Search results
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Length-based assessment for mackerel icefish (Champsocephalus gunnari) at South Georgia
respectively. Résumé La méthode employée actuellement par la CCAMLR pour l'évaluation du poisson des glaces ... (Champsocephalus gunnari) dans la sous-zone 48.3 repose sur le programme d'analyse mixte de la CCAMLR (CMIX) et ... nombre selon l'âge et le projette en fonction de la règle de contrôle de l'exploitation, pour fixer une ... reposant sur la longueur qui élimine le problème de la détermination de la cohorte. Une technique de ... (Champsocephalus gunnari) in Subarea 48.3 employs the CCAMLR mixture analysis program (CMIX) and generalised yield ... accurate identification of age cohorts from the survey data. In this paper a length-based approach is ... data which, in conjunction with the bootstrapped survey biomass data, yields an estimate of the ... showed very good agreement in calculated yields for 2006, 2007 and 2009, and some differences for 2008 ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 129–137 : Author(s): Hillary, R.M., C.T.T. Edwards, R.E. Mitchell and D.J. Agnew
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Data on krill (Euphausia superba Dana) consumption by coastal fishes in Division 58.4.2 (Kosmonavtov and Sodruzhestva Seas)
kriU n'a ete evaluee que pour rete (de decembre it avril). D'apres les evaluations, si la biomasse ... la production annueUe de krill. Pe3lOMe HMelO~Mec~ ~o HaCTo~~ero BpeMeHM o~eHKM nOTpe6~eHM ... Atlantico que han sido extrapolados sobre toda la Antartida. De acuerdo con estos ca1culos, la cantidad ... ). Las evaluaciones obtenidas indican que si la biomasa total de peces es de 551 300 toneladas, los ... Paper Title: Data on krill (Euphausia superba Dana) consumption by coastal fishes in Division ... ; Miller et al., 1985). Assessments contained in this paper are based on results of research conducted in ... trawl and acoustic surveys as well as on fish feeding patterns and krill production were used in the ... taking into account their distribution in the particular study area of Antarctica. Total fish stock was ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 305–319 : Author(s): Pakhomov, Y.A., V.A. Bibik and V.V. Gerasimchuk
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Is the attempt to estimate the biomass of Antarctic fish from a multi-species survey appropriate for all targeted species? Notothenia rossii in the Atlantic Ocean sector – revisited
le cas de N. rossii, dont la distribution est non aléatoire, au point qu’une grande proportion de la ... 8604 La Jolla Shores Drive, La Jolla, CA 92037, USA Abstract Notothenia rossii was the fi rst target ... intensive au début des années 1970. La fermeture de la pêche de cette espèce en 1985 faisait partie des ... premières mesures de conservation adoptées par la CCAMLR. En général, la biomasse de poisson dans une sous ... appropriate for all targeted species? Notothenia rossii in the Atlantic Ocean sector – revisited Abstract ... / Description: Notothenia rossii was the fi rst target species in Southern Ocean fi sheries. The species was ... already heavily fished at the beginning of the 1970s. The closure of the fishery for this species in 1985 ... violated in the case of N. rossii, which is non-randomly distributed such that a large proportion of the ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 141–153 : Author(s): Kock, K.-H., M. Belchier and C.D. Jones
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The gentoo penguin as a candidate species for the CCAMLR Ecosystem Monitoring Program
(ISR) du programme de contrOle de l'ecosysteme de la CCAMLR), nous amenent a suggerer (en presentant ... la bibliographie complete de la litterature de support) que le manchot papou repond aux criteres ... durante varios alios en la isla de los Pajaros, Georgia del Sur y en el aIchipielago de Shetlands del ... Sur (ambas localidades estan dentro de las Regiones de Estudio Integrados (ISRS)) del Programa de ... in the CEMP. The extensive dependence of this species in these ISRs on Euphausia superba, (including ... in winter), its residence in the ISRs in winter and its early attainment of sexual maturity are all ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 483–488 : Author(s): Croxall, J.P. and T.D. Williams
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Using ecosystem monitoring data to detect impacts
ecosistemas es indicar el estado de los mismos y si han sido afectados por actividades como la pesca. Este ... puede ser evaluada analíticamente, lo que facilita la toma de decisiones en base a la posición adoptada ... des valeurs situées en dessous d'un point de référence fixe. La seconde approche tient compte de ... important prolongé de la production de jeunes chez l'otarie de Kerguelen (Arctocephalus gazella) en ... an observed value in an unimpacted system, or (ii) the frequency of values below a fixed reference ... point. The second approach allows inference criteria based on changes in this frequency rather than by ... decline in Antarctic fur seal (Arctocephalus gazella) pup production at South Georgia from the early 1990s ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 197–212 : Author(s): Hill, S.L., J. Forcada, P.N. Trathan and C.M. Waluda
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Acoustic estimates of krill biomass in the Elephant Island area: 1981–1993
g/m2. Resume Estimations acoustiques de la biomasse du krill a proximite de l'ile Elephant pour les ... fondees sur des releves precedents ajustes en fonction de la definition recemment proposee de la reponse ... acoustique d u krill (Greene et al., 1991). Les estimations de la biomasse oscillent entre 267 X 103 ... tonnes (mars/avril 1985) et 4 880 X 103 tonnes (janvier 1993) et la densite de la biomasse entre 2,5 ... Paper Title: Acoustic estimates of krill biomass in the Elephant Island area: 1981–1993 Abstract ... / Description: Acoustic estimates of krill biomass in the vicinity of Elephant Island are presented for the ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 1–5 : Author(s): Hewitt, R.P. and D.A. Demer
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Status of the coastal stocks of Dissostichus spp. in East Antarctica (Divisions 58.4.1 and 58.4.2)
supposant que sa productivité et son état d’exploitation soient similaires à ceux de la mer de Ross, où le ... large de la côte de l’Antarctique de l’Est (30°E–150°E ; divisions OAA/CCAMLR 58.4.1 et 58.4.2) depuis ... condition préalable à la participation à la pêcherie et seules certaines unités de recherche à petite ... à la pêche. Cet article examine les résultats de cette expérience et explore plusieurs méthodes ... Paper Title: Status of the coastal stocks of Dissostichus spp. in East Antarctica (Divisions ... participation in the fishery, with only some Small-scale Research Units (SSRUs, consisting of 10° longitude ... there are two stocks in the area, one in Division 58.4.1 and one in Division 58.4.2, with the division ... tonnes per SSRU in the west (Division 58.4.2) and 1 000–1 700 tonnes per SSRU in the east (Division ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 71–100 : Author(s): Agnew, D.J., C. Edwards, R. Hillary, R. Mitchell and L.J. López Abellán
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Towards the development of a management plan for mackerel icefish (Champsocephalus gunnari) in Subarea 48.3
), que toma en cuenta las variaciones periodicas de las tasas de mortalidad natural, proporciona una ... La gestion du poisson des glaces (Chanipsocephalus guunnri) en Georgie du Sud est compliquee par ... peuvent @tre associees 21 l'accroissement de la consommation de C. gunnari par les otaries de Kerguelen ... les annkes ou le krill se fait rare. La mortalite naturelle de C. gunnari peut donc, certaines annees ... gunnari) in Subarea 48.3 Abstract / Description: Management of the mackerel icefish (Champsocephalus ... gunnari) at South Georgia is complicated by the likelihood of substantial periodic variations in natural ... mortality rates. These may be associated with increased consumption of C. gunnari by Antarctic fur seals in ... years of poor krill availability. Thus natural ortality of C. gunnari may, in some years, increase by a ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 63–77 : Author(s): Agnew, D.J., I. Everson, G.P. Kirkwood and G.B. Parkes
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A preliminary investigation of the possible effects of rhizocephalan parasitism on the management of the crab fishery around South Georgia
on this preliminary study are identified. Resume La population de crabes Paralomis spinosissima exploitee par une ... nouvelle pecherie autour de la Georgie du Sud (sous-zone 48.3) depuis 1992 manifeste des niveaux ... provoquer la sterilite des individus infestes. De ce fait, le parasitisme peut reduire la biomasse reelle ... du stock reproducteur, d'ou des implications evidentes sur la gestion des stocks. Les implications ... levels of infection by a rhizocephalan barnacle have been found in the population of the crab Paralomis ... to declines in spawning stock. The effects of harvesting both healthy and infected animals are ... animals from the population. The need is stronger when the population is sensitive to declines in spawning ... stock. Results highlight the importance of incorporating parasitism in the design of a management ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 175–192 : Author(s): Basson, M
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The choice of procedure for deciding when to close fisheries regulated by CCAMLR: a simulation model
sur les quatre demieres periodes de declaration; i1 ferme la peche si ces taux indiquent que le T AC ... methodes decrites dans les mesures de conservation de la CCAMLR, servant it detenniner la date de ... fenneture des pecheries contrOlees par le secretariat de la CCAMLR, sont difficiles it appliquer en raison ... de la variation des taux de captures des pecheries. L'historique des captures aleatoires ... simulation model Abstract / Description: The methods, described in CCAMLR Conservation Measures, used for ... implement because of the variation in catch rates shown by the fisheries. Non-fluctuating random and ... decisions is investigated under a variety of circumstances. The model described in the existing conservation ... reporting periods are small (five days) and the reporting delay is minimal. It is recommended that in future ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 81–97 : Author(s): Agnew, D.J.