Search results
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Spatio–temporal dynamics in maturation and spawning of Patagonian toothfish Dissostichus eleginoides on the subantarctic Kerguelen Plateau
Abstract: This study investigated maturation and spawning of Patagonian toothfish Dissostichus ... Sector of the Southern Ocean based on gonads and otoliths collected between years 2004–2015, and using ... histological analyses and calibration of macroscopic staging criteria. Dissostichus eleginoides at HIMI spawn ... throughout the late autumn and winter months of May–August, and spawning activity is concentrated on slopes ...
Meeting Document : WG-FSA-17/P04 : Author(s): P. Yates, P. Ziegler, D. Welsford, J. McIvor, B. Farmer and E.Woodcock
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Overview of global trade in toothfish (Dissostichus spp.)
GLOBEFISH unit, an analysis was conducted for the five-year period of 2012–2016 on the global trends of the ... . Captures the global trade of toothfish. The analysis showed that over this five-year period quantity of ... imports globally have seen an increase of 16.08% and exports have seen an increase in 15.54%. The average ... global unit value price of toothfish products has also shown an increase with imports increasing by 19.68 ...
Meeting Document : CCAMLR-XXXVI/BG/05 Rev. 1 : Author(s): CCAMLR Secretariat
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Change in environmental conditions of the Southern Ocean observed by satellites and data-assimilating models between 1981 and 2019
Abstract: We provide a summary of environmental change in the Southern Ocean over the period of ... concentration from merged observation of SeaWiFS and MODIS-Aqua (1987–2019); (2) sea-surface temperature (SST ... ) from the AVHRR series of NOAA satellites (1981–2019); (3) spatial gradient of SST (as an indicator of ... model (VGPM); (6) estimates of mixed layer depth from the data-assimilating US Navy hindcast model HyCOM ...
Meeting Document : WG-EMM-2019/39 : Author(s): M. Pinkerton
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INVESTIGATING LENGTH AT MATURITY OF ANTARCTIC TOOTHFISH (DISSOSTICHUS MAWSONI) BASED ON SCIENTIFIC OBSERVERS’ DATA
Abstract: Through generalised linear models, the gonadosomatic index of Antarctic toothfish in ... the Ross Sea region was shown to vary with latitude, length and month. Limitations of the scientific ... observers’ staging data were highlighted and GSI is recommended as a better indicator of maturity status in ... Antarctic toothfish. Reports of histological analyses of a small number of Antarctic toothfish showed ...
Meeting Document : WG-FSA-08/48 : Author(s): S. Mormede, S. Parker and P. Grimes (New Zealand)
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Contribution to the early life history of Channichthyidae from the Bransfield Strait and South Georgia
Abstract: Age and early growth of 5 species of Channichthyidae / Champsocephalus gunnari ... during FIBEX /February-April 1981/ and SIBEX /December-January 1983/84/. Additional material- larvae of ... to March 1980 /Fig. 1/. Length frequency distributions of the above-named species were usually ... patterns of microincrements, discernible in these otoliths under a light microscope, in most cases are ...
Meeting Document : CCAMLR/86/FA/08 : Author(s): W. Ślósarczyk (Poland)
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Investigating the uncertainty of age determinations for Patagonian toothfish (Dissostichus eleginoides) and the implications for stock assessment
Abstract: We revised the method of Candy et al. (2012) to estimate the ageing error matrix ... (misclassification matrix) to address some issues regarding true ages not being the mode at the extremes of the ... matrix and a lack of smoothness in the probabilities for ages above 25 years. Positive errors now ... greater than the plus group are incorporated into the final row of the misclassification matrix. We ...
Meeting Document : WG-FSA-14/46 : Author(s): P. Burch, P. Ziegler, W. de la Mare and D. Welsford (Australia)
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Biomass of Antarctic krill around South Shetland using 2-dB difference method in April 2016
operated by Norway, Korea, and Japan, etc. Major fishing area is the surroundings of South Sheltland where ... . CCAMLR (Convention for the Conservation of Antarctic Marine Living Resources) is currently implementing a ... utilize Krill resources continuously. This study is aimed to estimate the density and the biomass of Krill ... that inhabit in the surroundings of South Sheltland by using acoustics. An acoustic survey was ...
Meeting Document : WG-EMM-16/60 : Author(s): Delegation of the Republic of Korea
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The diet of Antarctic fur seals Arctocephalus gazella during the breeding season at Heard Island
Heard Island fed mainly on fish with an average 95.2% of scats in monthly collections containing fish ... remains. Pelagic myctophids constituted more than 50% of fish taken by fur seals at the beginning of the ... summer season and again at the end when there was an influx of non-breeding male seals. During the middle ... period from October to December, fish from the surrounding shelf area comprised the bulk of the diet ...
Meeting Document : SC-CAMLR-VIII/BG/53 : Author(s): Delegation of Australia
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A proposal to review and strengthen the CCAMLR System of Inspection
Abstract: The CCAMLR System of Inspection was adopted in 1988 at a time when few such schemes ... existed and well before the challenges of large scale IUU fishing for toothfish. Since then, the ... Commission has progressively adopted a wide range of stronger and innovative conservation measures to combat ... of efforts to eliminate IUU fishing, Australia proposes that the Commission review its System of ...
Meeting Document : CCAMLR-XXVI/29 Rev. 1 : Author(s): Delegation of Australia
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Is our attempt to estimate biomass of Antarctic fish from a multi-species survey appropriate for all targeted species? Notothenia rossii in the Atlantic Ocean sector – revisited
Abstract: Notothenia rossii was the first target species of the fishery in the Southern Ocean ... . The species has been heavily fished at the beginning of the 1970’s. The closure of the fishery for ... this species was one of the first conservation measures CCAMLR adopted in 1985. Fish biomass within a ... CCAMLR Subarea or part of a subarea is commonly estimated targeting a number of species including N ...
Meeting Document : WG-FSA-03/12 : Author(s): K.-H. Kock (Germany), M. Belchier (United Kingdom) and C.D. Jones (USA)