Resultados de la búsqueda
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Are penguins and seals in competition for Antarctic krill at South Georgia?
) satellite-tracking data to investigate the spatial separation of these two species whilst at sea during the ... consumers of Antarctic krill. In recent years the population of fur seals has increased whereas that of ... macaroni penguins has declined. Both species feed on krill of similar size ranges, dive to similar depths ... and are restricted in their foraging range at least while provisioning their offspring. In this study ...
Meeting Document : WG-EMM-01/22 : Autor(es): K.E. Barlow, I.L. Boyd, J.P. Croxall, I.J. Staniland, K. Reid and A.S. Brierley (United Kingdom)
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CEMP cameras data validation experiment at the Galindez Island gentoo penguin (Pygoscelis papua) colonies
cameras of the CEMP camera monitoring project of CCAMLR at Galindez Island gentoo (Pygoscelis Papua ... Abstract: The two seasons of the data validation experiment provided for pictures from time-lapse ... ) penguin colonies are discussed. During 2017/18 and 2018/19 seasons, biologists-winterers at Vernadsky ... station (Galindez Island), GAI CEMP site, provided daily observations of 15 gentoo nests chosen in the ...
Meeting Document : WG-EMM-2019/59 : Autor(es): P. Khoetsky, A. Dzhulai, V. Smagol, G. Milinevsky, I. Dykyy, A. Simon, M. Telipska, E. Dykyi, I. Parnikoza and L.Pshenichnov
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Fishing equipment, marine debris and hydrocarbon soiling associated with seabirds at Bird Island, South Georgia, 2006/07
reflecting discard of used baited hooks at sea. Entanglements continue to be observed with hooks being ... Abstract: This report describes and quantifies occurrences of fishing gear, marine debris and oil ... associated with seabirds at Bird Island, South Georgia from 1 April 2006 to 31 March 2007. It is the ... fourteenth such annual report. As in previous years, more items of marine debris and fishing gear (mostly ...
Meeting Document : SC-CAMLR-XXVI/BG/18 : Autor(es): Delegation of the United Kingdom
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Using mark-recapture and catch-age data to estimate fishing and natural mortality for the Patagonian toothfish at South Georgia
, while fishing mortality-at-age was estimated, only one value of the natural mortality was permitted, as ... . There was additionally some suggestion of agestructure in the natural mortality-at-age. Author(s): R.M ... natural mortality, and integrates catch-at-age data into the estimation model, to aid in distinguishing ... against simulated data, and performed as expected. Mark-recapture data from toothfish at South Georgia was ...
Meeting Document : WG-FSA-SAM-06/06 : Autor(es): R.M. Hillary and D.J. Agnew (United Kingdom)
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ADDING CATCH AT AGE AND SURVEY DATA TO THE 48.3 TOOTHFISH CASAL ASSESSMENT
using short runs of catch-at-age data and the catchability being estimated by the survey. Estimates of ... Abstract: The catch-at-age based CASAL model for toothfish in Subarea 48.3, which was presented ... retardation period and rate of tag loss. When these factors are included in the model the fits to the tag ... recaptures at size improve. However, there is still some evidence for a sex-based influence on the fits ...
Meeting Document : WG-SAM-09/13 : Autor(es): D.J. Agnew and M. Belchier (United Kingdom)
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Unusual breeding by seabirds at Marion Island during 1997/98
these penguins, the mass of adults on arrival at colonies decreased substantially in the following (1998 ... Abstract: In 1997/98, breeding at subantarctic Marion Island was exceptionally good for five ... species of seabirds capable of foraging over wide areas and for a tern. The number of king penguin ... Aptenodytes patagonicus chicks surviving to the start of spring in 1997 was considerably more than previously ...
Meeting Document : WG-EMM-03/13 : Autor(es): R.J.M. Crawford, C.M. Duncombe Rae, D.C. Nel and J. Cooper (South Africa)
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Seabird mortality in the longline fishery for Patagonian toothfish at the Prince Edward Islands: 1996–1997
Abstract: Longline fishing for Patagonian toothfish Dissostichus eleginoides commenced at the ... . This paper summarizes the mortality of seabirds associated with this fishery during the year July 1996 ... -June 1997. Data on seabird bycatches were obtained from fishery observers aboard 10 of 12 sanctioned ... fishing trips. Some 3.2 million hooks were observed during the period November-June, representing 84 % of ...
Meeting Document : WG-FSA-97/51 : Autor(es): Boix-Hinzen, C., Enticott, J.W., Ryan, P.G., Wanless, R., Purves, M., Nel, D.C.
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Marine ecosystem acoustics (MEA): quantifying processes in the sea at the spatio-temporal scales on which they occur
-space scales at which they occur, which is essential for some of the management challenges of CCAMLR ... monitoring. Realistic understanding of what can and cannot be achieved with the available sampling techniques ... and strategies is essential. This paper focuses on approaches for observing processes at the time ... , for example the FBM. Sustainable management of fisheries resources requires quantitative knowledge ...
Meeting Document : WG-EMM-15/P01 : Autor(es): O.R. Godø, N.O. Handegard, H.I. Browman, G.J. Macaulay, S. Kaartvedt, J. Giske, E. Ona, G. Huse and E. Johnsen
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Are penguins and seals in competition for Antarctic krill at South Georgia?
krill of similar size ranges, dive to similar depths and are restricted in their foraging range at least ... population at South Georgia may have resulted in greater competition for the prey of macaroni penguins ... spatial separation of the Bird Island populations of these two species whilst at sea during the breeding ... , respectively, the main mammal and bird consumers of Antarctic krill (Euphausia superba). In recent years the ...
Meeting Document : WG-EMM-02/22 : Autor(es): K.E. Barlow, I.L. Boyd, J.P. Croxall, K. Reid, U.J. Staniland and A.S. Brierley (United Kingdom)
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Marine pollutants and fishing gear associated with seabirds at sub Antarctic Marion Island, 1996–1998: trends in relation to longline fishing activity
Abstract: Pollutants found in association with seabirds at subantarctic Marion Island for the ... increase between the 1996/97 and the 1997/98 field seasons. Fishing gear increased at a rate ten times ... toothfish in blastfreezers and 23 toothfish hooks were found. All the rope nooses, and 19 of the-books were ... view of the fact that the large influx of illegal toothfish vessels to the Prince Edward Islands waters ...
Meeting Document : CCAMLR-XVII/BG/26 : Autor(es): Delegation of South Africa