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1. A tale of two islands: contrasting fortunes for sub-Antarctic skuas at the Prince Edward Islands

   Abstract:  Subantarctic skuas Catharacta antarctica are key predators of burrowing petrels at sub ... -Antarctic islands, and can be used to monitor the health of burrowing petrel populations. A survey of skuas ... December 2001. Prince Edward Island (46 km 2) remains free of introduced mammals, whereas Marion Island ... (290 km 2) had a feral population of cats from the 1950s to 1980s, and still supports a large ...

   Meeting Document : WG-EMM-10/P03 : Autor(es): P.G. Ryan, P.A. Whittington and R.J.M. Crawford

2. Evaluating the impact of multi-year research catch limits on overfished toothfish populations

   Abstract:  In stocks that have been depleted by overfishing, the benefits of additional fisheries ... delaying the recovery of such stocks. Through simulating a Dissostichus eleginoides stock that has been ... subjected to varying levels of overfishing and research catches, this study show that stocks can take ... decades to recover even in the absence of fishing, and apparently low levels of research catches can ...

   Meeting Document : WG-FSA-10/42 Rev. 1 : Autor(es): D.C. Welsford (Australia)

3. A von Bertalanffy growth model for Division 58.5.2 fitted to length-at-age data and a comparison of predicted with observed growth from mark–recapture data

   variable probability (VP) sampling of fish that were aged. Sub-sampling of random length frequency (LF ... ) data used to obtain the samples of fish for ageing used length-bin sampling involving a fixed sample ... size per bin. Estimation of the VB parameters used a definition of the maximum likelihood which took ... into account VP sampling due to length-dependent selectivity of trawl fishing and also accounted for ...

   Meeting Document : WG-FSA-SAM-06/07 : Autor(es): S.G. Candy, A.J. Constable, T. Lamb and R. Williams (Australia)

4. Development of an algorithm designed to assess observer data quality and performance

   Abstract:  As part of the Secretariat task to ensure the quality and consistency of the data ... observers in their logbooks. A first version of the algorithm was tested on four randomly selected longline ... , as well as value inconsistencies through a limited set of logical tests. For each logbook inspected ... , a text report indicating the locations of faulty entries, a set of figures to display length and ...

   Meeting Document : WG-SAM-13/40 : Autor(es): Secretariat

5. Collection, processing and potential use of sonar data from krill fishing vessels

   Abstract:  Omnidirectional sonars (herein sonars) are capable of providing an alternative view of ... Antarctic krill distribution, and potentially abundance. Data from sonars can be used independently of ... acoustic surveys. Sonars are capable of sampling large volumes of water and can image entire krill swarms ... vessels.  The purpose of this paper is to stimulate discussion on the utility of sonars to describe krill ...

   Meeting Document : SG-ASAM-14/01 : Autor(es): G. Skaret (Norway) and M.J. Cox (Australia)

6. Preliminary examination of otolith microchemistry to determine stock structure in Antarctic toothfish (Dissostichus mawsoni) between SSRU 88.1C and 88.2H

   Abstract:  Life history characteristics of Antarctic toothfish (Dissostichus mawsoni), were ... concentrations in the otolith edge and then to (ii) assess the potential of natal signatures to distinguish ... shown. This resulted in the correct classification of 63% of fish overall to their original capture ... sites. Discrimination of otolith natal signatures using Al:Ca and Zn:Ca showed greater classification ...

   Meeting Document : WG-SAM-14/33 : Autor(es): R. Tana, B.J. Hicks, C. Pilditch and S.M. Hanchet (New Zealand)

7. Fishing behaviour of Chinese krill fishing fleet

   Abstract:  Understanding the fishing behavior of a kind of fishery is a very important part of ... relationship between distance and frequency distribution of the adjacent krill fishing positions were analyzed ... in the subareas of the Commission for Conservation of Antarctic Marine Living Resources (CCAMLR ... subareas 48.1, 48.2 and 48.3). The frequency of distances between consecutive hauls shows a heavy-tailed ...

   Meeting Document : WG-EMM-17/45 : Autor(es): R. Wang and G.P. Zhu

8. Development of a vessel safety checklist and debriefing protocol for use in SISO

   Abstract:  In accordance with the recommendations of the 2013 Panel Review of the CCAMLR Scheme of ... of SISO recommends the performance of a vessel safety check (see proposed Annex II in CCAMLR-XXXVI/25 ... ) prior to observer deployment, as well as the use of a form and protocol for debriefing observers to be ... approved by the Commission (proposed A(e bis) in CCAMLR-XXXVI/25).  This paper provides examples of vessel ...

   Meeting Document : CCAMLR-XXXVI/BG/16 : Autor(es): Delegation of the USA

9. Engaging ‘the crowd’ in citizen science and remote sensing to learn about habitat affinity of two Southern Ocean seals

   presence/absence patterns of the Weddell seal (Leptonychotes weddellii), and has recently been adapted for ... efficient method to screen large numbers of images (and hence area) for undertaking census counts of Weddell ... images of the pack ice acquired during October 2018 in the Weddell Sea to identify presence/absence of ... 852 VHR images, composed of a series of tiles called “maps”, across both campaigns. The circum ...

   Meeting Document : WG-EMM-2019/37 : Autor(es): M.A. LaRue, D.G. Ainley, J. Pennycook, K. Stamatiou, M. Dozier, J. Saints, L. Sales, N. Nur, S. Stammerjohn and L. Barrington

10. Effects of recruitment variability and natural mortality on Generalised Yield Model projections and the CCAMLR Decision Rules for Antarctic krill

    ;vector of recruitments" input option to simulate the population dynamics of krill in the Antarctic ... Peninsula region (Subarea 48.1) under various assumptions. The annual proportions of krill less than 36 mm ... in length to the total captured in AMLR net samples in four sampling regions of the Antarctic ... between 14 and 45%) and "high mortality" (M = 3, annual survival of 5%). CVs of either 0, 10 ...

    Meeting Document : WG-EMM-12/26 : Autor(es): D. Kinzey, G. Watters and C. Reiss (USA)

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