Resultados de la búsqueda
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Stable isotope analysis of Southern Ocean fish tissue samples to investigate trophic linkages of Antarctic toothfish (Dissostichus mawsoni)
of the species sampled, on the order of 3-4 ‰ for?15N (which equates to one trophic level) and 4 ... Abstract: Flesh tissue samples were collected by scientific observers on-board New Zealand ... Atlantic, and sperm whales from the Gulf of Mexico. There was high variance in?15N and?13C values for each ... ‰ for?13C (suggesting multiple primary sources of organic matter). For each species where sufficient ...
Meeting Document : WG-EMM-07/19 : Autor(es): M.H. Pinkerton, S. Bury, S.M. Hanchet and D. Thompson (New Zealand)
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Spatial variability and power to detect regional-scale trends
Abstract: An important issue in regional-scale trend detection is the degree of concordance in ... trend between sites in relation to an average regional trend. If there is much or more variability ... power for various multiple-site monitoring scenarios. Under the conservative, hypothetical scenarios we ... extreme, monitoring at all sites in a region (a census) may be an unnecessary use of resources because the ...
Meeting Document : WG-EMM-03/47 : Autor(es): C. Southwell and L. Emmerson (Australia)
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Workshop Report – The Ross Sea: Science, Policy and the Public in a Pristine Marine Ecosystemt
Sea: on the basis that its northwestern shelf was an unglaciated refuge during recent glacial maxima ... , coincide closely with the criteria agreed to by the UN Convention for Biological Diversity to identify ... , and that its fauna, especially its notothenioid fish, now comprise a unique evolutionary radiation on ... Lakes, Lake Baikal); on the basis of projections made from current models in the IPCC array, it likely ...
Meeting Document : WG-EMM-09/14 : Autor(es): J. Weller and D.G. Ainley (USA)
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BEACH DEBRIS SURVEY – MAIN BAY, BIRD ISLAND, SOUTH GEORGIA 1995/96
bands found ashore was the highest for many years, as was the proportion of these which were uncut ... itself an 8-fold increase over any earlier value. Nylon line, identical with that attached to longline ... gear, accounted for 77% of items, nearly all of which clearly originated from fishing vessels. The ... CCAMLR ban on the use of packaging bands being in force during 1995/96, the total number of packaging ...
Meeting Document : CCAMLR-XVI/BG/4 : Autor(es): Delegation of the United Kingdom
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Diets of Antarctic toothfish estimated from fatty acids and stable isotopes
Antarctic toothfish, by-catch and their stomach contents were collected for the past five years in the eight ... recently developed mixing model calculation for FA profiles and SI values, which follows the Bayesian ... whole population level. In contrast, the model calculations provided an estimation of dietary shift ... shifts on the nonmetric multidimensional scaling plot and the SOM map by realistic diet proportions ...
Meeting Document : WG-FSA-17/12 : Autor(es): C.-K. Kang, S.-G. Choi, J. Lee, J. Lee and D. An
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Entanglement of Antarctic fur seals (Arctocephalus gazella) in man-made debris at Signy Island, South Orkney Islands 1996/97
seen on 12 seals, all of which were juvenile males. Five entangled seals were observed in an area ... Island, South Orkney Islands are reported for the 1996/97 season. Neck collars of man-made debris were ... reported at Signy Island compared with only 20 entanglements recorded at sites in the South Shetland ... discarded at sea within the Convention area. This is despite the ban by CCAMLR on the use of packaging bands ...
Meeting Document : SC-CAMLR-XVI/BG/07 : Autor(es): Delegation of the United Kingdom
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A preliminary examination of the length–weight relationship in Dissostichus eleginoides and D. mawsoni using data from the CCAMLR Scheme of Scientific Observation
Abstract: An investigation into use the length-weight relationship of Dissostichus eleginoides ... and D. mawsoni to separate the two species was undertaken using data from the CCAMLR Scheme of ... Scientific Observation. Although the ability to discriminate the two species using length and weight ... measurement was inconclusive the process provided an opportunity to examine the variation in biometrics of ...
Meeting Document : WG-FSA-11/21 : Autor(es): Secretariat
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Modelling availability bias using existing time series count data: Adélie penguins as a case study
. A count of some attribute of the population on any date may therefore need to be adjusted by some ... date-specific factor (termed the availability fraction) if the count is to form the basis of an ... of sites and years around Antarctica were modelled using quantile regression to estimate the range of ... through December. Implications for the planning of future regional scale surveys of land-based predators ...
Meeting Document : WG-EMM-04/54 : Autor(es): L. Emmerson, B. Raymond and C. Southwell (Australia)
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The Status of the Champsocephalus gunnari Stock in the South Georgia Area
Abstract: This study focuses on the Chamsocephahus gunnari stock around South Georgia. The ... the relationship between the spawning stock and number of recruits. A conventional VPA and an ad hoc ... tuning method are used to estimate biomass levels and fishing mortality for the period 1971/72 to 1988/89 ... observed in recent years cannot be sustained. There is no clear relationship between the size of the ...
Meeting Document : WG-FSA-89/8 Rev. 1 : Autor(es): M. Basson, J. Beddington (United Kingdom) and W. Ślósarczyk (Poland)
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Population trends of albatrosses and petrels at sub-Antarctic Marion Island
Abstract: We report on the population changes of five species of Procellariiform seabirds ... the last 16-18 years. All were stable or decreasing during the 1980s, followed by a recovery period ... Unreported (IUU) longline fishing for Patagonian toothfish (Dissostichus eleginoides) close to Marion Island ... and an effective means of dealing with IUU longline fishing seem necessary to reduce the potential ...
Meeting Document : WG-FSA-01/11 : Autor(es): D.C. Nel, P.G. Ryan, R.J.M. Crawford, J. Cooper and O. Huyser (South Africa)