Search results
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Status of krill target strength
, acoustic frequencies and orientation parameters. File: 07-Foote-et-al.pdf ... phenomenon in fish-scattering measurements (Weimer and Ehrenberg, 1975; Foote et al., 1986). Its recognition ... and the number density p of scatterers (Stanton et al., 1987), 0" - Sv = p- = pO" 4n bs' (8) where the usual ... mm and mean mass of 0.6 g. Nakayama et al., (1986) measured E. superba in situ in the Indian ... by 13 dB to -81.7 dB. Shimadzu et al., (1989) measured E. superba in situ in the Scotia Sea north ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 101–126 : Author(s): Foote, K.G., D. Chu and T.K. Stanton
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Distribution, morphology and ecology of Macrourus whitsoni and M. caml (Gadiformes, Macrouridae) in the Ross Sea region
of Antarctic toothfish. File: Pinkerton et al.pdf ... of 10 tonnes reported in 1998 which increased to 480 tonnes in 2005 (Hanchet et al., 2008a ... ). Grenadiers are also a major prey species of Antarctic toothfish in the region (Fenaughty et al., 2003 ... ; Stevens et al., 2012). Eco- system modelling of the Ross Sea region suggests that toothfish are the main ... -induced trophic cascades (Pinkerton et al., 2010). Grenadier caught as by-catch and found in stom- achs ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 37–61 : Author(s): Pinkerton, M.H., P. McMillan, J. Forman, P. Marriott, P. Horn, S. Bury and J. Brown
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Comparison of two methods to assess fish losses due to depredation by killer whales and sperm whales on demersal longlines
, fishery economics and/or conservation of odontocetes. File: Gasco et al.pdf ... . Gasco et al. 2 Introduction Depredation is a human–wildlife interaction over resources, which often ... in terrestrial cases (e.g. O’Connell-Rodwell et al., 2000; Breck and Meier, 2004), they are consider- ably ... and Mejuto, 2008). In the context of declining world fisheries (Pauly et al., 2005), depredation ... of depredated fish is part of the total catch and is often disregarded when defining quotas (Roche et al ...
Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 1–14 : Author(s): Gasco, N., P. Tixier, G. Duhamel and C. Guinet
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Fitting Euphausia superba into Southern Ocean food-web models: a review of data sources and their limitations
Seefischerei Palmaille 9 22767 Hamburg, Germany Atkinson et al. 220 Introduction Few species of pelagic ... ). This is because (i) they have an important role in the food web of parts of the Southern Ocean (Croxall et al ... ., 1999; Hopkins et al., 1993a, 1993b; Stowasser et al., 2012); (ii) the species is a potentially ... valuable resource (Nicol et al., 2011); and (iii) the species is associated with sea-ice for its early ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 219–245 : Author(s): A. Atkinson, S. Nicol, S. Kawaguchi, E. Pakhomov, L. Quetin, R. Ross, S. Hill, C. Reiss, V. Siegel, G. Tarling (submitted to the 2008 Joint CCAMLR-IWC Workshop)
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Is current management of the Antarctic krill fishery in the Atlantic sector of the Southern Ocean precautionary?
the monitored biomass relates to biomass at the subarea and regional scales. File: Hill et al.pdf ... considered appropriate to maintain the krill stock and support krill predators. Hill et al. 32 ... needs a practical definition of ‘precautionary’. Hewitt et al. (2002) explain Subarea catch limits ... that exploitation rates are below 9.3%, then the catch limits are precautionary by the logic of Hewitt et al ... biomass falling to 20% of the reference level at any time should be no more than 10%. Constable et al ...
Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 31–51 : Author(s): Hill, S.L., A. Atkinson, C. Darby, S. Fielding, B.A. Krafft, O.R. Godø, G. Skaret, P.N. Trathan and J.L. Watkins
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Additional data on anti-Brucella antibodies in Arctocephalus gazella from Cape Shirreff, Livingston Island, Antarctica
Blank et al. @tre present sur des mammif6res marins d u monde entier. Nous soulignons l'importance ... mammals from the Northern Hemisphere have been recorded along the coasts of Scotland (Ross et al., 1994 ... ; Ross et al., 1996), Arctic Canada (Nielsen et al., 1996b), England (Foster et al., 1996; Jepson et al ... (Tryland et al., 1999). It has also been reported in captive marine mammals in the USA (Ewalt et al ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 147–154 : Author(s): Blank, O., P. Retamal, P. Abalos and D. Torres
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Zooplankton: Trophic modelling of the Ross Sea
et al. 1991; Brinton et al. 2000; Azzali & Kalinowski, 2000; Sala et al. 2002; Azzali et al. 2006 ... ), and in the eastern parts (Ackley et al. 2003). Distribution information (Azzali et al. 2006; Ackley et al. 2003 ... at least until August) growth slows (Kirkwood 1996; Nicol et al. 2004), presumably because consumption ... to spawning of E. crystallorophias compared with E. superba (Makarov et al. 1991). E. crystallorophias take ...
Document : Site Section: Publications
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Bacteria and detritus: Trophic modelling of the Ross Sea
on bacteria (Moodley et al. 2002; Josefson et al. 2002). There is evidence, though, that copepods ... (Kemp 1990; Fabiano et al. 2000b). Here, we assume that a nominal 25% of detrivorous consumption ... of papers by Ducklow (Ducklow 1999; Ducklow et al. 2000, 2001; Monticelli et al. 2003). Concentrations ... Ducklow et al. (2001) give an effective depth of bacteria (the ratio of water column integrated average ...
Document : Site Section: Publications
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Sea Ice Biota: Trophic modelling of the Ross Sea
and mammals (Ackley et al. 2003), while at the same time, the ice itself, especially the lower part which ... were copepods and their nauplii (Hoshiai et al. 1987a). Also sea ice appears to attract mesopelagic ... organisms (such as fish) at night thus exposing them to foraging by surface foraging birds (Kaufmann et al ... (Giesenhagen et al. 1999). Primary and bacterial production in the water column can be enhanced up to 28 ...
Document : Site Section: Publications
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A post-processing method to remove interference noise from acoustic data collected from Antarctic krill fishing vessels
of fishing-vessel-based acoustic data for a range of objectives. File: Wang et al.pdf ... of objectives. Wang et al. 18 Introduction Acoustic sampling has long been used as an important tool ... ) in the Southern Ocean (Greene et al., 1991). To date, only two large-scale multiship sci- entific acoustic ... surveys, the FIBEX (Trathan et al., 1995) and the CCAMLR-2000 krill synoptic sur- vey of Area 48 (Watkins ... et al., 2004), have been undertaken across the main distribution centres of krill. The estimated ...
Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 17–30 : Author(s): Wang, X., J. Zhang and X. Zhao