Search results
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Natural mortality rate in the mackerel icefish (Champsocephalus gunnari) around South Georgia
South Georgia Abstract / Description: Information on natural mortality rates of the mackerel icefish ... careful consideration of the data and available methods, several errors are noted in earlier estimates ... . Unfortunately, because none of the datasets are sufficiently comprehensive, it is impossible to unequivocally ... order to try to provide a reasoned estimate of M. MATERIAL AND METHODS Data on numbers of fish at ... of fish in the sample, the first fully recruited age is coded zero, the numbers at each coded age ... (1975): M = 0.28 (assuming N,W, max at 7 years). DISCUSSION Robustness of Estimators Seber (1982 ... criterion has not been met (Table 1). Unfortunately, the pattern of size at age reported by Olsen (1955 ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 245–257 : Author(s): Everson, I
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Potential nursery areas for fish in the Prydz Bay region
for the shelf area of the Bay to be a nursery ground for nototheniid and channichthyid fish. Nearly ... break. The dominant size class was of 45 mm standard length, which corresponds to an age of 1 ... of the shelf. Although no specific nursery grounds were identified, the whole of the Prydz Bay shelf ... 7 to 8 m high, and nets were towed at fishing depth for a standard haul duration of 30 minutes at 3 ... at 30 mile intervals covering the entire shelf area of Prydz Bay, the banks to the west as far as ... not numerous, except in one station near the shelf edge at the eastern side of the bay (Figure 4). A ... in January/February 1991 indicated the potential for the shelf area of the Bay to be a nursery ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 369–380 : Author(s): Williams, R.
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Krill fishing in the Scotia Sea in relation to bathymetry, including the detailed distribution around South Georgia
distribution around South Georgia Abstract / Description: Analyses of the distribution of krill fishing based ... mainly in shelf and shelf-break areas on the northern side of the Scotia Arc. Regional analyses reveal ... that there are restricted parts of shelf and shelf-break areas where high catches have been obtained ... . Although these data give a general idea of where the fishery has operated, they do not reveal the localised ... distribution of krill (Euphausia stlperbn Dana) is being enhanced by research surveys aimed at understanding ... indication of the exact location of the fishery. Fine-scale data are more useful, but at a resolution of ... distribution of where the fishery has operated over the last decade at both the Scotia Sea and the regional ... ) and was at its lowest level during the winter of 1993 with slightly higher catches reported in 1994 ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 1–17 : Author(s): Murphy, E.J., P.N. Trathan, I. Everson, G. Parkes and F.H.J. Daunt
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Identifying taxonomic groups vulnerable to bottom longline fishing gear in the Ross Sea region
vulnerable marine ecosystems (VMEs) requires a specific list of the taxa that are considered vulnerable in ... the fishery being assessed. New Zealand identified an interim list of taxa to monitor in fishery by ... -catch in the Ross Sea as part of its benthic fisheries impact assessment. The rationale for including or ... at distinguishing non-VME taxa from VME taxa. The main point of confusion was in classifying pink ... of Marine Species (www.marinespecies. org). At these higher taxonomic levels (Phylum, Class, Order ... life-history characteristics of deep-sea invertebrates in the Ross Sea are rare, especially at the ... at risk because their recovery rates could be much less than a hypothesised rate of disturbance ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 105–127 : Author(s): Parker, S.J. and D.A. Bowden
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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 ... regulation of fisheries from an ecosystem perspective, under the Convention for the Conservation of Antarctic ... regulation which have a more rigorous scientific interpretation than the broad principles of conservation set ... framed in terms of quantities which can be robustly estimated, thus allowing the degree to which ... , even at a scientific level, considerations arise which would not arise in the pursuit of a purely ... of their food supply, top predators will have some population level at which their net annual ... conservation of dependent species in the interim. It may be fruitful at this stage to attempt to formulate ... Holt (1956) is to predict optimum levels of fishing mortality and age at first fishing from estimates ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 323-339 : Author(s): de la Mare, W.K.
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Otolith and body size relationships in the mackerel icefish (Champsocephalus gunnari)
) Abstract / Description: A large sample of otoliths from the mackerel icefish (Champsocephalus gunnari) was ... measured and weighed and their effectiveness as predictors of fish length and fish mass determined. The two ... measures, otolith length and otolith mass, provide good predictors of fish length, the latter being ... prediction limits of total lengths a little higher (a maximum of some the order,9.5 cm at 60 cm length. 3 ... simple linear regression models to Note that the prediction limits are of the order k11.5 cm at 60 cm ... Kingdom Abstract A large sample of otoliths from the mackerel icefish (Champsocephalus gunizari) was ... measured and weighed and their effectiveness as predictors of fish length and fish mass determined. The ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 117–123 : Author(s): Everson, I., B. Bendall and A. Murray
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International CCAMLR applied research and monitoring program, Prydz Bay priority area
area Abstract / Description: An outline is given of a proposed scientific research contribution by ... Australia towards the first five years of an International CCAMLR Applied Research and Monitoring Program in ... the Prydz Bay area. Emphasis is placed on the krill based part of the marine community in the Prydz ... Bay area. Some attention is also given to the fish and squid based part of the marine community on the ... APPLIED RESEARCH AND MONITORING PROGRAM, PRYDZ BAY PRIORITY AREA 1. INTRODUCTION At the meeting of ... confirmed by other member countries at the Fourth Meeting of the Scientific Committee of CCAMLR in ... at least the winter maximum extent of the sea-ice. We recognise, and give some attention to, the ... at this stage. 6 • TIME FRAME The initial three years of the Australian contribution will ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 283-295 : Author(s): Australia
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Data on krill (Euphausia superba Dana) consumption by coastal fishes in Division 58.4.2 (Kosmonavtov and Sodruzhestva Seas)
100 to 500 metres. Stock Size Seasonal Diet Percentage Krill Species (tonnes) (body mass) of ... Diet Percentage Krill Stock Seasonal Diet Percentage Krill (tonnes) (body mass) ofKrill Consumption ... (tonnes) (body mass) ofKrill Consumption in Food (tonnes) in Food (tonnes) 3.438* 81* 67236*. 89504 ... Stock 68° -78Of: and (x 1()6 tonnes) Production (x 103 tonnes) to the South of Consumed 65°30'S Min ... 58.4.2 (Kosmonavtov and Sodruzhestva Seas) Abstract / Description: Current estimates of the level of ... then been extrapolated over all of Antarctica. According to these calculations the entire amount of ... krill consumed is between 166 and 450 million tonnes; of this amount fish consume from 30 to 32 million ... tonnes (Lubimova, Shust, 1980 and Shust, 1987). However these extrapolated values of krill consumption by ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 305–319 : Author(s): Pakhomov, Y.A., V.A. Bibik and V.V. Gerasimchuk
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Trawl bag selectivity in the Champsocephalus gunnari fishery
, 5IBJI5IIO~HMHC5I lIaCTblO OCHOBHOti npOf'paMMbI 6HOJIOf'HlIeCKHx H OKeaHHlIeCKHX HCCJIe,l{OBaHHti, 6bIJIH ... BbInOJIHeHbI 3KcnepH- * AtIantNIRO, 5 Dimitry Donskoy Street, Kaliningrad 236000, USSR ** VNIRO, 17a ... : Experiments on trawl bag selectivity during fishing on pre-spawning concentrations of Champsocephalus gunnari ... were carried out in June 1990 in the South Georgia area concurrently with trawl surveys as part of the ... and the selectivity factor was 3.10 for a mesh size of 80 mm. Comparison of these results with results ... cm) as well as earlier sexual maturation of fish were noted. It was suggested that the use of Polish ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 295–312 : Author(s): Bidenko, V.G. and I.G. Istomin
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Factors to consider in developing management measures for krill
/ Description: A brief review of the objectives of the Convention for the Conservation of Antarctic Marine ... Living Resources is given along with an outline of steps for the evolution of management procedures for ... krill fisheries. Various possible elements of procedures such as reactive, predictive, and feedback ... management, modelling, indicator species, pulse fishing, and the use of open and closed areas and seasons are ... to at least a healthy proportion of their original abundance. The conservation of species which ... . Conservation also involves ensuring that species that are not exploited will be maintained at levels of ... becomes clear that it can fail to meet the objectives of the Convention. At this point, it has to be ... the 'signal' about recruitment from 'noisy' data. The first part of such a problem is to decide at ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 175–187 : Author(s): de la Mare, W.K.