Resultados de la búsqueda
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Book review – Biogeographic Atlas of the Southern Ocean
Paper Title: Book review – Biogeographic Atlas of the Southern Ocean Abstract / Description ... -Coudert (Eds). 2014. Biogeographic Atlas of the Southern Ocean. Scientific Committee on Antarctic Research ... literature since the beginning of Antarc tic exploration to the present, museum collections, the Census of ... by the Scientific Committee on Antarctic Research, Scott Polar Research Institute, Lensfield Road ... , Cambridge, CB2 1ER, United Kingdom (www.scar.org). Over the past few decades the field of biogeo graphy ... in geographic space and geological time on a global scale. The Southern Ocean is still a vast ...
Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 45-46 : Autor(es): Reid, K.
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Size and density of krill layers fished by a Japanese trawler in the waters north of Livingston Island in January 1988
Paper Title: Size and density of krill layers fished by a Japanese trawler in the waters north of ... Livingston Island in January 1988 Abstract / Description: The size and density of fishable krill layers in ... the northern waters of Livingston Island were determined during the co-operative survey carried out by ... RV Kaiyo Maru and a Japanese trawler. The mean values of layer length, thickness and surface density ... during which a layer did not end. The density thus calculated ranged from 1.43 to 52.07 g/m3 with a mean ... 1.1 to 23.0 tonnes during the co-operative survey. After the co-operative survey with the trawler ... BY A JAPANESE TRAWLER IN THE WATERS NORTH OF L1VINGSTON ISLAND IN JANUARY 1988 Y. Endo and Y ... . Shimadzu Abstract The size and density of fishable krill layers in the northern waters of Livingston ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 339–345 : Autor(es): Endo, Y. and Y. Shimadzu
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Sensitivity investigation of the SDWBA Antarctic krill target strength model to fatness, material contrast and orientation
Paper Title: Sensitivity investigation of the SDWBA Antarctic krill target strength model to ... fatness, material contrast and orientation Abstract / Description: The distorted-wave Born approximation ... model is recognised as state-of-the-art in predicting acoustic target strength (TS) from fluid-like ... marine organisms. A stochastic version, the so-called SDWBA model, is endorsed by CCAMLR to predict the ... = 4.981 × 10–4 L + 1.009. At the end of the multiple runs a database was established to explore the ... rigorously if the scattering as a function of size and frequency for an individual (i.e. target strength ... modelled (Foote, 1991). In the case of zooplankton, due to the complexity of the scatter- ing processes ... , the acoustical estimates rely on the best aspects of both approaches. In recent decades, large ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 97–122 : Autor(es): Calise, L. and G. Skaret
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Age–length composition of mackerel icefish (Champsocephalus gunnari, Perciformes, Notothenioidei, Channichthyidae) from different parts of the South Georgia shelf
, Notothenioidei, Channichthyidae) from different parts of the South Georgia shelf Abstract / Description ... determine the age-length composition of mackerel icefish (Champsocephalus gunnari) from different parts of ... the South Georgia area. An analysis of the spatial distribution of C. gunnari size and age groups over ... the eastern, northern, western and southern parts of the shelf, and near Shag Rocks, revealed a ... (between 15 and 20%) and V1 - spent (end of spawning). The shelf area was divided into five regions ... the species. Fishing effort usually decreased for a short period (1-2 years) after which it again ... carried out several years after the ban on fishing was introduced (1997-2000) gave similar results. The ... appearance of the highly productive 1971 cohort after the sharp decrease in the N. sossii stock. The ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 133–146 : Autor(es): Frolkina, G.A
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Distribution and size–age composition of Antarctic krill (Euphausia superba) in the South Orkney Islands region (CCAMLR Subarea 48.2).
Paper Title: Distribution and size–age composition of Antarctic krill (Euphausia superba) in the ... South Orkney Islands region (CCAMLR Subarea 48.2). Abstract / Description: The distribution, size–age ... composition and biological condition of Antarctic krill (Euphausia superba) caught by the Russian krill ... trawler FV Maxim Starostin in Subarea 48.2 between January and March in 2009 and 2010 are described. The ... stage IV constituted about 50% of all krill in the catches. By the end of January, the proportion of ... 50% in January to 4.5% by the end of March. Discussion The high interannual variability in krill ... finish spawn- ing at the end of summer near the South Orkney Islands. Thorough analysis of the cause and ... study suggest that age 2+ krill probably influx into the South Orkney Islands region after spawning ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 123–134 : Autor(es): Sologub, D.O. and A.V. Remeslo
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Biological parameters for icefish (Chionobathyscus dewitti) in the Ross Sea, Antarctica
Paper Title: Biological parameters for icefish (Chionobathyscus dewitti) in the Ross Sea ... during the 2005/06 fishing season. These observers were placed on board three longline vessels targeting ... Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea (CCAMLR Subareas 88.1 and 88.2). Biological data ... , meristics, reproductive biology, diet and age estimation. All of the icefish sampled were identified as ... zone to the date when the ith fish was captured. Hence, ti,1 = ti, end first opaque zone – ti ... , spawning date ti,2 = (ni + w) – 1 ti,3 = ti, capture – ti, end last opaque zone (4) where ni = the total ... after the date when opaque zones are assumed to be completed; w = –1 if the recorded margin state ... - reader comparison test after Campaña et al. (1995). A sample of 114 otoliths was selected from the set ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 139–165 : Autor(es): Sutton, C.P., M.J. Manning, D.W. Stevens and P.M. Marriott
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Estimation of effective sample size for catch-at-age and catch-at-length data using simulated data from the Dirichlet-multinomial distribution
simulated data from the Dirichlet-multinomial distribution Abstract / Description: The incorporation of ... ‘effective sample size’ (ESS) in integrated assessments is an approximate but simple way of modelling the ... heterogeneity within fishing year was simulated using samples from the Dirichlet-multinomial (D-M) distribution ... its variants. One of the methods is based on the lack-of-fit of predictions of class probabilities ... (glm) examined is that of estimating yn′ in the above way after fitting this sim- ple linear ... residual mean deviance, then the ESS adjusted for process error, after removing SLOF, is given by ˆˆ ˆ ... beginning of the initialisation period. For Model 5, the simulation was the same as Model 1 for the ... thE dirichlEt-multinomial distribution S.G. Candy Department of the Environment, Water, Heritage ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 115–138 : Autor(es): Candy, S.G
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Management and assessment options for the crab fishery around South Georgia
Paper Title: Management and assessment options for the crab fishery around South Georgia Abstract ... / Description: A new fishery for the lithodid crab, Paralomis spinosissima, started in Subarea 48.3 in 1992 ... . The fishery is also new to CCAMLR, both in terms of the species and fishing gear. We provide an ... overview of the management options for crab fisheries in general and then consider these options in the ... closed before the nominal end-of-season, either when the quota is reached or for other biological ... miles of the continental shelf, from 22" to 27"s and between 500 and 700 m, at the lower end of the ... essential because of the size and heterogeneous nature of the terrain. Only after investigation of data at ... ASSESSMENT OPTIONS FOR THE CRAB FISHERY AROUND SOUTH GEORGIA M. Basson Renewable Resources Assessment ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 193–202 : Autor(es): Basson, M. and D.D. Hoggarth
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A comparison between otoliths and scales for use in estimating the age of Dissostichus eleginoides from South Georgia
Paper Title: A comparison between otoliths and scales for use in estimating the age of ... understanding the population dynamics and productivity of a fish stock. The use of scales to estimate age can ... whose age has been estimated using both scales and otoliths. We estimated the age of D. eleginoides ... ; for otoliths, we used transverse sections prepared by baking and grinding the posterior and anterior ... that the oldest age was 23 years. Large numbers of fish in unexploited populations survived after ... as one year if the fish was taken after 1 July but not before. Scales Typically, annuli on ... easily identified when bisectilig the radii. Cornpressed circuli marking the end of the first annulus ... BETWEEN OTOLITHS AND SCALES FOR USE IN ESTIMATING THE AGE OF DISSOSTICHUS ELEGINOlDES FROM SOUTH ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 75–92 : Autor(es): Ashford, J.R., S. Wischniowski, C. Jones, S. Bobko and I. Everson
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Low genetic diversity in the Antarctic toothfish (Dissostichus mawsoni) observed with mitochondrial and intron DNA markers
Paper Title: Low genetic diversity in the Antarctic toothfish (Dissostichus mawsoni) observed ... digests of nine sub-regions of the mitochondrial genome. Polymorphisms were found in four of seven introns ... digested with the restriction enzymes, but there was no population differentiation among the three sea ... areas. Direct sequencing of cytochrome b (665 bp) and the left domain of the control region (639 bp ... A ~0.7 kb fragment including the 3’ end of the cytochrome b gene, tRNA-Thr, tRNA-Pro, and a 5 ... the 13 recaptures, there was one long-distance movement, almost 800 km north (72°S) after 3.3 years ... . 12 (2005): 43–51 43 LOW GENETIC DIVERSITY IN THE ANTARCTIC TOOTHFISH (DISSOSTICHUS MAWSONI ... detected with restriction enzyme digests of nine sub-regions of the mitochondrial genome. Polymorphisms ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 43–51 : Autor(es): Smith, P.J. and P.M. Gaffney