Résultats de la recherche
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Preliminary assessment of Champsocephalus gunnari on the Heard Island Plateau (Division 58.5.2) based on a survey in May 2002
current estimates of length at age parameters would be for most of the fish to be three year olds. However ... 58.5.2 in the vicinity of Heard Island in May 2002 to provide the information for an assessment of yield ... , given the abundance of fish in the population and the age structure of fish last year, it would be more ... year old fish then the yield for 2002/03 is estimated to be 1990 tonnes. If it comprises mostly four ...
Meeting Document : WG-FSA-02/47 : Auteur(s): A.J. Constable, R. Williams and T. Lamb (Australia)
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Detection of growth zones in the eyestalk of the Antarctic krill Euphausia superba (Dana, 1852) (Euphausiacea)
growth zones can be definitely established as an indicator of age. The detection of growth zones in the ... Abstract: No reliable measures of age currently exist in the Antarctic krill, Euphausia superba ... for identifying growth zones. The krill was collected at the South Orkney Islands during January and ... February 2015, and varied between 30 and 53 mm in total body length. Up to six growth zones were identified ...
Meeting Document : WG-EMM-16/P02 : Auteur(s): B.A. Krafft, M. Kvalsund, G. Søvik, E. Farestveit and A.-L. Agnalt
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Increase in relative abundance of fjord Notothenia rossii in Potter Cover, South Shetland Islands, after the decrease associated with commercial fishing in the area
non commercially fished Notothenia coriiceps, which was already reported for the period 1983-1990 in a ... previous study, is still evident. An increasing trend of N. rossii catches was observed, but the actual ... 80´s. These results are supported by our knowledge on the diet of the piscivorous Antarctic shag ... explanation for the decrease in recruitment to the inshore sub-populations of N. rossii and G. gibberifrons in ...
Meeting Document : WG-FSA-99/30 : Auteur(s): E.R. Barrera-Oro, E.R. Marschoff and R.J. Casaux (Argentina)
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Scientific background document in support of the development of a CCAMLR MPA in the Weddell Sea (Antarctica) – Version 2017 – Reflection of the recommendations by WG-EMM-16 and SC-CAMLR-XXXV
separate cost layers for krill and toothfish) will be reported to the CCAMLR Working Groups in 2018. Author ... further work, in particular regarding the issues and questions raised at WG-EMM-16 and SC-CAMLR-XXXV. Here ... , including an update on the Antarctic toothfish habitat model. Chapter 3 provides a sensitivity analysis of ... the level of protection for Antarctic toothfish and other demersal fish that explores a range of ...
Meeting Document : SC-CAMLR-XXXVI/BG/28 : Auteur(s): Delegation of Germany
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SCAR-MARINE BIODIVERSITY INFORMATION NETWORK 2010 AND BEYOND
Change on its ecosystems, Antarctic marine biodiversity information has to be widely published ... , which aggregates the information on the web portal (90 datasets; 1,000,000 records). SCAR-MarBIN is ... (financial or in-kind), on an equitable basis, to sustain and further the services SCAR-MarBIN presently ...
Meeting Document : CCAMLR-XXVII/BG/35 : Auteur(s): Delegation of Belgium
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Fisheries risks to the population viability of black petrel (Procellaria parkinsoni)
population. The mean age of first breeding for black petrel is estimated to be 6.7 y. Before this, new adults ... area. Once birds start breeding, their annual survival rate is 0.89, 80% breed each year, and of those ... 1.2% and 3.1% per year. Mark-recapture data were useful in estimating demographic parameters, like ... spend an average of 1.2 y in the colony as pre-breeders, with only 3% skipping the pre-breeder phase. Of ...
Meeting Document : WG-SAM-10/P01 : Auteur(s): R.I.C.C. Francis and E.A. Bell (New Zealand)
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The biology of the spiny icefish (Chaenodraco wilsoni Regan, 1914)
Antarctic Peninsula in the last 25- 30 years has been the spiny icefish Chaenodraco wilsoni Regan 1914. C ... attempts suggested a maximum age of about 8 – 10 years. Author(s): K.-H. Kock, L.V. Pshenichnov, C.D ... myctophids to some extent in other areas. Age determination still awaits validation. Preliminary ageing ...
Meeting Document : WG-FSA-07/P1 : Auteur(s): K.-H. Kock, L.V. Pshenichnov, C.D. Jones, J. Gröger and R. Riehl. (Polar Biol., 31 (3): 381–393 (2007))
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Distribution of foraging by female Antarctic fur seals
around the island of South Georgia were an important indicator for the localisation of foraging. This ... Abstract: The study examined the distribution of critical habitat for foraging by female ... forage mainly within 100 km of the location at which the offspring was being raised. When this constraint ... develop a function that described the foraging distribution for the whole breeding population of females ...
Meeting Document : WG-EMM-03/38 : Auteur(s): I.L. Boyd, I.J. Staniland and A.R. Martin (United Kingdom)
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Effects of different harvesting strategies on the stock of Antarctic icefish Champsocephalus gunnari around South Georgia
Champsocephalus gunnari have been simulated for a period of 30 years. These were- diffierent levels of constant ... of the incoming year class. An increaseof F, however, should not occur before 4 years after a good ... years after a good recruitment,- pulse fishing at an interval of 3 years with no fishing in between;- a ... fishing mortality (F0.1, Fmax, 2xFmax),- harvesting contantly at 50%F0.1 with an increase of F 3 or 6 ...
Meeting Document : SC-CAMLR-VIII/BG/47 : Auteur(s): Delegation of Federal Republic of Germany
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Preliminary insights of Antarctic toothfish sub-adults life-history traits from the southern Weddell Sea (Subarea 48.5)
were immature, showing an age range of 10-13 years. Main prey consisted of Antarctic silverfish and ... -Larsen Ice Shelf. In this document we report first data on individual age, gonad stage of maturity and ... Consent: No Delegation responsibility for releasing documents: Italy ...
Meeting Document : WG-FSA-18/06 : Auteur(s): M. La Mesa, F. Donato and E. Riginella