Resultados de la búsqueda
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Comparing two and three frequency dB window identification techniques for estimating Antarctic krill density
that only the 120-70 kHz (S v120-70) identification window was comparable with the regularly used 120 ... -38 kHz (S v120-38) window, and only the 200-120 kHz and 120-70 kHz (S v120-70 & S v200-120 ... ) identification window was comparable with the regularly used 120-38 and 200-120 kHz (S v120-38 & S v200-120 ... ) three-frequency window. Author(s): S. Fielding Title: Comparing two and three frequency dB window ...
Meeting Document : SG-ASAM-18/01 : Autor(es): S. Fielding
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Community structure of epipelagic macrozooplankton in the Ross Sea
located at 78°S, 175°E. Total of 13 taxa occurred at all stations and mean of 7.4 taxa were occurred in ... except at 0 ~ 50 m of 72°S, 175°E, where euphausiids only occurred. Copepods and chaetognaths dominated ... in the north of 72°S, while pteropods and euphausiids occurred besides them in the south of 72°S ... (in the north of 72°S along 175°E) and group 2 to 4 on the continental shelf. The latter three groups ...
Meeting Document : WG-EMM-07/34 Rev. 1 : Autor(es): Y. Watanabe, S. Sawamoto, T. Ishimaru and M. Naganobu (Japan)
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Classification of Southern Ocean krill and icefish echoes using Random Forests
echograms and analysis of differences in mean volume backscattering strengths (S V; dB re 1 m-1) measured at ... scattering fish species with an overall estimated accuracy of 95 %. Minimum S V, mean aggregation depth (m ... the random forest. Time-of-day and the difference between S V at 120 kHz (S V 120) and that at 38 kHz ... (S V 38) was also important. The random forest classification resulted in significantly higher ...
Meeting Document : WG-EMM-16/23 : Autor(es): N. Fallon, S. Fielding and P. Fernandes
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An examination of latitudinal variation in the growth rates of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea
(76° S) fell consistently below the von Bertalanffy curves calculated predominantly from data ... collected between 67 and 74° S, an investigation to test for latitudinal differences in growth rates was ... (62.5°–78.0° S). Between-zone comparisons were confounded by marked differences in the age structure of ... . mawsoni between 62.5° and 75° S. However, fish between the ages of 6 and 15 years in the southernmost zone ...
Meeting Document : WG-FSA-03/30 : Autor(es): P.L. Horn (New Zealand)
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Terra Nova Bay: hot spot in marine and terrestrial biodiversity, knowledge and functioning of the ecosystem
should be applied at a larger scale, by embracing more sites or enlarging the existing ones. Author(s ... ): S. Torcini, M. Vacchi, S. Aliani, G. Bavestrello, A. Bergamasco, G. Budillon, B. Calcinai, G ... . Catalano, R. Cattaneo-Vietti, C. Cerrano, M. Chiantore, S. Corsolini, R. Bargagli, A. Dell’Anno, G. di ... Prisco, G. Fusco, S. Focardi, L. Gugliemo, G. Lauriano, P. Luporini, O. Mangoni, S. Olmastroni, F. Pezzo ...
Meeting Document : WS-MPA-11/14 : Autor(es): S. Torcini, M. Vacchi, S. Aliani, G. Bavestrello, A. Bergamasco, G. Budillon, B. Calcinai, G. Catalano, R. Cattaneo-Vietti, C. Cerrano, M. Chiantore, S. Corsolini, R. Bargagli, A. Dell’Anno, G. di Prisco, G. Fusco, S. Focardi, L. Gugliemo, G. Lauriano, P. Luporini, O. Mangoni, S. Olmastroni, F. Pezzo, E. Pisano, L. Ghigliotti, P. Povero, S. Puce, A. Pusceddu, E. Rusciano, M. Saggiomo, V. Saggiomo, M.C. Gambi, S. Schiaparelli, G. Spezie, C. Verde, P. Del Negro (Italy)
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Community Structure of copepods in epipelagic layers in the Ross Sea and neighboring waters
the Ross Sea (175°E; north of 72°S, 170°W; north of 75°S) was characterized by high abundance (22.6 ... ; south of 72°S, 170°W; south of 75°S) were characterized with low abundances (2.6-5.2; mean 3.6 inds ... . 1000 m-3, 6.5-50.6; mean 18.5 inds. 1000 m-3). Author(s): Y. Watanabe, S. Sawamoto, T. Ishimaru and M ...
Meeting Document : WG-EMM-08/36 : Autor(es): Y. Watanabe, S. Sawamoto, T. Ishimaru and M. Naganobu (Japan)
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Chilean NPOA-Seabirds: first steps
Abstract: The progresses in the developing of the Chilean NPOA-S are described. At the moment, an ... measures, and the discussion of the Objectives and Goals of the NPOA-S. The final draft of the NPOA-S will ... be ready on December 2004. Author(s): C.A. Moreno and J. Arata (Chile) Title: Chilean NPOA-Seabirds ...
Meeting Document : WG-FSA-04/14 : Autor(es): C.A. Moreno and J. Arata (Chile)
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Biomass of Antarctic krill (Euphausia superba) off east Antarctica (30–80°E) in January–March 2006
relatively weak aggregations (s A <100 m 2 nmi-2 for each 2 km-alongtrack integration interval), with 50 ... the transects at 62°S. The majority of acoustic detections were in the top 100m of the water column ... , centred around 50 m depth. Author(s): T. Jarvis, E. van Wijk, N. Kelly, S. Kawaguchi and S. Nicol ...
Meeting Document : WG-EMM-06/16 : Autor(es): T. Jarvis, E. van Wijk, N. Kelly, S. Kawaguchi and S. Nicol (Australia)
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Analysis of krill trawling positions north of the South Shetland Islands (Antarctic Peninsula area), 1980/81–1999/2000
in the early 1980’s, along the shelf slope in the mid- to late 1980’s, and were highly variable, from ... the shelf across to the outer shelf in the early to late 1990’s. Intra-annual variation of trawling ... to have an effect. Author(s): S. Kawaguchi and K. Segawa Title: Analysis of krill trawling ...
Meeting Document : WG-EMM-01/35 : Autor(es): S. Kawaguchi and K. Segawa
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Latitudinal variation of demersal fish assemblages in the western Ross Sea
°S. The distribution and abundance of 65 species collected in these surveys were examined to ... broad assemblages were identified, in the southern Ross Sea (south of 74°S), central–northern Ross Sea ... (between latitudes 71°–74°S), and the seamounts further north (65°–68°S) where some species more typical of ... patterns in demersal fish communities. Author(s): M.R. Clark, M.R. Dunn, P.J. McMillan, M.H. Pinkerton, A ...
Meeting Document : WG-FSA-10/P03 : Autor(es): M.R. Clark, M.R. Dunn, P.J. McMillan, M.H. Pinkerton, A. Stewart and S.M. Hanchet