Search results
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An overview of Southern Ocean zooplankton data: abundance, biomass, feeding and functional relationships (submitted to the 2008 Joint CCAMLR-IWC Workshop)
for differences in the extent of identification of early larval stages. Likewise, the time of year, depth ... <30% of primary production. This emphasises the dominant role of microbial food chains involving ... , the time of year, depth of sampling and mesh size of sampler greatly influence the recorded abundance ... in the SO, since mesozooplankton typically remove <30% of primary production. This emphasises ... 600 P er ce nt ag e re te nt io n 100 80 60 40 20 0 68 Figure 2a. Data taken from ... appears flexible, being one at Kergue- len (Labat et al., 2002) and one to two (Watts and Tarling, 2012 ... active, efficient species, with corresponding energy budget terms perhaps one-third to one-half ... is available. Their aver- age daily C rations are ~6–7%, similar to those of krill (Pakhomov and Perissinotto ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 171–218 : Author(s): A. Atkinson, P. Ward, B.P.V. Hunt, E.A. Pakhomov and G.W. Hosie
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Fatty acid and stable isotope analyses to infer diet of Antarctic toothfish caught in the southern Ross Sea
of these two techniques can delineate the main prey items of Antarctic toothfish and trophic structure ... of these two techniques can delineate the main prey items of Antarctic toothfish and trophic structure ... and T. loenbergii, supporting the idea that this is one of their main prey species in the southern Ross Sea ... that T. loennbergii is one of the main prey species of Antarctic toothfish, as it is one of the deepest nototheniid ... age. Geochim. Cosmochim. Acta, 48 (5): 1135–1140. Near, T.J., S.E. Russo, C.D. Jones and A.L ... . 80 60 40 20 0 % c om po si tio ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 21–36 : Author(s): Jo, H.-S., I. Yeon, C. Lim, S.M. Hanchet, D.-W. Lee and C.-K. Kang
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Factors to consider in developing management measures for krill
qepTaX onHCbIBaIOTC~ MepbI no ycosepmeHcTBoBaHHIO npo~e~yp ynpaBReHH~ npOMbICROM KpHR~. naeTc~ on ... more than one per species, existing in a common spatial arrangement, but with limited genetic exchange ... of this management regime. 181 One implication of this approach is that in open areas, heavy fishing upon krill ... of the system (de la Mare, 1986a). 4.4 Indicator Species One possibility for detecting deleterious effects ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 175–187 : Author(s): de la Mare, W.K.
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Improving estimates of Adélie penguin breeding population size: developing factors to adjust one-off population counts for availability bias
to adjust one-off population counts for availability bias Abstract / Description: New methods are presented ... , throughout the breeding season and standardisation of the time series to a reference point one week after ... by adjusting a one-off count using availability adjustment factors will not account for penguins that left ... the breeding site prior to the reference point because their breeding attempt failed, breeding-age penguins ... adjustment data from several sites and/or years would be applied to any one-off count datum ... ImprovIng estImates of adélIe penguIn breedIng populatIon sIze: developIng factors to adjust one-off ... to a reference point one week after the peak in egg laying, consistent with Standard Method A3 of the CCAMLR ... of the breeding population obtained by adjusting a one-off count using availability adjustment factors ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 229–241 : Author(s): Southwell, C., J. McKinlay, L. Emmerson, R. Trebilco and K. Newbery
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Discrimination of Macrourus whitsoni and M. caml (Gadiformes, Macrouridae) using otolith morphometrics
of the two species of grenadier. Models to estimate fish length, weight and age from otolith parameters ... of toothfish reduces. In order to improve information on the spatial distribution, age-frequency and relative ... to improve information on the spatial distribution, age-frequency and relative importance of grenadiers ... species of grenadier. Models to estimate fish length, weight and age from otolith parameters are also ... using otolith morphometrics to reach 80% of the mean maximum length and one specimen was aged at 62 ... 80 60 40 20 0 10 20 30 40 50 60 70 Age (years ... of fish age (years). ot o_ w ei gh t ( m m 2 ) 400 300 200 100 0 0 10 20 ... 30 40 50 60 70 Age (years) (c) R ou nd ne ss Age (years) 0.7 0.6 ...
Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 15–28 : Author(s): Pinkerton, M.H., C. Ó Maolagáin, J. Forman and P. Marriott
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Distribution of krill (Euphausia superba Dana) catches in the South Shetlands and South Orkneys
December to March was taken within 40 km of the coast, and 90% within 80 km in all years 1988 to 1991 ... % of the catch in Subarea 48.1 from December to March was taken within 40 km of the coast, and 90% within 80 km ... and South Orkneys Abstract / Description: A set of concentric zones of 20 km width was defined around ... in all years 1988 to 1991. In 1987, 1988 and 1991, 75% of the catch in Subarea 48.2 between December ... within 40 km of the coast, and 90% within 80 km in all years 1988 to 1991. In 1987, 1988 and 1991,75 ... to 90 km radius of breeding sites at these times of year: Ad6lie penguin, 50 to 80 km (Everson, 1987 ... a moins de 40 km de la cote, et 90% a moins de 80 km de 1988 a 1990. En 1987 et 1988, de decembre a mars ... no MapT 6bIJIO nOJIY'-IeHO B pa,l{Hyce 40 KM OT 6epera H 90% B pa,l{Hyce 80 KM OT 6epera. B 1987 H 1988 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 287–303 : Author(s): Agnew, D.J.
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Telemetry monitoring of ecological resources
recorders for this application. These systems are usually used to monitor from one to four animals ... positions. On the next satellite orbit two additional p!J,ssible"" ' ~.' , positions are determined. One ... and lasting about one year are routinely being deployed on caribou23 , Antarctic seals and polar bear ... . YKB3blBBIOTCH OrpBHMqeHMH Beca, AanbHOCTM CBH311 M cpOKa cnym6bl BnnapaTYPbl. .l(aeTcH o61I\oe on ... of telemetry and location monitoring are discussed. Limitations on weight, communication range and ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 495-511 : Author(s): Kuechle, V.B.
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Some thoughts on precautionary measures for the krill fishery
on the potential yield model developed by the CCAMLR Scientific Committee039;s Working Group on Krill (WG-Krill ... , the total number of krill leaving A in one year is also equal to @' . If M is the rate of natural mortality ... , the total prey consumed in one year is given by: Thus: substituting equations ... decisions. One of the common ways of obtaining information about a harvested marine resource ... that the concept of precautionary measures was developed. A precautionary measure is one that, on an intuitive ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 1–11 : Author(s): Everson, I. and W.K. de la Mare
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Management and assessment options for the crab fishery around South Georgia
must be given to their design. One of the main aims in designing a management plan is to allow ... must be given to their design. One of the main aims in designing a management plan is to allow ... . Such an approach includes the use of catch/effort controls in addition to the 039;size-sex-season039; controls ... and others with eyed eggs. Such an understanding can only be gained from at least one year's time series ... easily enforced than several small ones. Two general points regarding the implementation of refuges ... to their design. One of the main aims in designing a management plan is to allow the fishery to develop at a rate ... In 1992 a fishery for the lithodid crab, Paralomis spinosissirna, w a s s tar ted by one fishing ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 193–202 : Author(s): Basson, M. and D.D. Hoggarth
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Foraging behaviour and reproductive success in chinstrap penguins: the effects of transmitter attachment
Islands. In total, one member of each pair at 20 nests and both members of each pair at 10 nests were ... to one or both members of a breeding pair; and (iii) variability in foraging patterns of penguins ... between trip durations obtained by applying the transmitters to one or both members of a breeding pair ... members equipped with a transmitter fared worse than both the control group and the group with only one ... Islands. In total, one member of each pair at 20 nests and both members of each pair at 10 nests were ... of transmitters per nest increased from zero, to one, to two (P < 0.005). 295 Of the 12 nest failures ... prior to 10 January. Three of the 20 nests with one mate instrumented failed before the first nest ... check on 30 December (the instrumented birds could not be located visually, although one was regularly ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 291–303 : Author(s): Croll, D.A., J.L. Bengtson, P.L. Boveng, M.E. Goebel and J.K. Jansen