Search results
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Spatial aggregation of harvesting in Subarea 48.1, in particular during the summer and close to the coast
in detail, the fishing patterns in Subarea 48.1 during 2014/2015, showing that two areas of fishing ... aggregation took place, one in the Bransfield Strait and one in Hughes Bay, on the Danco Coast. The latter ... operated, collectively taking over 42,000 tonnes of krill from an area less than 30 km in diameter ... at the end of the first two periods, but were increasing at the end of the third period when the Subarea ...
Meeting Document : WG-EMM-16/17 : Author(s): P. Trathan and S. Hill
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The reliability of VHF telemetry data for measuring attendance patterns of marine predators: a comparison with Time Depth Recorder data
Abstract: VHF radiotelemetry data has been used for over thirty years to monitor the behavior ... , there were significant differences in the number and duration of attendance bouts between the two instrument ... and decreasing cost over the last thirty years, TDRs are a more appropriate means to collect attendance data ... VHF radiotelemetry data has been used for over thirty years to monitor the behavior patterns ...
Meeting Document : WG-EMM-15/P05 : Author(s): A.D. Lowther, H. Ahonen, G. Hofmeyr, W.C. Oosthuizen, P.J. Nico De Bruyn, C. Lydersen and K. Kovacs
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POPULATION ASSESSMENTS OF GENTOO PENGUINS (PYGOSCELIS PAPUA) BREEDING AT AN IMPORTANT ANTARCTIC TOURIST SITE, GOUDIER ISLAND, PORT LOCKROY, PALMER ARCHIPELAGO, ANTARCTICA
Peninsula; it is one of the most frequently visited tourist sites in Antarctica. A number of gentoo penguin ... (Pygoscelis papua) breeding colonies are located on the island and these have been the focus of one ... consecutive years beginning in the 1996/1997 breeding season. Our results demonstrate that all colonies show ... . Of the six visited colonies, two showed an important and significant statistical decline in the number ...
Meeting Document : WG-EMM-09/P07 : Author(s): P.N. Trathan, J. Forcada, R. Atkinson, R.H. Downie and J.R. Shears
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Entanglement of Antarctic fur seals Arctocephalus gazella in man made debris at Bird Island, South Georgia during the 1998 winter and 1998/99 pup-rearing season
records started. Two animals (15 %) were entangled in polypropylene straps, down by 50 % on the 1997 ... of animals showing severe injuries (30 %) was a contrast to 1997/98 when none was noted. Entanglements ... was 39 %, up threefold on the 1997 winter and the third highest total since records started. Two animals ... on the 1997 winter total and an 87 % decrease on the highest previous total (1992). The proportion of animals ...
Meeting Document : SC-CAMLR-XVIII/BG/05 : Author(s): Delegation of the United Kingdom
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SOUTHERN OCEAN SENTINEL: AN INTERNATIONAL PROGRAM TO ASSESS CLIMATE CHANGE IMPACTS ON MARINE ECOSYSTEMS
Abstract: Assessment and predictive models need to be developed to provide two assessments ... a Southern Ocean Sentinel program’, which was held at CCAMLR Headquarters in Hobart, Australia, on 20-24 ... ;to provide two assessments of climate change impacts for use ... Headquarters in Hobart, Australia, on 20-24 April 2009. ...
Meeting Document : SC-CAMLR-XXVIII/BG/17 : Author(s): Delegation of Australia
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A perspective on steepness, reference points, and stock assessment
for steepness. Ways out of the difficult situation raised by fixing steepness and life history parameters ... for steepness. Ways out of the difficult situation raised by fixing steepness and life history parameters ...
Meeting Document : WG-FSA-14/P05 : Author(s): M. Mangel, A.D. MacCall, J. Brodziak, E.J. Dick, R.E. Forrest, R. Pourzand and S. Ralston
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Stock structure of Antarctic toothfish in Statistical Area 88 and implications for assessment and management
, growth dynamics, and egg and larval dispersal simulations. Taken together, the information suggests two ... , and egg and larval dispersal simulations. Taken together, the information suggests two biological stocks ...
Meeting Document : WG-SAM-14/26 : Author(s): S.J. Parker, S.M. Hanchet and P.L. Horn (New Zealand)
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Estimation of natural mortality using catch-at-age and aged mark-recapture data: a simulation study comparing estimation for a model based on the Baranov equations versus a new mortality equation
were generated for 12 years of fishing. Two alternative estimation models were programmed in R. Both ... generated for 12 years of fishing. Two alternative estimation models were programmed in R. Both use the same ... -structured population for each fishing year by annual recursive use of difference equations for population ... numbers at age obtained by integrating a first order ordinary differential equation (ODE) for within-year ...
Meeting Document : WG-SAM-10/11 Rev. 1 : Author(s): S.G. Candy (Australia)
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Proposal for a CCAMLR-sponsored research survey to monitor abundance of pre-recruit Antarctic toothfish in the southern Ross Sea
years in Subarea 88.1 and for nine years in Subarea 88.2. The research and assessment work ... to an estimate of the fisheries potential yield. However, one source of ongoing uncertainty in the stock ... locations in different years, making it impossible to develop a consistent time series that would monitor ... request. We propose that the first survey be a pilot, with two main objectives: (i) To establish ...
Meeting Document : SC-CAMLR-XXX/07 : Author(s): Delegation of New Zealand
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A statistical method for analysing the extent of IUU fishing in CCAMLR waters: application to Subarea 48.3
/01. Each year covered fully the period 1 October – 30 September, thus including one summer and one ... fully the period 1 October – 30 September, thus including one summer and one winter period ... the total number of days of IUU fishing that could occur during each year. For each IUU incident detected ... model. For each year, the model simulated 1000 IUU fishing incidents during the year, and from the known ...
Meeting Document : WG-FSA-02/4 : Author(s): D.J. Agnew and G.P. Kirkwood (United Kingdom)