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Estimates of circumpolar abundance of Antarctic krill based on recent acoustic density measurements
tonnes- at the low end of values that have been suggested in the past. The differences between our ... Paper Title: Estimates of circumpolar abundance of Antarctic krill based on recent acoustic ... density measurements Abstract / Description: The total circumpolar abundance of Antarctic krill ... (Euphausia superba) is estimated using recent measurements of krill density from acoustic surveys and ... range of krill. The biomass estimates fall between 60 and 155 million tonnes - at the low end of values ... scientific data was used to arrive at a total estimate of krill biomass of 272 million tonnes (Voronina ... and abundance of krill, mainly at a local scale (Azzali, 1992; Hewitt and Demer, 1994; Pauly and ... most commercial stocks of marine living resources are either overexploited or are at the limits of ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 87–99 : Autor(es): Nicol, S., A.J. Constable and T. Pauly
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Interactions of Patagonian toothfish fisheries with killer and sperm whales in the Crozet Islands Exclusive Economic Zone: an assessment of depredation levels and insights on possible mitigation strategies
depredation. When killer whales were absent at the beginning of the line hauling process, short lines (<5 ... Paper Title: Interactions of Patagonian toothfish fisheries with killer and sperm whales in the ... Crozet Islands Exclusive Economic Zone: an assessment of depredation levels and insights on possible ... Patagonian toothfish (Dissostichus eleginoides) longline fishery is exposed to high levels of depredation by ... depredation. When killer whales were absent at the beginning of the line hauling process, short lines (<5 000 ... , killer whales, sperm whales, CCAMLR 181 Impact of cetaceans on D. eleginoides fisheries at the ... 53.5 183 Impact of cetaceans on D. eleginoides fisheries at the Crozet Islands Interaction with ... and a brief description of their behav- iour. Lines that were hauled at night or in condi- tions of ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 179–195 : Autor(es): Tixier, P., N. Gasco, G. Duhamel, M. Viviant, M. Authier and C. Guinet
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A preliminary assessment of the stock of the ommastrephid squid Martialia hyadesi in the Scotia Sea based on data from predators
Paper Title: A preliminary assessment of the stock of the ommastrephid squid Martialia hyadesi in ... target species. It is likely, therefore, that exploitation of the sub-Antarctic ommastrephid species ... Martialia hyadesi; will be attempted in the future. This squid is an important component of the diet of ... several species of albatross and the southern elephant seal and is probably taken in significant ... , 94% of which is taken by southern elephant seals, and the other species may take at least a further ... SC-CAMLR-IX/BG/13 A PRELIMINARY ASSESSMENT OF THE STOCK ... OF THE OMMASTREPHID SQUID MARTIALIA BY ADESI IN THE SCOTIA SEA BASED ON DATA FROM PREDATORS· P.G ... exploitation of the sub-Antarctic ommastrephid species Martialia hyadesi will be attempted in the future. This ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 479–480 : Autor(es): Rodhouse, P.G.
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Krill distribution in the western Atlantic sector of the Southern Ocean during 1983/84, 1984/85 and 1987/88 based on the results of Soviet mesoscale surveys conducted using an Isaacs-Kidd midwater trawl
Paper Title: Krill distribution in the western Atlantic sector of the Southern Ocean during 1983 ... /84, 1984/85 and 1987/88 based on the results of Soviet mesoscale surveys conducted using an Isaacs ... -Kidd midwater trawl Abstract / Description: In this paper we consider the results of three mesoscale ... surveys covering a wide area of krill distribution between the Antarctic Peninsula and South Georgia ... was deployed at a depth of 100 m. This took about 8 minutes at vessel speed 3 knots. The trawl ... remained at a depth of 100 m for about 3 minutes, after which the trawl warp was slowly pulled up and the ... trawl towed for 5-minute periods at intermediate depths of 75, 50 and 25 m. In the absence of a heavy ... swell, the trawl was then towed at the surface for 2 to 3 minutes. The total period of trawling from ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 59–70 : Autor(es): Sushin, V.A. and K.E. Shulgovsky
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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
correspond to a certain extent to sets of specimens which hatched at the same time and developed under ... Paper Title: Problems of population age structure determination of Euphausia superba Dana using ... examines the size structure of populations of E. superba in relation to their habitat, on the basis of an ... analysis of data collected by the author during the 1981 season in the region of the Antarctic Peninsula ... to sets of specimens which hatched at the same time and developed under similar conditions ... - 227 - SC-CAMLR-V/BG/39 PROBLEMS OF POPULATION AGE ... STRUCTURE DETERMINATION OF EUPHAUSIA SUPERBA DANA USING AN EXAMPLE FROM THE ANTARCTIC PENINSULA AREA AND ... ADJACENT WATERS V.A.Spiridonov (U.S.S.R.) Abstract This paper examines the size structure of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 227-270 : Autor(es): Spiridonov, V.A.
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On assessment of Bertalanffy growth equation parameters and instantaneous natural mortality rate of South Georgia mackerel icefish
Bertalanffy growth equation. Mean value of natural mortality rate was estimated at 0.55. File: 03-Frolkina ... Paper Title: On assessment of Bertalanffy growth equation parameters and instantaneous natural ... mortality rate of South Georgia mackerel icefish Abstract / Description: An analysis and summary of ... extensive published and unpublished data on size-weight and size-age composition of South Georgia mackerel ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 29–36 : Autor(es): Frolkina, Zh.A. and R.S. Dorovskikh
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The role of fish as predators of krill (Euphausia superba) and other pelagic resources in the Southern Ocean (submitted to the 2008 Joint CCAMLR-IWC Workshop)
Paper Title: The role of fish as predators of krill (Euphausia superba) and other pelagic ... : Krill forms an important part of the diet of many Antarctic fish species. An understanding of the role ... of fish as krill predators in the Southern Ocean is critical to understanding how changes in fish ... paucity of biomass estimates and the mostly qualitative nature of food studies. Food consumption estimates ... resource for skates and slope and deep-sea fishes such as grenadiers at certain times of the year ... . Krill forms a substantial part of the diet of the skate Amblyraja georgiana at South Georgia ... (Matthews, 1978). As a by-product of whaling, fish served as local food at the whaling stations and were ... populations already being depleted at the time of the estimate) varied from 10 000 000 to 25 000 000 tonnes ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 115–169 : Autor(es): Kock, K.-H., E. Barrera-Oro, M. Belchier, M.A. Collins, G. Duhamel, S. Hanchet, L. Pshenichnov, D. Welsford and R. Williams
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Reproduction of the mackerel icefish (Champsocephalus gunnari) and its implications for fisheries management in the Atlantic sector of the Southern Ocean
been reviewed and discussed in the light of existing conservation measures. Length at first spawning is ... Paper Title: Reproduction of the mackerel icefish (Champsocephalus gunnari) and its implications ... for fisheries management in the Atlantic sector of the Southern Ocean Abstract / Description ... : Available information on key reproduction parameters of the mackerel icefish (Champsocephalus gunnari) has ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 51–68 : Autor(es): Kock, K.-H.
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The influence of bait quality on the sink rate of bait used in the Japanese longline tuna fishing industry: an experimental approach
Paper Title: The influence of bait quality on the sink rate of bait used in the Japanese longline ... determine the effects of bait size (large versus small) and bait condition (frozen versus thawed) on the ... sink rate of five species of bait used in the Japanese longline tuna fishery in Tasmanian waters. The ... effect of adding lead sinkers to baited hooks was also examined. While all factors (bait species, size ... of the swim bladders of fish, and was not known at the time of the experiments. To remove the ... hook is placed in a bait, the angle at which the shank of the hook protrudes from the fish, and the ... without standard deviation for the sake of simplicity. specimens of thawed aji-l (both sizes) sank at ... suppliers and may have been caught at different locations and/or at different times of the year. Some ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 123–129 : Autor(es): Brothers, N., A. Foster and G. Robertson
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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
Paper Title: Notes on the use of virtual population analysis for stock assessment of the mackerel ... Abstract / Description: Following on from the apparent failure of the CCAMLR Working Group on Fish Stock ... Assessment (WG-FSA) to satisfactorily assess in 1991 the status of the Champsocephalus gunnari population in ... -class (1 year olds in 1988), was quite robust, despite the use of various combinations of survey and ... to differences in the use of tuning data. Two VPA runs were made at WG-FSA-91, using the Laurec ... and performed at WG-FSA-91 provided a misleading representation of the current structure of the C ... of the VPA runs made at WG-FSA-91. Forwards projections to 1991/92 were made in an attempt to ... 'birthday' at the start of the split-year and the time of the survey used in Parkes (1991) (equation 1) was ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 49–79 : Autor(es): Parkes, G.