Search results
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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
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Interannual variation to the gonad cycle of the mackerel icefish
maturation cycle is also closely tracked to the time of year. The gonad maturation cycle of the mackerel ... sampling the commercial fishery. Spawning appears to occur at the same time each year, but the timing of ... gonadal development is subject to a considerable inter-annual variation. The implications of this ... . Kock (Germany) and J. Ellison (United Kingdom) Title: Interannual variation to the gonad cycle of the ...
Meeting Document : WG-EMM-00/45 : Author(s): I. Everson (United Kingdom), K.-H. Kock (Germany) and J. Ellison (United Kingdom)
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Preliminary insights of Antarctic toothfish sub-adults life-history traits from the southern Weddell Sea (Subarea 48.5)
Abstract: A few sub-adults of the Antarctic toothfish (Dissostichus mawsoni) were collected by ... -Larsen Ice Shelf. In this document we report first data on individual age, gonad stage of maturity and ... were immature, showing an age range of 10-13 years. Main prey consisted of Antarctic silverfish and ... daggertooth. Author(s): M. La Mesa, F. Donato and E. Riginella Title: Preliminary insights of Antarctic ...
Meeting Document : WG-FSA-18/06 : Author(s): M. La Mesa, F. Donato and E. Riginella
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Report on recent French catches of sea pens (Pennatulacea) in Lena Bank (CCAMLR sector 58.4.4b)
Abstract: Important catches of sea pens (Pennatulacea, NTW) in the 58.4.4b sector (Lena bank ... ) have been reported during the CCAMLR SAM Working Group 2018 (see WG-SAM-18/31 "Annual report of ... delegations). Detail of French catches, with abundances and weights are provided here (Tab.1). Data and ... includes the exhaustive collection of the organisms caught by the longlines (see WG-EMM-17/09). This report ...
Meeting Document : WG-FSA-18/23 : Author(s): A. Martin, J. Blettery and M. Eléaume