survey of krill
Abstract: Quickly studied and quantified were sources of uncertainty in the CCAMLR 2000 ... acoustical estimate of krill abundance in FAO statistical area 48. The variance in system calibration was ... evaluated in relation to the effects of variant water temperature and salinity on sound speed, sound ... absorption, and beam characteristics. Uncertainty in krill target strength (TS) was estimated using a ...
Meeting Document : WG-EMM-00/49 : Auteur(s): D.A. Demer (USA)
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Competition-induced starvation drives large-scale population cycles in Antarctic krill
—exhibits a five to six year population cycle, with oscillations in biomass exceeding one order of magnitude ... Abstract: Antarctic krill (Euphausia superba)—one of the most abundant animal species on Earth ... cycles in Antarctic krill Approval: Approved Secretariat Workflow Status: Content Approved Delegation ...
Meeting Document : WG-EMM-18/P05 : Auteur(s): A.B. Ryabov, A.M. de Roos, B. Meyer, S. Kawaguchi and B. Blasius
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A simulation study of the method of deriving natural mortality rate using data for Champsocephalus gunnari in Subarea 48.3
Champsocephalus gunnari in Subarea 48.3 Abstract / Description: A method of determining the rate of natural ... been correctly chosen. Data for Champsocephalus gunnari in Subarea 48.3 are used to show that the ... described method is sound. When a mistake is made in the choice of natural mortality coefficient, the ... estimate of the intercept of the regression is other than zero. A bias in the intercept will be positive if ... group in the first fishing year is estimated from equation (8); (ii) the abundance values Na,l, a ... fishing year, and fish mean weight are given in Tables 1 and 2. The catch by weight of C. gunnari in ... the value of 0.35 used by the Working Group on Fish Stock Assessment (WG-FSA) in previous years. In ... DERIVING NATURAL MORTALITY RATE USING DATA FOR CHAMPSOCEPHALUS GUNNARI IN SUB AREA 48.3 P.S. Gasyukov ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 69–83 : Auteur(s): Gasyukov, P.S. and R.S. Dorovskikh