Resultados de la búsqueda
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Developing integrated assessments for Dissostichus eleginoides based on the CCAMLR precautionary approach
Abstract: This paper describes a possible method for implementing the precautionary approach in ... Dissostichus eleginoides in Division 58.5.2. CASAL and GYM are key elements in the implementation described in ... this paper but the methodology is laid out in such a way that alternative software solutions could be ... used in either or both of their places. The framework for this procedure has four main components. The ...
Meeting Document : WG-FSA-SAM-05/16 : Autor(es): I. Ball and A.J. Constable (Australia)
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Population dynamics of the wandering albatross Diomedea exulans at Marion Island: long-line fishing and environmental influences
in the Marion Island population has fluctuated over the past three decades and appears to be the ... result of both real changes in the size of the population and changes in the proportion of the population ... that attempts to breed in a given year. Changes in several demographic parameters that appear to be ... breeders in the population was positively correlated with the maximum ENSO index, whereas the annual ...
Meeting Document : WG-EMM-03/11 : Autor(es): D.C. Nel, F. Taylor, P.G. Ryan and J. Cooper (South Africa)
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The Ross Sea, Antarctica, where all ecosystem processes still remain for study
scientific effort has been invested in studies of the geology, physics and biology of the Ross Sea over the ... past 45 years. In particular the activities of the US, NZ and Italian Antarctic programs have been a ... wealth of knowledge, including long-term biological data sets, not available anywhere else in the ... scientific resource. The Ross Sea represents an unparalleled natural laboratory in which the results of ...
Meeting Document : WG-EMM-02/60 : Autor(es): D. Ainley (USA)
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Population dynamics of wandering albatrosses Diomedea exulans at sub-Antarctic Marion Island: longline fishing and environmental influences
Wandering Albatross Diomedea exulans. The number of birds breeding in this population has fluctuated over ... the past three decades and appears to be the result of both real changes in the size of the population ... and changes in the proportion of the population that attempts to breed in a given year. We describe ... changes in several demographic parameters that appear to be influenced by both environmental and ...
Meeting Document : WG-FSA-02/16 : Autor(es): D.C. Nel, P.G. Ryan and J. Cooper (South Africa)
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Report to CCAMLR-XXIX on the implementation of the Agreement on the Conservation of Albatrosses and Petrels
revealed that the most effective measures to reduce incidental take of seabirds in pelagic longline ... ;- setting at night; and- actively deterring birds from baited hooks by means of bird scaring lines, in ... combination with appropriate line weighting. The SBWG also reviewed progress in bycatch mitigation research ... take of seabirds in trawl fisheries is the effective management of offal discharge and fish discards ...
Meeting Document : CCAMLR-XXIX/BG/18 : Autor(es): ACAP Secretariat
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Estimation of natural mortality for the Patagonian toothfish at Heard and McDonald Islands using catch-at-age and aged mark-recapture data from the main trawl ground
other model parameters in integrated assessments via CASAL for the Heard and McDonald Islands (HIMI ... to the main trawl ground in which the longest time series of catches and the great majority of ... years 1998 to 2008. A large proportion of the recaptures of fish released in this fishery were aged and ... programmed in R, based on alternative ordinary differential equations (ODE) for within-year population ...
Meeting Document : WG-FSA-10/41 : Autor(es): S. Candy, D. Welsford, T. Lamb, J. Verdouw and J. Hutchins (Australia)
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An integrated assessment model for Antarctic krill: progress update
extrapolated from net densities than when biomass was calculated from acoustics. This was reflected in lower ... net biomass densities in either TrawlCI or the integrated model than when acoustic measures of biomass ... ages in the population. Thus the integrated model estimated two population sizes, the "vulnerable ... " population sizes in the integrated models were usually more similar to TrawlCI estimates of ...
Meeting Document : WG-EMM-12/27 : Autor(es): D. Kinzey, G. Watters and C. Reiss (USA)
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Potential climate change effects on the habitat of Antarctic krill
resource and a major prey item for many fish, birds and mammals in the Southern Ocean. The fishery and the ... sector into two zones: A band around the Antarctic Circumpolar Current in which habitat quality is ... in growth habitat within the range of predators, such as Antarctic fur seals, foraging from breeding ... in summer chlorophyll concentration could have a more significant effect on Antarctic krill habitat ...
Meeting Document : WG-EMM-13/20 : Autor(es): S.L. Hill, T. Phillips and A. Atkinson (United Kingdom)
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Marine debris and entanglements at Bird Island and King Edward Point, South Georgia, Signy Island, South Orkneys and Goudier Island, Antarctic Peninsula 2013–2014
Point and zero at Signy Island and Goudier Island. In total, 88 items of marine debris were found in ... association with seabird colonies at Bird Island, most commonly in association with wandering albatrosses (40 ... highest ever recorded in the 24 years of summer surveys and fourth highest ever recorded in 23 years of ... winter surveys at Bird Island. In contrast, the occurrence of beached marine debris at Signy Island was ...
Meeting Document : SC-CAMLR-XXXIII/BG/31 : Autor(es): Delegation of the United Kingdom
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UAV for monitoring environmental changes on King George Island (South Shetland Islands) Antarctica: preliminary study on wildlife disturbance
Abstract: The importance of Unmanned Aerial Vehicles (UAVs) in remote sensing is rapidly growing ... . However, knowledge about their potential impact on wildlife is scant, especially in the Antarctic, where ... they are a new tool used in ecological research and monitoring. In this preliminary study we ... investigate potential effects of wildlife disturbance by UAVs. In austral summer 2014-2015 UAV overflights ...
Meeting Document : WG-EMM-15/50 : Autor(es): A. Kidawa, M. Korczak-Abshire, A. Zmarz, R. Storvold, M. Rodzewicz, K. Chwedorzewska, S-R. Karlsen and A. Znój (Poland)