Resultados de la búsqueda
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Biomass, abundance and distribution of fish in the Kerguelen Islands EEZ (CCAMLR Statistical Division 58.5.1)
Division 58.5.1). The swept-area method was used in the depth range from 100 to 1 000 m with 207 random ... distribution of species, commercial or not, that are important in the ecosystem and are of major interest for ... explanations can be put forward: a deeper range of these adults or an effect of fishing reduc- ing that part ... . antipodianus) seem not to be selected by that fishing method. The mean values of yields (catch-per-unit ... as a top predator with C. gunnari in its diet (Guinet et al., 2001) mostly when its main prey ... same evolution in biomass to that of C. rhinoceratus should be expected. The POKER 2006 survey masks ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 1–32 : Autor(es): Duhamel, G. and M. Hautecoeur
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Sources of variance in studies of krill population genetics
their ecological and economic importance. The possibility that there are distinct genetic stocks of ... development of genetic technologies that are more sensitive to subtle population structure than older methods ... . superba and the boreal species Meganyctiphanes norvegica that used allozymes found no evidence of genetic ... , the underlying assumption of these studies that differentiation between samples is caused primarily by ... sites may be incorrect. Our recent study of E. crystallorophias mtDNA variation has indicated that ... scale of connectedness of these local populations with those in other areas remains to be explored. В ... (Ayala and Valentine, 1979). It should be emphasised that studies that have been unable to demonstrate ... e si ze s fo r al lo zy m e st ud ie s re pr es en t th e m ax im um n um be r ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 107–116 : Autor(es): Jarman, S.N. and S. Nicol
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Potential impacts of bottom trawling on benthic communities in Prydz Bay, Antarctica
demonstrate that the biomass of benthos that could be disturbed by commercial bottom trawling could be high in ... in areas in which commercial bottom trawling may occur so that measures can be taken to ensure the ... Prydz Bay. Also, the results indicate that there is a need to examine the nature of benthic communities ... benthos that could be disturbed by commercial bottom trawling could be high in Prydz Bay. Also, the ... commercial bottom trawling may occur so that measures can be taken to ensure the integrity of these ... and the other bottom gear but not caught in the net could not be detected with this method. Thus, the ... biomass of benthos that could be disturbed by commercial bottom trawling could be high in Prydz Bay. Also ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 403–410 : Autor(es): Constable, A.J.
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Myctophids in the diet of Antarctic predators
, the total number of species may be underestimated because identification of myctophids in predator ... Ocean sector) may be the second most important predator of myctophids. The occurrence of myctophids in ... the diet of predatory species appears to be highly variable though there are insufficient data to ... evaluate this. It is obvious that myctophids are widespread in diets of many Antarctic predators. More ... Antarctic food web is not adequately understood. It was suggested that myctophids might be a part of a ... ), Metelectrona (one species) and Gymnoscopelus (four species). However, the total number of species may be ... , Gynmodraco acuticeps, from the Kosmonavtov Sea (Indian Ocean sector) may be the second most important ... predator of myctophids. The occurrence of myctophids in the diet of predatory species appears to be ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 335–368 : Autor(es): Sabourenkov, E.
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Cephalopod research in the Antarctic
major component of the Antarctic marine food web and it seems inevitable that they will be the subject ... policy for management of Antarctic cephalopods. In view of the rapidity that cephalopod fisheries can ... cephalopods should be fully monitored, research should be concentrated on population biology and trophic ... relations of cephalopods and a central reference collection of Antarctic cephalopods should be established ... Antarctic marine food web and it seems inevitable that they will be the subject of future commercial ... •. Considerable progress could be made by further sampling for cephalopods with large mid-water and bottom trawls ... ). Information from this research will be essential if cephalopod stocks are to be managed with due ... which should be addressed. Total allowable catch will have to be set in any future fishery so that the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 323-334 : Autor(es): Rodhouse, P.G.
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Notes on the use of virtual population analysis for stock assessment of the mackerel icefish, Champsocephalus gunnari (Lönnberg, 1906) in Subarea 48.3 for the 1990/91 and 1991/92 seasons
absence of this year class, the TAC would be extracted from the younger, less abundant year classes, with ... +) with that observed during this survey. The samples taken during the survey were dominated by 2 and 3 ... reconcile the estimated population structure with that observed during the UK stock assessment surveys of ... the survey t (July = month 1, August = month 2 etc.), and known catches C in month i, the number of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 49–79 : Autor(es): Parkes, G.
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Some principles for fisheries regulation from an ecosystem perspective
/ Description: The paper discusses some principles to be considered in the formulation of a framework for the ... out in the Convention. An important property required for subsidiary objectives is that they are ... framed in terms of quantities which can be robustly estimated, thus allowing the degree to which ... objectives are being met to be assessed. The advantages of using a feedback method of regulation are ... of this property is that it allows adjustments to be made to the level of fishing with the least ... Convention applies shall be conducted in accordance with the provisions of this Convention and with the ... be allowed to fall below a level close to that which ensures the greatest net annual increment ... and related species', that is; the a~imals with which man enters into competition for their food ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 323-339 : Autor(es): de la Mare, W.K.
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Soviet proposals for a program of ecosystem monitoring in the Commonwealth Sea and Prydz Bay
phytoplankton. It is recommended that all surveys and sampling techniques should be standardized and that all ... research activities be co-ordinated by participating CCAMLR Members. The overall program should be co ... sampling techniques should be standardized and that all research activities be co-ordinated by ... three major research directions, the findings of which might then be seen in inter-relation with the ... .11), are envisaged to be regularly conducted with data on physical and chemical parameters of the ... Sea ecosystem. It should, however, be borne in mind, that P. antarcticum is not only a prey ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 355-362 : Autor(es): USSR
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A rationale for conservation areas within Antarctic waters
; only that exchanges between them by migration be low in relation to productivity (growth and survival ... densities to be compared with earlier surveys in location F. The observed density of crabeater seals in ... Antarctic seabird was known, together with the foraging range of that species during the breeding season ... , some inferences might be drawn concerning the distribution of food species at that time. While the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 513-535 : Autor(es): Chittleborough, R.G.
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Choosing distance between acoustic survey tacks
mathematical model was used to show that the distance between acoustic survey tacks can reasonably be selected ... that the suggested criterion be applied in real hydroacoustic surveys. File: 08-Kalikhman-et-al.pdf ... mathematical model was used to show that the distance between acoustic survey tacks can reasonably be selected ... recommended that the suggested criterion be applied in real hyroacoustic surveys. CHOISIR LA DISTANCE ... . Mathematically, it can be strictly proved that the typical size is determined by the relationship 1 (3) In ... paCCT05fHHe MeJKgy rancaMH rrpH aKycTHqeCKOH CoeMKe ~enecoo6pa3Ho BhI6Hpa T h, OCHOBhIBa~c h Ha THrrHqHOM ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 153-164 : Autor(es): Kalikhman, I.L., Z.I. Kizner, B.R. Zaripov and W.D. Tesler