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On the presence of Paralomis spinosissima and Paralomis formosa in catches taken during the Spanish survey Antártida 8611
m. In the whole of the area surveyed, the two crab species of the genus Paralomis (P. spinosissima and P. formosa ... of the 29 made around Shag Rocks and in 20 of the 104 hauls made at South Georgia. P. formosa was caught ... m and that of P. formosa, far less frequent in the catches, from 320 to 350 m. Field observations showed that these two ... . were found, together with the qualitative composition of the fish fauna usually accompanying them ... . P. formosa was only present in two hauls (once in each archipelago), in one of which it appeared together ... m down to 643 m. In the whole of the area surveyed, the two crab species of the genus Paralomis ... in seven hauls of the 29 made around Shag Rocks and in 20 of the 104 hauls made at South Georgia ... observations showed that these two species were absent from the southern archipelagos of the Scotia Arc (South ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 165–173 : Author(s): López Abellán, L.J. and E. Balguerías
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A rationale for conservation areas within Antarctic waters
: The application of potential conservation measures listed in Article IX 2 of the Convention requires ... resources’ (Article IX 2 (b)). In order to select meaningful boundaries for such areas, first priority has ... The application of potential conservation measures listed in Article IX 2 of the Convention ... of Antarctic marine living resources’ (Article IX 2 (b)). In order to select meaningful boundaries ... KOHCYMeHToB. BKnIOLJan ycaThlx KHTOB. TIOneHeH 11 nI1HrBI1HOB. BhlABl1raeTCn npeAnOnO)l{eHHe ° B03MO)l{HOH ... of potential conservation measures listed in Article IX 2 of the Convention requires "the designation ... " (Article IX 2 (b)). In order to select meaningful boundaries for such areas, first priority has been ... potentielles enumerees a l'Article IX 2 de la Convention necessite "la designation de secteurs et de sous ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 513-535 : Author(s): Chittleborough, R.G.
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Estimation of natural mortality for the Patagonian toothfish at Heard and McDonald Islands using catch-at-age and aged mark-recapture data from the main trawl ground
proportions-at-length and fishery- and year-specific age–length keys (ALKs) for years 1998 to 2008. A large ... recapture numbers by age class. Two alternative estimation models were programmed in R, based on alternative ... ordinary differential equations (ODE) for within-year population dynamics. These are the BODE model ... numbers-at-age. The properties of these two models for estimation of M have been studied using simulation ... ity , S 'a Age (years) ¢ a S 0.05 0.10 0.15 0.20 0.25 0.30 -5 30 0 -5 25 0 -5 20 0 -5 15 ... - ing to and from the fishery and unloading/refuel- ling, two values of the proportion of the year ... \Communications\CCAMLR%20Science\Journal%202011\final%20papers\Candy%20et%20al\tr-ch%20for%20author\www.R ... et%20al\tr-ch%20for%20author\www.R-project.org 37 Estimation of M for D. eleginoides at HIMI Ta bl ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 29–45 : Author(s): Candy, S.G., D.C. Welsford, T. Lamb, J.J. Verdouw and J.J. Hutchins
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A first step towards modelling the krill–predator dynamics of the Antarctic ecosystem
to the hypothesis of a krill surplus in the mid-20th century is described, and the information on population ... including krill, four baleen whale (blue, fin, humpback and minke) and two seal (Antarctic fur and crabeater ... , together with suggested further areas for investigation. Amongst the key inferences of the study ... surplus in the mid-20th century is described, and the information on population and trend levels that has ... of this species declined substantially over the first 20 years of the fishery, from 1970 to 1990 (Kock, 1992 ... (about 5% per year) in minke whale recruitment dur- ing the period from about 1940 to 1965. Two sets ... . Incorporating regional effects The model developed divides the Antarctic into two regions: one is the Atlantic ... , and the other the Pacific Ocean sector, which corresponds to the Areas V, VI and I. The two regions, together ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 217–277 : Author(s): Mori, M. and D.S. Butterworth
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Revised age and growth estimates for Antarctic starry skate (Amblyraja georgiana) from the Ross Sea
generated that suggest much slower growth, greater ages-at-maturity (about 20 years compared with 6–11 years ... growth, greater ages-at-maturity (about 20 years compared with 6–11 years) and greater maximum ages ... georgiana in the Ross Sea suggested that these skates initially grow very rapidly for about five years ... ) and greater maximum ages (28–37 years compared with 14 years). Several pieces of circumstantial evidence ... large discrepancies between the two readers. 10 20 30 R ea de r 2 , r ea di ng 4 (m ea ... 1 1 2 1 2 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 3 1 1 2 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 2 1 1 2 1 1 1 1 1 2 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 N = 96 Reader 1, reading 1 (years) 0 10 20 30 40 R ea de r 1 , r ea di ng 2 (y ea rs ) ( m ea ... bands, growth curves have been generated that suggest Estimated age (years) 0 10 20 30 40 P el vi ... because it fits the data better, and because reader 2 underestimated Estimated age (years) 0 10 20 30 ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 211–220 : Author(s): Francis, M.P. and M.J. Gallagher
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An assessment of toothfish in Subarea 48.3 using CASAL
, lasted from 1 May to 31 August. The remainder of the year (1 September to 30 November) constituted ... that there was a change in selectivities-at-age between 1997 and 1998. Accord- ingly, two ‘fleets’ were identified: one ... 1998 onwards. It should be noted that one implication of having two fleets is that the standardised ... CPUE data have also to be considered as applying to the different fleets in the two sets of years ... Paper Title: An assessment of toothfish in Subarea 48.3 using CASAL Abstract / Description: This ... paper presents an assessment of the stock of toothfish around South Georgia (Subarea 48.3) using the ... dynamics is explored using Markov Chain Monte Carlo (MCMC) methods; methods for fast approximations to the ... , long-term yield calculations were undertaken, given the CCAMLR decision rules, for five main assessment ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 65–95 : Author(s): Hillary, R.M., G.P. Kirkwood and D.J. Agnew
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Possible effects of different levels of krill fishing on predators – some initial modelling attempts
together with preliminary information on adult survival and breeding success patterns for certain krill ... predator species. A 'one-way' interaction model is developed, in which krill abundance ... for management recommendations. A mathematical framework for a 'two-way' interaction model (including ... on this approach are deferred pending further development of the 'one-way' analyses. File: 06butterworth ... maturity plus a gestation period of essentially one year), while for birds it is the age at first laying ... in each case: y = 0 and two other values, one of which corresponds roughly to depletion of predator ... , by considering a krill dynamics model incorporating recruitment fluctuations together with preliminary ... information on adult survival and breeding siuccess patterns for certain krill predator species. A 'one-way ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 79–97 : Author(s): Butterworth, D.S. and R.B. Thomson
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Estimating the impact of depredation by killer whales and sperm whales on longline fishing for toothfish (Dissostichus eleginoides) around South Georgia
1 and 4 animals, and have a relatively lower impact on catches, depressing CPUE by up to 20%. Sperm whales have ... to 20%. Sperm whales have been more frequently encountered in recent years, occurring in larger pod ... on 3.8% and sperm whales on 17.7% of lines. Killer whales appear in pod sizes normally of 4 to 10 animals ... been more frequently encountered in recent years, occurring in larger pod sizes, whereas killer whale ... that during the 2004/05 season two fish were being taken for every one hauled. This is not taken ... of animals. This was undertaken for each of the years 2003 to 2009; the proportionate decline in CPUE ... of increasing interactions between sperm whales and the fish- ery over the years 2003 to 2006, followed by two ... 9 4 67 1 4 67 1 20 05 3. 4% 5. 1% 8. 1% 3 05 7 3 16 0 3 21 3 3 30 3 20 ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 163–178 : Author(s): Moir Clark, J. and D.J. Agnew
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Surveys of breeding penguins and other seabirds in the South Shetland Islands, Antarctica, January-February 1987*
to have been about 40% overall increase in the chinstrap population in the last 20-30 years, about three ... in the chinstrap population in the last 20-30 years, about three-fourths of the difference between our counts ... -fourths of the difference between our counts and previous ones is due to more complete coverage ... Memorandum NMFS Antarctic Marine Living Resources Program (AMLR)) File: 20-Shuford-and-Spear.pdf ... -30 years, about three-fourths of the difference between our counts and previous ones is due to more ... a jugula ire ait augmente globalement d'a peu pres 40% au cours des dernieres 20-30 annees, environ les ... 20-30 anos, aproximadamente tres cuartas partes de la diferencia entre nuestros recuentos y los ... rro rrpeAblAYlI\l1M OlleHKaM. XOTH, KaK Ka)KeTCH, 3a rrOCJIeAHl1e 20-30 JIeT o611\ee KOJII1QeCTBO ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 449-451 : Author(s): Shuford, W.D. and L.B. Spear
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Preliminary atlas of Balaenopterid whale distribution in the Southern Ocean based on pelagic catch data
the locations of pelagic catches of Balaenopterid whales by month between 1931/32–1979/80. Two sets of maps were ... produced. The first series contains 24 maps of catches by species by month, and the second consists of 30 ... , plus three summary maps of fin whales catches for the years 1952/53–1961/62 combined, for each ... of Balaenopterid whales by month between 1931/32–1979/80. Two sets of maps were produced. The first series ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 113-193 : Author(s): Mizroch, S.A. et. al