Search results
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Human activity and disturbance: building an Antarctic site inventory
Abstract: There have been numerous human intrusions in the Antarctic Peninsula and west of the ... Peninsula. The region is where many Antarctic research stations are situated, and also where the bulk of ... Antarctic shipboard tourism takes place. A brief summary of this human history in Antarctica reveals a wide ... range of real and possible disturbances. Potential impacts from human activities continue to exist–and ...
Meeting Document : WG-EMM-98/09 : Author(s): R. Naveen, Oceanites (USA)
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THE WHITE-CHINNED PETREL (PROCELLARIA AEQUINOCTIALIS) ON SOUTH GEORGIA: POPULATION SIZE, DISTRIBUTION AND GLOBAL SIGNIFICANCE
fisheries than probably any other seabird in the world, but the population impact of this mortality is ... poorly understood, partly because there have been no estimates of the species’ abundance in recent ... decades. The largest breeding aggregation, comprising the majority of the worldwide total, is believed to ... be on the sub-Antarctic island of South Georgia. We estimated the size of this population by ...
Meeting Document : WG-EMM-PSW-08/05 : Author(s): A.R. Martin, S. Poncet, C. Barbraud, P. Fretwell and E. Foster (United Kingdom)
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An integrated assessment model for Antarctic krill: progress update
Abstract: Estimates of population parameters from different configurations of an integrated model ... trawl data. The different configurations of the integrated model were varied based on whether acoustic ... weighted, by whether natural mortality was estimated by the model or pre-assigned a value of 0.8, and by ... whether a narrow or wide version of the age-length transition matrix was used. The biomass data calculated ...
Meeting Document : WG-EMM-12/27 : Author(s): D. Kinzey, G. Watters and C. Reiss (USA)
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Beach debris survey Signy Island, South Orkney Islands 1999/2000
size categories. A total of 55 items weighing 10.78kg was collected. The number of items was 35% less ... than 1998/99, and the second lowest ever recorded. The total mass of the waste recovered has decreased ... in previous seasons, although the proportion of plastic items (38%) was the lowest ever recorded and ... follows a declining trend since 1996/97. The proportion of polypropylene packaging bands removed was also ...
Meeting Document : SC-CAMLR-XIX/BG/06 : Author(s): Delegation of the United Kingdom
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Beach litter survey, Signy Island, South Orkney Islands 1994/95
origin noted. At Foca Cove, a total of 91 items were found with a combined weight of 18.26 kg. At ... Cummings Cove, a total of 90 items were found (22.79 kg) and at Starfish Cove, a total of 27 items were ... dumping of rubbish from ships or discarded gear from fishing vessels, rather than from either of the ... scientific research stations in the South Orkney Islands. For example, only six of the 208 items recovered ...
Meeting Document : CCAMLR-XIV/BG/15 : Author(s): Delegation of the United Kingdom
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Small scale krill surveys: simulations based on observed euphausiid distributions
Abstract: An observed distribution of Meganyctiphanes norvegica aggregations is used to examine ... the effects of krill swarm orientation and shape on the success of two proposed survey designs. The ... simulation involves a number of random paths of parallel or radially arranged transects passing through three ... distributions each of which is given 4 rotations. The results indicate that the coefficient of variation (c.v ...
Meeting Document : WG-KRILL-91/19 : Author(s): D.J. Agnew (Secretariat) and S. Nicol (Australia)
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Physical and behavioural influences on larval fish retention: contrasting patterns in two Antarctic fishes
retention of the planktonic stages (eggs and larvae) of marine fish can play a key role in the maintenance ... of adult stocks. Here we use a numerical modelling approach to examine the influence of oceanographic ... and life history variability on the dispersal and retention of two species of Antarctic fish ... : Champsocephalus gunnari (mackerel icefish) and Notothenia rossii (marbled rockcod). Mean retention of N. rossii ...
Meeting Document : WG-FSA-12/P10 : Author(s): E.F. Young, J. Rock, M.P. Meredith, M. Belchier, E.J. Murphy and G.R. Carvalho
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Marine debris surveys at Bird Island, South Georgia 1990 to 1995
Abstract: The Antarctic marine environment has relatively few direct sources of man-made marine ... debris; however, there is concern over the dangers posed to wildlife by increasing amounts of such debris ... . Between 1990 and 1995 beached debris was monitored at Bird Island, South Georgia. This was part of a ... programme developed by the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) to ...
Meeting Document : CCAMLR-XV/BG/05 : Author(s): Delegation of the United Kingdom
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Uncertainty in standard sphere calibrations
Abstract: In fisheries acoustics, the standard sphere method of echosounder calibration is most ... method, a series of experiments were conducted in a deep tank (Demer and Hewitt, 1993). Results indicated ... that variations in pulse length (0.1 and 0.3 ms), water temperature (0.5 to 5.5 C), and choice of ... variations in the system gains of 0.3, 0.2 and 1.5 dB, respectively. Additionally, system gain values ...
Meeting Document : WG-EMM-95/70 : Author(s): Demer, D.A., Hewitt, R.P.
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Note sur l'étude d'évaluation de l'impact des pêcheries sur les populations de pétrels à menton blanc Procellaria aequinoctialis et de pétrels gris Procellaria cinerea aux îles Crozet et Kerguelen
Abstract: This study reviews the impact of longline fishing on populations of white-chinned ... shows that the population of white-chinned petrels at Possession Island (Crozet) decreased sharply ... decrease in the population was more marked as a result of previous levels of incidental mortality. At ... present, the level of mortality of white-chinned petrels in Subarea 58.6 has not reached the critical ...
Meeting Document : SC-CAMLR-XXVI/BG/22 : Author(s): Délégation française