Résultats de la recherche
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Krill population biology during the 1991 Chilean Antarctic krill fishery
/ Description: Population biology of Antarctic krill, Euphausia superba, was studied from samples taken in 1991 ... 419 hauls. In Area A, a unimodal size frequency distribution was found; the size range was between 30 ... spermatophore had a 36.5 mm TL, 80% of the females with spermatophores had a TL larger than 45 mm. In Area B, a ... in night-time catches while females are more abundant during daytime catches, thus showing a ... by INACH (Chilean Antarctic Institute). Resume Etude de la biologie des populations du krill ... 50 echantillons, puis analyses. Le lieu de peche etait divise en deux secteurs: la zone A, au nord ... des iles Shetland du Sud, et la zone B, au nord de l'ile Elephant. Les echantillons ont ete groupes ... la zone A, une distribution unimodale de frequences de tailles a ete obselVee; la TL variait de 30 a ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 223–235 : Auteur(s): Mujica R., A., E. Acuña S. and A. Rivera O.
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Note on estimating krill abundance from acoustic data on individual aggregations
est une breve description des equations et des hypotheses fondamentales, a la base de l'estimation de ... de l'echo- integration est superieure pour l'estimation de l'abondance regionale du kriIl et de sa ... describen brevemente las ecuaciones e hipotesis fundamentales en que se basa la estimacion de la abundancia ... diferencias mas notables de ambos enfoques. Se Uega a la conclusion de que, para estimar el kriU de una zona ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 219–223 : Auteur(s): Hampton, I. and D.G.M. Miller
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Modelling krill recruitment
observed values of the mean proportion of recruits and its variance to model recruitment in a krill ... population in terms of numbers of recruits. The method includes the calculation of natural mortality and ... in the observed recruitment parameters. File: 04delamare-mod-rec.pdf ... , de la Mare (1994) presents a method for est imating the proportions of recruits in krill ... RECRUITMENT W.K. de la Mare Australian Antarctic Division Channel Highway, Kingston 7050 Tasmania ... L'auteur developpe une methode d'utilisation des valeurs observees de la proportion moyenne de recrues et ... de sa variance pour modeliser le recrutement, exprime en nombre de recrues, dans une population de ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 49–54 : Auteur(s): W.K. de la Mare
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Histological study on the ovarian development of mackerel icefish (Champsocephalus gunnari) from the South Georgia Islands
on ovarian development in Champsocephalus gunnari caught by the RV Dr Eduardo L. Holmberg in the ... South Georgia and Shag Rocks areas in February and March 1994. Six phases of oocyte development were ... to a regression stage. In some cases these ovaries presented few atretic oocytes; in others a ... generalised regression was found, which was observed in 41% of mature fish. A high proportion of juvenile ... shows an oocyte in primary vitellogenesis with a large yolk vesicle in the cytoplasm (e). nu - nucleus ... vitellogenesis (A) and in early secondary vitellogenesis (B). nu - nucleus, n - nucleoli, ec - external ... avancee de vitellogenilse (A) et en phase secondaire precoce de vitellogenilse (B). nu = noyau, n ... , B = 400 fois. Figure 3: Ovocyte en phase secondaire avanc6e de vitellogenilse. nu = noyau, g ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 35–49 : Auteur(s): Macchi, G.J. and E.R. Barrera-Oro
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Directed research. Antarctic Marine Living Resources (AMLR). A program development plan
living resources in the ocean areas surrounding Antarctica. The program is in support of US participation ... in the Commission and Scientific Committee of the Convention for the Conservation of Antarctic Marine ... , among other things, that: “(A) The Director of the National Science Foundation, in consultation with the ... States Antarctic Program; (B) The Secretary of Commerce, in consultation with the Director of the ... rJIaBaMH ,l(pyrHx 3aHHTepecoBaHHhlx ~e,l(epaJI hHhlX yt{pe~AeHHH AOJI~eH pa3pa6oTaTh H rrpoBecTH ... Bureau de la Science et de la Technologie NMFS, NOAA, Ministere americain du Commerce (ETATS-UNIS) Le ... Programme Americain de la Faune et la Flore Marines de l'Antarctique (AMLR) est un programme national ... destine it fournir les informations necessaires it la ligne de conduite americaine concernant la ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 363-373 : Auteur(s): Office of Science and Technology, NMFS, NOAA, US Department of Commerce (USA)
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Management and uncertainty: the example of South Georgia
: Decisions on fishery management are often made with some degree of uncertainty in scientific advice. Such ... to consider ways in which CCAMLR can improve its ability to take decisions in the face of uncertainty ... uncertainty. The question is addressed specifically in terms of the fishery of Notothenia rossii around South ... . AMENAGEMENT ET INCERTITUDE: L'EXEMPLE DE LA GEORGIE DU SUD J.A. Gulland Royaume-Uni Les decisions ... relatives a l'amenagement de la peche sont souvent prises dans un climat d'incertitude pour ce qui est des ... avis scientifiques. 11 est difficile de parer a une telle incertitude meme si une recherche plus ... approfondie devrait permettre d'en limiter l'etendue. 11 serait utile de determiner comment la CCAMLR ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 341-353 : Auteur(s): Gulland, J.A.
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Quantification of Southern Ocean phytoplankton biomass and primary productivity via satellite observations and biogeochemical models (submitted to the 2008 Joint CCAMLR-IWC Workshop)
described, from the Coastal Zone Colour Scanner (CZCS) in the late 1970s through to the Ocean Colour and ... regard to their use in the Southern Ocean. A brief history of algorithms linking ocean colour to primary ... 200 SeaWiFS production (gC m–2 year–1) 200 100 0 C IA O p ro du ct io n (g C m –2 y ea ... significant spatial and temporal vari- ability in primary productivity. It is also the region of the global ... ocean where models and observations of air–sea CO2 exchange differ most significantly, both in sign ... estimates of all terms in the oce- anic carbon budget, including primary productiv- ity. In this paper ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 247–265 : Auteur(s): P.G. Strutton, N.S. Lovenduski, M. Mongin and R. Matear
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Seabird by-catch by autoline vessels: do line setters increase the sink rate of integrated weight longlines?
m –1 lead core) longlines by some autoline vessels in the Kerguelen and Crozet Islands Patagonian ... . A trial was conducted in the Ross Sea to determine the effectiveness of line setters in increasing ... were identical, including in the first few metres of the water column where seabird interactions are ... depth of longlines for given distances astern. This increase in depth is minor and unlikely to result in ... eleginoides) des îles Kerguelen et Crozet pour décourager les oiseaux de mer en augmentant, semble-t-il, la ... vitesse d'immersion des lignes. Un essai a été mené en mer de Ross pour déterminer si les lanceurs de ... , selon une conception de traitement par paires. La vitesse d'immersion était identique, que les ... palangres aient été posées avec ou sans lanceur de ligne, y compris dans les premiers mètres de la colonne ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 107–114 : Auteur(s): Robertson, G., J. Williamson, M. McNeill, S.G. Candy and N. Smith
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Results of fish stock assessment survey, South Georgia, December 1987 - January 1988
complements earlier surveys in the same area and showed that most of the stocks are continuing to decline ... in abundance. File: 02-McKennna-and-Saila.pdf ... . Resume Les stocks de poissons commerciaux autour de la Georgie du Sud ont ete en declin depuis le ... enero de 1988. Esta complementa prospecciones anteriores en la misma area e indica que la mayoria de ... (Figure Sa). Without strong recruitment the decrease in biomass can be expected to continue. Despite ... Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Legendes des tableaux Estimations de la biomasse ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 19-52 : Auteur(s): McKenna, Jr., J.E. and S.B. Saila
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On the intensity of sampling krill trawl catches
uses actual krill length-frequency data in an attempt to address the problem of the determination of ... be discerned (e.g., length-with-age). At present, and in the interests of both statistical rigour and ... differences in length should be considered in conjunction with the need to collect information on maturity ... krill que ce document tente de resoudre le probleme de la determination de la taille de l'echantillon ... meme trait et decomposition des echantillons) d'influence potentielle sur la qualite des donnees de ... les mesures de longueurs du krill provenant de captures commerciales devraient (si possible) etre ... biologiques it discerner (par ex. longueur-avec-age). A present, et dans l'interet de la rigueur statistique ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 29–48 : Auteur(s): Miller, D.G.M.