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Standardization of fishing effort for Champsocephalus gunnari in the South Georgia area (Subarea 48.3)
Paper Title: Standardization of fishing effort for Champsocephalus gunnari in the South Georgia ... inflexible in its use of data types and has no estimate of accuracy. A standardized CPUE index for ... Champsocephalus gunnari fishing in Subarea 48.3 is derived using a multiplicative model and data from many ... different classes (countries, types of vessel, fishing gear, months and years). Multiple regression is used ... fishing was at first carried out by means of bottom trawls, in recent years midwater trawls have been ... CHAMPSOCEPHALUS GUNNARI IN THE SOUTH GEORGIA AREA (SUB AREA 48.3) P.S. Gasiukov* Abstract Traditional ... calculation of catch-per-unit-effort series is inflexible in its use of data types and has no estimate of ... accuracy. A standardized CPUE index for Champsocephalus gunnari fishing in Subarea 48.3 is derived using ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 327–336 : Autor(es): Gasiukov, P.S.
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An assessment of toothfish in Subarea 48.3 using CASAL
Paper Title: An assessment of toothfish in Subarea 48.3 using CASAL Abstract / Description: This ... various tuning datasets. Bayesian methods are used in the estimation procedure, and uncertainty in the ... years refer to the fishing season that started in December prior to the year quoted. For example, year ... measurements of the catch weighted by catch size. In the early years (1985–1995) only fleet-based ... fishing in different years with different selec- tivities. However, for each fleet, the selectivities- at ... different fleets in the two sets of years (Table 3). The specifics of the CASAL estimation routines are ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 65–95 : Autor(es): Hillary, R.M., G.P. Kirkwood and D.J. Agnew
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Champsocephalus gunnari stock status in the South Georgia area
intensity was F 0.1. In the first two cases TAC=25-30 thousand tonnes and stock size does not change. For ... Paper Title: Champsocephalus gunnari stock status in the South Georgia area Abstract ... recruitment was taken at the lowest possible level for all these years (400 million specimens). Catch-per-unit ... intensity (F) in a predicted period was equal to the average value of fishing mortality: (b) For the ... was FO.1• In the first two cases TAC=2S-30 thousand tonnes and stock size does not change. For the ... WG-FSA-88/32 CHAMPSOCEPHALUS GUNNARI STOCK STATUS IN ... possible level for all these years (400 million specimens). Catch-per-unit-effort was also taken at the ... lowest level. T AC was calculated for three possible situations: ( a) Fishing intensity (F) in a ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 1-18 : Autor(es): Borodin, R. and P. Kochkin
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Length- and age-at-spawning of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea
Paper Title: Length- and age-at-spawning of Antarctic toothfish (Dissostichus mawsoni) in the ... -at-spawning for female and male Antarctic toothfish (Dissostichus mawsoni) from fish sampled in the ... least a 6–12 month period, resulting in a developed group of oocytes accumulating at the final ... region is 16.6 years (95% CI 16.0–17.3) or 133.2 cm (95% CI 130.9–135.7) by length. On average, males ... Age (years) 0 10 20 30 ... f fi sh Age (years) 5 10 15 20 25 30 ... not be abundant in a recently spawned ovary. These cells range in size from 20–150 μm. Later in the ... ). Of the EVG-stage fish that did not spawn in the previous season, 70% were between 13 and 18 years ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 53–73 : Autor(es): Parker, S.J. and P.J. Grimes
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Scientific observations in CCAMLR fisheries – past, present and future
Paper Title: Scientific observations in CCAMLR fisheries – past, present and future Abstract ... -independent studies are difficult and expensive to conduct. In addition, the size of the Convention Area, its ... remoteness and prevailing inclement weather further complicate matters. Therefore, in addition to the ... observers on board fishing vessels has assumed prominence in the collection of essential data for fisheries ... principles outlined in Article II of the CAMLR Convention (CCAMLR, 2004a, Part 1) embody an ‘ecosystem’ and ... Measure 41-01 (2004), paragraph 7) (see CCAMLR, 2004b). 0 10 20 30 40 50 60 1996 1997 1998 1999 ... ve years. For four successive years since 2000, levels of incidental seabird mortality in regulated ... observation on krill fi shing vessels has increased in the past three years. The observers collect data in ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 81–98 : Autor(es): Sabourenkov, E.N. and E. Appleyard
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Distribution of the Soviet krill fishing fleet in the South Orkneys area (Subarea 48.2) during 1989/90
Paper Title: Distribution of the Soviet krill fishing fleet in the South Orkneys area (Subarea ... fishing ground off the northwestern tip of Coronation Island. CPUE showed variability with a minimum in ... November (3.2 tonnes/hour) and maximums in February and March (9.6 tonnes/hour and 11.0 tonnes/hour ... hydrodynamic characteristics of the area, for example a complex current around the islands together with ... islands together with topographically-induced effects. Except in November 1989, temporally and spatially ... Soviet commercial fleet in Subarea 48.2 during the 1989/90 season, together with information on CPUE ... 11-15 November 16-20 November 21-25 November 26-30 November Number of Vessels 2 2 2 ... THE SOVIET KRILL FISHING FLEET IN THE SOUTH ORKNEYS AREA (SUBAREA 48.2) DURING 198911990 V.A ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 51–62 : Autor(es): Sushin, V.A
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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 ... sink rate of five species of bait used in the Japanese longline tuna fishery in Tasmanian waters. The ... . The addition of a 20 g lead sinker to a conventional 20 g tuna hook reduced the sink time of bait ... the effect of added weight (sinkers) on the sink rates of bait. Lead sinkers weighing 10 g, 20 g, 30 ... a 20 g hook, as used by the Japanese to catch tuna, was measured. Since the position in which a ... I small Fish size category Sink Rates of Bait Used in Japanese Longline Tuna Fishery 20 I I ... sinker to a conventional 20 g tuna hook). ACKNOWLEDGEMENTS The baits used in this experiment were ...
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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Quantifying movement behaviour of vessels in the Antarctic krill fishery
analyses demonstrate the need for high-quality year-round data on all vessels participating in the krill ... Paper Title: Quantifying movement behaviour of vessels in the Antarctic krill fishery Abstract ... / Description: Ten years of recent fine-scale haul-by-haul krill data were used to characterise the behaviour ... of the krill fishery. Analysis of distance between hauls in relation to their catch level revealed a ... markedly over the last 20 years (Kawaguchi and Nicol, 2007). Models of the interactions between the ... . The range of area considered in this paper was between 50°S–70°S and 70°W–30°W. Catch rates (Cn/tn ... probabilities of operating within the same local fishing grounds (in this case within 30 n miles radius ... effort. For example, in the CCAMLR season 1999/2000, the probability of fishing within the same 30 n ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 131–148 : Autor(es): Kawaguchi, S. and S.G. Candy
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Foraging behaviour and reproductive success in chinstrap penguins: the effects of transmitter attachment
, South Shetland Islands. In total, one member of each pair at 20 nests and both members of each pair at ... Paper Title: Foraging behaviour and reproductive success in chinstrap penguins: the effects of ... method with which to monitor foraging trip duration in penguins by the CCAMLR (Commission for the ... failure, and reproductive success in chinstrap penguins; (ii) differences in these parameters when ... 666 nests on Seal Island, South Shetland Islands. In total, one member of each pair at 20 nests and ... in behaviour of the study animal through the effects of increased drag (Wilson et al., 1986) or the ... control group was followed from 29 December 1990 until 30 January 1991 (12 nest-check dates) and in the ... 20 mm diameter by 55 mm length, 25 g, respectively). It is possible that the increase in foraging ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 291–303 : Autor(es): Croll, D.A., J.L. Bengtson, P.L. Boveng, M.E. Goebel and J.K. Jansen
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Trawl bag selectivity in the Champsocephalus gunnari fishery
from previous years demonstrates close similarity. A significant increase in modal length (up to 34-35 ... Paper Title: Trawl bag selectivity in the Champsocephalus gunnari fishery Abstract / Description ... were carried out in June 1990 in the South Georgia area concurrently with trawl surveys as part of the ... recommended in order to fully understand the mechanism involved. File: 18-Bidenko-and-Istomin.pdf ... AND AREA Selectivity hauls were made from 17 to 20 June 1990 in an area having the mean coordinates ... - 7 19 - 16 20 30 38 21 - 20 22 - 20 23 - 24 24 38 64 25 534 373 26 1436 866 27 2984 1430 28 ... WG-FSA-90/32 TRAWL BAG SELECTIVITY IN THE ... selectivity during fishing on pre-spawning concentrations of ChampsocephaZus gunnari were carried out in June ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 295–312 : Autor(es): Bidenko, V.G. and I.G. Istomin