Search results

1. Ideal survey patterns: an example of using a simulated world

   Abstract:  This paper considers a class of survey patterns for a toothfish long lining fishery ... . These survey patterns are characterised by a minimum mutual separation distance and a shot selection ... selected or that locations are selected at random. The landscape and fishery are simulated in a spatially ... interest about the fished population? If and when can the catch/effort data be used as a measure of the ...

   Meeting Document : WG-FSA-01/75 : Author(s): I.R. Ball and A.J. Constable (Australia)

2. Preliminary aspects of a simulation model to be used for evaluating the experimental crab fishery

   Antarctic crab fishery. A simulation model is proposed for conducting this work. Length frequency and catch ... fishery simulation is spatially explicit, and the dynamics of crab abundance are described on a daily ... basis. The simulation includes advective and diffusive movement rates, a lagged Beverton-Holt stock ... recruitment relationship, and a model for catch that contains a random normal deviate. Finally, an algorithm ...

   Meeting Document : WG-FSA-94/26 : Author(s): G. Watters (USA)

3. A characterisation of the toothfish fishery in Subareas 88.1 and 88.2 from 1997–98 to 2012–13

   with no trend. A standardised CPUE analysis in the Ross Sea fishery showed an increase to 2008 followed ... by a slight decline to 2013. Standardised CPUE indices in Subarea 88.2 showed a general decline from ... 2003 to 2013 in SSRU 882H, but a general increase from 2006 to 2013 in SSRUs 88.2C–G. However, these ... indices were very uncertain due primarily to the lack of a consistent set of vessels over time and may not ...

   Meeting Document : WG-FSA-13/48 : Author(s): S. Hanchet, S. Mormede and A. Dunn (New Zealand)

4. A characterisation of the toothfish fishery in Subareas 88.1 and 88.2 from 1997/98 to 2009/10

   881H and 881I, with a reduced catch from 881K due to ice conditions. The catch limit in the north was ... 88.2E, but a slight decline in SSRU 882CDFG over the last two years. We carried out a more detailed ... characterisation of Patagonian toothfish catches for the first time. A total of 124 t of Patagonian toothfish has ... species identification be independently checked through examination of a subsample of otoliths from these ...

   Meeting Document : WG-FSA-10/23 : Author(s): S.M. Hanchet, M.L. Stevenson and A. Dunn (New Zealand)

5. A procedure for krill density estimation

   Abstract:  This paper is intended to provide a generalised example of a procedure for krill ... density estimation, based on a worked example from the Balleny Islands (WG-EMM-15/17).  Explicitly, this ... paper is not the CCAMLR krill density estimation procedure, but has been written as a discussion ... document for the 2016 SG-ASAM meeting. Author(s):  M.J. Cox, S. Fielding and A. Constable Title:  A ...

   Meeting Document : SG-ASAM-16/01 : Author(s): M.J. Cox, S. Fielding and A. Constable

6. Report on an Antarctic cetacean survey on board a Chilean fishing vessel in February 2016

   Abstract:  During a CCAMLR endorsed fishing survey on board the Chilean trawler ‘Cabo de Hornos ... ’ around the South Orkney Islands and Elephant Island, a trained marine mammal observer conducted a ... . A total of 44 fin whale (Balaenoptera physalus) groups comprising 61 individuals were recorded on ... effort, and a total of 28 humpback whale (Megaptera novaeangliae) groups comprising 47 individuals. A ...

   Meeting Document : WG-FSA-16/19 : Author(s): S. Viquerat, H. Herr, K.-H. Kock and P. Arana

7. DEVELOPMENT OF A SPATIALLY EXPLICIT AGE-STRUCTURED STATISTICAL CATCH-AT-AGE POPULATION DYNAMICS MODEL FOR MODELLING MOVEMENT OF ANTARCTIC TOOTHFISH IN THE ROSS SEA

   Abstract:  We present a generalised spatially explicit Bayesian statistical catch-at-age ... a preliminary development version of this model to Antarctic toothfish in the Ross Sea as an age and ... numbers of areas, and is implemented as a discrete time-step state-space model that represents a cohort ... -based population age structure in a spatially explicit manner. The model is parameterised by both ...

   Meeting Document : WG-SAM-08/14 : Author(s): A. Dunn and S. Rasmussen (New Zealand)

8. A multivariate approach to examining patterns in research fishing activities using the SSRU 88.2A–B North survey as an example

   Abstract:  The WG-SAM in 2016 “agreed the importance of identifying a set of diagnostics and clear ... criteria to assess the likelihood that a vessel is operating as would be expected in normal research ... activities”, further noting that a characterisation of fishing activities was also required in order to ... achieve such a goal (WG-SAM 2016, paragraph 4.19). In this paper, we further develop the analysis of Large ...

   Meeting Document : WG-FSA-16/46 : Author(s): S. Mormede, A. Dunn, S.J. Parker, T. Earl, C. Darby, M. Söffker and O.R. Godø

9. Development of a spatially-explicit minimum realistic model for Antarctic toothfish (Dissostichus mawsoni) and its main prey (Macrouridae and Channichthyidae) in the Ross Sea

   Antarctic toothfish and its main prey, grenadiers (Macrouridae) and icefish (Channichthyidae), we develop a ... spatially explicit model using a predator-prey suitability model for the Ross Sea Region. We model the age ... fishing mortality on both prey species and that icefish is expected to show a larger increase in biomass ... through time than grenadiers. It also suggests that a prey-suitability function is more likely than a ...

   Meeting Document : WG-EMM-14/51 : Author(s): S. Mormede, M. Pinkerton, A. Dunn, S. Hanchet and S. Parker (New Zealand)

10. Adélie penguin diet: a pilot study directly comparing data from stomach flushing with faecal DNA analysis

    composition and mass. Analysing prey DNA in faeces may be a useful, less invasive, approach to complement ... existing diet monitoring. We undertook a pilot study to directly compare these two methods using Adélie ... /January) in 2014/15 and 2015/16. Each method produced a similar pattern of penguin diet, with a shift from ... almost exclusively krill in 2014/15 to a mixture of fish and krill in 2015/16. Stomach flushing allows ...

    Meeting Document : WG-EMM-18/29 : Author(s): B. Deagle, J. McInnes, L. Emmerson, M. Dunn, S. Adlard and C. Waluda

Pages