Resultados de la búsqueda
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Report on marine debris collected at Cape Shirreff, Livingston Island, during the 1994/95 Antarctic season
, during the present survey a total of 2,744 articles with 237.7 kg were obtained, indicating that the ... litter at Cape Shirreff was carried out in 1993/94, with a total of 1,754 articles weighing 284.29 kg ... problem of marine debris continue. The plastic was the principal item with a 90.3%; followed by glass, 5.0 ... nests, meanwhile two adult females of Arctocephalus gazella were observed with collars; only one of them ...
Meeting Document : CCAMLR-XIV/BG/24 : Autor(es): Delegation of Chile
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A preliminary assessment of mackerel icefish (Champsocephalus gunnari) in Division 58.5.2, based on results from the 2016 random stratified trawl survey
the population. These projections indicate that catches of 561 t in the 2016/17 season and 402 t in ...
Meeting Document : WG-FSA-16/26 : Autor(es): D. Maschette and D. Welsford
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Genetic analysis of Antarctic toothfish samples from the Southern Ocean to explore potential stock boundaries
58.4.2. D. mawsoni appeared to be characterized by low diversity; no genetic variation was detected with ... . It is recommended that the Ross Sea D. mawsoni be treated as a separate stock unit. Author(s): P.J ... out of seven introns digested with the restriction enzymes, but there was no population ... variation with some haplotypes restricted to sea areas. The weak genetic differentiation is supported by ...
Meeting Document : WG-FSA-04/32 : Autor(es): P.J. Smith, S.M. McVeagh (New Zealand) and P.M. Gaffney (USA)
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Collection, processing and potential use of sonar data from krill fishing vessels
Antarctic krill distribution, and potentially abundance. Data from sonars can be used independently of ... ‘Saga Sea039;, routinely use sonars, and we provide example data and swarm descriptions from these ...
Meeting Document : SG-ASAM-14/01 : Autor(es): G. Skaret (Norway) and M.J. Cox (Australia)
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An initial analysis of the characteristics of Antarctic krill taken by the commercial fishery and Antarctic fur seals during the winters of 2002 and 2003 at South Georgia
observers that should be addressed prior to more detailed analysis, nevertheless there was considerable ... ensure that other sufficient time can be allocated to other activities, especially the assessment of by ... -frequency distribution of krill at South Georgia during the winter of 2002 and 2003 and compare these with ... during winter. It may be appropriate to review the number of krill measured by observers in order to ...
Meeting Document : WG-EMM-04/62 : Autor(es): K. Reid, D.J. Agnew, N.L. Warren and E. Owen (United Kingdom)
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Development of methods for evaluating the management of benthic impacts from longline fishing using spatially explicit production models
vulnerable marine ecosystems (VMEs). We describe a spatially explicit production model that can be used to ... size of these impacts in the scenarios tested were small, we recommend that research be focused, at ... , and spatial scale, with and without management by areal closures. Further, the management action ... simulated considered a range of areal closure radii and bycatch trigger thresholds. We conclude that ...
Meeting Document : WG-SAM-10/19 : Autor(es): A. Dunn, S.J. Parker and S. Mormede (New Zealand)
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PREDICTING THE VULNERABILITY OF BENTHIC, HABITAT-FORMING ORGANISMS TO DISTURBANCE USING LIFE-HISTORY CHARACTERISTICS
revealed that there were strong, consistent relationships among life-history characteristics and with ... global patterns. To demonstrate how these relationships might be used to assess vulnerability to fishing ... data are presented for the phylum Cnidaria, an important group of habitat-forming organisms that are ... known to occur in the Southern Ocean. These data show significant relationships between growth, age with ...
Meeting Document : WG-EMM-09/35 : Autor(es): K. Martin-Smith (Australia)
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Genetic variation among populations of the Antarctic toothfish: evolutionary insights and implications for conservation
relatively small populations that would not be able to withstand heavy commercial fishing pressures. Given ... that there is evidence for significant genetic structure, it will be important to manage these ... with over 70% of the world’s fish stocks being fully exploited and in many cases overexploited. On top ... Mantel test. From a conservation perspective, low levels of genetic diversity may be indicative of ...
Meeting Document : WG-FSA-01/69 : Autor(es): R.W. Parker, K.N. Paige and A.L. DeVries (USA)
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Population dynamics of black-browed and grey-headed albatrosses Diomedea melanophrys and D. chrysostoma at Campbell Island, New Zealand, 1942–96
great reduction in long-line fishing. With stable and high adult survival rates, it is expected that ... indicates that Grey-Headed Albatrosses numbers will continue to decrease with the present demographic ... indicates that Black-browed and Grey-headed Albatrosses have similar high annual adult survival rates (0.945 ... success (0.663 compared with 0.397 for the latter species) and are annual breeders where as Grey-headed ...
Meeting Document : WG-FSA-04/58 : Autor(es): S.M. Waugh (New Zealand), H. Weimerskirch (France), P.J. Moore and P.M. Sagar (New Zealand)
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Impacts of cetaceans on the structure of Southern Ocean food webs
, in part, researchers are preoccupied with physical factors as ecosystem drivers, i.e. climate, that ... Abstract: Here we present three scenarios that demonstrate how cetaceans may influence the ... structure and dynamics of the Southern Ocean food web. These should be considered in addition to several ... nonetheless contend that they indicate fruitful directions for current and future research in the Southern ...
Meeting Document : WG-EMM-09/P04 : Autor(es): D. Ainley, G. Ballard, L.K. Blight, S. Ackley, S.D. Emslie, A. Lescroël, S. Olmastroni, S.E. Townsend, C.T. Tynan, P. Wilson and E. Woehler