Resultados de la búsqueda
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Variation or reproductive performance of seabirds and seals at South Georgia, 1976–1986 and its implication for Southern Ocean monitoring studies
success, foraging trip duration and offspring growth rate. 1977-78 and 1983-84 were summers of ... Abstract: Aspects of the reproductive performance of Black-browed, Grey-headed and Wandering ... Orkney Islands) are summarised and reviewed. Breeding success of the Wandering Albatross, which breeds in ... proportion of their diet, have shown major fluctuations in some or all of: breeding population size, breeding ...
Meeting Document : WG-CEMP-87/13 : Autor(es): J.P. Croxall, T.S. McCann, P.A. Prince and P. Rothery (United Kingdom)
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Review of activities in monitoring marine debris in the CAMLR Convention Area
-fishing items such as packaging and wood remain the most common type of debris items found in beach ... Conservation Measure 26-01 requiring packaging bands to be cut up into 30 cm pieces. The amount of debris in ... colonies of grey-headed albatrosses and black-browed albatrosses at Bird Island has increased recently, and ... the major category of items found was plastics. The amount of fishing related items (fishing lines ...
Meeting Document : WG-IMAF-11/04 Rev. 1 : Autor(es): Secretariat
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Performance and geometry of the FP-120 trawl used during UK fish stock assessment surveys around South Georgia, Subarea 48.3
Paper Title: Performance and geometry of the FP-120 trawl used during UK fish stock assessment ... opening (and, thus, swept area) of a bottom trawl are discussed. In situ measurements of the FP-120 trawl ... presented. Regression equations for the estimation of horizontal opening from other, more easily measured ... around South Georgia are estimated using a new regression equation. The results of this calculation are ... increases the chances of damage to or loss of bottom trawl gear. For example, during the survey undertaken ... using a single transducer mounted in the middle of the headline during the tow. This measurement can ... AND GEOMETRY OF THE FP-120 TRAWL USED DURING UK FISH STOCK ASSESSMENT SURVEYS AROUND SOUTH GEORGIA ... , swept area) of a bottom trawl are discussed. In situ measurements of the FP-120 trawl used during the ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 51–69 : Autor(es): Pilling, G. and G. Parkes
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A stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea Region incorporating multi-year mark-recapture data
Paper Title: A stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in the Ross ... since the late 1990s. No fishery-independent methods of monitoring stock abundance were plausible, and ... . Although tagging experiments are commonly used for assessing fish stocks, most rely on estimates of ... of tagged fish and subsequent multi-year data of recapture of tagged fish in conjunction with fishery ... tagging and tag loss are low, as under these conditions, the model maximises the use of mark-recapture ... Science, 15: 1–34. Chapman, D.G. and D.S. Robson. 1960. The analysis of a catch curve. Biometrics, 16 (3 ... Toothfish are large Nototheniids endemic to Antarctic and sub-Antarctic waters. There are two species of ... south of the Antarctic Con- vergence (Gon and Heemstra, 1990). Finfish fisheries in Antarctic waters ...
Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 39–62 : Autor(es): Mormede, S., A. Dunn and S.M. Hanchet
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Quantitative stock survey and some biological and morphometric characteristics of the deep-sea red crab Geryon quinquedens off south west Africa
processing the live material to a cooked frozen product, red crab is subject to a mass loss of about 54 per ... Abstract: In order to assess the abundance of the red crab Geryon quinquedens, two otter-trawl ... bimodal frequency distribution of female crabs was evident with modal sizes at 7.7 cm and 8.7 cm carapace ... cent. Analysis of stomach contents by volume showed that only 12 per cent of male stomachs contained 5 ...
Meeting Document : WS-CRAB-93/22 : Autor(es): C.J. De B. Beyers and C.G. Wilke (South Africa)
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Sexual dimorphism and sexual segregation in foraging strategies of northern giant petrels Macronectes halli during incubation
Abstract: Giant petrels (Macronectes spp) are the most sexually dimorphic of all seabirds. We ... used satellite-tracking and mass change during incubation to investigate the influence of sexual size ... dimorphism, in terms of the intersexual food competition hypothesis, on foraging and fasting strategies of ... , duration of foraging trips) was greater for females than for males. In contrast, foraging efficiency ...
Meeting Document : WG-FSA-99/38 : Autor(es): J. González-Solís, J.P. Croxall and A.G. Wood (United Kingdom)
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Hydrography and acoustic biomass estimates of Antarctic krill (Euphausia superba) near the South Shetland Islands, Antarctica, during January 2000: preliminary results
indicate the water flowing from the Bransfield Strait out to the offshore region around the east of King ... occurred to the north of Smith Island, north and east of King George Island and north and south of Elephant ... Abstract: To estimate the abundance and distribution of Antarctic krill (Euphausia superba) in ... the vicinity of South Shetland Islands (SSI), a hydroacoustic/oceanographic survey was conducted by ...
Meeting Document : WG-EMM-00/52 : Autor(es): D. Kang, Y. Lee, H.-C. Shin, W. Lee and S. Kim (Republic of Korea)
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Atlas of top predators from French Southern Territories in the Southern Indian Ocean
. Indeed, seabirds and seals are considered as good indicators of changes in ecosystems at differential ... mitigation actions and restricted protection of the sole coastal areas, are insufficient, especially for the ... seabirds and marine mammals forage. The first stage of most conservation planning is to identify areas that ... identify areas of high species richness (hotspots), focusing on threat level (endangered species). This ...
Meeting Document : WG-EMM-16/42 : Autor(es): K. Delord, C. Barbraud, C.-A. Bost, Y. Cherel,C. Guinet and H. Weimerskirch
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Genetic variation among populations of the Antarctic toothfish: evolutionary insights and implications for conservation
fisheries in a manner that will help prevent the loss of unique genetic variation from regional overfishing ... with over 70% of the world’s fish stocks being fully exploited and in many cases overexploited. On top ... of this, the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) has ... Southern Ocean. The primary target of these new commercial fishing ventures is the large pelagic ...
Meeting Document : WG-FSA-01/69 : Autor(es): R.W. Parker, K.N. Paige and A.L. DeVries (USA)
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Seasonal and interannual variation in foraging range and habitat of macaroni penguins Eudyptes chrysolophus at South Georgia
Abstract: In marine ecosystems, characterisation of the foraging areas and habitats of predators ... is a key factor in interpreting their ecological role. We studied the foraging areas of the macaroni ... penguin Eudyptes chrysolophus at Bird Island, South Georgia, throughout the breeding seasons of 1999 to ... between different stages of the breeding season, between sexes, between years and between individuals ...
Meeting Document : WG-EMM-02/21 Text : Autor(es): K.E. Barlow and J.P. Croxall (United Kingdom)