Résultats de la recherche
-
Results of a research survey to monitor abundance of pre-recruit Antarctic toothfish in the southern Ross Sea, February 2012
longline surveys to monitor pre-recruit (<100 cm TL) toothfish in the south of SSRUs 881.J and 881.L in ... the southern Ross Sea using standardised gear in a standardised manner; and (ii) To carry out ... experimental depth-stratified fishing in 400–600 m depth adjacent to the survey boundaries to establish the ... carry out a longline survey of pre-recruit toothfish from commercial fishing vessel in Ross Sea using ...
Meeting Document : WG-SAM-12/29 : Auteur(s): S.M. Hanchet, S. Mormede, A. Dunn (New Zealand) and H.-S. Jo (Republic of Korea)
-
Trophic interactions and population trends of killer whales (Orcinus orca) in the southern Ross Sea
Abstract: Foraging events and related trends in numbers of Type-B and-C killer whales (Orcinus ... Sea killer whales (Type-C; RSKWs), a fishing-eating ecotype, has continued to decrease in a pattern ... coincident with a decrease in the number and size of an important prey: Antarctic toothfish (Dissostichus ... -eating killer whales and large Chinook salmon (Oncorhynchus tshawytscha) in the northeast Pacific. In ...
Meeting Document : WG-FSA-12/P03 : Auteur(s): D.G. Ainley and G. Ballard
-
A preliminary stock assessment in SSRUS 486A, G: A Bayesian and CPUE based biomass dynamic model
contribution to estimate abundance in a simple biomass dynamic model for both species of toothfish in northern ... sets in which both species are present, and thus, an analysis of catch intention was implemented by ... analysed in terms number of tagged and recovered individuals, and tag size-overlap. Catch reported and ... dynamic model in Bayesian framework using standardised CPUE and catches (considering assumed IUU) was ...
Meeting Document : WG-SAM-13/29 : Auteur(s): R. Wiff, J.C. Quiroz (Chile) and R. Scott (United Kingdom)
-
Decadal trends in the South Georgia demersal fish assemblage
research hauls conducted in depths < 350m during 19 research random stratified trawl surveys carried out ... appeared to be linked to habitat type. Low diversity in species was seen consistently over the Shag Rocks ... shelf. There was no detectable change in species composition across the region over three decades. Eight ... species from two families, the Notoheniidae and the Channichthyidae dominated the survey biomass in all ...
Meeting Document : WG-FSA-13/26 : Auteur(s): M. Belchier (United Kingdom)
-
Analysis of krill fishery operations in Subarea 48.1: spatial-time distribution of CPUE and fishing efforts
Abstract: In previous years we revealed that period 2006-2011 is characterized by the highest ... values of standardized CPUE indices in the Subarea 48.1 for the last 25 years. We continue to investigate ... methods. Our investigation shows how fishery operated by years and month in each SSMUs with special ... attention to differences between national fleets. It was shown also significant variability in fishing ...
Meeting Document : WG-EMM-14/21 : Auteur(s): S. Kasatkina and P. Gasyukov (Russia)
-
Growth and shrinkage in Antarctic krill Euphausia superba is sex-dependent
period is critical to their success. Laboratory evidence suggests that krill may shrink in body length ... during this time in response to the low availability of food. Nevertheless, verification that krill can ... shrink in the natural environment is lacking because winter data are difficult to obtain. One of the few ... adult krill (>35 mm total body length) obtained from commercial vessels in the Scotia-Weddell region ...
Meeting Document : WG-EMM-16/P04 : Auteur(s): G. Tarling, S. Hill, H. Peat, S. Fielding, C. Reiss and A. Atkinson
-
Feeding habits and prey consumption of Antarctic minke whale Balaenoptera bonaerensis in the Indo–Pacific region of the Southern Ocean
species in the Southern Ocean. Quantitative information on prey consumption of whales is useful to ... understand their feeding ecology and role in the Antarctic marine ecosystem. The purposes of this study were ... in stomach contents, and 2) to estimate the amount of prey consumed by whales, accounting for some ... under Special Permit in the Antarctic: 1989/90-2004/05) and JARPAII (2005/06-2013/14) in the Indo ...
Meeting Document : WG-EMM-17/14 : Auteur(s): T. Tamura
-
Summary of the toothfish fishery and tagging program in the Ross Sea region (Subarea 88.1 and SSRUs 882A–B) through 2017/18
Abstract: This report summarises the toothfish fishery in the Ross Sea region (Subarea 88.1 and ... Protected Area, most of fishing effort was carried out in the historically fished areas. There was a small ... amount of effort in the northern area of SSRU 88.2A, which was opened to the exploratory fishery with the ... the SRZ and the area inside the General Protection Zone of the Ross Sea region MPA was taken in the ...
Meeting Document : WG-FSA-18/46 : Auteur(s): S. Mormede and S. Parker
-
Report on fish by-catch during exploratory fishing activities in Division 58.4.3a (Elan Bank) between 2008 and 2018
(Dissostichus eleginoides) last submitted in 2018 by Japan and France in Division 58.4.3a (WG-FSA-18/61). We ... analyzed bycatch composition in number and biomass during the period 2008-2018 to investigate the inter ... -annual variations in bycatch patterns, spatial distribution and biological parameters of the main bycatch ... strong effects of gear and bathymetry on bycatch composition and biomass. As shown in others regions ...
Meeting Document : WG-FSA-2019/56 : Auteur(s): C. Péron, C. Chazeau, N. Gasco and F. Massiot-Granier
-
Changes in the diet of the South Georgia shag Phalacrocorax georgianus at the South Orkney Islands along four consecutive years
molluscs (mainly octopods and bivalves) and polychaetes. Harpagifer antarcticus (in 1995 and 1998) and ... prey in all of the seasons and predominated in mass in 1995 and 1996, followed by Notothenia coriiceps ... and L. nudifrons. In 1997 G. gibberifrons and N. coriiceps were the species that most contributed to ... the diet whereas N. coriiceps and H. antarcticus did in 1998. Our results differ from those reported ...
Meeting Document : WG-EMM-00/8 : Auteur(s): R. Casaux and A. Ramón (Argentina)