Résultats de la recherche

1. Modelling catch and effort data using generalised linear models, the Tweedie distribution, random vessel effects and random stratum-by-year effects

   generalised linear model (GLM) with a square-root link function and a unit variance function. A time series of ... model (GLMM), in order to provide more efficient estimates of the standardised CPUE time series and more ... usual GLM form which must be a function only of μ (i.e. including the simplest case of V(μ) = μ0 = 1 ... are obtained using an estimate of the variance of the sum of linear predictor terms used to form the ... - sible model of catch distribution, conditional on fi xed and random effects, to be used in the form of ... 20 30 40 50 -0 .6 -0 .4 -0 .2 0. 0 0. 2 0. 4 0. 6 Ship index R an do n ef fe ct e st ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 59–80 : Auteur(s): Candy, S.G

2. Long-term monitoring of krill recruitment and abundance indices in the Elephant Island area (Antarctic Peninsula)

   for the Elephant Island area with regard to the representativeness of the study area (60°-62 o 30´S ... and 53 o-57 o 30´W) for proportional recruit and density indices. Proportional recruitment indices ... the study area after 13 days, but was then trapped in an eddy system for another 30 days before ... data could be classified as having homogeneous densities. In this case the test procedure was to form ... lower densities excluded are those in the three years 1989, 1990 and 1991, which form a statistically ... form a statistically significantly different subset of densities. The results of these analyses are ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 19–35 : Auteur(s): Siegel, V., W. de la Mare and V. Loeb

3. 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

   adopted whereby the relatively long time series of catch-at-age and mark-recapture data from the main ... estimation, age–length keys, CCAMLR mailto:steve.candy@aad.gov.au Candy et al. 30 but excluding length ... the functional form of selectivity was correctly specified in the BODE model, both models gave close ... , when a minor misspecification of the functional form of selectivity was fitted, the CCODE model gave ... values obtained from CASAL for Ground B trawl catches for season 2 (mid-season: 1 May–30 September) and ...

   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

4. Consideration of major issues in ecosystem monitoring and management

   30–150 Calendar dateP ot en tia l r an ge fr om c ol on y Calendar date Foraging trip ... 10000 15000 0 10 20 30 40 50 60 70 80 90 100 Year Po pu la tio n si ze Recruitment fails twice ... at random each decade Recruitment normal 50% Survivorship 0 1000 2000 3000 4000 0 10 20 30 ... that the information is given as survivorship rather than mortality because that is the common form ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 213–232 : Auteur(s): Everson, I

5. 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.

   functional form of selectivity was correctly specified in the BODE model, both models gave close to unbiased ... substantially more precise. However, when a minor misspecification of the functional form of selectivity was ... form of selectivity was correctly specified in the BODE model, both models gave close to unbiased and ... precise. However, when a minor misspecification of the functional form of selectivity was fitted by the ... (F’s) combined with estimates of the parameters of a fishing selectivity function. The form of this ... since they are derived from the Baranov ODE. Note that it is usual to assume that both the form and ...

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

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

   ) abundance estimates by length bin, commercial catch-at-length data, standardised CPUE series for the trawl ... data. A key uncertainty is the number of ages fully selected by the main survey series. With all the ... – trawling and longlining. The annual cycle was split into three seasons: (s1) 1 December–30 April, 5 ... Integrated stock assessment for Dissostichus eleginoides using CASAL (s2) 1 May–30 September, and (s3) 1 ... October– 30 November. These seasons were structured to accommodate the main longline fishery occurring ... 120 and 160 hauls, each of which were of approxi- mately 30 min duration, that were randomly located ...

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

7. A comparison between otoliths and scales for use in estimating the age of Dissostichus eleginoides from South Georgia

   estimaciones de edad de las especies longevas derivadas de la lectura de escamas pueden ser muy imprecisas ... . Sustainable exploitation rates should have been 20-30% of that based on age determinations from scales, in ... continued undisrupted around the focus, the compressed and intervening circuli were considered to form an ... in otoliths. Mar. Ecol. Prog. Ser., 173: 253-265. White, M.G. 1991. Age determination in Antarctic ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 75–92 : Auteur(s): Ashford, J.R., S. Wischniowski, C. Jones, S. Bobko and I. Everson

8. A proposed management procedure for the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity

   for a more complete cover- age of the range of possible present resource sta- tus. These four OMs form ... left- most entry in Figure 4, where the bars represent the 90th percentiles. Figure 5 shows the ... hake resource. Afr. J. Mar. Sci., 30 (2): 291–310. SC-CAMLR. 1994. Report of the Thirteenth Meeting ... suggested in discussions with industry members. Observations on board the vessel South Princess (T ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 33–69 : Auteur(s): Brandão, A. and D.S. Butterworth

9. Preliminary study on nesting Adélie penguins disturbance by unmanned aerial vehicles

   . s pe ed : 1 5 m /s A lti tu de : < 30 A G L N oi se le ve l: 60 d B a t 2 ... ou nd o f a he xa co pt er a t a n al tit ud e of 30 m w as lo st in th e ... ve n es t N oi se le ve l: 60 d B a t 3 m , 30 d B a t 1 00 m Im pa ct m ... iti es in o pe n gr as sl an d an d fo re st Ea sy F ly S t-3 30 (S t-m od el ...

   Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 1–16 : Auteur(s): Korczak-Abshire, M., A. Kidawa, A. Zmarz, R. Storvold, S.R. Karlsen, M. Rodzewicz, K. Chwedorzewska and A. Znój

10. An index of per capita recruitment

    underestimate recruits per spawner by 30% if reasonable assumptions are made regarding the variability of ... series of PCR for Antarctic krill (Euphausia superba) sampled in the vicinity of the South Shetland ... 30% if reasonable assumptions are made regarding the variability of mortality and the proportion of ... reproducteur de 30% si les hypothPses avancPes sont raisonnables en ce qui concerne la variabilitg de la ... H3MeHYHBOCTM CMePTHOCTH H HOnH ~-JI~THHx HepeCTXIIJtiXCR oco6eI? PCR naeT 3aHMXeHHYH) ( ~ 3 30%) OqeHKy ... un sesgo adicional. En general, el PCR subestimara en 30% el numero de reclutas por reproductor si ...

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

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