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1. Calculating effective releases and recaptures for stock assessments based on tag detection and tagging mortality indices

   . This method allows the use in the stock assessment of tag data from all vessels, via direct application ... developed using a methodology which controls for the spatial and temporal variability of fishing operations ... occurred in the same time and place (i.e. within a specific distance and in the same fishing season). The ... method showed that when the confounding effects of variable fishing location and time were controlled ...

   Meeting Document : WG-SAM-14/30 : Author(s): S. Mormede (New Zealand)

2. IDENTIFICATION OF DATA QUALITY METRICS FOR TAGGING DATA SELECTION

   . These include metrics for taxonomic resolution in the observer data, goodness of fit of catch data to ... Benford's Law, and the variation in toothfish catch rates.This reduced set of data quality metrics ... could be helpful in the identification of trips which have similar data quality to the known “good data ... ” trips, but where, due to heterogeneity in the stock and in the spatial and temporal distribution of ...

   Meeting Document : WG-SAM-09/19 : Author(s): D.A.J. Middleton and A. Dunn (New Zealand)

3. Linking predator and prey behaviour: contrasts between Antarctic fur seals and macaroni penguins at South Georgia

   -based (animal tracking and diet analysis) techniques, we examined variability in the foraging ecology of ... occurred in 80% of fur seal diet samples, with fish remains in 37% of samples. Penguin diets contained the ... highest proportion of fish in over 20 years of routine monitoring (46% by mass; particularly the myctophid ... foraged close to the Shag Rocks shelf-break, probably exploiting the high daytime biomass of fish in this ...

   Meeting Document : WG-EMM-10/P07 : Author(s): C.M. Waluda, M.A. Collins, A.D. Black, I.J. Staniland and P.N. Trathan

4. Impact of predation by Cape fur seals Arctocephalus pusillus on Cape gannets Morus capensis at Malgas Island, Western Cape, South Africa

   000 in 2005/06. This amounted to about 29%, 83% and 57% of the overall production of fledglings at the ... sustainable. There was a 25% reduction in the size of the colony, the second largest of only six extant Cape ... increase in the seal population and altered management of the islands. At Malgas Island, most gannet ... (Morus capensis) fledglings around Malgas Island in the 2000/01 breeding season, 11 000 in 2003/04 and 10 ...

   Meeting Document : WG-EMM-06/9 : Author(s): A.B. Makhado, R.J.M. Crawford and L.G. Underhill (South Africa)

5. CDS Implementation and Data Analysis

   the CDS. CDS reports of catches outside the Convention Area have increased in 2018. The Secretariat ... contacted 16 NCPs to seek their engagement in the CDS in 2019. Analyses of the trends and supply chains in ... imports was by the United States of America (USA) in both years, followed by China. Analysis of supply ... Abstract:  The CDS was effectively implemented in 2019 by 16 Member States, three Acceding States ...

   Meeting Document : CCAMLR-38/BG/10 Rev. 2 : Author(s): CCAMLR Secretariat

6. Beach debris survey Signy Island, South Orkney Islands, 2002/03

   1994/95 (an increase of 38% and 7% since 2001/02 respectively). There was an increase in the number of ... /94. Such a continued increase in the number of these packaging bands found indicates that the ban on ... longevity of plastics and other materials with a high resistance to degradation in the marine environment ... and size categories. A total of 54 items weighing 27.36kg were collected. The number of items found ...

   Meeting Document : SC-CAMLR-XXII/BG/12 : Author(s): Delegation of the United Kingdom

7. Linking acoustic scattering coefficient to krill fishery data: feasibility of estimating krill abundance using fishing survey

   higher than average catch of night trawls. The average thickness of krill swarm in the daytime was ... Abstract:  Antarctic krill (Euphausia superba Dana) is a key species in the Southern Ocean ... fisheries. In this paper, using the multi-frequency acoustic data and the fishery data, the relationship ... between the acoustic scattering coefficient of krill swarms and catch, catch per unit effort (CPUE), catch ...

   Meeting Document : WG-EMM-17/44 : Author(s): T. Wang, G.P. Zhu, J.F. Tong and L.X. Xu

8. Gear loss reported by longline fishing vessels for the 2018 and 2019 fishing seasons

   . Vessels reported 1 632 km of line lost in the Convention Area, of which 27% were complete lines. There was ... no difference in the relative reporting of lost hooks by gear type, with rates of loss recorded at ... 0.3% for each gear type for the past two seasons. There was a significant difference in the frequency ... for Spanish or autoline. It is important to improve reporting in order to accurately quantify rates of ...

   Meeting Document : WG-FSA-2019/18 : Author(s): CCAMLR Secretariat

9. New Zealand Antarctic research programme

   reconnaissance and photography are used in the Ross Sea sector of Antarctica to determine where Adelie penguins ... world population. Some rookeries are photographed in all, or most, of the seasons to study the pattern ... repeating the photographic surveys of rookeries on Ross Island using helicopters in December and January to ... Abstract:  Since parameters of penguin populations may provide good indices of the abundance of ...

   Meeting Document : WG-CEMP-92/24 : Author(s): P.R. Wilson (New Zealand)

10. Mackerel icefish size and age at South Georgia and Shag Rocks

    and 2002. Most surveys were between December and February (summer), with one in September (Spring). Mean ... between localities. To compensate for variation in the time of surveys, the mean TL of age-classes were ... mean TL of age-classes 1, 2 and 3 were, respectively, 14.5, 23.8 and 30.2 cm at South Georgia, and 18.6 ... , 26.8 and 33.6 cm at Shag Rocks. The mean TL of each age-class of C. gunnari at Shag Rocks ...

    Meeting Document : WG-EMM-03/7 : Author(s): A.W. North (United Kingdom)

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