Результаты поиска

1. Descriptive analysis of mesopelagic backscatter from acoustic data collected in the Ross Sea

   Abstract:  This report presents results from a pilot study to investigate the use of acoustics to ... data were collected from the research vessel Tangaroa during a voyage to the western Ross Sea in ... much more backscatter in the upper 1000 m and a wider variety of mark types north of 67° S. Common mark ... types in the northern region included a surface layer at less than 50 m depth, schools and layers ...

   Meeting Document : WG-EMM-06/11 : Автор(ы): R.L. O’Driscoll (New Zealand)

2. Growth models for D. eleginoides for the Heard Island plateau region (Division 58.5.2) calibrated from otolith-based length at age data and validated using mark-recapture data

   trawl in Division 58.5.2 were fitted using von Bertalanffy (VB) and segmented-linear models using a ... (VP) of sampling lengths. A segmented linear trawl fishing selectivity function was used where the ... obvious asymptotic behaviour so we compare the fit of the VB model to a segmented linear model. We also ... adjust the VB model by incorporating a multiplicative term that reduces the VB length-age trajectory ...

   Meeting Document : WG-FSA-05/64 Rev. 1 : Автор(ы): S.G. Candy, T. Lamb, A.J. Constable and R. Williams (Australia)

3. Performance assessment of underwater setting chutes, side setting and blue-dyed bait to minimize seabird mortality in hawaii longline tuna and swordfish fisheries – Final Report August 2003

   Abstract:  Mortality in longline fisheries is a critical global threat to some seabird species ... and effectively, will help resolve this global problem. Cooperative research and a commercial ... , commercial viability, and practicality in the Hawaii pelagic longline fisheries. A seabird avoidance method ... capture rates of treatments tested. Because side setting promises to provide a large operational benefit ...

   Meeting Document : WG-FSA-03/36 : Автор(ы): E. Gilman (USA), N. Brothers (Australia), D. Kobayashi, S. Martin, J. Cook, J. Ray, G. Ching and B. Woods (USA)

4. Estimating food consumption of marine predators: Antarctic fur seals and macaroni penguins

   examples to test the algorithm. A sensitivity analysis showed that estimates of prey consumed were most ... offspring production. Uncertainty in the measurement of metabolic rate led to a positive bias in the mean ... consumed. 3. Assuming a diet mainly of krill Euphausia superba, annual food consumption by Antarctic fur ... ?11] and 8?08 (CV = 0•23) million tonnes, respectively. This was equivalent to a total annual carbon ...

   Meeting Document : WG-EMM-02/23 : Автор(ы): I.L. Boyd (United Kingdom)

5. INTERACTIONS OF PATAGONIAN TOOTHFISH FISHERIES WITH KILLER AND SPERM WHALES IN CROZET EXCLUSIVE ECONOMIC ZONE: AN ASSESSMENT OF DEPREDATION LEVELS AND INSIGHTS ON POSSIBLE MITIGATION SOLUTIONS

   study (i) provides estimations of annual depredation levels on a 5-years period (2003-2008), (ii ... year period we estimated a total loss of 1200 tons of Patagonian toothfish due to depredation which ... represents a financial loss of approximately 10 millions €. Killer whales were found to be responsible for ... the largest part of this loss (70%) while sperm whales had a lower impact (30%). Photo-identification ...

   Meeting Document : WG-IMAF-09/12 : Автор(ы): P. Tixier, N. Gasco, G. Duhamel and C. Guinet (France)

6. PRELIMINARY REPORT OF THE NEW ZEALAND RV TANGAROA IPY-CAML SURVEY OF THE ROSS SEA REGION, ANTARCTICA IN FEBRUARY-MARCH 2008

   Abstract:  During February and March 2008 New Zealand carried out a major research voyage into the ... trawls, seabed cameras, sleds, and corers were deployed in each habitat to obtain samples for a broad ... 30 years, a total of 282 gear deployments were made at 39 sites covering a wide range of habitats ... were brought back for identification and further study. A total of 55 hours of seabed video and 12,500 ...

   Meeting Document : WG-EMM-08/18 : Автор(ы): S.M. Hanchet, J. Mitchell, D. Bowden, M. Clark, J. Hall, R. O’Driscoll, M. Pinkerton and D. Robertson (New Zealand)

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

   , 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 (> ... Plankton Recorder (SO-CPR) Survey. We demonstrate that it is possible to obtain a relationship between both ... estimate abundances of O. similis through the Southern Ocean. We present a number of methods for ...

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

8. Spatial and seasonal distribution of adult Oithona similis in the Southern Ocean: predictions using boosted regression trees

   Abstract:  We applied a multivariate statistical modelling technique called boosted regression ... conditions in a broadly similar way throughout the Southern Ocean. Compared to a compilation of nethaul data ... adult stages combined. The models show higher occurrence and elevated abundances in a broad circumpolar ... Scotia Sea, two areas off east Antarctica, in the frontal zone north of the Amundsen Sea, and a small ...

   Meeting Document : WG-EMM-10/P14 : Автор(ы): M.H. Pinkerton, A.N.H. Smith, B. Raymond, G.W. Hosie, B. Sharp, J.R. Leathwick and J.M. Bradford-Grieve

9. Adélie penguins as indicators of the state of the sea-ice in Adélie Land

   the population there, a second complete breeding failure took place in the season 2016-17, leading to ... precipitations occurred only over 2-3 days in mid-November 2016 and several nests were buried under more than a ... meter of snow, but the snow falls were immediately followed by almost a week with temperatures ... glacier in front of Pétrel Island. This is a serious threat to the populations of Pétrel Island and a ...

   Meeting Document : WG-EMM-17/01 Rev. 1 : Автор(ы): Y. Ropert-Coudert, A. Kato and C. Barbraud

10. Entanglement of Antarctic fur seals Arctocephalus gazella in man-made debris at Signy Island, South Orkney Islands, 2005/2006

    Island, South Orkney Islands are reported for the 2005/2006 summer season. There was 1 sighting of a seal ... wearing a neck collar of man-made debris. Data are compared with results from a parallel study undertaken ... number recorded at Bird island between the austral summers of 1988/89 and 2003/04. Although such a ...

    Meeting Document : SC-CAMLR-XXV/BG/15 : Автор(ы): Delegation of the United Kingdom

Страницы