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1. Selectivity and two biomass measures in an age-based assessment of Antarctic krill (Euphausia superba)

   Abstract:  An integrated, age-structured model was fitted to different combinations of survey data ... using two forms of selectivity (logistic or double-logistic) with time-constant or annually varying ... selectivity to investigate the population dynamics of Antarctic krill (Euphausia superba) near the Antarctic ... the South Shetland Islands from 1992 to 2011. Two indices of krill biomass based on (1) trawl-net ...

   Meeting Document : WG-EMM-15/P07 : Autor(es): D. Kinzey, G.M. Watters and C.S. Reiss

2. Performance metrics to index the spatial coverage of mark-recapture data

   Abstract:  Understanding the spatial distribution of the release of tagged fish and the subsequent ... spatial coverage of fishing effort to recapture tagged fish is an important consideration when ... measures of spatial overlap and potential bias in the development of tag-based biomass estimates are an ... statistics: (i) a single measure of the degree of spatial overlap between the release of tagged fish and ...

   Meeting Document : WG-SAM-16/13 : Autor(es): C. Marsh, A. Dunn and S. Mormede

3. Classification of Southern Ocean krill and icefish echoes using Random Forests

   Abstract:  Target identification remains a challenge for acoustic surveys of marine fauna ... . Antarctic krill, Euphausia superba, are typically identified through a combination of expert scrutiny of ... echograms and analysis of differences in mean volume backscattering strengths (S V; dB re 1 m-1) measured at ... icefish are currently surveyed using bottom-trawls, but the resultant estimates of abundance may be biased ...

   Meeting Document : WG-EMM-16/23 : Autor(es): N. Fallon, S. Fielding and P. Fernandes

4. Size and stage composition of age class 0 Antarctic krill (Euphausia superba) in the ice-water interface layer during winter/early spring

   Abstract:  The condition and survival of Antarctic krill (Euphausia superba) strongly depends on ... developmental stage. A comprehensive understanding of sea ice habitat use by krill, however, remains largely ... unknown. The aim of this study was to improve the understanding of the krill's interaction with the ... sea ice habitat during winter/early spring by conducting large-scale sampling of the ice-water ...

   Meeting Document : WG-EMM-16/P16 : Autor(es): F. Schaafsma, C. David, E. Pakhomov, B. Hunt, B. Lange, H. Flores, J.A. van Franeker

5. Otolith chemistry reveals local population structure of Antarctic toothfish (Dissostichus mawsoni) within the CCAMLR Subarea 48.6

   and economical value and that distributed in the high latitude of the Southern Ocean. The CCAMLR ... subarea 48.6 is one of an important fishing zone, however, the local population structure of D. mawsoni is ... unknown in this regions, which hampered the understanding on population dynamics of this species and the ... management of toothfish fishery. The chemistry in the otolith can often be used to distinguish population ...

   Meeting Document : WG-FSA-18/75 : Autor(es): L. Wei, G.P. Zhu, S. Somhlaba, X.Y. Yu and M. Duan

6. Advances are urgently needed in providing regular estimates of krill stock status based on the available data

   measure (the trigger level) which was established in 1991 and is “not related to the status of the krill ... trigger level is not related to the status of the stock. The establishing terms of reference for WG-EMM ... include requests to “assess the status of krill” and “develop management advice … for management of krill ... fisheries”. Although WG-EMM is now a quarter century old, it rarely assesses the status of the krill stock ...

   Meeting Document : WG-EMM-2019/28 : Autor(es): S. Hill, J. Hinke, N. Ratcliffe, P. Trathan and G. Watters

7. A LARGE-SCALE SURVEY OF ADÉLIE PENGUIN BREEDING DISTRIBUTION IN EAST ANTARCTICA

   populations. This paper describes a comprehensive, large-scale survey of the current breeding distribution of ... Abstract:  A recent gap analysis of knowledge of the breeding distribution of the Adélie penguin ... across the Australian Antarctic Territory in east Antarctica found that approximately half of the species ... ’ potential breeding habitat had no evidence of ever being searched. With such incomplete knowledge of the ...

   Meeting Document : WG-EMM-11/34 : Autor(es): C. Southwell and L. Emmerson (Australia)

8. Entanglement of Antarctic fur seals (Arctocephalus gazella) by man made debris at Bird Island, South Georgia, during the 2005 winter and 2005/06 breeding season

   Abstract:  Results of the survey of entanglements of Antarctic fur seals at Bird Island, South ... reported here. Two entanglements were observed in the winter, a decrease of 60% from the previous year, and ... the lowest number seen since records began in 1990. One of these involved a male pup entangled in ... individual involved. In contrast there was double the number of observed entanglements during summer of 2005 ...

   Meeting Document : SC-CAMLR-XXV/BG/13 : Autor(es): Delegation of the United Kingdom

9. Biomass of Antarctic krill (Euphausia superba) off east Antarctica (30–80°E) in January–March 2006

   Abstract:  A multidisciplinary, single-ship survey of CCAMLR Division 58.4.2 was conducted in ... January-March 2006, during which time multifrequency echosounder data were collected for the purposes of ... estimating the biomass (B 0) of Antarctic krill (Euphausia superba). The mean density of E. superba ... estimated to be 15.89 million tonnes with a CV of 47.93%. Most of the E. superba detected (80%) were in ...

   Meeting Document : WG-EMM-06/16 : Autor(es): T. Jarvis, E. van Wijk, N. Kelly, S. Kawaguchi and S. Nicol (Australia)

10. Distribution of albatrosses and petrels in the WCPFC Convention Area and overlap with WCPFC longline fishing effort

    Abstract:  This paper presents an analysis of the distribution of albatrosses and petrels in the ... area under the jurisdiction of the Western and Central Pacific Fisheries Commission (WCPFC), using data ... from the BirdLife Global Procellariiform Tracking Database. • The WCPFC area includes 41% of the global ... breeding distribution of albatrosses and petrels. • Albatross distribution is concentrated north of 20ºN ...

    Meeting Document : WG-FSA-06/19 : Autor(es): C. Small (BirdLife International)

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