Search results
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Joinville–D’Urville Islands (Subarea 48.1) – a former fishing ground for the spiny icefish (Chaenodraco wilsoni), at the tip of the Antarctic Peninsula – revisited
restricted to the two seasons (1978/79 and 1979/80) when Polish and GDR vessels fished in the area. Length ... was, however, sparse, being restricted to the two seasons (1978/79 and 1979/80) when Polish and GDR vessels ... Expedition ANT XIX/3 by RV Polarstern in February 2002. Five hauls were conducted north of the two islands ... of the Antarctic Expedition ANT XIX/3 by RV Polarstern in February 2002. Five hauls were conducted north of the two ... et al. 10 After hatching, larvae, postlarvae and juveniles of C. wilsoni spent one or two years ... , pers. comm., 1980). Exploratory fi shing by a GDR trawler was also conducted on one or two days ... 3 and 4, with very few 2- and 5-year-old fi sh present (n = 163) (Cielniaszek, 1981). Ageing, however ... sh reached 4 years of age they moved to the east again. They fi rst spawned when 4–5 years old ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 1–20 : Author(s): Kock, K.-H., L. Pshenichnov, C.D. Jones, K. Shust, K.E. Skora and Zh.A. Frolkina
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Changes in the fish biomass around Elephant Island (Subarea 48.1) from 1976 to 1996
from 1978/79 to 1988/89, with most of the commercial harvesting taking place in the first two years ... /89, with most of the commercial harvesting taking place in the first two years of the fishery ... compositions obtained in the 1980s. The Antarctic Peninsula region was closed for finfishing from 1989/90 ... compositions obtained in the 1980s. The Antarctic Peninsula region was closed for finfishing from 1989/90 ... composition for 1987 was considerably skewed by a single large catch of about 37 000 one-year-old fish (11 ... cm long (Figure 3 ) and up to 15 age classes were present in the stock (Kock, 1991 -Figure 30 ... 5 and 6 were the predominant age classes in the stock (Kock, 1991 - Figure 30). After this, the proportion ... in distribution, with more than one or two individuals being only rarely present in a Kock haul ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 165–189 : Author(s): Kock, K.-H
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Moulting interval and growth of juvenile Antarctic krill fed different concentrations of the diatom Phaenodactylum tricornutum in the laboratory
day –1, which is too slow to support the hypothesised 2-year life-span of this animal in the field ... krill was calculated to be 0.047 mm day–1, which is too slow to support the hypothesised 2-year ... life-span of this animal in the field. Growth conditions of krill in the Southern Ocean are discussed ... to support the hypothesised 2-year life-span of this animal in the field. Growth conditions of krill ... demasiado lenta para mantener la duracion de vlda de dos anos postulada para este animal en la region. Se ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 223-225 : Author(s): Ikeda, T. and P.G. Thomas
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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
parameters. A young-age adjustment (less than 5 years old) to the VB model is also given in order to give ... obtained using IWLS-estimated parameters. A young-age adjustment (less than 5 years old) to the VB model ... Paper Title: 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 Abstract / Description: Length-at-age ... than 20 years in age. This is due to the combined effect of natural and fi shing mor- tality ... for ages in the 8– 20 year range. This translated to larger predictions for the MLPLB-fi tted curve ... with those obtained using IWLS-estimated parameters. A young-age adjustment (less than 5 years old ... )|A) = μ(A, θ) = L∞ (1 – exp{–κ(A – t0)}) (2) and L(Pop) = μ(A, θ) + ε where L is length (mm), A is age (years ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 43–66 : Author(s): Candy, S.G., A.J. Constable, T. Lamb and R. Williams
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Integration of CPUE data into assessments using the Generalised Yield Model
/ Description: For the last three years, CCAMLR039;s Working Group on Fish Stock Assessment (WG-FSA) has ... For the last three years, CCAMLR's Working Group on Fish Stock Assessment (WG-FSA) has accorded ... . Recruitme~~ts in future years and in determining the age composition of the population at the beginning ... ). 111 summary, the GYM is a general age-str~~ctured fish stock projection model for assessing the long ... of differential equatioi~s that incorporate functions that specify growth, mortality, age-dependent selectivity ... , projections include the time series of survey estimates of recruitment of age 4 fish into the population ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 65–74 : Author(s): Kirkwood, G.P. and A.J. Constable
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Trends in population size and breeding success at colonies of macaroni and rockhopper penguins, Marion Island, 1979/80–1995/96
success and chick survival of rockhopper penguins were significantly correlated in only one of the three ... penguins were significantly correlated in only one of the three inter-colony comparisons. The greater ... and rockhopper penguins, Marion Island, 1979/80–1995/96 Abstract / Description: At sub-Antarctic Marion Island ... , annual breeding success of macaroni (Eudyptes chrysolophus) between 1979/80 and 1995/96 and rockhopper ... in only one of the three inter-colony comparisons. The greater coherence in the performance of macaroni ... 0 5 0 5 a n W '\ W \ \ C] \ W k 0 3 I \ \ (I) \, r \ \ Y \ 2 E V \ I 'L 0 \ \ 0 1 \ 1 1 - - 1 - -- -A i --l _ l p - l p l 79/80 81/82 83/84 85/86 87/88 89/90 91/92 93/94 95/96 Figure 6: Trends in the numbers of macaroni ... success of macaroni (Et~dyptes cl~rysoloplztis) between 1979/80 and 1995/96 and rockhopper penguins ... investigated decreased in size over the study period, while the other two remained stable. The only ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 89–103 : Author(s): Cooper, J., A.C. Wolfaardt and R.J.M. Crawford
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An assessment of the impact of krill fishery on penguins in the South Shetlands
catch rate (≤10 x 10 3 tonnes/1O-day period) is smaller by one or more orders of magnitude within ... ), the present catch rate (≤10 x 103 tonnes/1O-day period) is smaller by one or more orders of magnitude ... ) fishery and penguins during the penguins039; breeding season (December to March) in the South Shetland ... (≥200 x 10 3 tonnes) and its variability (the order of 100 x 10 3 tonnes/10-20-day period), the present ... tonnes/lO-day period) is smaller by one or more orders of magnitude within the localised areas. Thus ... impact fgcheux sur la biomasse du krill local et de ce fait sur les manchots, si l'on prend egalement en ... over a period of approximately Impact of the Krill Fishery on Penguins in the South Shetlands one ... , the present catch rate (S10 X 103 tonnes/lO-day period) is smaller by one or more orders of magnitude ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 107–128 : Author(s): Ichii, T., M. Naganobu and T. Ogishima
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Target strength studies on Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea
: TS 38 = 36.83Log TL(cm) –103.62 (N = 18); TS 120 = 34.75Log TL(cm) –84.20 (N = 19); TS 200 = 26.71Log ... of the continental slope and shelf of the Ross Sea at depths from 30 to 120 m, during the Italian expeditions of 1997 ... TL(cm) –103.62 (N = 18); TS120 = 34.75Log TL(cm) –84.20 (N = 19); TS200 = 26.71Log TL(cm ... and shelf of the Ross Sea at depths from 30 to 120 m, during the Italian expeditions of 1997/98, 2000 ... –48 mm; age: second year), coinciding with an increase in lipid content in the specific ventral sacs ... aver- aged from 0 to 200 m depth during the nine hauls were: T = – 0.74° ± 0.37°C; S = 34.20 ± 0.12 ... , medium and large fish used in one-fish trials are indicated in bold. (a) May 2007 experiment: 40 ... at 10 m from the transducers. In 2007, one trial was performed on each length class. In 2009, each ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 75–104 : Author(s): Azzali, M., I. Leonori, I. Biagiotti, A. De Felice, M. Angiolillo, M. Bottaro and M. Vacchi
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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 ... : Age, growth and age/length composition of populations of grey rockcod (Notothenia (Lepidonotothen ... g at the banks and 153 to 188 g in the Kerguelen Island area were recorded for fish at age 6 to 12. Growth ... parameters were calculated according to Bertalanffy’s equation. The dynamics of age/length composition ... of its theoretical maximum length and one-third of its maximum body weight at the age of 9 years ... with the fairly constant mean age of the population over the last two years, the proportion of fish with a mode ... of different age. 132 2500 2000 0> 1500 'I 'I 'I 1000 500 fO 20 30 Y Y 'I 40 ... age data. This species is characterized by a long life cycle; 15 year old specimens were recorded ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 123–139 : Author(s): Zaitsev, A.K.
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Trends in relative abundance of fjord Notothenia rossii, Gobionotothen gibberifrons and Notothenia coriiceps at Potter Cove, South Shetland Islands, after commercial fishing in the area
to the inshore sub-populations of N. rossii and G. gibberifrons over the last 16 years was most probably caused ... -populations of N. rossii and G. gibberifrons over the last 16 years was most probably caused by the offshore ... : and a bandwidth of 0.15 which yields an effective bandwidth of approximately one year. Barrera-Oro et al ... ). This probably reflects the high availability of these two species at a site which is far away from the main ... cette region a la fin des annees 70. Cette interpretation concorde avec les informations que l'on ... . ~ ~ T J I ~ H A C K H X 0-BOB - AHT~PKTHY~CKO~O 11-OBa 323 3TH 10 neT. Co~pa~eHHe IlOIlOnHeHHrl Ilpk16pe~~blx cy6nonynsruktii ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 43–52 : Author(s): Barrera-Oro, E.R., E.R. Marschoff and R.J. Casaux