Résultats de la recherche
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Is current management of the Antarctic krill fishery in the Atlantic sector of the Southern Ocean precautionary?
format to explain the management of the Antarctic krill (Euphausia superba) fishery in the subareas 48.1 ... to 48.4, and current knowledge about the state of the regional krill stock. The revisions provide a ... evidence for a decline in the abundance of krill in the 1980s, but no evidence of further decline over more ... % level considered precautionary for Antarctic krill. However, the permitted exploitation rate in each ...
Meeting Document : WG-EMM-16/21 : Auteur(s): S. Hill, A. Atkinson, C. Darby, S. Fielding, B. Krafft, O.R. Godø, G. Skaret, P. Trathan and J. Watkins
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Concordance of inter-annual fluctuations in densities of krill around South Georgia and Elephant Islands: biological evidence of same-year teleconnections across the Scotia Sea
Abstract: Acoustic estimates of the densities of Antarctic krill, Euphausia superba, in areas ... and 1997. Estimated densities of krill at El were most often higher than at SG, although this may ... mirrored by those at the other location; for example, 1991 and 1994 were years of very low krill density at ... similarities suggests that densities of krill at both locations are directly linked, and may be impacted by the ...
Meeting Document : WS-AREA 48-98/11 : Auteur(s): A.S. Brierley (UK), D.A. Demer, R.P. Hewitt (USA) and J.L. Watkins (UK)
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ANALYSIS OF KRILL OBSERVER COVERAGE IN SUBAREA 48.3
fishing for krill in Subarea 48.3 were analysed using Variance Components Analysis. Krill mean and median ... rate of sampling equivalent to 18% of total hauls taken in a season being sampled for krill and 11% for ... larval fish. For both krill and larval fish between vessel variance was slightly lower than between haul ... total season hauls sampled for krill and an equivalent or higher sampling proportion for larval fish ...
Meeting Document : WG-EMM-09/25 : Auteur(s): D.J. Agnew, P. Grove, T. Peatman, R. Burns and C. Edwards (United Kingdom)
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An acoustic survey of Antarctic krill on the South Georgia shelf, CCAMLR Subarea 48.3, in January 1992
Abstract: Acoustic surveys designed to assess krill abundance are costly in time and money, so ... the opportunity was taken in 1992 to produce a krill biomass estimate as a by-product of a fish stock ... Georgia. The appearances of echoes on echo charts were used to decide which echoes to include in krill ... backscattering strength at the two frequencies into a) echoes from krill-sized scatterers and smaller and b ...
Meeting Document : WG-EMM-96/42 : Auteur(s): Everson, I., Goss, C.
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Distribution and abundance of Antarctic krill in the vicinity of Elephant Island during the 1994 austral summer
Abstract: The distribution and abundance of Antarctic krill (Euphausia superba) were estimated ... n.mile2 immediately north of Elephant Island. During the first survey, the highest densities of krill were ... be 401 X 106 t. Five weeks later highest densities of krill were mapped north of Elephant Island and ... high densities of krill were mapped in the shoal waters to the north of Elephant Island; biomasses were ...
Meeting Document : WG-Joint-94/09 : Auteur(s): R.P. Hewitt and D.A. Demer (USA)
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Variability of krill fishery operations in Subarea 48.2 in relation to fishing methods: spatial–temporal distribution of CPUE and of fishing efforts
Abstract: The author continue to analyze krill fishery data for understanding fishery operations ... analysis of spatial- temporal variability of krill fishery based on CPUE trends, trawling duration, catch ... performance requires knowledge of krill distribution in the fishing grounds with special attention to krill ... onboard krill fishing vessels should be the sources of this information. Author(s): S. Kasatkina ...
Meeting Document : WG-EMM-14/22 : Auteur(s): S. Kasatkina (Russia)
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Southern right whale (Eubalaena australis) reproductive success is influenced by krill (Euphausia superba) density and climate
change in the abundance of the species main prey, krill (Euphausia superba), on the feeding grounds ... analysis we examined the response of the species to climate anomalies and krill densities. Significant ... correlations were found with krill densities (r = 0.69, p = 0.002, lag 0 years), Oceanic Niño Index (r = −0.65 ... influence southern right whale breeding success in southern Brazil by determining variation in food (krill ...
Meeting Document : WG-EMM-16/P06 : Auteur(s): E. Seyboth, K.R. Groch, L. Dalla Rosa, K. Reid, P.A.C. Flores and E.R. Secchi
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Krill (Euphausia superba) distribution contracts southward during rapid regional warming
Euphausia superba (hereafter, ‘krill’) has contracted southward over the past 90 years. Near their northern ... juvenile krill. We found evidence for environmental controls on recruitment, including a reduced density of ... larval krill. However, the total post-larval density has declined less steeply than the density of ... recruits, suggesting that survival rates of older krill have increased. The changing distribution is ...
Meeting Document : WG-EMM-2019/P02 : Auteur(s): A. Atkinson, S.L. Hill, E.A. Pakhomov, V. Siegel, C.S. Reiss, V.J. Loeb, D.K. Steinberg, K. Schmidt, G.A. Tarling, L. Gerrish and S.F. Sailley
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Evaluation of the krill stock in Subarea 48.3, June–August 1995
till 15 August 1995 peculiarities of krill distribution, their characteristics including time stability ... (tolerance), are examined, calculations of biomass and krill commercial concentrations values are given ... . Interannual changes in some indices of krill fishing Resources in this subarea from 1985 till 1995 undergo ... analysis. Author(s): Bibik, V.A. Title: Evaluation of the krill stock in Subarea 48.3, June–August 1995 ...
Meeting Document : WG-EMM-96/70 : Auteur(s): Bibik, V.A.
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THE ASAM 2010 ASSESSMENT OF KRILL BIOMASS FOR AREA 48 FROM THE SCOTIA SEA CCAMLR 2000 SYNOPTIC SURVEY
the CCAMLR 2000 synoptic survey data to generate a quality checked krill biomass for area 48 following ... the acoustic protocol identified in ASAM 2009. The total biomass of krill in the Scotia Sea was ... estimated from acoustic and net data collected during the international multi-ship krill biomass in the ... during the assessment and include additional information of krill density by strata and transect ...
Meeting Document : WG-EMM-11/20 : Auteur(s): S. Fielding and J. Watkins (UK) and ASAM participants: A. Cossio, C. Reiss and G. Watters (USA), L. Calise and G. Skaret (Norway), Y. Takao (Japan), X. Zhao (People’s Republic of China), D. Agnew (UK) and D. Ramm and K. Reid (CCAMLR Secretariat)