Resultados de la búsqueda
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Information on the status of fjord Notothenia rossii, Gobionotothen gibberifrons and Notothenia coriiceps in the lower South Shetland Islands, derived from the 2000–2006 monitoring program at Potter Cove
sampling period of 24 years which began in 1983, and at Harmony Cove in the summers of 2001to 2003. The ... Notothenia coriiceps in the lower South Shetland Islands, derived from the 2000–2006 monitoring program at ... decline in trammel net catches of fjord Notothenia rossii and Gobionotothen gibberifrons in relation to ... increasing trend of N. rossii catches from 1991 to 2006, the actual levels are half of those found in the ... of 24 years which began in 1983, and at Harmony Cove in the summers of 2001 to 2003. The decline in ... continuous sampling period of 24 years which began in 1983, and from 2001 to 2003 at Harmony Cove (HC). By ... declined from values of over 20% in 1985 to values of less than 5% in 1988. Since then, G. gibberifrons ... abundance of N. rossii in the split-years 1995/96, Table 1: Results of the ANOVAs performed on total and ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 83–87 : Autor(es): Barrera-Oro, E.R. and E.R. Marschoff
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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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Annual variation in breeding biology of gentoo penguins, (Pygoscelis papua) at Bird Island, South Georgia
breeding population at Bird Island decreased by 20% and increased by 84% in successive years during the ... breeding are discussed. Within years egg-laying was highly synchronous: 95% of clutches were initiated in ... -3.4 days. Chicks creched when 25-30 days old. and this varied between years. possibly related to food ... varied annually, and with age of the breeding bird, nest location and, in one year, with laying date ...
Meeting Document : WG-CEMP-90/38 : Autor(es): T.D. Williams (United Kingdom)
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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