Resultados de la búsqueda
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POPULATION ASSESSMENTS OF GENTOO PENGUINS (PYGOSCELIS PAPUA) BREEDING AT AN IMPORTANT ANTARCTIC TOURIST SITE, GOUDIER ISLAND, PORT LOCKROY, PALMER ARCHIPELAGO, ANTARCTICA
Abstract: Goudier Island is located in the Palmer Archipelago, to the west of the Antarctic ... Peninsula; it is one of the most frequently visited tourist sites in Antarctica. A number of gentoo penguin ... (Pygoscelis papua) breeding colonies are located on the island and these have been the focus of one of the ... longest running experiments to examine the impacts of tourist numbers upon penguin breeding performance ...
Meeting Document : WG-EMM-09/P07 : Autor(es): P.N. Trathan, J. Forcada, R. Atkinson, R.H. Downie and J.R. Shears
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INFORMATION ON SPAWNING AND FECUNDITY OF ICEFISH CHIONOBATHYSCUS DEWITTI
Abstract: On the basis of the analysis of the biological material collected by one of the authors ... during fishery for Antarctic toothfish from 2002 till 2008 on different grounds of the Antarctic Zone ... spawning period of deep-water icefish Chionobathyscus dewitti during spring-and-summer period of the ... southern hemisphere. Higher numbers of individuals in prespawning and spawning state were noted on ...
Meeting Document : WG-FSA-09/13 : Autor(es): V. Prutko and D. Chmilevsky (Russia)
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TEMPORAL CLARIFICATION OF THE TRANSITION FROM BLUE PHASE FINGERLING TO EARLY JUVENILE BROWN PHASE IN NOTOTHENIA ROSSII FROM THE SOUTH SHETLAND ISLANDS
Abstract: Scales and whole otoliths were read for age determination of early stages of Notothenia ... rossii caught in Potter Cove, South Shetland Islands, in summer of years 2003-2006 and 2008. The sample ... was composed by blue phase fingerlings of 7-7.6 cm (TL) and age group 0 year and demersal young brown ... phase juveniles of 8.5-20.9 cm and predominant age groups 1-2 years. Counting of sclerites facilitated ...
Meeting Document : WG-FSA-09/32 : Autor(es): E. Barrera-Oro, E. Moreira, N. Alescio and E. Marschoff (Argentina)
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Comparison of equal-area cylindrical and circular piston transducers
Abstract: Design of sondes for in situ measurement of zooplankton or other scatterers requires ... choosing among alternative transducer geometries. This contribution addresses the problem of choosing ... between cylindrical and circular piston transducers by comparing the performance of the two according to ... dimensions of six fabricated cylindrical transducers, whose beam patterns have been measured by the ...
Meeting Document : WG-EMM-95/08 : Autor(es): Foote, K.G.
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CONVENORS’ REPORT OF THE WG-IMAF WORKSHOP
, Australia on 10th October 2008 to review the future of the ad hoc WG-IMAF. The workshop briefly reviewed the ... history of ad hoc WG-IMAF and considered the current work programme of CCAMLR with respect to the current ... and future role of ad hoc WG-IMAF. The workshop briefly considered future scenarios under which it ... should continue to focus on the direct impacts of fishing and marine debris on seabirds and marine ...
Meeting Document : WG-FSA-08/65 : Autor(es): K. Rivera and N. Smith (Co-conveners of ad hoc WG-IMAF)
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Indices of prey availability near the Seal Island CEMP site: 1990 through 1996
Abstract: Four indices of prey availability are calculated for prey surveys conducted in the ... vicinity of the Seal Island CEMP site during the austral summers of 1990-96. The indices are measures of ... AMLR surveys each year were sub-sampled to include the foraging range of predators breeding at Seal ... Island. The average depth of the prey field and its average distance from Seal Island were positively ...
Meeting Document : WG-EMM-96/22 : Autor(es): Hewitt, R.P., Demer, D.A., Watters, G.
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Gentoo penguin Pygoscelis papua diet as an indicator of planktonic availability in the Kerguelen Islands
Abstract: Since penguins rely on the main planktonic resources of the Southern Ocean, knowledge ... of their diet may be used for monitoring these resources. During winter and spring of 1987 and 1989 ... , we investigated the composition of the diet of gentoo penguins, Pygoscelis papua, in relation to ... changes in the availability of two prey species, Euphausia vallentini and Themisto gaudichaudii, sampled ...
Meeting Document : WG-Joint-94/11 : Autor(es): C.A. Bost, P. Koubbi, F. Genevois, L. Ruchon and V. Ridoux (France)
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Distribution of krill (Euphausia superba Dana) catches in the South Shetlands and South Orkneys
Abstract: Zones of 20 km width are defined around selected colonies of penguins distributed ... around the coasts of the South Shetland and South Orkney Islands. Krill catches in these zones are shown ... , probably as a result of more variable hydrographic conditions. About 50% of the catch in Subarea 48.1 from ... December to March was taken within 40 km of the coast, and 90% within 80 km in all years 1988-1990. In 1987 ...
Meeting Document : WG-KRILL-92/19 : Autor(es): D.J. Agnew (Secretariat)
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Selectivity of standard polish commercial trawl codends on Antarctic fishing grounds
= 100 mm, made of double twines with a thickness of 4.2 mm. The studies covered 6 major fish species. 1 ... during trawling, although the effectiveness of this process- especially in the latter case- is not ... tendency to pass through meshes of the codend than Antarctic icefish and bumphead notothenia. 3. The ... solution to the problem of ensuring selectivity of codends at a sufficiently good level seems possible as a ...
Meeting Document : SC-CAMLR-VII/BG/11 : Autor(es): J. Zaucha (Poland)
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Identification of Pleuragramma antarctica larvae in the Ross Sea via mitochondrial DNA
Abstract: Research into the early life stages of Pleuragramma antarctica is essential to ... understanding how oceanographic variation will impact spatial distributions over time. The recent findings of ... , length and growth data for larvae found in the western and eastern Ross Sea during the austral summer of ... genomic DNA from a sample of these larvae and, using fish universal primers, amplified part of the 16S ...
Meeting Document : WG-FSA-15/61 : Autor(es): J.A. Caccavo (Italy), C. Brooks (USA), L. Zane (Italy) and J.R. Ashford (USA)