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Southern Ocean Network of Acoustics (SONA): Report on Acoustic Processing and Methods Workshop, Vigo, 24–25 April 2016
partners and invited guests to discuss acoustic processing methods and future directions. Five agenda items ... In April 2016 Southern Ocean Network of Acoustics (SONA) hosted a workshop of its partners ...
Meeting Document : WG-EMM-16/36 : Author(s): S. Fielding, J. Thomas, C. Anderson, A. Conchon, A. Cossio, A. Dunford, P. Escobar-Flores, J. Horne, T. Jarvis, R. Kloser and T. Ryan
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Age and growth of the Antarctic skate (Amblyraja georgiana) in the Ross Sea
respectively) produced estimated ages at maturity of 6–7 years for males and 8–11 years for females. These ... estimates are near the middle to upper end of the range of ages at maturity for skates worldwide. Author(s ... Abstract: X-rays of vertebral half-centra, and X-rays and transmitted white light examination of ... caudal thorns, were used to estimate the ages of Amblyraja georgiana from the Ross Sea. Caudal thorns ...
Meeting Document : WG-FSA-04/29 : Author(s): M.P. Francis and C. Ó Maolagáin (New Zealand)
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Beach litter survey Signy Island, South Orkney Islands, 1993/94
clues regarding their origin noted. At Foca Cove, a total of 118 items were recovered with a combined ... weight of 18.35 kg. At Cummings Cove, a total of 170 items were recovered (6.21 kg) and at Starfish Cove ... trend has been reversed. For example, at Foca Cove, the total weight of debris recovered rose to 18.35 ... debris at Signy Island are unknown. There has been no increase in the number of research or tourist ...
Meeting Document : CCAMLR-XIII/BG/11 : Author(s): Delegation of United Kingdom
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Influence of tag numbers, size of tagged fish, duration of the tagging program, and auxiliary data on bias and precision of an integrated stock assessment
recaptures and maximise the likelihood of a robust assessment. (2) Using catch-at-age data instead of catch ... collection, this study investigated how the bias and precision of a CASAL assessment is influenced by various ... aspects of a tagging program, in particular the effects of the numbers of fish tagged, the duration of a ... tagging program, the size of tagged fish, and the type of auxiliary data used in the assessment. The ...
Meeting Document : WG-SAM-12/24 : Author(s): P.E. Ziegler (Australia)
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Population assessment of Patagonian toothfish in Subarea 48.4
addition of catch at age information for 2011, a minor change to the initial parameters of the selection ... pattern and the inclusion of additional information on size at age. CASAL estimates of stock size, harvest ... rate and recruitment are similar to those of last year’s assessment. B 0 is estimated at around 1,690 ... Abstract: This paper presents an update of the assessment of toothfish (Dissostichus spp.) in ...
Meeting Document : WG-FSA-12/36 : Author(s): R. Scott (United Kingdom)
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Impacts of rising sea temperature on krill increase risks for predators in the Scotia Sea
minimally realistic ecosystem model to examine how projected effects of ocean warming on the growth of ... Antarctic krill, Euphausia superba, might affect populations of krill and dependent predators (whales ... for predators by curtailing krill fishing at different points in the 21st century. The projected ... effects of ocean warming on krill biomass were strongest in the northern Scotia Sea, with a ≥ 40% decline ...
Meeting Document : WG-EMM-18/P02 : Author(s): E.S. Klein, S.L. Hill, J.T. Hinke, T. Phillips and G.M. Watters
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Do the males of Dissostichus eleginoides grow faster, or only mature before females?
maturity at age and not due to the growth rate. Based on this sample of 434 females and 398 males, it is ... Helena and Cisne Verde during August of 1997-and utilized by the WG-FSA-97 to build the maturity ogives ... concluded that the males mature for the first time at 4 years age and females at 10 years age, reaching 100 ... % maturity at 12 years age the males and 21 years age the females. Author(s): C.A. Moreno (Chile) Title: Do ...
Meeting Document : WG-FSA-98/16 Rev. 1 : Author(s): C.A. Moreno (Chile)
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A comparison of densities and length distribution of the Champsocephalus gunnari stock in Subarea 48.3 between years 1994 and 1995
depth strata in the South Georgia Islands shelf, while density remained stable at Shag Rocks. The fit of ... Abstract: Mean densities and length structure of Champsocephalus gunnari obttained in the 1994 ... determined by a search procedure yielding randomly selected clusters of stations located within the 50–150 ... design. Forty five stations in the first cruise and 48 in the second were analyzed. Of these, 51 pairs of ...
Meeting Document : WG-FSA-95/34 : Author(s): Marschoff, E., Calcagno, J., Gonzalez, B.
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Results of E.L. Holmberg 1995 fish survey in Subarea 48.3
comparison between both cruises. Of these, 20 hauls were located at less than 0.5 miles and 11 between 0.5 ... density of several species, particularly Champsocephalus gunnari at the shelf of the South Georgia Islands ... of the younger fraction (below 4 years: 99.3% at the South Georgia Islands and 93.4 % at Shag Rocks ... Abstract: The survey comprised 48 bottom trawl hauls taken in subarea 48.3. About 80% of the ...
Meeting Document : WG-FSA-95/35 : Author(s): Marschoff, E., Madirolas, A., Balestrini, C., Tossonotto, G., Gonzalez, B., Calcagno, J.
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Estimation of the incidental capture of seabird species in commercial fisheries in New Zealand waters, 2002/03
operations (95% dead). The trawl-caught seabirds were from at least eight target fisheries, four of which had ... Abstract: Ministry of Fisheries observers reported 595 seabird captures from observed fishing ... ) trawl fisheries accounted for 87% of observed trawl-caught seabirds. Incident rates (expressed as the ... percent of observed fishing operations with seabird captures) for longline fisheries in 2002–03 were ...
Meeting Document : WG-FSA-04/57 : Author(s): S.J. Baird (New Zealand)