Search results
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Integrating Count Effort by Seasonally Correcting Animal Population Estimates (ICESCAPE): a method for estimating abundance and its uncertainty from count data using Adélie penguins as a case study
present one week after the peak in egg laying (Southwell et al., 2010). Software to implement the method ... for availability bias by stand- ardising to a point seven days after the peak in egg laying (Southwell et al ... season when there are generally twice as many adults present as breeding pairs at the beginning ... reported measures of uncertainty associated with originally published counts are propagated through to the ... , the method is applied to several examples of published studies of Adélie penguin abundance at breeding ... breeding pairs, although the software has been developed to accommodate adjustment and aggregation of other ... Adélie penguins, the method and implementation is sufficiently general to be easily adapted for other ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 213–227 : Author(s): McKinlay, J., C. Southwell and R. Trebilco
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Size and density of krill layers fished by a Japanese trawler in the waters north of Livingston Island in January 1988
tows during which a layer did not end. The density thus calculated ranged from 1.43 to 52.07 g/m3 ... and thickness of layers were underestimated because the trawler curtailed the haul before the layer ended in 30 ... . After the co-operative survey with the trawler, RV Kaiyo Maru sailed around the fishing ground in order ... . On lines B-F, Land N, layers never ended. The longest layer was recorded on line C which is more than 18.5 ... Paper Title: Size and density of krill layers fished by a Japanese trawler in the waters north of ... Livingston Island in January 1988 Abstract / Description: The size and density of fishable krill layers in ... the northern waters of Livingston Island were determined during the co-operative survey carried out by ... RV Kaiyo Maru and a Japanese trawler. The mean values of layer length, thickness and surface density ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 339–345 : Author(s): Endo, Y. and Y. Shimadzu
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Status of the coastal stocks of Dissostichus spp. in East Antarctica (Divisions 58.4.1 and 58.4.2)
Antarctica estimate of the total biomass at the beginning of the season (e.g. Agnew and Pearce, 2004 ... . One fish tagged in the west of SSRU 5841C in 2006 was recaptured 3 km distant after 391 days ... at liberty. One tagged in the east of SSRU 5841C in 2007 was recaptured 147 km east in SSRU 5841D after 419 ... in SSRU 5841G after 391 days at liberty; it is interesting that both of these fish had moved east after ... Paper Title: Status of the coastal stocks of Dissostichus spp. in East Antarctica (Divisions ... operating off the coast of East Antarctica (30°E–150°E; FAO/CCAMLR Divisions 58.4.1 and 58.4.2) since 2003 ... . An experiment run from 2005 to 2008 required the tagging of toothfish as a prerequisite for ... participation in the fishery, with only some Small-scale Research Units (SSRUs, consisting of 10° longitude ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 71–100 : Author(s): Agnew, D.J., C. Edwards, R. Hillary, R. Mitchell and L.J. López Abellán
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Biological parameters for icefish (Chionobathyscus dewitti) in the Ross Sea, Antarctica
zone to the date when the ith fish was captured. Hence, ti,1 = ti, end first opaque zone – ti ... , spawning date ti,2 = (ni + w) – 1 ti,3 = ti, capture – ti, end last opaque zone (4) where ni = the total ... number of opaque zones present for fish i; w = an edge interpretation correction after Francis et al ... after the date when opaque zones are assumed to be completed; w = –1 if the recorded margin state ... Paper Title: Biological parameters for icefish (Chionobathyscus dewitti) in the Ross Sea ... during the 2005/06 fishing season. These observers were placed on board three longline vessels targeting ... Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea (CCAMLR Subareas 88.1 and 88.2). Biological data ... , meristics, reproductive biology, diet and age estimation. All of the icefish sampled were identified as ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 139–165 : Author(s): Sutton, C.P., M.J. Manning, D.W. Stevens and P.M. Marriott
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Results of fish stock assessment survey, South Georgia region, November - December 1986
by the end of 1987/88 or the beginning of 1988/89. Although estimates of biomass of C. aceratus have been ... between 29 November and 17 December 1986 by the R.V. Professor Siedlecki using a Polish B-454 otter trawl ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 143-183 : Author(s): Gabriel, W.L.
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Spawning locations of mackerel icefish at South Georgia
"s at the western end of South Georgia and longitude 37"W. In addition, Shag Rocks was treated as a separate ... spent females were present off Cumberland Bay and at the western end of South Georgia. No data were ... to the north of South Georgia and the fourth close to Drygalski Fjord at the eastern end of the island ... -January 1986/87 (Figure 5). The greatest number of larvae was caught at the nearshore end ... : Historical information on the distribution of spawning and larval mackerel icefish (Champsocephalus gunnari ... inshore spawning at South Georgia during April within and close to the bays on the north side of the ... island. Some spawning almost certainly occurs over much of the island shelf, although is this appears to ... . There are also indications of a possible second spawning season in January, although the evidence is ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 107–118 : Author(s): Everson, I., A.W. North, A. Paul, R. Cooper, N.C. McWilliam and K.-H. Kock
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Acoustic estimates of krill density at South Georgia, 1981 to 1998
; by convention the year given refers to the year in which the season ended) BAS has conducted annual (i.e. 1996 ... using one or other of these approaches, and values reported for cruises after this time are thus what ... their effective start and end positions for the analyses reported here were often constrained only ... ends of South Georgia (1990, 1994, 1996, 1997 and 1998), four years exhibited greater density ... 11 austral summers between 1981 and 1998 are presented. Krill density at the island fluctuated widely ... from year to year over that time, ranging from ≈ 2 to ≈ 150 g m-2 (fresh mass). The 1982, 1991 and ... % confidence limits <15 g m-2). For five of the summers between 1990 and 1998 it was possible to calculate ... density was higher to the east. File: 04brierley-etal.pdf ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 47–57 : Author(s): Brierley, A.S., J.L. Watkins, C. Goss, M.T. Wilkinson and I. Everson
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Distribution and size–age composition of Antarctic krill (Euphausia superba) in the South Orkney Islands region (CCAMLR Subarea 48.2).
-spawning krill at stage IV constituted about 50% of all krill in the catches. By the end of January ... % in January to 4.5% by the end of March. Discussion The high interannual variability in krill size ... Islands could finish spawn- ing at the end of summer near the South Orkney Islands. Thorough analysis ... in this study suggest that age 2+ krill probably influx into the South Orkney Islands region after spawning ... Paper Title: Distribution and size–age composition of Antarctic krill (Euphausia superba) in the ... South Orkney Islands region (CCAMLR Subarea 48.2). Abstract / Description: The distribution, size–age ... composition and biological condition of Antarctic krill (Euphausia superba) caught by the Russian krill ... trawler FV Maxim Starostin in Subarea 48.2 between January and March in 2009 and 2010 are described. The ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 123–134 : Author(s): Sologub, D.O. and A.V. Remeslo
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Chilean krill fishery: analysis of the 1991 season
total catch-per-day was 108 tonnes, a maximum of 160 tonnes was obtained at the end of the season ... near Livingston Is. and ended 25 March near Elephant Is. (Figure 6). This pattern of movement ... of the hauls. The results show that the autocorrelation function for both variables "dies out" after five ... hauls, suggesting that on average the vessel move away from a patch after five hauls. This result ... Paper Title: Chilean krill fishery: analysis of the 1991 season Abstract / Description: This ... paper summarises Chilean catch data for 1991. Special emphasis is given to the analysis of haul-by-haul ... data and its use in studying small-scale spatial distribution of catches. The results show that krill ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 273–287 : Author(s): Marín, V.H., A. Mujica and P. Eberhard
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Low genetic diversity in the Antarctic toothfish (Dissostichus mawsoni) observed with mitochondrial and intron DNA markers
and digestion with proteinase-K at 55°C for 4 h. After digestion, DNA was extracted with phenol:chloroform ... A ~0.7 kb fragment including the 3’ end of the cytochrome b gene, tRNA-Thr, tRNA-Pro, and a 5’ fragment ... to be mainly pelagic, after which they become benthopelagic (Roshchin, 1997). Juveniles have been caught ... ). Of the 13 recaptures, there was one long-distance movement, almost 800 km north (72°S) after 3.3 years ... Paper Title: Low genetic diversity in the Antarctic toothfish (Dissostichus mawsoni) observed ... digests of nine sub-regions of the mitochondrial genome. Polymorphisms were found in four of seven introns ... digested with the restriction enzymes, but there was no population differentiation among the three sea ... areas. Direct sequencing of cytochrome b (665 bp) and the left domain of the control region (639 bp ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 43–51 : Author(s): Smith, P.J. and P.M. Gaffney