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Variations in condition indices of mackerel icefish at South Georgia from 1972 to 1997
Paper Title: Variations in condition indices of mackerel icefish at South Georgia from 1972 to ... predominantly on krill. An index of condition which uses the ratio of the measured total mass to the estimated ... mass is shown to provide a good indicator of local krill density. The index is likely to be little ... responds rapidly to changes in krill density and therefore can provide indications of short-term variations ... CONDITION INDICES OF MACKEREL ICEFISH AT SOUTH GEORGIA FROM 1972 TO 1997 I. Everson %3 British Antarctic ... 40°W and 44"W. The series of data have been grouped by month, beginning in August 1972 and ... success. Year ct FUSE CEPE MAPE Nov Dec Jan Feb Mar Trip Surv Meal S Meal S Comparison of Condition ... directly to the diet of each of the three species. These are fur seal foraging trip duration and pup ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 119–132 : Autor(es): Everson, I. and K.-H. Kock
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Assessing the power to detect systematic change in Adélie penguin foraging trip duration
duration Abstract / Description: Models of variability in Adélie penguin foraging trip durations were ... Paper Title: Assessing the power to detect systematic change in Adélie penguin foraging trip ... variability among years was greater in the guard stage. Estimates of variability were used to explore the ... greater in the crèche stage than the guard stage. The gain obtained by increasing the number of penguins ... %. The strategy of including ice cover as a covariate to explain between-year variation in trip duration ... ; Croxall et al., 1988). Foraging trip duration is one of the parameters recommended for measurement under ... to changes in prey availability are seen as ‘good’ characteristics of foraging trip ясельной ... penguin foraging trip duration duration and of ecosystem indicators in general (Landres et al., 1988 ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 201–215 : Autor(es): Southwell, C., J. Clarke and L.M. Emmerson
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Status of the coastal stocks of Dissostichus spp. in East Antarctica (Divisions 58.4.1 and 58.4.2)
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 ... the coaStal StockS of Dissostichus Spp. in eaSt antarctica (DiviSionS 58.4.1 anD 58.4.2) D.J. Agnew ... . have been operating off the coast of East Antarctica (30°E–150°E; FAO/CCAMLR Divisions 58.4.1 and ... been operating on the continental shelf and shelf slope off the coast of East Antarctica (30°E–150°E ... has never managed to take more than 48% of the catch limit in Division 58.4.2. In the east (Division ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 71–100 : Autor(es): Agnew, D.J., C. Edwards, R. Hillary, R. Mitchell and L.J. López Abellán
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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 ... east Antarctic, their stomach contents, fatty acid (FA) compositions and stable carbon and nitrogen ... 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 ... Science, Vol. 22 (2015): 29–44 29 Diet study of Antarctic toothfish caught in the east Antarctic based ... slope of east Antarctica in the Indian Ocean and Atlantic Ocean sectors. The characterised ... ratios of the Antarctic toothfish and their potential prey species from the east Antarc- tic (SSRU 5841C ... first study on the trophic ecology of D. mawsoni that has been conducted in the east Antarctic. very ...
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*
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Comparison of two methods to assess fish losses due to depredation by killer whales and sperm whales on demersal longlines
Paper Title: Comparison of two methods to assess fish losses due to depredation by killer whales ... interaction over access to resources, which often includes a combination of socio-economic, ecological and ... conservation issues. However, estimating the amount of resource depredated can be especially challenging when ... aimed at providing two indirect methods of assessment of depredated biomass over an 11-year period (2003 ... , such as estimating the amount of biomass loss caused by predators. While these losses can be directly ... loss. This study therefore aims to: (i) update the pre- vious estimation of the level of depredation ... tested by analysing the influence of the CPUE in the absence of odontocetes on the CPUE loss caused by ... absence and the presence of odontocete depredation and estimated a mean CPUE loss per cell (c). CPUE ...
Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 1–14 : Autor(es): Gasco, N., P. Tixier, G. Duhamel and C. Guinet
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Further computations of the consequences of setting the annual krill catch limit to a fixed fraction of the estimate of krill biomass from a survey
Paper Title: Further computations of the consequences of setting the annual krill catch limit to ... a fixed fraction of the estimate of krill biomass from a survey Abstract / Description: Butterworth ... et al. (1992) put forward an extension of the harvesting model of Beddington and Cooke (1983) to ... relate potential krill yield to a pre-exploitation survey estimate of krill biomass. In this paper, the ... / l2 to 5/12), while the pre-exploitation biomass survey is assumed to take place in the middle of ... middle of the growth season their mass-at-age (E,) is thus: For model 1, the spawning biomass of krill ... . and for model 2: The survey estimate of biomass is made in the middle of the growth season (i.e. mid ... sum of the increase in biomass, the catch made by the fishery, and the loss to natural predators ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 81–106 : Autor(es): Butterworth, D.S., G.R. Gluckman, R.B. Thomson, S. Chalis, K. Hiramatsu and D.J. Agnew
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Growth and age/length structure of populations of Notothenia (Lepidonotothen) squamifrons (Nototheniidae) in various areas of the Indian sector of the Southern Ocean
Paper Title: Growth and age/length structure of populations of Notothenia (Lepidonotothen ... ) squamifrons (Nototheniidae) in various areas of the Indian sector of the Southern Ocean Abstract / Description ... : Age, growth and age/length composition of populations of grey rockcod (Notothenia (Lepidonotothen ... ) squamifrons), inhabiting areas of the Ob and Lena Banks and the Kerguelen Island Shelf, are presented in this ... (1969 to 1972), and during the period reflecting the current state of the exploited population (1980 to ... Islands. The age of these fish varied from 1 to 15 years. In the first years of the fishery (1969 to 1972 ... WG-FSA-89/16 GROWTH AND AGE/LENGTH STRUCTURE OF ... POPULATIONS OF NOTOTHENIA (LEPIDONOTOTHEN) SQUAMIFRONS (NOTOTHENIIDAE) IN VARIOUS AREAS OF THE INDIAN SECTOR ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 123–139 : Autor(es): Zaitsev, A.K.
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The error of the biomass estimate as a function of survey parameters and the statistics of a density field of krill aggregations
Paper Title: The error of the biomass estimate as a function of survey parameters and the ... statistics of a density field of krill aggregations Abstract / Description: Simple relationships expressing ... the dependence of relative sampling error in a biomass estimate (from a survey) on the statistical ... characteristics of the fish concentration density field and on parameters of the survey itself, have been derived ... . 1962. Cal~ulus of pro~abilitie8. State pub- lishing house of physics and mathematics lite- rature ... - 213 - SC-CAMLR-VI/BG/39 THE ERROR OF THE BIOMASS ... ESTIMATE AS A FUNCTION OF SURVEY PARAMETERS AND THE STATISTICS OF A DENSITY FIELD OF KRILL AGGREGATIONS ... Z.I. Kizner (USSR) Abstract Simple relationships expressing the dependence of relative sampling ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 213-228 : Autor(es): Kizner, Z.I.
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Revised estimates of seabed areas within the 500 m isobath of the South Orkney Islands (subarea 48.2) and consequences for standing stock biomass estimates of nine species of finfish
Paper Title: Revised estimates of seabed areas within the 500 m isobath of the South Orkney ... Islands (subarea 48.2) and consequences for standing stock biomass estimates of nine species of finfish ... Abstract / Description: A revised bathymetric map of the South Orkney Islands (Subarea 48.2) was generated ... , areas of seabed within the 500 m isobath (i.e. 0-500 m) were computed for 50 m depth intervals. Areas ... REVISED ESTIMATES OF SEABED AREAS WITHIN THE 500 M ISOBATH OF THE SOUTH ORKNEY ISLANDS (SUBAREA 48.2) AND ... CONSEQUENCES FOR STANDING STOCK BIOMASS ESTIMATES OF NINE SPECIES OF FINFISH C.D. Jones National Oceanic ... Resources Program PO Box 271, La Jolla, Ca. 92038, USA Abstract A revised bathymetric map of the South ... longitude. From the integrated datasets, areas of seabed within the 500 m isobath (i.e. 0-500 m) were ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 197–204 : Autor(es): C.D. Jones
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Breeding numbers and success of Eudyptes penguins at Marion Island, and the influence of mass and time of arrival of adults
Paper Title: Breeding numbers and success of Eudyptes penguins at Marion Island, and the ... influence of mass and time of arrival of adults Abstract / Description: At sub-Antarctic Marion Island ... , there was substantial correlation in the numbers of adults breeding at study colonies of macaroni ... filholi) over 22 years, suggesting that overwintering conditions may influence the proportions of birds ... rockhopper penguins. When food is scarce, chicks of low mass are more likely to die than when food is ... BREEDING NUMBERS AND SUCCESS OF EUDYPTES PENGUINS AT MARION ISLAND, AND THE INFLUENCE OF MASS AND TIME OF ... ARRIVAL OF ADULTS R.J.M. Crawford and B.M. Dyer Marine and Coastal Management Department of ... L.G. Underhill Avian Demography Unit Department of Statistical Sciences University of Cape Town ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 175–190 : Autor(es): Crawford, R.J.M., B.M. Dyer, J. Cooper and L.G. Underhill