Search results
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A simulation study of krill fishing by an individual Japanese trawler
Paper Title: A simulation study of krill fishing by an individual Japanese trawler Abstract ... krill trawler over a half-month period. It is based on an underlying krill distribution model whose ... model modifications are introduced to eliminate this inconsistency: artificially elongating krill swarms ... of a CPUE form) for krill biomass in the 600 n mile square oceanic sector modelled are considered ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 1–108 : Author(s): Butterworth, D.S.
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Distribution, biomass and characteristics of the Euphausia superba fishery around South Georgia (Subarea 48.3)
South Georgia (Subarea 48.3) Abstract / Description: Krill distribution in the South Georgia area ... of recent findings is discussed in this paper. There has been less focus on data concerning krill biomass ... assessments. The existing uncertainty in krill biomass assessment can be largely attributed to high ... krill biomass for the area. It was therefore only possible to begin to explain the reasons ... WG-KRILL-90/19 DISTRIBUTION, BIOMASS ... . Makarov**, L.G. Maklygin** Abstract * Krill distribution in the South Georgia area and many aspects ... . The existing uncertainty in krill biomass assessment can be largely attributed to high variability ... of krill swarms and to attempt to determine more reliable values of its biomass after a number of census ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 123–147 : Author(s): Latogursky, V.I., R.R. Makarov and L.G. Maklygin
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A compilation of parameters for ecosystem dynamics models of the Scotia Sea – Antarctic Peninsula region
– Antarctic Peninsula region Abstract / Description: Expansion of the krill fishery in the Scotia Sea ... . These parameters include life history and krill consumption parameters for the fish, whale, penguin and seal ... species that feed on krill in this region. Maximum krill transport rates are also derived from the OCCAM ... are provided where possible. The results suggest that fish are the major krill consumers in all SSMUs ... of the krill fi shery in the Scotia Sea–Antarctic Peninsula region beyond the current operational catch limit ... that are needed to assess these methods. These parameters include life history and krill consumption parameters ... for the fi sh, whale, penguin and seal species that feed on krill in this region. Maximum krill transport ... are the major krill consumers in all SSMUs, with perciform fi sh taking as much krill as whales, penguins ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 1–25 : Author(s): Hill, S.L., K. Reid, S.E. Thorpe, J. Hinke and G.M. Watters
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Fitting Euphausia superba into Southern Ocean food-web models: a review of data sources and their limitations
to include krill in food-web models and to guide modellers to key sources of data. It describes the strengths ... of each method of sampling krill, i.e. with nets (for historical time series, demographic information ... and live krill), acoustics (distribution, time series, biomass and swarm-scale information), the fishery ... . Observations that krill occupy the underice layer, the 0–10 m layer, the deeper water column and the benthos ... animals have received as much research attention as Antarctic krill (Euphausia superba ... ., 2012). Antarctic krill (hereafter simply referred to as krill) are micronekton (up to 65 mm in length ... . Difficulties in sampling krill across their full habitat and in experimentation mean that sig- nificant ... modellers represent post-larval krill in their models. Many aspects of krill biology have been reviewed ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 219–245 : Author(s): A. Atkinson, S. Nicol, S. Kawaguchi, E. Pakhomov, L. Quetin, R. Ross, S. Hill, C. Reiss, V. Siegel, G. Tarling (submitted to the 2008 Joint CCAMLR-IWC Workshop)
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Variations in condition indices of mackerel icefish at South Georgia from 1972 to 1997
predominantly on krill. An index of condition which uses the ratio of the measured total mass to the estimated ... mass is shown to provide a good indicator of local krill density. The index is likely to be little ... affected by the reproductive cycle unless there is high krill availability during the months around ... responds rapidly to changes in krill density and therefore can provide indications of short-term variations ... the early 1970s. They are known to feed predominantly on krill. An index of condition which uses the ratio ... of the measured total mass to the estimated mass is shown to provide a good indicator of local krill density ... . The index is likely to be little affected by the reproductive cycle unless there is high krill availability ... observed values. The condition index responds rapidly to changes in krill density and therefore can ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 119–132 : Author(s): Everson, I. and K.-H. Kock
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Analysis of the diet of Champsocephalus gunnari at South Georgia in late summer from 1994 to 1997, Dr Eduardo L. Holmberg surveys
was analysed using frequency of occurrence (F%) and dietary coefficient (Q%) methods. Krill (Euphausia superba ... and Thysanoessa sp., which are known to be important alternative food in years of krill scarcity, as well as fish ... of C. gunnari did not reveal any selectivity pattern for any of the prey items. The availability of krill ... in Subarea 48.3 during the period investigated can be defined as low in 1994 (equivalent to years of krill ... of occurrence (F%) and dietary coefficient (Q%) methods. Krill (Euphausia superba), followed by the amphipod ... to be important alternative food in years of krill scarcity, as well as fish, was only occasional or negligible ... pattern for any of the prey items. The availability of krill in Subarea 48.3 during the period ... investigated can be defined as low in 1994 (equivalent to years of krill scarcity), intermediate in 1995 ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 103–123 : Author(s): Barrera-Oro, E., R. Casaux and E. Marschoff
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Editorial
indicators from populations that may be depleted. The suite of papers on krill cover the spectrum of analysis ... of data gathered on fishing vessels to using trends in patents to predict the future for krill fishing ... ; as well as a description of the analysis of acoustic data to determine krill biomass. During 2010 ... as well as the potential spatial overlap with vulnerable benthic habitats. In the case of Antarctic krill ... from populations that may be depleted. The suite of papers on krill cover the spectrum of analysis ... of data gathered on fishing vessels to using trends in patents to predict the future for krill fishing ... ; as well as a description of the analysis of acoustic data to determine krill biomass. During 2010 ... of Antarctic krill, there are papers that describe how abundance estimates are derived from acoustic data ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 167 : Author(s): Editors
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The use of analysis of penguin stomach contents in simultaneous study of prey and predator parameters
and predator parameters Abstract / Description: Size selectivity of krill by penguins is shown to be highly ... is proposed as being the correct approach for analysis because lack of independence between krill specimens ... found in the stomach of a given penguin prevents the pooling of krill lengths from different samples ... . A highly significant linear regression between krill size and time of sampling was found. Full use ... Size selectivity of krill by penguins is shown to be highly sensitive to the statistical assumptions ... for analysis because lack of independence between krill specimens found in the stomach of a given penguin ... prevents the pooling of krill lengths from different samples. Samples taken in Bahfa Esperanza were used ... to illustrate the different approaches to this analysis. A highly significant linear regression between krill ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 367–375 : Author(s): Marschoff, E. and B. González
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Problems of population age structure determination of Euphausia superba Dana using an example from the Antarctic Peninsula area and adjacent waters
to age groups. It is shown that the size groups of krill are not a seasonal phenomenon, but correspond ... on the growth rates of krill in relation to feeding conditions, temperature factors and other biotic and abiotic ... of E. superba through the study of genetic, morphological and physiological uniformity of krill both within ... composition of krill, modelling of growth under various conditions and physiological and chemical research ... that the size groups of krill are not a seasonal phenomenon, but correspond to a certain extent to sets ... regarding the age and growth of E. superba; in addition, data are cited on the growth rates of krill ... of genetic, morphological and physiological uniformity of krill both wthin and between size groups ... the comparison of results of studies of spatial and temporal variability in the size composition of krill ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 227-270 : Author(s): Spiridonov, V.A.
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Size compositions of males and females in the course of the life cycle of Euphausia superba
different years. The observed variations were related to stages of krill maturity during the reproductive ... cycle. Information on size composition by sex is considered to be vital for an understanding of krill ... include not only measurement but also sex determination of adult krill. File: 01-Makarov.pdf ... years. The observed variations were related to stages of krill maturity during the reproductive cycle ... WG-KRILL-90/5 SIZE COMPOSITIONS OF MALES AND FEMALES ... is considered to be vital for an understanding of krill population structure. It is suggested that duties ... provenant d'annees differentes. Les variations observees portaient sur les stades de maturite du krill ... essentielles a la comprehension de la structure demographique du krill. I1 est suggere que les biologistes ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 3–16 : Author(s): Makarov, R.R.