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Investigation of bias in the mark–recapture estimate of toothfish population size at South Georgia
Paper Title: Investigation of bias in the mark–recapture estimate of toothfish population size at ... releases and recapture effort at South Georgia is likely to lead to an underestimate of the true population ... South Georgia Abstract / Description: This paper investigates the influence of mixing of fish, and the ... uneven distribution of tag placements and recapture effort, on bias in the Petersen estimator of ... InvestIgatIon of bIas In the mark–recapture estImate of toothfIsh populatIon sIze at south georgIa D.J. Agnew ... Subarea 48.3, it is concluded that the particular distribution of tag releases and recapture effort at ... rates of tagged toothfish at South Georgia are almost certainly relatively low because, in common with ... depending on the trend of the 1 000 m contour at that position around South Georgia or Shag Rocks. The ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 47–63 : Автор(ы): Agnew, D.J., G.P. Kirkwood, J. Pearce and J. Clark
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Analysis of the diet of Champsocephalus gunnari at South Georgia in late summer from 1994 to 1997, Dr Eduardo L. Holmberg surveys
Paper Title: Analysis of the diet of Champsocephalus gunnari at South Georgia in late summer from ... 1994 to 1997, Dr Eduardo L. Holmberg surveys Abstract / Description: The diet composition of the ... was analysed using frequency of occurrence (F%) and dietary coefficient (Q%) methods. Krill (Euphausia ... Georgia and Shag Rocks in the period investigated, except in 1994, when the order of importance of these ... DIET OF CHMPSOCEPHALUS GUNNARZ AT SOUTH GEORGIA IN LATE SUMMER FROM 1994 TO 1997, DR E D U R D O L ... of the 1980s and at lower The mackerel icefish (Charnpsocephalus gunnaui) levels up t o t he ... ., 1988; Kock et al., 1994a). Together with other Diet of C. gunnari at South Georgia Table 1 ... a sample size of 25 ensures CVs of at least 10%. We established a maximum n of 50, which yields ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 103–123 : Автор(ы): Barrera-Oro, E., R. Casaux and E. Marschoff
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A von Bertalanffy growth model for toothfish at Heard Island fitted to length-at-age data and compared to observed growth from mark–recapture studies
’ selection at 1 000 mm length down to 1% selection for a length of 1 600 mm. When length-bin sampling ... VB parameter estimates obtained from the length-at-age data and the Fabens (1965) form of the VB ... to give more realistic predictions of mean length-at-age for young fish. File: 03candy-etal.pdf ... Paper Title: A von Bertalanffy growth model for toothfish at Heard Island fitted to length-at-age ... of length-bin sampling on sampling probabilities. The VB curve fi tted to the length-at- age data ... sharp decline from ‘full’ selection at 1 000 mm length down to 1% selection for a length of 1 600 mm ... and precise estimation of popula- tion-average length-at-age is important for the assessment of fi sh ... length-at-age and the coeffi cient of population variation about the mean. Therefore, prediction of ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 43–66 : Автор(ы): Candy, S.G., A.J. Constable, T. Lamb and R. Williams
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Low breeding success of the Adélie penguin at Béchervaise Island in the 1998/99 season
Paper Title: Low breeding success of the Adélie penguin at Béchervaise Island in the 1998/99 ... (Pygoscelis adeliae) at Béchervaise Island during 1998/99, a season of low breeding success. Fifty-six ... , foraging trip duration and diet suggests that the death of chicks during the guard stage was due to an ... inadequate rate of food supply. In most previous seasons adults have foraged both at the continental shelf ... penguins were substantial during this time, they were maintained at the expense of longer foraging trip ... SUCCESS OF THE ADELIE PENGUIN AT BECHERVAISE ISLAND IN THE 1998199 SEASON L.G. Irvine, J.R. Clarke and ... Abstract This paper describes the diet and foraging behaviour of Adelie penguins (Pygoscelis adeliae) at ... 0.69 to 1.06 chicks crPched per nest. Evidence from analyses of foraging location, foraging trip ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 151–167 : Автор(ы): Irvine, L.G., J.R. Clarke and K.R. Kerry
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Reproductive performance of seabirds and seals at South Georgia and Signy Island, South Orkney Islands, 1976-1987: implications for Southern Ocean monitoring studies
Paper Title: Reproductive performance of seabirds and seals at South Georgia and Signy Island ... some or all of breeding population size, breeding success, foraging trip duration and offspring growth ... fluctuations in reproductive performance of the krill-eating, summer-breeding penguins at Signy Island are not ... / Description: Aspects of the reproductive performance over the last decade of black-browed, grey-headed and ... ) REPRODUCTIVE PERFORMANCE OF SEABIRDS AND SEALS AT SOUTH GEORGIA AND SIGNY ISLAND, SOUTH ORKNEY ISLANDS, 1976 ... success, foraging trip duration and offspring growth rate. 1977-78 and 1983-84 were summers of ... and P. Rotheryl (United Kingdom) Abstract Aspects of the reproductive performance over the last ... decade of Black-browed, Grey-headed and Wandering Albatrosses, Gentoo and Macaroni Penguins and ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 445-447 : Автор(ы): Croxall, J.P., T.S. McCann, P.A. Prince and P. Rothery
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Long-term trends in the foraging patterns of female Antarctic fur seals at South Georgia
Paper Title: Long-term trends in the foraging patterns of female Antarctic fur seals at South ... utilizing tetracycline-marked teeth confirmed that the feeding trip/suckling cycles of females are reflected ... Georgia Abstract / Description: The number of feeding trips to sea made by female Antarctic fur seals ... during lactation may reflect the relative availability of local prey resources. Experimental work ... -TERM TRENDS IN THE FORAGING PATTERNS OF FEMALE ANTARCTIC FUR SE!\LS AT SOUTH GEORGIA* 1 J.L ... tetracycline-marked teeth confirmed that the feeding trip/suckling cycles of females are reflected as ... . Bengtson (USA) Abstract The number of feeding trips to sea made by female Antarctic fur seals during ... lactation may reflect the relative availability of local prey resources. Experimental work utilizing ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 441-443 : Автор(ы): Bengtson, J.L.
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The foraging range of Adélie penguins at Béchervaise Island, Mac. Robertson Land, Antarctica, and its overlap with the krill fishery
Paper Title: The foraging range of Adélie penguins at Béchervaise Island, Mac. Robertson Land ... foraging range of the birds at Béchervaise Island considerably exceeds the 15 to 50 km determined for birds ... , Antarctica, and its overlap with the krill fishery Abstract / Description: The foraging ranges of six female ... and four male Adélie penguins breeding at Béchervaise Island near Mawson Station (Mac. Robertson Land ... WG-CEMP-92/36 THE FORAGING RANGE OF ADELIE PENGUINS AT ... foraging range of the birds at Bechervaise Island considerably exceeds the 15 to 50 km determined for ... of the continental shelf at approximately the same speed (1 km/hr) as the prevailing currents. All ... considerable concentrations at the shelf break along the coast of Mac. Robertson Land (Higginbottom et al ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 337–344 : Автор(ы): Kerry, K.R., J.R. Clarke and G.D. Else
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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 ... correlation coefficients were 0.951 for males and 0.898 for females, both of which were significant at the 1 ... , is normal in one area but low in the other. There are also some instances of low C, at both South ... success. Year ct FUSE CEPE MAPE Nov Dec Jan Feb Mar Trip Surv Meal S Meal S Comparison of Condition ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 119–132 : Автор(ы): Everson, I. and K.-H. Kock
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Age, growth and size at sexual maturity of Macrourus carinatus caught as by-catch in Australian sub-Antarctic trawl fisheries
Paper Title: Age, growth and size at sexual maturity of Macrourus carinatus caught as by-catch in ... Australian sub-Antarctic trawl fisheries Abstract / Description: Estimates of age and growth were obtained ... McDonald Islands (Division 58.5.2) in 1992 and 1993. The range of estimated ages was 4 to 25 years. There ... growth parameters for both sexes combined were: L ∞ = 690 mm, K = 0.069 and t 0 =-2.4. The size at sexual ... . 10 (2003): 139–151 139 AGE, GROWTH AND SIZE AT SEXUAL MATURITY OF MACROURUS CARINATUS CAUGHT AS ... sexes combined were: L∞ = 690 mm, K = 0.069 and t0 = -2.4. The size at sexual maturity of M ... Age, growth and size at sexual maturity of M. carinatus Specimens were binned into 50 mm size classes ... values of L50 and Lm50 estimated. L50 is defi ned as the length at which 50% of the fi sh population ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 139–151 : Автор(ы): van Wijk, E.M., R. Williams and A.J. Constable
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The biology, ecology and development of fishery management advice for the anomuran crabs at South Georgia (CCAMLR Subarea 48.3)
available information on the biology and ecology of the lithodids at South Georgia and provides an overview ... gaps in our knowledge of the biology, ecology and demography of the lithodid species at South Georgia ... Paper Title: The biology, ecology and development of fishery management advice for the anomuran ... crabs at South Georgia (CCAMLR Subarea 48.3) Abstract / Description: This review summarises the ... available information on the biology and ecology of the lithodids at South Georgia and provides an overview ... . Considerable gaps in our knowledge of the biology, ecology and demography of the lithodid species at South ... of data relating to lithodid crab biology and ecology at South Georgia has been obtained from a ... summarises the available infor- mation relating to the biology and ecology of the lithodids at South Georgia ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 1–15 : Автор(ы): Belchier, M., T. Peatman and J. Brown
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