Resultados de la búsqueda
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The Kerguelen database
- Abstract A database for fishery statistics and biological WG-CFSA-86/3 data for the Kerguelen EEZ has ... effort occurs in the Southern, South-Eastern part of the shelf (see Figure 8). The effort extends from ... period. The same analysis, but on a seasonal base, is given in Figures 3 to 5. The period extends ... established for this species have been in force for several years. In recent years, catches of N ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 23-54 : Autor(es): Duhamel, G.
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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 ... together with ‘baseline’ parameter estimates, their variance–covariance matrix, and the inverse-link ... function. An alternative GLM with a more rigorous theoretical basis is introduced here. Catch is modelled ... as the response variable using a GLM with a power variance function, with the power parameter (λ ... early years of the fi shery and the effect this can have on ‘treatment’ (i.e. YEAR) fi xed-effect ... q j n η ε model (3) where ijijij E εε and Var ij ij( )′ =ε φ with correspond- ing dispersion ... Candy (2003a). However, in order to allow direct comparison of model (2) with model (3), which both ... key point to be noted from Figure 8 is that for the early years of the fi shery the estimated CPUE ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 59–80 : Autor(es): Candy, S.G
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Krill population biology during the 1991 Chilean Antarctic krill fishery
size from 1.5 to 3 cm). Two subsamples of 100 specimens each were taken from 50 samples and analysed ... and 55 mm TL, with a mean TL of 45 mm for females and 48 mm for males. A very weak mode for juvenile ... % juveniles. Of the females sampled, 25.2% bore spermatophores. Although the smallest specimen found with a ... spermatophore had a 36.5 mm TL, 80% of the females with spermatophores had a TL larger than 45 mm. In Area B, a ... were between 45 and 53.7 mm TL with a mode of 46.5 mm TL (Figure 3). In Area B north of Elephant ... ) Figure 3: Size frequency distribution of total females and females with spennatophores in Area A. 230 ... from 1.5 to 3 cm). Two subsamples of 100 specimens each were taken from 50 samples and analysed. The ... between 30 and 55 mm TL, with a mean TL of 45 mm for females and 48 mm for males. A very weak mode for ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 223–235 : Autor(es): Mujica R., A., E. Acuña S. and A. Rivera O.
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Age determination of Notothenia gibberifrons from the South Shetland Islands, Antarctic Peninsula subarea (Subarea 48.1)
most reliable method. Mean length data at age presented here for Low I. specimens were compared with ... scale readings gave a result of one year more. This could arise from the difficulty in differentiating ... , while Hoffmann (1982) worked with first pelvic fin ray. Later on, Clasing et al. (1985), using otoliths ... 1 3 1 4 1 5 1 6 1 7 1 8 1 9 Mean length (cm) data according to age (years) of Notothenia ... one extra year (Table 1). This could arise from the difficulties with false checks as mentioned above ... presented here for Low I. specimens were compared with previous published values. This confirmed that fish ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 143-160 : Autor(es): Barrera-Oro, E.
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Quantifying movement behaviour of vessels in the Antarctic krill fishery
/ Description: Ten years of recent fine-scale haul-by-haul krill data were used to characterise the behaviour ... operations by Japanese fishing vessels. There were differences between statistical areas with longer ... analyses demonstrate the need for high-quality year-round data on all vessels participating in the krill ... catches of 10–15 tonnes/haul and greater with a corresponding average distance of approximately 2–3 n ... tonnes/haul, then the fleet stays with the current krill concentration, but if it is below 3 tonnes ... longitudinal data using smoothing splines (with discussion). Appl. Stat., 48 (3): 269–311. Welham, S.J. and ... abundance coincided with a year with a relatively high prob- ability of fishing operations observed to ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 131–148 : Autor(es): Kawaguchi, S. and S.G. Candy
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A compilation of parameters for ecosystem dynamics models of the Scotia Sea – Antarctic Peninsula region
global ocean circulation model. This parameter set, like most others, is associated with considerable ... , with perciform fish taking as much krill as whales, penguins and fur seals combined and myctophid fish ... most others, is associated with considerable uncertainty, which must be taken into account when it is ... suggest that fi sh are the major krill consumers in all SSMUs, with perciform fi sh taking as much krill ... species must also be parameterised. The models must also account for uncertainties associated with the ... , Scotia Sea, krill–predator–fi shery model, life history, krill consumption, ecosystem model, CCAMLR 3 ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 1–25 : Autor(es): Hill, S.L., K. Reid, S.E. Thorpe, J. Hinke and G.M. Watters
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Survey of Antarctic fur seals in the South Shetland Islands, Antarctica, during the 1986/87 austral summer
seals in the South Shetland Islands have been censused sporadically over the past 80 years, with the ... , USA 2. Tjarno Marine Biological Institute, PI. 2781, S-45200 Stromstad, Sweden 3. 8224 Windsor View ... increased to a population estimated in the early 1980's at just under 1 million (Payne 1977; Banner, 1981 ... ) to estimate the current annual pup production in the archipelago, and 3) to identify fur seal ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 427-440 : Autor(es): Bengtson, J.L., L.M. Ferm, T.J. Härkönen, E.G. Schaner and B.S. Stewart
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A comparison between otoliths and scales for use in estimating the age of Dissostichus eleginoides from South Georgia
with age. Patagonian toothfish (Dissostichus eleginoides) is considered to be a long-lived species ... Ecomet 3 grinder-polisher, using Mark V Laboratory 3M aluminium oxide polishing paper, and covered with ... 3), with-otolith treatments were sigruficantly different, and treatment comparisons using SNK and ... with age. Patagonian toothfish (Dissoslicliirs elcginoides) is considered to be a long-lived species ... . eleginoides ~ 1 3 pafio~a W X H O ~ ~ r e o p r ~ k i , ~cnonbsyzr Ii O T O ~ U T b I , 1.1 YeLLIYW. B C ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 75–92 : Autor(es): Ashford, J.R., S. Wischniowski, C. Jones, S. Bobko and I. Everson
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Results of fish stock assessment survey, South Georgia, December 1987 - January 1988
Abstract / Description: Commercial fish stocks around South Georgia have been declining since the early ... other species showed either an increase in mean size with depth or no apparent change (Table 3 ... Commercial fish stocks around South Georgia have been declining since the early 1970's. A survey to monitor ... stocks have been declining since the late 1970's (Kock 1985,1986; Gabriel 1987). In the early 1970's the ... survey cruise and discuss their changes over recent years. The analysis is based mostly on the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 19-52 : Autor(es): McKenna, Jr., J.E. and S.B. Saila
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Towards an initial operational management procedure for the krill fishery in Subareas 48.1, 48.2 and 48.3
year period, with a reference CPUE level (CPUE ref) calculated as the average CPUE over that time ... year, depending on how many of the previous three years' CPUE values fall below a target level of ... tonnes; c r =15%) and (C c =2 million tonnes; c r =10%). Suggestions for proceeding with further ... prevent the expected lowest biomass of krill over a 20-year harvesting period from falling below 60% of ... CPUE values for the previous three years (y-l, y-2 and y-3): 195 r C(y-1)[1-2cJ1oo] C(y) = ~ C(y ... . Annual TACs are restricted to an initial ceiling (Cc) for a five year period, with a reference CPUE ... ) Average annual catch over 20 years: Cav (objective n.). (ii) Catch in twentieth year: C20• 197 ... the management procedure. TAC in year y. Average annual catch over the first 20 years of operation ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 189–219 : Autor(es): Butterworth, D.S.