Résultats de la recherche

1. Age estimation and maturity of the ridge-scaled macrourid (Macrourus whitsoni) from the Ross Sea

   Islands in 2004. Intensive analysis of otoliths from these specimens greatly increased confidence in the ... interpretation of otolith growth zone structure, supporting the otolith interpretation protocol used in previous ... , using a reduced probit model. Résumé Lors de la campagne d’évaluation BioRoss de l’ouest de la mer de ... grenadier Macrourus whitsoni. L’analyse intensive des otolithes de ces spécimens a grandement amélioré la ... confiance dans l’interprétation de la structure des zones de croissance des otolithes, confortant ainsi le ... –0.159 pour les mâles et L∞ 92,03, K 0,055 et t0 0,159 pour les femelles. Les estimations révisées de la ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 291–303 : Auteur(s): Marriott, P.M., M.J. Manning and P.L. Horn

2. An index of per capita recruitment

   recruitment (PCR) is proposed such that where R 1 is the proportion of age-l animals sampled in year y and M ... age-l animals in the sample can be determined unambiguously. Normal, lognormal and uniform probability ... distributions of R I, and three levels of M were assumed in order to investigate the resulting distributions of ... years, and when all age-l animals spawn. These conclusions are insensitive to changes in the shape of ... reproducteur de 30% si les hypothPses avancPes sont raisonnables en ce qui concerne la variabilitg de la ... samples (de la Mare, 1994) where R1 is defined as the proportion of individuals in a given year of ... dans lequel R1 est la proportion d'individus d'5ge 1 echantillonnes en l'annee y et M est le taux de ... facteurs presumes l'affecter. La formulation de PCR repose sur plusieurs hypothPses : i) la mortalit6 des ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 179–196 : Auteur(s): Hewitt, R

3. Estimates of circumpolar abundance of Antarctic krill based on recent acoustic density measurements

   tonnes- at the low end of values that have been suggested in the past. The differences between our ... . Additionally, the current precautionary catch limits in the South Atlantic are set using a superseded acoustic ... survey of the South Atlantic in January 2000 may result in an effective biomass which is greater than the ... value used in the past. The seasonal and local consequences of large catch limits will have to be taken ... surestimation de la demande de krill des predateurs. M6me si ces estimations mettant en evidence une faible ... d'intensite acoustique qui est depassee et qui sous-estime la biomasse de krill par un facteur de trois, si ... . Aun si estas estimaciones bajas de la biomasa de kril son correctas, es probable que 10s limites de ... ) est estimee B partir d'estimations recentes de la densite de krill fournies par des campagnes ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 87–99 : Auteur(s): Nicol, S., A.J. Constable and T. Pauly

4. An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island

   conducted in 1990, 1992, 1993 and 1997. The assessments include estimates of all the parameters required ... of 900 tonnes in the 1997/98 season and 600 tonnes in 1998/99. File:  06delamare-etal.pdf ... in the years 1990, 1992 and 1993. The results of these surveys were reported in Williams and de la ... (see de la Mare, 1994a for details). The estimated density of a given year class in a stratum was ... model used in Trial 2. de la Mare et al. Results are shown in Table 11. It can be seen that the ... : 301447. Williams, R. and W.K. de la Mare. 1995. Fish distribution and biomass in the Heard Island ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 79–101 : Auteur(s): de la Mare, W.K., R. Williams and A.J. Constable

5. Target strengths of Antarctic krill (Euphausia superba)

   and 120 kHz in a sheltered bay at South Georgia. The results indicate that the Target Strength values ... mesurees a 38 et 120 kHz. Les resultats indiquent que les valeurs de la reponse acoustique sont nettement ... ~eu,H6e~ HH)I{e, lIeM paHee npe~no~araeMble. Resumen Se ha medido la Fuerza de Retrodispersi6n ... protegida en Georgia del Sur. Los resultados indican que los valores de la Fuerza de Blanco son ... Legendes des tableaux Resume des reponses acoustiques du krill par cas. La taille de I'echantillon ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 265–279 : Auteur(s): Everson, I., D.G. Bone, J.L. Watkins and K.G. Foote

6. Some principles for fisheries regulation from an ecosystem perspective

   studies of potential management procedures is briefly discussed. File:  17-de-la-Mare.pdf ... / Description:  The paper discusses some principles to be considered in the formulation of a framework for the ... Marine Living Resources. An important task in this formulation is to derive subsidiary objectives for ... out in the Convention. An important property required for subsidiary objectives is that they are ... . As discussed in Beddington and de la Mare (1986), there are a number of problems in interpreting ... by experiment could be of the order of hundreds of years (de la Mare, 1986a). In practice, it is ... relatively long because of the effects of variability in estimates of absolute or relative abundance (de la ... Watt (1968). Examples of this type of analysis are to be found in Hi1born (1979) and de la Mare (1986 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 323-339 : Auteur(s): de la Mare, W.K.

7. Fishing for toothfish using pots: results of trials undertaken around South Georgia, March–May 2000

   commercial viability of this fishing method for toothfish fisheries in the CCAMLR Convention Area. While the ... toothfish was notably lower than that achieved in the longline fishery. Importantly, the use of pots ... ~y npoMbrcny BoKpyr IOrn~oii reoprrru. TaGn. 3: Cpan~ew~e ynonon KnbrKava B pe?ynbTaTe nonymeworo ... viabilidad comercial de este m6todo de pesca en las pesquerias de palangre en el Area de la Convenci6n. Si ... elegir~oides) autour de la Georgie du Sud (sous-zone 48.3). Par comparaison avec la m6thode de p@che B ... oiseaux. Ce document decrit 11exp6rience et ses resultats, en pr6sentant une discussion de la viabilite ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 93–105 : Auteur(s): Agnew, D.J., T.M. Daw, G.M. Pilling and M.G. Purves

8. An assessment of the merits of length and weight measurements of Antarctic krill Euphausia superba

   predictors of wet or dry weight in Antarctic krill Euphausia superba Dana are standardised with new data on ... biomass based on acoustic data. An alternative approach is examined in which length and additional ... biological data are assessed in terms of decreases in the residual variance of relationships. We have ... identified key sources of variability where relatively small increases in the effort of analysis result in ... la precision de toute prediction portant sur la masse. Cependant, si l'on separe les femelles ... longueurs et le poids sec et vert en tant que fonctions du sexe, du stade de la rnaturite et du stade de ... l'incorporation de l'erreur dans les estimations de la biomasse basees sur les donnees acoustiques. Une autre ... supplementaires en fonction des diminutions de la variance residuel1e des relations. Nous avons identifie les ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 371-373 : Auteur(s): Morris D.J., J.L. Watkins, C. Ricketts, F. Buchholz, and J. Priddle

9. Beyond MSY: a consideration of definitions of management objectives

   different guidelines under more realistic population models, taking account of the objectives set out in ... criterios dependeran en si la mayor inquietud se encuentra en la sobrepesca de las poblaciones en ... exposes a l'Article II de la convention de la CCAMLR. Les criteres varieront selon que l'interet ... principal portera sur le recrutement ou la surexploitation au detriment de la croissance. 11 faudra ... ce qui concerne la presentation de suggestions a la commission concernant les pecheries de poissons ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 299-322 : Auteur(s): Gulland, J.A.

10. Selectivity of standard Polish commercial trawl codends on Antarctic fishing grounds

    Abstract / Description:  Selectivity studies were carried out for two types of steelon codends used in ... process- especially in the latter case- is not satisfactory. Scotia Sea icefish, Chaenodraco wilsoni, and ... the trawling among all the species studied. Conclusions and observations were in some cases based on a ... el arrastre, si bien la efectividad de este proceso - especialmente en el segundo caso - no es ... grace a I'utilisation d'une sang le a mailles ouvertes en permanence dans la fabrication des culs de ... selectivite necessaires pour la peche au pOisson des glaces de la Georgie du Sud qui, de toutes les especes ... est necessaire de proceder a d'autres etudes sur ce probleme, la production d'engins de chalutage ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 107-142 : Auteur(s): Zaucha, J.

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