Résultats de la recherche

1. Biogeographic patterns of benthic invertebrate megafauna on shelf areas within the Southern Ocean Atlantic sector

   the Weddell water masses that meet and mix in this region. Evident at smaller spatial scales are the ... antárticas y del Océano Austral idealmente toma en cuenta una variedad de datos sobre las propiedades ... Fisheries Science Center 8604 La Jolla Shores Drive La Jolla, CA 92037, USA Email – chris.d.jones ... assemblages d'invertébrés de la mégafaune benthique des habitats du plateau dans le secteur Atlantique, à ... répartition. Pour le secteur nord de la Péninsule Antarctique et les îles Shetland du Sud, les données ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 167–192 : Auteur(s): Lockhart, S.J. and C.D. Jones

2. An integrated stock assessment for the Patagonian toothfish (Dissostichus eleginoides) for the Heard and McDonald Islands using CASAL

   representative of the main plateau, where juvenile fish are found, but are of relatively low intensity in effort ... compared to the commercial shots. In contrast, the commercial shots are very restricted in space ... , consisting of three main grounds. The model implemented in CASAL is a simple, single-sex, single-area ... population model, but spatial complexity in the fishery was modelled using separate fishing selectivity ... . 19 04 0. 19 04 1. 99 23 0. 52 6 11 a2 -t ag s- ca lp e a2 -c al pe + ta g d ... . 30 4 0. 30 4 3. 46 8 0. 84 3 11 a2 -c al pe a2 -e ss + C -a -L p ro ce ss e rr ... de s in D iv is io n 58 .5 .2 u si ng C A SA L . M od el D es cr ip ti on Se ... de légine australe (Dissostichus eleginoides) aux îles Heard et McDonald (Division 58.5.2 de la ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 1–34 : Auteur(s): Candy, S.G and A.J. Constable

3. CCAMLR ecosystem monitoring and management: future work

   :  Harvesting of marine living resources in the Southern Ocean is managed by the Commission for the Conservation ... managing fisheries with the maintenance of ecological relationships included in the conservation objectives ... . In the late 1980s, CCAMLR’s precautionary approach was developed, incorporating principles of how to ... use scientific evidence in the decision-making process. Even though this approach was based on the ... información científi ca en el proceso de toma de decisiones. Si bien este enfoque se basa en la ordenación ... de una especie (kril antártico, Euphausia superba), la evaluación de los límites de captura toma en ... in g ca pa ci ty ; N = p op ul at io n nu m be rs ; M = m or ta lit y; R = r ... ll K ri ll Po te nt ia l f or m an y Pr ed at or s Si ng le lo ng -l iv ed p re d ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 233–253 : Auteur(s): Constable, A.J

4. Australian research on Antarctic bird and seal diets

   data on the diets of important vertebrate predator species in Prydz Bay and around the sub-Antarctic ... results are collated and summarised, and several important points emerge. In Prydz Bay, on which is ... Pleuragramma antarcticum are important in most diets, and many predators can switch between prey species. The ... KOJIHl.J:eCTBO HHpe)l(HMe nHTaHH.H KJIIO"4eBhIX BH,l{OB n03BOH0"4HhIX XHllJ;HHKOB, OOHTaIOllJ;HX B ... d'importantes especes de vertebres predateurs dans la baie de Prydz et autour des lies subantarctiques Heard ... et Macquarie. Plusieurs considerations emergent apres la confrontation et la recapitulation de ... resultats publies et non publies. Dans la baie de Prydz, centre de la zone d'etude prioritaire du ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 231-249 : Auteur(s): Williams, R.

5. A statistical method for estimating the level of IUU fishing: application to CCAMLR Subarea 48.3

   , and confidence intervals for, fish and bird catches by IUU vessels. In order to estimate an IUU catch ... there must have been at least one encounter with an FPV in a year; no encounters in a year are ... to have been observed when the IUU vessel and the FPV vessel were in the same place at the same time ... observed. These data were obtained in the early licensed fishery (1997) when few vessels used mitigation ... documentados y de alta calidad de las patrullas de los barcos guardapesca (FPV). El método toma en cuenta ... ct or w as c al cu la te d a s th e nu m be r of h oo ks d iv id ed b y 10 ... d’estimation des captures illicites, non déclarées et non réglementées (IUU) de poisson et de la capture ... bonne qualité et bien documentées. La méthode tient compte explicitement de la pêche IUU «vue» et «non ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 119–141 : Auteur(s): Agnew, D.J. and G.P. Kirkwood

6. Estimation of natural mortality using catch-at-age and aged mark-recapture data: a multi-cohort simulation study comparing estimation for a model based on the Baranov equations versus a new mortality equation.

   process error in predicted catch-at-age numbers. Simulations assumed 1 000 releases per year over 12 years ... perturbation by observational error were also carried out for each model in order to investigate the effect on ... estimates with that for M. In contrast, when sigmoidally shaped selectivity was simulated, and the ... functional form of selectivity was correctly specified in the BODE model, both models gave close to unbiased ... these CCAMLR fisheries (Constable and de la Mare, 1996). Although natural mortality is likely to vary ... ). To estimate Ft from equation (4) using known numbers caught in each age class, assuming M and Sa ... the BODE model requires an extra component to the log-likelihood which defines the process error in ... error were also carried out for each model in order to investigate the effect on estimation of M ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 1–27 : Auteur(s): Candy, S.G.

7. 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

   in integrated assessments via CASAL for the Heard and McDonald Islands (HIMI, Division 58.5.2 ... to 2008. A large proportion of the recaptures of fish released in this fishery were aged and these ... in R, based on alternative ordinary differential equations (ODE) for within-year population dynamics ... of M have been studied using simulation. In application to the data obtained for the HIMI main trawl ... Expected Recaptures B in R es id ua l V ar ia nc e Bin mean expected recaptures B in re si du ... nc e Bin mean expected recaptures B in re si du al v ar ia nc e ... al v ar ia nc e 0 20 40 60 0 10 20 30 40 50 Expected Recaptures O bs er ve d re ca pt ... Poisson. 0 10 20 30 40 50 0 50 10 0 15 0 Bin Mean Expected Recaptures B in R es id ua l V ar ia ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 29–45 : Auteur(s): Candy, S.G., D.C. Welsford, T. Lamb, J.J. Verdouw and J.J. Hutchins

8. Possible effects of different levels of krill fishing on predators – some initial modelling attempts

   CCAMLR Ecosystem Monitoring Program (WG-CEMP) in 1992, in order to investigate the possible effects of ... krill predator species. A 'one-way' interaction model is developed, in which krill abundance ... that variability in the annual recruitment of krill results in predator populations being less ... some krill predator populations, and on the possibility of biases in their estimation. These matters ... both SA and SI tend to zero when the krill biomass itself approaches zero (as in Figure 2) seems ... possibles de la p@che de krill sur les predateurs, les auteurs tentent d'etablir une premiPre structure de ... base de la modelisation, comme cela avait ete suggere pendant la reunion conjointe du Groupe de ... travail sur le krill (WG-Krill) de la CCAMLR et du Groupe de travail charge du Programme de contr6le de ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 79–97 : Auteur(s): Butterworth, D.S. and R.B. Thomson

9. 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

   :  The former fishing ground off Joinville–D’Urville Islands was revisited in the course of the Antarctic ... Expedition ANT XIX/3 by RV Polarstern in February 2002. Five hauls were conducted north of the two islands at ... depths of 149 to 282 m on 21 February 2002. Published and unpublished reports from fishing operations in ... the 1970s and 1980s by the Fischkombinat in Rostock (former GDR), Sea Fisheries Institute in Gdynia ... ep s + + + R ac ov it zi a gl ac ia lis ... Jolla Shores Drive La Jolla, CA 92037, USA K. Shust VNIRO 17a V. Krasnoselskaya Moscow 107140, Russia ... (Euphausia superba) formed a major element in the diet of icefi sh. Résumé Au cours de l'expédition ... ), ainsi que du matériel disponible auprès de YugNIRO, Kerch (Ukraine). La CCAMLR ne disposait pas encore ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 1–20 : Auteur(s): Kock, K.-H., L. Pshenichnov, C.D. Jones, K. Shust, K.E. Skora and Zh.A. Frolkina

10. Distribution of mackerel icefish (Champsocephalus gunnari) (Channichthyidae) around South Georgia at various stages of its life cycle

    cm in length) were mainly found in the southern part of the study area, immature fish (15–25 cm) in ... the east and southwest, and adults (25–39 cm) in the north. The distribution of C. gunnari changes ... bottom during the day and in the water column at night. Larger fish (>40 cm) did not undertake ... vertical migrations. Variations found in the depth distribution of C. gunnari relate both to fish length ... S ou th G eo rg ia ( ba se d o n pe la gi c su rv ey re su lt s) . V es se l ... So ut h G eo rg ia s he lf (3 0 A pr il to 3 M ay 1 98 4) , S ha g R oc ks a ... columna de agua durante el día, retornando a las capas más profundas por la noche. Si bien se encontró ... (Champsocephalus gunnari) autour de la Géorgie du Sud (sous-zone statistique 48.3 de la FAO) à divers stades de ...

    Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 49–69 : Auteur(s): Frolkina, Zh.A

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