Résultats de la recherche

1. An alternative method for estimating the level of illegal fishing using simulated scaling methods on detected effort

   Abstract:  A new method for estimating illegal fishing effort is put forward. The results from ... this new method are similar to those of the Agnew and Kirkwood (2005) method, and this suggests that ... the current method is adequate under circumstances of low evasion and when good knowledge exists that ... zero observations reflect zero illegal fishing. The new method performs better in the case of zero ...

   Meeting Document : WG-FSA-05/P7 : Auteur(s): Ball, I.

2. EXTRAPOLATING CONTINUOUS PLANKTON RECORDER DATA THROUGH THE SOUTHERN OCEAN USING BOOSTED REGRESSION TREES

   and scale-dependent relationship between species abundance and available environmental data. The ... , called BRT (Boosted Regression Trees), to data on the distribution of Oithona similis, a small cyclopoid ... copepod which is abundant through much of near-surface waters of the Southern Ocean. A large dataset (> ... ;19 000 records) of abundances of O. similis were measured during the SCAR Southern Ocean Continuous ...

   Meeting Document : WG-SAM-08/12 : Auteur(s): M.H. Pinkerton, A.N.H. Smith (New Zealand), B. Raymond, G. Hosie (Australia) and B. Sharp (New Zealand)

3. Revised research plan for the Spanish exploratory longline fishery for Dissostichus spp. in Divisions 58.4.1 and 58.4.2: Fundamentals and procedures (this is a revision of WG-SAM-12/13)

   Abstract:  A revision of the research plan for the Spanish exploratory longline fishery for ... Dissostichus spp in Divisions 58.4.1 and 58.4.2, submitted to the XXXI-WG-SAM, taking into account the ... suggestions made by the Working Group is presented. Two methods to estimate the local biomass of the toothfish ... are proposed, a depletion experiment together with the tag of some specimens using the DeLury model ...

   Meeting Document : WG-FSA-12/69 : Auteur(s): R. Sarralde, L.J López Abellán and S. Barreiro (Spain)

4. 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 ... satellite observaton (1981 to present). The environmental data we consider are: (1) chlorophyll-a ... ) from the AVHRR series of NOAA satellites (1981–2019); (3) spatial gradient of SST (as an indicator of ... ocean fronts) from the same AVHRR observations; (4) sea ice concentration from microwave satellite ...

   Meeting Document : WG-EMM-2019/39 : Auteur(s): M. Pinkerton

5. Revised input parameters and implications for the Antarctic toothfish (Dissostichus mawsoni) stock assessment in Subareas 88.1 and 88.2

   Abstract:  In this paper, we address a number of aspects of the model inputs and parameters of the ... Antarctic toothfish stock assessment for the Ross Sea fishery. In particular we review catch history, length ... runs that investigate the sensitivity of the 2006 stock assessment to changes in these model inputs and ... parameters. Tree-regression methods were used to investigate the areal structure of the length distribution ...

   Meeting Document : WG-SAM-07/6 : Auteur(s): A. Dunn and S.M. Hanchet (New Zealand)

6. Distribution of temperature, salinity, density and flow across the Drake Passage in December 1994

   across the Drake Passage. The seventh Antarctic Ocean Survey cruise by the R/V Kaiyo Maru of the Japanese ... Fisheries Agency was conducted in the waters around the Antarctic Peninsula in 199/95 austral summer season ... . In the survey, oceanographic observations were carried out along the north-south line from 56-21 S ... , 66-37W to 61-49S, 58-28W across the Drake Passage from 1 to 9 December 1994. The Polar Front ...

   Meeting Document : WG-EMM-01/30 : Auteur(s): M. Naganobu and K. Kutsuwada (Japan)

7. LENGTH AND AGE AT SPAWNING OF ANTARCTIC TOOTHFISH DISSOSTICHUS MAWSONI IN THE ROSS SEA

   male Antarctic toothfish Dissostichus mawsoni from fish sampled in the Ross Sea spanning the 2000-2009 ... fishing seasons. The female spawning ogive incorporates the proportion of sexually mature fish that do not ... management decision rules. A characterisation of the oocyte developmental cycle of Antarctic toothfish shows ... that primary endogenous growth can occur for an extended period with oocytes accumulating at the ...

   Meeting Document : WG-FSA-09/37 : Auteur(s): S.J. Parker and P.J. Grimes (New Zealand)

8. DISTRIBUTION AND ABUNDANCE OF SKATES ON THE KERGUELEN PLATEAU (CCAMLR DIVISIONS 58.5.1 AND 58.5.2)

   Abstract:  Three species of skates are commonly taken as incidental by-catch in the Patagonian ... toothfish longline and trawl fisheries, and the mackerel icefish trawl fishery on the Kerguelen Plateau ... , Bathyraja eatonii, B. irrasa and B. murrayi. The three skates are widely distributed across the Kerguelen ... Plateau, showing different spatial distributions, linked mainly with depth. In the Australian EEZ, B ...

   Meeting Document : WG-FSA-09/43 : Auteur(s): G.B. Nowara, D.C. Welsford, T. Lamb (Australia), N. Gasco, P. Pruvost and G. Duhamel (France)

9. A CHARACTERISATION OF THE TOOTHFISH FISHERY IN SUBAREAS 88.1 AND 88.2 FROM 1997–98 TO 2007–08

   Abstract:  The exploratory fishery for Antarctic toothfish (D. mawsoni) has been operating for ... eleven years in Subarea 88.1 and for six years in Subarea 88.2. This report summarises the large amount ... of data collected on toothfish and the associated bycatch by all vessels participating in the fishery ... . All SSRUs in the two subareas except for 88.1D and 88.2C have now been fished. The 2008 D. mawsoni ...

   Meeting Document : WG-FSA-08/22 : Auteur(s): M.L. Stevenson, S.M. Hanchet and A. Dunn (New Zealand)

10. Hydrographic conditions in the Elephant Island plateau region during December 1996

    Abstract:  Based on historic data as provided by the World Ocean Atlas 1994, the general climatic ... background for temperature, salinity and silicate is given for the area between the Fa1kland (Malvinas ... ) Islands and the Antarctic Peninsula Region. A data set sampled during December 1996 in the Elephant Island ... Plateau Region by RV POLARSTERN, is compared to the climatic background data, and to more recent data as ...

    Meeting Document : WG-EMM-97/06 : Auteur(s): Stein, M.

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