Résultats de la recherche
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Exploratory fishing for Dissostichus spp. in the Antarctic region (Subareas 48.1, 48.2 and 88.3)
system) were used for the operation, with variable quantities of fish hooks (1 440 to 4 320), No. 9 ... 'S). Yields of Dissostichus spp. were very low in the three subareas, with values of only 5.7 g ... operation, with variable quantities of fish hooks (1 440 to 4 320), No. 9 Mustad Kirby type, set between ... very low in the three subareas, with values of only 5.7 g/hook (Subarea 88.3), 19.1 g/hook (Subarea ... similar characteristics to D. eleginoides with a distribution described south of 60"s around the ... accordance with the CCAMLR Scheme of International Scientific Observation participated in the cruise ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 1–17 : Auteur(s): Arana, P.M. and R. Vega
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Evidence to support the annual formation of growth zones in otoliths of Antarctic toothfish (Dissostichus mawsoni)
D. mawsoni that had been injected with oxytetracycline some years before recapture. The six ... in each consecutive mode. This indicates that the modes represented year classes and that one ... estimates agree with growth curves calculated previously from a sample of data that was large but lacked any ... , 2.5 and 3.5 years were estimated to be 14, 28, 37 and 46 cm total length (TL) respectively. These ... released since 1972 (DeVries and Eastman, 1998). Some of these tagged fi sh were also injected with ... between 0+ and 3+ years. A length-frequency distribution of the aged fi sh by estimated year class ... early years of growth. However, because of the lack of small D. mawsoni, it was not possible to link ... sections from 1+, 2+ and 3+ fi sh are shown in Figure 3, with the positions of the translucent zones ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 125–138 : Auteur(s): Horn, P.L., C.P. Sutton and A.L. DeVries
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Preliminary analyses of data collected during experimental phases of the 1994/95 and 1995/96 Antarctic crab fishing seasons
000 legal-sized male crabs/n mile 2, and there was a lot of uncertainty associated with these ... equal to 1.0 (see Figure 3, middle panel). Consistent with such predictions, all of the hauls made ... smooth terms which were retained in equation 1 were reparameterised with 3 df. The 3 df model was ... with gamma errors and log-link to the positive CPUE data. The middle panel shows the trend in predicted ... associated with these estimates. In general, t l ~ e experimental harvest regime was successful. The regime ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 141–159 : Auteur(s): Watters, G
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The CCAMLR-2000 Krill Synoptic Survey: a description of the rationale and design
will take several years and will result in a significant increase in the knowledge of krill length ... krill is managed under the direction of CCAMLR, and regulated in accordance with a sustainable ... providing new opportunities for improved analysis. At present, however, no consensus exists with regard to ... uncertainty regarding the relative abundance of krill in the open ocean compared with that over the ... . However, these ecological boundaries do not necessarily coincide with the artificial limits of the ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 1–23 : Auteur(s): Trathan, P.N., J.L. Watkins, A.W.A. Murray, A.S. Brierley, I. Everson, C. Goss, J. Priddle, K. Reid, P. Ward, R. Hewitt, D. Demer, M. Naganobu, S. Kawaguchi, V. Sushin, S.M. Kasatkina, S. Hedley, S. Kim and T. Pauly
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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.
; constant catch ODE (CCODE) model uses a new total mortality ODE with constant within-year catch per unit ... process error in predicted catch-at-age numbers. Simulations assumed 1 000 releases per year over 12 years ... obtained by integrating an ordinary differential equation (ODE) for within-year population dynamics. The ... with recruitment average of 2 million with annual coefficient of variation (CV) of 0.3 and annual catch ... predicted catch-at-age numbers. Simulations assumed 1 000 releases per year over 12 years with ... series of YCS, Γ pfy , for the pre-fishery (pf) years combined with the first year of the fishery ... 12 fishing years starting in calendar year 2010, with this number of fishing years chosen to reflect ... (CCODE) model uses a new total mortality ODE with constant within-year catch per unit time and does not ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 1–27 : Auteur(s): Candy, S.G.
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Sensitivity analysis for parameters of predatory species CCAMLR Ecosystem Monitoring Program
) Figure 3: Frequency distribution of Adelie penguin first post-hatch foraging trip lengths. Sexes and ... vertebrate population parameters of interest with acceptable reliability. To comment on the suitability of ... simulated, and variances estimated if no real data exist, the use of actual data with 'real' variance ... enables estimates of required sample sizes for specified detection capabilities to be made with greater ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 411–432 : Auteur(s): Whitehead, M.D.
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Further computations of the consequences of setting the annual krill catch limit to a fixed fraction of the estimate of krill biomass from a survey
), as a function of the fraction of the biomass estimate which is set as the catch for a 20-year period ... -year period of harvesting are shown primarily in graphical form, with this probability plotted ... appears together with the coefficients 4 and 2 for the summer (1/4 year) and winter (1/2 year) fishing ... , ) for tl <_l! e, = e:: + W, / 2 (3) where ty from U [38,42] mm with W, = 10 mm, and ... years, and t measures time after the 'start! of the year. As the three-month growth period ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 81–106 : Auteur(s): Butterworth, D.S., G.R. Gluckman, R.B. Thomson, S. Chalis, K. Hiramatsu and D.J. Agnew
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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 ... one- and two-year-old krill (R 1 and R 2 respectively). Statistically significant fluctuations in ... variance, with year as a factor. However, because the density data depart very markedly from normality ... in which the highest mean density occurred with each other year, from lowest to highest until HO is ... time, are significantig different, (a) comparing the year with hi fest mean density (1977/78) with ... the remainder, e inning with the year with lowest density, Tb) comparing the year with lowest mean ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 19–35 : Auteur(s): Siegel, V., W. de la Mare and V. Loeb
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Sexing of adult Adélie penguins by discriminant analysis of morphometric measurements
shift). It was found that the combination of flipper breadth, bill depth and length of the middle toe ... "Standard of Birds' Measurements" proposed by Baldwin et al. (1931) with some modifications suggested by ... formula, and comparing the results with the constants shown in Table 1. To verify the valIdity of this ... suggestions, and CERLAP for its assistance. REFERENCES AINLEY, D.G. and W.B. EMISON. 1972. Sexual ... incubation shift). It was found that the combination of flipper breadth, bill depth and length of the middle ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 543–549 : Auteur(s): Scolaro, J.A., Z.B. Stanganelli, H. Gallelli and D.F. Vergani
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Archival and satellite-linked data recorders
million readings and store up to 256 KBytes for) 1 year. » Units optionally provided with 2 depth ... animal of interest and subsequently recovered together with the stored data, and Satellite-linked ... investigated 24 hours a day for periods of days to months with little or no intervention on the part of the ... performed. The instrument provides continuous data recording for approximately 11 days with a time of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 475-493 : Auteur(s): Hill, R.D.