Search results
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Southern Ocean Network of Acoustics (SONA): Report on Acoustic Processing and Methods Workshop, Vigo, 24–25 April 2016
Abstract: In April 2016 Southern Ocean Network of Acoustics (SONA) hosted a workshop of its ... ; Metrics of data quality and DOIs; Summary statistics and a way forward for regional comparison; and ... Current and future collaboration and opportunities. This report is a summary of those agenda items. Author ... . Horne, T. Jarvis, R. Kloser and T. Ryan Title: Southern Ocean Network of Acoustics (SONA): Report on ...
Meeting Document : WG-EMM-16/36 : Author(s): S. Fielding, J. Thomas, C. Anderson, A. Conchon, A. Cossio, A. Dunford, P. Escobar-Flores, J. Horne, T. Jarvis, R. Kloser and T. Ryan
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Research program on resource potential and life cycle of Dissostichus species from the Subarea 88.2 A in 2016-2019
implementation of the previous research program took place in 2010-2012 fishing seasons and investigate resource ... potential and life cycle of Dissostichus species within the eastern part of the Ross Sea over shelf and ... together. Author(s): Delegation of the Russian Federation Title: Research program on resource potential ... and life cycle of Dissostichus species from the Subarea 88.2 A in 2016-2019 Microsoft Word File: fsa ...
Meeting Document : WG-FSA-16/16 Rev. 1 : Author(s): Delegation of the Russian Federation
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Recruitment of Antarctic krill (Euphausia superba) and possible causes for its variability
Abstract: Between year variability of krill year class success and recruitment during the 1977 ... abundance of the 1 + age class, varies substantially between years, whereas it is quite similar between ... conditions during the preceding winter season, the timing of krill spawning, and the occurrence of dense salp ... concept is developed describing the interactions of various parameters leading to good or poor krill ...
Meeting Document : WG-EMM-95/15 : Author(s): Siegel, V., Loeb, V.
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Variation in the diet of the blue-eyed shag Phalacrocorax atriceps throughout the breeding season at Half-Moon Island, South Shetland Islands
Abstract: One hundred and seventy three regurgitated casts of the blue-eyed shag or imperial ... important in mass (79%), followed by N. nudifrons and T. newnesi. The overall composition of the diet was ... diet was more diverse and comprised chiefly prey of lower energetic content like other smaller fish ... species and non- fish organisms. This may reflect different degrees of energy demand by chicks at ...
Meeting Document : WG-EMM-95/78 : Author(s): Barrera-Oro, E., Casaux, R.
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Relative selectivity of four sampling methods using traps and trawls for male snow crabs (Chionoecetes opilio)
Abstract: Catch rate and catch composition of male snow crabs were compared for four sampling ... deployed during the day. and (4) bottom trawl deployed at night. Catches were characterized in terms of ... crab body sizes, shell conditions, and claw allometry. We concluded that: 1) mean and modal size of ... , were larger than those caught in the trawl; the size of crabs caught in the trawl at night was larger ...
Meeting Document : WS-CRAB-93/11 : Author(s): J.M. Hoenig and E.G. Dawe (USA)
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Trophic study of Ross Sea Antarctic toothfish (Dissostichus mawsoni) using carbon and nitrogen stable isotopes
Abstract: This report amalgamates stable isotope analyses of fish (n=476), squid (n=50) and ... variables in explaining the variation of δ15N and δ13C. Positive relationships between length and δ15N ... indicate that, very generally, larger fish consume prey of a higher trophic level than smaller fish. There ... range of 7 ‰ (9–16 ‰) in δ15N, which is equivalent to two trophic steps. All fish, except Antimora ...
Meeting Document : WG-EMM-08/27 : Author(s): S.J. Bury, M.H. Pinkerton, D.R. Thompson, S. Hanchet, J. Brown and I. Vorster (New Zealand)
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Supervised and unsupervised (RapidKrill) estimates of krill density from DY098
, using python, processing of acoustic data collected during the UK cruise DY098. The same ... up with a similar estimate of krill NASC and krill density as the supervised method. An ... estimate of krill density is supplied for the WCB survey using three methods. The multifrequency method ... produces a krill density of 8.60 gm-2, compared with 21.76 gm-2 (supervised) or 20.41 gm-2 (unsupervised ...
Meeting Document : SG-ASAM-2019/09 : Author(s): A. Ariza, S. Fielding and R. Blackwell
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Information on the spawning season and gonadosomatic indices of Dissostichus mawsoni from Subarea 88.1 in the 2001/02 season
Abstract: Data on maturity, gonadosomatic index (GSI) and length/weight of Antarctic toothfish ... longline vessels Janas and San Aotea II operating in the Exploratory Fishery. The onset of the spawning ... season was identified as late autumn (May). A significant difference in the condition of fish between ... summer and autumn was noted, and this may be a result of migration f or spawning. The maximum GSI ...
Meeting Document : WG-FSA-02/31 : Author(s): G.J. Patchell (New Zealand)
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Status of the FIBEX acoustic data from the west Atlantic
to check the consistency of krill abundance estimates derived from different survey vessels. There is ... a good level of consistency between the results from four of the vessels, Itzumi, Dr Eduardo L ... Holmberg, Odysee and Walther Herwig. While there is an error factor due to the combination of data ... : Status of the FIBEX acoustic data from the west Atlantic Approval: Approved ...
Meeting Document : WG-KRILL-93/31 : Author(s): P.N. Trathan and I. Everson (United Kingdom)
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CEMP data summary and updated analysis of CEMP data from Subarea 48.
krill-based ecosystems, providing a basis for regulating harvesting of Antarctic living marine resources ... been submitted for 2016/17, including an area-based comparison of the 2016/17 observations with the ... previous season A summary of available CEMP data and metadata and any issues encountered with data ... submitted to the Secretariat. An update on the spatial analysis of CEMP data in subarea 48.1 using Combined ...
Meeting Document : WG-EMM-17/17 : Author(s): CCAMLR Secretariat