Resultados de la búsqueda
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Homogeneity of Adélie penguins as krill samplers
penguins in the length of krill eaten, using data from Esperanza Bay. The variance component-0.26 was not ... ANOVA design was used to measure the variance component due to differences between individual Adélie ... significantly different from zero (F = 0.093; P = 0.54).This finding supports the argument for using individual ... penguins to estimate parameters of the prey population without discriminating by sex, weight or other ... , using data from Esperanza Bay. The variance component -0.26 was not significantly different from zero ... is the same for all nets of the same design and use. No significant sources of variation exist other ... SAMPLERS E. Marschoff1 and B. Gonzalez2 Abstract A nested ANOV A design was used to measure the ... variance component due to differences between individual Adelie penguins in the length of kriU eaten ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 253–257 : Autor(es): Marschoff, E. and B. Gonzalez
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A study of Patagonian toothfish (Dissostichus eleginoides) post-tagging survivorship in Subarea 48.3
in Subarea 48.3 Abstract / Description: During the 2005 fishing season, experiments on the ... , fish with a variety of injuries were selected to see if this affected recovery. In the final analysis ... initial condition had a higher survivorship than large animals and those in poor condition. The results ... confirmed the 95% rate. File: 12agnew-etal-fsa19.pdf ... . No limit was put on the number of fish to be subjected to this treatment, since the actual ... . on the Polarpesca I; good – fish very lively, with only minor abrasions and no major visual damage ... a good, average or poor state. On vessels where no assessment was made it was assumed that the ... analysis (seven, in total, froze within the 12-hour period on the Viking Bay and the Isla Santa Clara ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 279–289 : Autor(es): Agnew, D.J., J. Moir Clark, P.A. McCarthy, M. Unwin, M. Ward, L. Jones, G. Breedt, S. Du Plessis, J. Van Heerdon and G. Moreno
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Possible effects of different levels of krill fishing on predators – some initial modelling attempts
modelling attempts Abstract / Description: An initial attempt is made to develop the modelling framework ... suggested by the Joint Meeting of CCAMLR's Working Group on Krill (WG-Krill) and Working Group for the ... CCAMLR Ecosystem Monitoring Program (WG-CEMP) in 1992, in order to investigate the possible effects of ... krill fishing on krill predators. First, estimates are made of the parameters of predator survival rates ... model for deterministic krill dynamics (i.e., no noise about the krill stock-recruitment relationship ... a,K in this same proportion p of the years when there is no krill fishing. Similarly, the krill ... , this procedure leads to an immediate problem for the Addie penguin and the Antarctic fur seal: no sIM ... starting level, which corresponds to a y = 0 (no krill fishing) situation; this is taken to be K, for the ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 79–97 : Autor(es): Butterworth, D.S. and R.B. Thomson
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Survey design to estimate krill abundance during FIBEX
of the primary aims of FIBEX (First International BIOMASS Experiment), 1981 was to study the ... methodology for assessing the abundance of krill. The survey design used in the southwest Atlantic study area ... of the FIBEX is described in this paper. Sampling involved the use of echo sounders for estimating ... krill abundance as well as collection of data on the size, density and distribution of krill swarms. In ... survey in the Southern Ocean. Review and Outlook Memoirs of the National Institute of Polar Research No ... ABUNDANCE DURING FIBEX I. Everson, I. Hampton, G.M. Jolly Abstract One of the primary aims of FIBEX ... (First International BIOMASS Experiment), 1981 was to study the methodology for assessing the abundance ... of krill. The survey design used in the southwest Atlantic study area of the FIBEX is described in ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 253–263 : Autor(es): Everson, I., I. Hampton and G.M. Jolly
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Age and growth of spiny icefish (Chaenodraco wilsoni Regan, 1914) off Joinville–D’Urville Islands (Antarctic Peninsula)
selected for the study, consisting of 120 females and 98 males. The age of fish was estimated by counting ... in moulds. The precision of age estimates between readings was tested applying both the average ... percent error (APE) and the coefficient of variation (CV). Conversely, the accuracy of age estimates was ... not tested, so that present ageing data haveto be considered with caution. The estimated age range was ... 3. Applying the likelihood ratio test to the estimated VB growth parameters, no significant ... February–March 2006 and January 2007. A total of 218 specimens were selected for the study, consisting of ... 120 females and 98 males. The age of fish was estimated by counting annuli on transverse sections ... obtained by grinding and polishing whole otoliths embedded in epoxy resin in moulds. The precision of age ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 115–130 : Autor(es): La Mesa, M., A. De Felice, C.D. Jones, K.-H. Kock
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CCAMLR ecosystem monitoring and a feedback management procedure for krill
/ Description: The CCAMLR Ecosystem Monitoring Program has been developing a technique which might detect short ... attributable to loss of prey through fishing activities. The principal fishery in the CCAMLR Convention Area is ... the krill fishery and this paper examines ways in which the information being obtained from the ... (decline) in the predator parameters that is considered acceptable (i.e., for which no management action ... has been no systematic evaluation of the status of predators required to maintain ecological ... is the lack of knowledge on what may have happened to these predator populations had there been no ... no indication by the Commission of the required precision of such advice before it will be used to ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 345–350 : Autor(es): Constable, A.J.
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Assessment of krill flux factors in waters of South Orkney Islands during summer 1996
the Weddell Sea. The study area covered sites where high krill concentrations had often been observed ... 1996 Abstract / Description: This paper describes the results of an experiment conducted from 19 ... February to 7 March 1996 to assess krill flux factors in Subarea 48.2. The study area (80 x 240 n miles ... ) was located in the zone of interaction between waters of the Antarctic Circumpolar Current (ACC) and ... waters of the Antarctic Circumpolar Current (ACC) and the Weddell Sea. The s tudy area covered sites ... Frontal Zone. The study area covered sites where high krill concentrations had often been observed in ... ASSESSMENT OF KRZLL FLUX FACTORS IN WATERS OF THE SOUTH ORKNEY ISLANDS DURING SUMMER 1996 S.M. Kasatkina ... describes the results of an experiment conducted from 19 February to 7 March 1996 to assess krill flux ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 195–204 : Autor(es): Kasatkina, S.M., V.N. Shnar, M.I. Polischuk, A.M. Abramov and V.A. Sushin
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Fish stock assessment survey in Subarea 48.3
reduction. No commercial fishing on Champsocephalus gunnari has been reported from the area. It is suggested ... fish survey in the vicinity of South Georgia, CCAMLR Subarea 48.3, is described. Details are given of ... positions of hauls, catch rates and size composition of catches. The standing stock of one of the most ... important commercial species in the area, Champsocephalus gunnari, is shown to have undergone a major ... total of 66 sites was fished at South Georgia and 12 at Shag Rocks. The locations of the sites actually ... . There was therefore no need to apply a large haul adjustment (SC-CAMLR, 1990b) to the analyses ... during the course of the haul, no indications were seen that indicated the presence of large schools of ... fish. In addition, most trawling sites were examined prior to hauls being made either during the hours ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 25–67 : Autor(es): Everson, I., G. Parkes, K.-H. Kock, S. Campbell, Z. Cielniaszek and J. Szlakowski
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Directed research. Antarctic Marine Living Resources (AMLR). A program development plan
plan Abstract / Description: The US Antarctic Marine Living Resources (AMLR) Program is a national ... program providing information needed for US policy regarding the conservation and management of the marine ... living resources in the ocean areas surrounding Antarctica. The program is in support of US participation ... in the Commission and Scientific Committee of the Convention for the Conservation of Antarctic Marine ... , NOAA, U.S. Department of Commerce (U.S.A.) Abstract The U.S. Antarctic Marine Living Resources ... (AMLR) Program is a national program providing information needed for U.S. policy regarding the ... conservation and management of the marine living resources in the ocean areas surrounding Antarctica. The ... program is in support of U.S. participation in the Commission and Scientific Committee of the Convention ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 363-373 : Autor(es): Office of Science and Technology, NMFS, NOAA, US Department of Commerce (USA)
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Selectivity parameters for Notothenia gibberifrons Lönnberg, 1905 and Champsocephalus gunnari Lönnberg, 1905 obtained during “8611 ANTARCTICA [ANTARTIDA]” expedition
/ Description: Mesh selectivity experiments for several finfish species were conducted during the Spanish ... Antarctic cruise “ANTARTIDA 8611” using the covered codend technique. This paper presents the results ... species were conducted during the Spanish antarctic cruise "ANTARTIDA 8611" using the covered codend ... technique. This paper presents the results obtained for Notothenia gibberifrons and Champsocephalus gunnari ... HcnaHCKoro aHTapKTHlIecKoro pefica "ANTARDIDA 8611" 6bIJIH npOH3Be,l{eHbl 3KcnepHMeHTbl no CeJIeKTHBHOCTH ... en vigor en el ana 1987 y que no habfa sido aun refrendada cientfficamente (CCAMLR, 1986b). Las ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 87-105 : Autor(es): Balguerías, E.