Search results
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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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Review of the CEMP standard methods and their delivery to the CEMP database
-EMM to continue review of the CEMP Standard Methods and their delivery to the CEMP database. The ... discussions were diverse in covering a wide range of parameters, methods and issues, but in the limited time ... available it was not possible to discuss all aspects of CEMP. The issues considered are presented under ... broad themes with some historical background to the development of those themes provided as context ...
Meeting Document : WG-EMM-04/70 : Author(s): C. Southwell, J. Clarke (Australia), K. Reid (United Kingdom), G. Watters (USA) and D. Ramm (CCAMLR Secretariat)
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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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Bycatch of skates (Rajiformes) and grenadiers (Macrouridae) in longline fisheries in Subarea 48.3
Abstract: This paper investigates factors affecting the bycatch of skates (Rajiformes) and ... to the sea bed and type of bait used. The areas of greatest catch rates differed by area and depth ... range. During the period 1996–1999 skate bycatch was higher in February-March, while that of grenadiers ... . Ellis and R. Scott (United Kingdom) Title: Bycatch of skates (Rajiformes) and grenadiers (Macrouridae ...
Meeting Document : WG-FSA-14/47 Rev. 1 : Author(s): V. Laptikhovsky, M. Soeffker, M. Belchier, J. Roberts, C. Darby, J. Ellis and R. Scott (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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Quantifying uncertainty in the Chapman mark-recapture estimate of abundance
estimate biomass in the initial stage of developing an assessment. This short paper describes the use of ... the R package tagr to obtain Petersen / Chapman estimates of abundance. The package implements a non ... WG-FSA encourage Members to provide estimates of uncertainty associated with indicative biomass ... . Welsford (Australia) Title: Quantifying uncertainty in the Chapman mark-recapture estimate of abundance ...
Meeting Document : WG-FSA-15/49 : Author(s): P. Burch (Australia), S. Parker (New Zealand) and D. Welsford (Australia)
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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