Resultados de la búsqueda
-
On the instantaneous natural mortality rate of Champsocephalus gunnari, South Georgia (Subarea 48.3)
Paper Title: On the instantaneous natural mortality rate of Champsocephalus gunnari, South ... Georgia (Subarea 48.3) Abstract / Description: The instantaneous rate of natural mortality (M) of ... composition of catches from 1964/65 to 1968/69 and the age/length key for the first half of 1972 were used in ... the calculations. The results provided a wide range of estimates for M. The discussion of the results ... address the question once again in 1990 at the Ninth Meeting of CCAMLR. Taking the above factors into ... values M is taken to be the one at which the estimate of the independent parameter a is close to zero ... independent of time at which data on size composition was collected. Size composition components are ... done at various levels of natural mortality which were used to construct the following regression ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 313–326 : Autor(es): Frolkina, G.A. and R.S. Dorovskikh
-
Midwater trawl catchability in relation to krill and possible ways of assessing gross catch
Paper Title: Midwater trawl catchability in relation to krill and possible ways of assessing ... the basis of data obtained from AtlantNIRO expeditions from 1983 to 1990 in the Scotia Sea. A ... methodology was developed for and applied to determining the rate of krill filtration through the trawl rope ... and netting and also the probability that krill will come into contact with various parts of the net ... Modeling the Process of Krill Fishing In order to determine the rate at which krill pass through the ... , total catchability decreases. At the same time an assessment of krill escapement through the trawl ... . Implementation of this method meant that at any given moment it was possible to take a large volume of kriU in ... of kriU contact with the net at between 26 and 29%. Trawl 74/416 achieved a rate of 9.2 to 13.3% and ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 87–113 : Autor(es): Zimarev, Yu.V., S.M. Kasatkina and Yu.P. Frolov
-
Results of fish stock assessment survey, South Georgia, December 1987 - January 1988
Paper Title: Results of fish stock assessment survey, South Georgia, December 1987- January 1988 ... complements earlier surveys in the same area and showed that most of the stocks are continuing to decline ... . Notothenia rossii is showing no signs of recovery and Champsocephalus gunnari is likely to continue declining ... measures aimed at rebuilding the stocks of N. rossii and maintaining the other fish resources in the ... largest tow was at station 86, yielding 428 kg. This represents 13% of the catch of this species. Most of ... form a smaller mode at about 32 cm in 1987/88. Fifty percent of the fish in the 22 - 25 cm size range ... are mature (Lso) (Kock et al. 1985). based on survey catches 44% of the population was at or below ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 19-52 : Autor(es): McKenna, Jr., J.E. and S.B. Saila
-
Quantifying movement behaviour of vessels in the Antarctic krill fishery
Paper Title: Quantifying movement behaviour of vessels in the Antarctic krill fishery Abstract ... / Description: Ten years of recent fine-scale haul-by-haul krill data were used to characterise the behaviour ... of the krill fishery. Analysis of distance between hauls in relation to their catch level revealed a ... number of fishing grounds within this area. The same patterns were observed for vessels from other ... krill fishing operations and the ecosystem will need to capture, at least, the important dynamics of ... within the CAMLR Convention Area (Kawaguchi and Nicol, 2007). At the end of each fishing season, each ... ). Figure 1 is a schematic diagram of how the fac- tory operates on a conventional krill trawler. At the ... reservoir, resulting in a volume (Rn) of the initial catch. As the factory tries to operate at an ‘Optimal ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 131–148 : Autor(es): Kawaguchi, S. and S.G. Candy
-
Feeding and food intake of Electrona carlsbergi (Tåning, 1932) Myctophidae
Paper Title: Feeding and food intake of Electrona carlsbergi (Tåning, 1932) Myctophidae Abstract ... by various methods was from 3.7 to 5.6% of fish body weight. The amount of food consumed by E ... . carlsbergi during the year in the waters to the south of the Antarctic Convergence is about 15 times fish ... during the cruise of RV Artemida. A sample of at least 25 fish were taken from every catch for ... basic data for estimation of the annual and mean daily food intake of fish at age 2 and 3. The annual ... 109.6 g or 1 480% of body weight. The annual food intake of females is estimated at 86.9 kcal. This ... 20.30 - 0.30 4 17.1 - 7.9 x at a digestion rate of 16.40/000 per hour xx at a digestion rate of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 411–416 : Autor(es): Gerasimova, O.V.
-
Distribution and abundance of Macrourus carinatus on BANZARE Bank in the southern Indian Ocean
Paper Title: Distribution and abundance of Macrourus carinatus on BANZARE Bank in the southern ... Indian Ocean Abstract / Description: This paper provides an assessment of the distribution and abundance ... of Macrourus carinatus on BANZARE Bank in the southern Indian Ocean (Divisions 58.4.1 and 58.4.3 ... ) based on results from a trawl survey in 1999. This is the first quantitative assessment of M. carinatus ... interesting question to address once more data become available. At present, there are few estimates of ... provides the first quantitative assessment of this species at BANZARE Bank in the southern Indian Ocean ... located in the southern Indian Ocean on the border of Divisions 58.4.1 and 58.4.3 (Figure la). At 2 300 ... haul was conducted at one of five random locations. Alternative locations were provided in the event ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 171–178 : Autor(es): van Wijk, E.M., A.J. Constable, R. Williams and T. Lamb
-
Diet study of Antarctic toothfish caught in the east Antarctic based on stomach content, fatty acid and stable isotope analyses
Paper Title: Diet study of Antarctic toothfish caught in the east Antarctic based on stomach ... isotope ratios were determined and compared with those of species caught as by-catch and collected from ... lesser extent squid. FA profiles in muscle tissues of Antarctic toothfish were very similar to those of ... between them. δ 15 N values of Antarctic toothfish were higher than for the other species collected ... food categories con- sidered at a given taxonomic level. To assess the precision of the index values ... described by Metcalfe et al. (1966). The extracted lipids were saponified at 100°C for 2 h with 1.5 ml of ... analyser to oxidise at high tem- perature (1 030°C). The resultant gases of CO2 and N2 were introduced ... the number, 88.7% of the weight and 90.2% of the IRI (Table 3). It was assumed at the time that the ...
Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 29–44 : Autor(es): Park, H.J. , I. Yeon, E. Han, Y.J. Lee, S.M. Hanchet, G.W. Baeck, Y. Kwon, S.G. Choi, D.W. Lee and C.K. Kang*
-
Fitting Euphausia superba into Southern Ocean food-web models: a review of data sources and their limitations
Paper Title: Fitting Euphausia superba into Southern Ocean food-web models: a review of data ... include krill in food-web models and to guide modellers to key sources of data. It describes the strengths ... of each method of sampling krill, i.e. with nets (for historical time series, demographic information ... . Temporally, the intense (order of magnitude) interannual variability in krill population size within the ... . Note that the biomass estimate presented here for Area 48 is at the lower end of a wide range of ... ; Fielding et al., 2012). It is uncertain whether krill occupy all components of habitat at all times ... aspects of their biology such as mating at depth (Kawaguchi et al., 2011), overwintering (Meyer, 2012 ... , found clear evidence of avoidance during the day but not at night (Everson and Bone, 1986); (ii) a ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 219–245 : Autor(es): 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)
-
Characteristics of krill aggregations in the South Sandwich Islands subarea in January–February 2000
Paper Title: Characteristics of krill aggregations in the South Sandwich Islands subarea in ... January–February 2000 Abstract / Description: During the survey of Subarea 48.4 from 17 January to 1 ... swarms. Differences between spatial distribution patterns of different krill aggregation forms in ... characteristics of some 2 400 krill swarms detected in the study area were sized acoustically and are described in ... Atlantida. Acoustic measurements were made using a Simrad EK500 echosounder at frequencies of 38, 120 and ... ). Non-aggregated and scattered forms observed at depths below 80 m were confi ned to zones of sinking ... le 1 : Pr in ci pa l p ar am et er s of th e m id w at er tr aw l P T 7 2/ 30 8 ... s tr at um no n- ag gr eg at ed fo rm s sc at te re d fo rm s fi el d s of s w ar ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 145–164 : Autor(es): Kasatkina, S.M., A.P. Malyshko, V.N. Shnar and O.A. Berezhinsky
-
Quantification of Southern Ocean phytoplankton biomass and primary productivity via satellite observations and biogeochemical models (submitted to the 2008 Joint CCAMLR-IWC Workshop)
Paper Title: Quantification of Southern Ocean phytoplankton biomass and primary productivity via ... / Description: This paper reviews Southern Ocean primary productivity within the framework of satellite remote ... sensing and the development of food-web models. The satellite ocean colour (chlorophyll) data record is ... Temperature Scanner (OCTS), the Seaviewing, Wide Field of view Sensor (SeaWiFS), the Moderate Resolution ... quantification of the global distribution of primary productivity, but also temporal changes at time scales ... at 4 km and 9 km (this image) spatial resolution. In all figures of this type, the northern and ... not significant at the 95% confidence level. The SAM accounted for only 31% of the var- iability in ... north of the SBACC that are picoplankton/salp dominated with lower abundance at higher trophic levels ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 247–265 : Autor(es): P.G. Strutton, N.S. Lovenduski, M. Mongin and R. Matear