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Fatty acid and stable isotope analyses to infer diet of Antarctic toothfish caught in the southern Ross Sea
Paper Title: Fatty acid and stable isotope analyses to infer diet of Antarctic toothfish caught ... compared to lipid profiles of fish and invertebrate species taken as by-catch in the fishery or collected ... from the stomachs of toothfish. Stable carbon and nitrogen isotope ratios were also determined to ... further identify feeding relationships between these species. The aim of this study was to establish the ... ). In addition, the stomach contents may represent only a snapshot of the dietary items con- sumed at a ... at 1 000 m. Survey area was in the south of SSRUs 881J and L (after Hanchet et al., 2012). 60 °S ... the six stations which could not be completed due to bad weather and time constraints at the end of ... ’ Society (AOCS, 1998). The extracted lipids were saponified at 100°C for 7 min with 1.5 ml of 0.5 N NaOH ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 21–36 : Autor(es): Jo, H.-S., I. Yeon, C. Lim, S.M. Hanchet, D.-W. Lee and C.-K. Kang
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Can we use discriminant function analysis to sex penguins prior to calculating an index of a morphometric characteristic?
index of a morphometric characteristic? Abstract / Description: In sexually dimorphic species ... discriminant analysis can be used to determine the sex of individuals, it is only able to correctly sex a ... certain proportion of birds. Two overlapping normal distributions are used to show that there is a ... using discriminant analysis. When discriminant functions are able to correctly determine the sex of ... size required in order to be 80% certain of detecting the difference at the 5% level of significance ... is shown in Table 1. At sample sizes of less than 300 for each sex, using a discriminant function ... sample at the extreme of the sex ratio variation, with ~* and a*, then 112 -Il * 'Y ... the sex ratios at the time of sampling. This could be done for a small sample by cloacal examination ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 259–272 : Autor(es): Agnew, D.J.
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A quantified Bayesian Maximum Entropy estimate of Antarctic krill abundance across the Scotia Sea and in small-scale management units from the CCAMLR-2000 Survey
Paper Title: A quantified Bayesian Maximum Entropy estimate of Antarctic krill abundance across ... : A probabilistic Bayesian Maximum Entropy (MaxEnt) technique was used to estimate the abundance of ... Survey of Area 48 (CCAMLR-2000 Survey) and to map the density distribution of krill across the survey ... area. Density values for the unsurveyed off-transect portions of the survey area were inferred, and ... integration at a given latitude and longitude, and hence the data space is two-dimensional. A set of point ... follows: Suppose an enormous number N of individual krill are thrown, one by one and at random, into ... can be chosen at run-time. This has enabled much deeper explora- tion of the effect of these values ... calculation of standard deviation (Gull and Skilling, 1991). It is prudent to note, when looking at the bio ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 97–116 : Autor(es): Heywood, B.G., A.S. Brierley and S.F. Gull
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Growth and natural mortality of Patagonian rockcod (Patagonotothen guntheri shagensis) from Shag Rocks shelf
Paper Title: Growth and natural mortality of Patagonian rockcod (Patagonotothen guntheri ... shagensis) from Shag Rocks shelf Abstract / Description: The parameters of Bertalanffy’s growth equation ... -weight data of research and fishery survey cruises in the Shag Rocks area from 1978 to 1986. The natural ... mortality rate was assessed by six different methods and was within a range of 0.63 to 1.06. The mean value ... of 2 to 5 years are most abundant. Sexual maturity is attained by fish at 11 to 13 cm length, 20 to ... ) reported that the length of fish at first maturation is 11 to 13 cm (Le. 2 years old). According to their ... data, 50% of fish attain sexual maturity at a length of 15.6 to 16.5 cm. 115 Our observations ... estimated at 2.5 years. Hence, with T =2.5 years, the natural mortality rate will be 0.73. The range of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 111–121 : Autor(es): Shlibanov, V.I.
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Chilean krill fishery: analysis of the 1991 season
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 ... fishing in Subarea 48.1 is particularly intense near CEMP sites. Other ways of using of haul-by-haul data ... catches (SC-CAMLR 1988, paragraph 2.26). At its 1989 meeting, WG-KriU agreed that analyses of haul-by ... the processing capability of the vessel and as a rule does not exceed 10 tonnes at the time. The ... -per-day was 108 tonnes, a maximum of 160 tonnes was obtained at the end of the season. A total of 419 ... WG-KRILL-9l/39 CHILEAN KRILL FISHERY: ANALYSIS OF THE ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 273–287 : Autor(es): Marín, V.H., A. Mujica and P. Eberhard
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By-catch of fish in the krill fishery
Paper Title: By-catch of fish in the krill fishery Abstract / Description: Observations are ... reported of icefish being taken as by-catch during krill fishing operations from a research vessel. The ... results indicate that the by-catch of fish in the commercial krill fishery may be significant in some ... areas of the South Georgia shelf. The problem is thought to be least in open ocean krill fishing. File ... commercial fleet in the area. Position at the end of each haul was recorded along with maximum and minimum ... Myctophidae Catches of Myctophidae tended to occur over deep water, in some instances at a great distance ... that we have reported here were obtained during the first few months of the year. Krill fishing at ... of Trawling, i-Water Depth at End of Trawling, j-Minimum Depth of Footrope of Net, k-Maximum Depth ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 381–401 : Autor(es): Everson, I., A. Neyelov and Y.B. Permitin
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Large-scale peculiarities of phytocenosis species composition in the surface layer in the Antarctic Atlantic and Indian Ocean sectors
Paper Title: Large-scale peculiarities of phytocenosis species composition in the surface layer ... dominated over vast areas within the distribution of the south peripheral waters and the centre of the ... Weddell Gyre. In the eastern Weddell Gyre a great change in the composition of phytoplankton species was ... , the Convergence Zone proper, south periphery of the Antarctic Circumpolar Current). A great change in ... to take plankton samples. Filtration was usually conducted at a speed of 1 litre per 1-2 minutes ... typical for this region. It is quite natural because at least waters of three types are present there. In ... waters. C. criophilum was dominant in samples taken at later dates. A substantial proportion of T ... of eddies. Higher phytoplankton biomass on tack V at 58° to 59°S (see Figure 6) and on tack VI at 59 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 201-214 : Autor(es): Makarov, R.R. and K.P. Fedorov
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Long-term monitoring of krill recruitment and abundance indices in the Elephant Island area (Antarctic Peninsula)
Paper Title: Long-term monitoring of krill recruitment and abundance indices in the Elephant ... for the Elephant Island area with regard to the representativeness of the study area (60°-62 o 30´S ... interannual variability of krill recruitment is confirmed by the present analysis. Results are compared for ... an analysis of variance. File: 02siegel-etal.pdf ... generally reaches its maximum at the end of December (Siegel, 1988). This maximum can be observed until ... distribution range varies seasonally, and at the same time a spatial succession of size/age groups occurs in ... islands and therefore are at least partly under the influence of prolonged retention times. Little ... highest density values were observed at the beginning of the time series. The hypergeometric ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 19–35 : Autor(es): Siegel, V., W. de la Mare and V. Loeb
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Marine mammals and demersal longline fishery interactions in Crozet and Kerguelen Exclusive Economic Zones: an assessment of depredation levels
Exclusive Economic Zones: an assessment of depredation levels Abstract / Description: Interactions between ... whales. These two species, alone or in co-occurrence with each other, were observed in 71% of the 1 308 ... two species, alone or in co-occurrence with each other, were observed in 54% of the 6 262 longlines ... monitored. Interactions were observed in all fishing areas. The effect of depredation was assessed by ... event during which animals of both species were reported at least once during the same haul. The rate ... 2005 C um ul at ed e ff ec ti ve s of id en ti fi ed in di vi du al s 2003 ... fi sheries: modalities of opportunistic feeding for bottlenose dolphins at Lampedusa Island (Italy ... EXCLUSIVE ECONOMIC ZONES: AN ASSESSMENT OF DEPREDATION LEVELS C. Roche and C. Guinet CEBC-CNRS, UPR 1934 ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 67–82 : Autor(es): Roche, C., C. Guinet, N. Gasco and G. Duhamel
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Biomass, abundance and distribution of fish in the Kerguelen Islands EEZ (CCAMLR Statistical Division 58.5.1)
Paper Title: Biomass, abundance and distribution of fish in the Kerguelen Islands EEZ (CCAMLR ... conducted from September to October 2006 in the northern part of the Kerguelen Plateau (CCAMLR Statistical ... stratified stations. Estimates of biomass and abundance were produced for eight commercial species. The total ... biomass was 245 000 tonnes and Patagonian toothfish (Dissostichus eleginoides) accounted for half of the ... included in CCAMLR Statistical Division 58.5.1. The zone is located at the northern tip of the Kerguelen ... at South Georgia (Kock, 1992). The discovery of a deep-sea stock of Patagonian tooth- fish ... . The krigeage method used was the point kriging, which estimates the values of the points at the grid ... on Everson’s scale with modes at 35 and 38 cm, ages 4 and 5, 4.78 million specimens, 22.5% of fish ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 1–32 : Autor(es): Duhamel, G. and M. Hautecoeur