Search results
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WG-FSA-06
, Gobionotothen gibberifrons and Notothenia coriiceps in the lower South Shetland Islands derived from a long-term ... antarctica as a marker for stock discrimination of Antarctic toothfish in the Ross Sea P.J. Smith, A ... . McKenzie and L. Tubbs (New Zealand) WG-FSA-06/29 A characterisation of the toothfish fishery in Subareas ... 88.1 and 88.2 from 1997/98 to 2005/06 S.M. Hanchet, M.L. Stevenson and A. Dunn (New Zealand) WG-FSA-06 ...
Meeting
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Mapping Application for Penguin Populations and Projected Dynamics (MAPPPD): Data and tools for dynamic management and decision support
Abstract: Adaptive feedback management is a core component of the ecosystem based management ... Projected Dynamics (MAPPPD) is a web-based, open access, decision support tool that would greatly assist ... ) for the region south of 60° S. A Bayesian population model integrates the available data to develop ... multiple sites to obtain abundance estimates over any user-defined area of interest. A front-end web ...
Meeting Document : WG-EMM-16/P08 : Author(s): G.R.W. Humphries, C. Che-Castaldo, R. Naveen, M. Schwaller, P. McDowall, M. Schrimpf and H.J. Lynch
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Long-term changes in the size composition of fjord Notothenia rossii, Gobionotothen gibberifrons and Notothenia coriiceps at Potter Cove, after the 1978–1980 fishery in the area
years. After 1991/92 the densities, mean sizes and abundances do not depend on a single forcing event ... but on several interacting factors. The length data of G. gibberifrons, available from 1986, show a ... decrease until 1991/92, exhibiting a similar pattern to that of N. rossii. After a period of relative ... stability in mean sizes (1992-1994) a sharp increase is associated with a continuous decline in relative ...
Meeting Document : WG-FSA-07/52 : Author(s): E.R. Marschoff, E.R. Barrera-Oro and N.S. Alescio (Argentina)
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Assessment models for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea including data from the 2005/06 season
reference case resulted in a much higher estimate of initial biomass, though this appeared to be almost ... those presented in 2005. The inclusion of the 2005 tag-release and the 2006 tag-recapture data had a ... small effect that slightly modified estimates from the models, suggesting that the new data had a ... are also presented. Inclusion of all vessels tagging data resulted in a more optimistic assessment ...
Meeting Document : WG-FSA-06/60 : Author(s): A. Dunn and S.M Hanchet (New Zealand)
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Defining predator foraging ranges, illustrated using Adélie penguin foraging tracks from Mawson coast
likely to be foraged by predators from one year to the next, i.e. what is a predator’s feeding range ... location/time recordings from a satellite tracking system. This data is used to generate a map of feeding ... effort and this is used to delineate a feeding ground for Adélie penguins on the Mawson coast in eastern ... . summer vs winter. The second part is to establish the combined foraging ranges across a number of species ...
Meeting Document : WG-EMM-02/41 : Author(s): I.R. Ball, A.J. Constable, J. Clarke and L. Emmerson (Australia)
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Modelling Southern Ocean krill population dynamics: biological processes generating fluctuations in the South Georgia ecosystem
Abstract: Variability is a key feature of the pelagic ecosystems of the Southern Ocean and an ... dynamics in the observed variation. Here, analyses of a model of krill population development and predator ... . The krill population model was combined with a size-based selection function and used to generate ... expected length-frequency distributions in the predator diet through a summer season. Comparison of the ...
Meeting Document : WG-EMM-01/53 : Author(s): E. Murphy and K. Reid (United Kingdom)
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Modelling the dynamics of krill populations in the Antarctic Peninsula region
population dynamics of krill and estimate the expected mortality rates. A number of models of the population ... the bulk density estimates and uses a non-linear regression method to estimate the mortality rate. The ... second method develops a fully age-structured population model and uses only the recruitment data to ... develop a model of the long-term dynamics. Data on the recruitment of the first and second age groups were ...
Meeting Document : WG-EMM-99/56 : Author(s): E.J. Murphy (United Kingdom), A. Constable (Australia) and D. Agnew (United Kingdom)
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Observer sampling requirements for Dissostichus spp.
48.2, 48.5, 58.4.4a, 58.4.4b, 88.3 D. mawsoni n/a 35 10 D. eleginoides n/a 35 10 48.6, 58.4.1 ... , 58.4.2, 58.4.3a D. mawsoni n/a 35 10 D. eleginoides n/a 35 10 88.1, 88.2 D. mawsoni n/a 35 10 D ... . eleginoides n/a 35 10 To help ensure that the work of observers is not unduly impacted by such operational ... changes, the sampling rate should be up to 7 fish per 1 000 hooks. As a practical procedure to achieve the ...
Page : Site Section: Science
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Establishing time-limited Special Areas for Scientific Study in newly exposed marine areas following ice shelf retreat or collapse in Subarea 48.1, Subarea 48.5 and Subarea 88.3 – Clarifications and options to further develop the 2015 proposal
Abstract: In 2015 the European Union proposed a draft Conservation Measure (CM) with the aim of ... for Scientific Study in such areas, with a designated 10-year study period during which time there ... would be a moratorium on all fishing activities, except for scientific research fishing activities ... undertaken in accordance with Conservation Measure 24-01. This proposal was developed following a ...
Meeting Document : WG-EMM-16/27 : Author(s): S. Grant and P. Trathan
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Spawning pattern and type of fecundity in notothenioids collected around the Elephant and South Orkney Islands
georgianus) was carried out, in females collected during a fishery research survey around the Elephant Island ... development, while the determination of RF was performed by a gravimetric method. Five were the main ... the less developed group showed a polymodal pattern in C. aceratus and N. rossi; (iii) in hydrated ... ovaries of P. georgianus a trimodal structure was visible, containing immature oocytes (<0.9 mm ...
Meeting Document : WG-FSA-16/22 : Author(s): G. Plaza, P.M. Arana, F. Becker, A. Zavatteri and V.H. Castillo