Resultados de la búsqueda
-
Approaches to data collection and analysis for detecting and quantifying functional overlap at the scale of the individual vessell
Abstract: Summary Over the past years, the subject of whether there is a functional overlap ... Groups. Specifically, these discussions centre around two key issues: a) whether there are potential ... , and b) how krill acoustic surveys and transects could also be used to provide data for wider ecosystem ... monitoring. The Scientific Committee noted that consideration is needed on what specific scientific questions ...
Meeting Document : WG-EMM-18/33 : Autor(es): M. Söffker and N. Gasco
-
In situ target strength measurements of Antarctic zooplankton (Euphausia superba and Salpa thompsoni) at 120 khz and 200 khz, corroboration of scattering models, and a statistical technique for delineating species
scattering models and empirically derived distributions of animal sizes, a technique is developed for ... echograms included dense swarms with virtually equivalent Sv at the two frequencies. The ability for this ... method to delineate salps from krill is highly dependent on the degree to which the two CDF's differ ... (Euphausia superba and Salpa thompsoni) at 120 kHz and 200 kHz. Concurrently, a two meter Isaacs-Kidd ...
Meeting Document : WG-Krill-94/12 : Autor(es): D.A. Demer and R.P. Hewitt (USA)
-
Committee for Environmental Protection: 2016 Annual Report to the Scientific Committee of CCAMLR
meeting. The terms of reference for the workshop focused primarily on two areas of overlapping interest ... Abstract: Cooperation between the Scientific Committee of CCAMLR (SC-CAMLR) and the Committee for ... Environmental Protection (CEP) has been steadily increasing over the last few years to the mutual benefit of ... both. In order to avoid duplicate reporting between the two committees, and following discussions ...
Meeting Document : SC-CAMLR-XXXV/BG/09 : Autor(es): CEP Observer to SC-CAMLR (Dr P. Penhale, USA)
-
Assessment models for Patagonian toothfish in research block 5843a_1 of Division 58.4.3a, Elan Bank
Abstract: I made two sensitive runs of CASAL catch at length models (LENGTH_MODEL) for stock ... years 2004/05 to 2012/13 following the recommendation during the last WG-SAM meeting. The two models are ... between the two models were set as follows: year class strength (YCS) was fixed; parameters of ALK were ... status assessments of Dissostichus eleginoides in research block 5843a_1 in Division 58.4.3a for the ...
Meeting Document : WG-FSA-14/22 : Autor(es): K. Taki (Japan)
-
Fitting a von Bertalanffy growth model to length-at-age data accounting for length-dependent fishing selectivity and length-stratified sub-sampling of length frequency samples
both age and measure for length there are two potential response-biased sampling processes when length ... process involving a particular gear, and (ii) the method of on-deck sub-sampling fish for ageing from the ... used to estimate the von Bertalanffy parameters for simulated and real data on the growth of the ... ) then both these sampling processes are response-biased. Response-biased sampling and its effect on ...
Meeting Document : WG-FSA-SAM-05/13 : Autor(es): S.G. Candy (Australia)
-
Scientific contribution to the 2016 review of Conservation Measure 51-07: Part 2 – outcomes from the application of the risk assessment framework for distributing the krill trigger level in Area 48
for distributing the krill trigger level in Area 48, which was described in Part 1 of this work (WG ... -FSA-16/47). This second part has two additional components of work: (i) results of the analyses using ... , including consideration of the matters raised by WG-EMM in 2016. The framework presented in Part 1 is shown ... to enable assembling relevant data on krill, predators, management and the fishery to assess the ...
Meeting Document : WG-FSA-16/48 Rev. 1 : Autor(es): A. Constable (on behalf of the e-group on CM 51-07 WG-EMM review)
-
The annual random stratified trawl survey in the waters of Heard Island (Division 58.5.2) to estimate the abundance of Dissostichus eleginoides and Champsocephalus gunnari for 2015
of 2014 and two and a half times that of the long-term average for the survey. The C. gunnari catch ... this year meant that 333 sets of otoliths were collected for L. squamifrons, 499 for C. rhinoceratus ... 2015, with the completion of 163 stations, an additional five stations compared with previous surveys ... . The extra five hauls were part of a redesign of the survey on the main trawl ground which consisted of ...
Meeting Document : WG-FSA-15/11 : Autor(es): G.B. Nowara, T.D. Lamb and D.C. Welsford (Australia)
-
Marine Ecosystem Assessment for the Southern Ocean (MEASO)
held in Hobart in early April 2018 (http://www.measo2018.aq/). The conference provided an opportunity ... from the field programmes are also being summarised, based on an open, international survey of ... researchers. For this survey, an indication of where and when national research programmes have conducted ... Abstract: A first Marine Ecosystem Assessment for the Southern Ocean (MEASO) is under development ...
Meeting Document : SC-CAMLR-XXXVII/BG/22 : Autor(es): A. Constable, J. Melbourne-Thomas, R. Trebilco and M. Brasier
-
DEVELOPMENT OF RECOVERY PLANS FOR DEPLETED TOOTHFISH STOCKS IN THE INDIAN OCEAN SECTOR OF THE SOUTHERN OCEAN
years and then two years later. The surveys should have only low catches in order to not impede recovery ... recovery strategy for Patagonian toothfish on Ob and Lena Banks. Author(s): D.C. Welsford, A.J. Constable ... Abstract: Stocks of Dissostichus mawsoni on BANZARE Bank (Division 58.4.3b) and D. eleginoides on ... and commercial fishing and it is likely that they are depleted below the threshold for CCAMLR ...
Meeting Document : WG-FSA-09/44 : Autor(es): D.C. Welsford, A.J. Constable and J.P. McKinlay (Australia)
-
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
programmed in R, based on alternative ordinary differential equations (ODE) for within-year population ... of the properties of these two models for estimation of M used simulation. In application to the data ... were obtained using proportions-at-length and fishery and year specific age length keys (ALKs) for ... the model was or was not conditioned on the total numbers caught in each year. Author(s): S. Candy, D ...
Meeting Document : WG-FSA-10/41 : Autor(es): S. Candy, D. Welsford, T. Lamb, J. Verdouw and J. Hutchins (Australia)