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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.
( ) ( ){ } 1, 1 , 1 , exp 1 exp t a t a t a N N M C M M + + - = - ¢ ¢- - - (10) where M' = qM. So ... - tion and catch numbers-at-age (i.e. equations (3) to (10)). However, the process is made difficult by ... of 100 hauls where across hauls the expected num- ber of fish released was 10 giving 1 000 releases ... -function loess) Candy 10 fitted to the values of L. The PMLE of M obtained by taking the minimum of ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 1–27 : Автор(ы): Candy, S.G.
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A von Bertalanffy growth model for toothfish at Heard Island fitted to length-at-age data and compared to observed growth from mark–recapture studies
length-bin (LB) sam- pling (Goodyear, 1995), whereby length bins of, say, 10 mm are used and a maximum ... sh- ery, the sampling protocol for age determination specifi es that a maximum sample size of 10 fi ... sh for each 10 mm length bin be sampled for the range of lengths between 400 and 1 000 mm for a ... shing seasons. Note that although the length-bin sampling rule actually specifi ed 10 mm wide length ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 43–66 : Автор(ы): Candy, S.G., A.J. Constable, T. Lamb and R. Williams
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Defining smaller-scale management units to further develop the ecosystem approach in managing large-scale pelagic krill fisheries in Antarctica
08 constable-nicol PROOF.indd CCAMLR Science, Vol ... . Murphy. 1998. Krill transport in the Scotia Sea and environs. Ant. Sci., 10: 406–415. Constable ... ). 10 0 00 0 2 00 0 00 C at ch (t on n es ) KGL EI SO SG AP KGL EI SO ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 117–131 : Автор(ы): Constable, A.J. and S. Nicol
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Spatially explicit population dynamics models for Antarctic toothfish in the Ross Sea region
(years) 0 5 10 15 20 25 30 0 ... 5 10 15 20 25 30 Age (years) 1.0 0.8 ...
Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 19–37 : Автор(ы): Mormede, S., A. Dunn, S. Hanchet and S. Parker
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A post-processing method to remove interference noise from acoustic data collected from Antarctic krill fishing vessels
trawling and cruising speeds were about 3 and 10 knots respectively. The swarm echoes mainly consisted of ... Minimum Sv threshold (dB) –70 Min. horizontal candidate (m) 10 Min. vertical candidate (m) 0.5 Max ... / 10 5. 8 16 4/ 21 7/ 25 3 2. 22 /2 .6 7/ 3. 23 3. 03 /3 .5 3/ 4. 15 3. 30 /3 .8 8 ... / 4. 88 Pr oc es se d –5 8. 9/ –5 6. 3/ –5 3. 8 23 .9 /3 7. 8/ 10 3. 5 16 4/ 21 7 ...
Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 17–30 : Автор(ы): Wang, X., J. Zhang and X. Zhao
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Effects of recruitment variability and natural mortality on generalised yield model projections and the CCAMLR decision rules for Antarctic krill
) achieve a less than 10% chance that the spawn- ing biomass falls below 20% of its pre-fishing median ... level, was very small. Ratios of fished spawning biomass to unfished were above 0.2 in more than 10 ... different catches using the two CCAMLR decision criteria. Each trial of 10 001 simulations was run for 21 ... - tus in the final year of simulations in each of the 10 001 trials. The CCAMLR criteria were slightly ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 81–96 : Автор(ы): Kinzey, D., G. Watters and C.S. Reiss
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Results of fish stock assessment survey, South Georgia region, November - December 1986
most pronounced; by 1985, Kock (1985a) estimated stock size of N. rossii to be less than 10% of its ... described by the delta distribution much more accurately than the normal. Specimen lengths range from 10 ... ; however, the 13 cm mode was more pronounced at shallower stations (between 50-150 m) (Figure 10 ... , it appears that about 10% of the population is between 50-95% mature (e.g. 46-51 cm) and only 12 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 143-183 : Автор(ы): Gabriel, W.L.
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A fine-scale model of the overlap between penguin foraging demands and the krill fishery in the South Shetland Islands and Antarctic Peninsula
short (all about 10 km). Accordingly, the following standard parameters were chosen for the model ... ; Bengtson et al., 1991): chinstrap: mean 20 km, SD 8; Adelie: mean 38 km, SD 15; gentoo: mean 10 km, SD 4 ... number of major units, defined as 10 X 10 n mile 'squares'. To do this, the squares were each divided ... of d, S X S dn from the colony The total number of penguins of a particular species in a 10 X 10 ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 99–110 : Автор(ы): Agnew, D.J. and G. Phegan
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Fish stock assessment survey in Subarea 48.3
species sampled on the survey are presented in Figures 10 to 17. These have been calculated by weighting ... modal peak at 16 cm and a second, less distinct peak at 23 cm (Figure 10). There is no distinct mode ... are shown in Tables 10 and 11. The data from the age and length distributions have been combined to ... 1 22 1 6 13 53 19.80 42 44.30 463 27 2 22 1 10 10 53 28.40 42 18.20 232 30 3 22 1 14 20 53 26.00 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 25–67 : Автор(ы): Everson, I., G. Parkes, K.-H. Kock, S. Campbell, Z. Cielniaszek and J. Szlakowski
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An assessment of toothfish in Subarea 48.3 using CASAL
collated by 10 cm length class (Table 2). The scanned catch in each length class each year, required to ... et al., 2006a) to be between 5 and 11%. A conservative value of 10% (i.e. immediate tagging ... confidence intervals overlap with all the results shown in Table 10. The minor discrepancies are probably ... parameters. Figure 10 shows a plot of the median historic SSB for all scenarios for which MCMC runs were ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 65–95 : Автор(ы): Hillary, R.M., G.P. Kirkwood and D.J. Agnew
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