Résultats de la recherche
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Some comments on the procedure for testing estimators of krill abundance which utilise survey data
considered by Miller and Hampton (1989a) using simple two-level models. 2. DATA AND METHODS The krill ... } + Ail e-A,lY]-l, and Y is related to the (typical) radius of the concentration. (1) (2) The ... of proportionality for the two expressions of equation (2) could differ, but in the interests of ... radii, so that the true probability function would be some weighted average of equation (2) over ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 191–205 : Auteur(s): Butterworth, D.S., D.L. Borchers and D.G.M. Miller
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Review of length-weight relationships for Antarctic krill
published length-weight relationships from the point of view of their seasonal variations. 2. DISCUSSION ... -calculated to facilitate direct comparison with other published coefficient values. Tables 1 and 2 show ... both dry weight (Table 2) and wet weight (Table 3). Morris et al. (1988) noted that 'surprisingly ... February M 0.00007 3.720 16-58 129 3A spent Siege! (1986a) F 0.00026 3.205 16-59 132 3E spent Table 2 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 145–155 : Auteur(s): Siegel, V.
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Fishery Report 2017: Dissostichus eleginoides Kerguelen Islands French EEZ (Division 58.5.1)
exclusive economic zone (EEZ) established in 1978 around the Kerguelen Islands in Division 58.5.1. 2 ... the Kerguelen EEZ) during winter 2007, 2 and reports from France indicate that IUU activities ... Division 58.5.1, of which 6 061 have been recaptured (Table 2). Only few tagged fish have been recovered ... 2: The number of individuals of Dissostichus eleginoides tagged and recaptured in each season in the ...
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Prey monitoring surveys: a discussion of the characteristics necessary in prey surveys
within the range 0 to 100 metres from the surface. Albatrosses are unable to dive deeper than about 2 ... Chinstrap Penguin 23 Nov-13 Dec (guarding) or 2 Jan (creche) 20 Dec-13 Jan (guarding) or 21 Feb (creche ... Figure 2. Very little of the area is unsuitable for survey. Appropriate periods for predator monitoring ... guarding phase is completed by about 2 Jan and creche phase by about 21 Jan. A survey timed to last for ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 377-391 : Auteur(s): Everson, I.
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An assessment of the exploratory fishery for Dissostichus spp. on BANZARE Bank (CCAMLR Division 58.4.3b) based on fine-scale catch and effort data
grounds rep- resent 31% of the total fishable area (i.e. depth < 2 000 m) in the division. Anomalous or ... missing data Of the 2 063 separate longline sets reported for BANZARE Bank since the fishery commenced ... construct 1 000 bootstrap estimates of parameter values. By considering bootstrap distributions at α/2 and ... 1–α/2 percentile points, 100(1 – α)% confidence intervals (CIs) for parameters were constructed ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 55–78 : Auteur(s): McKinlay, J.P., D.C. Welsford, A.J. Constable and G.B. Nowara
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Assessment and tag program adaption methods for exploratory fisheries in the CAMLR Convention Area: an example application for Division 58.4.3a
this tagged population over time is as follows: , 1 , exp 1 . r y r y L IUU y y T T M TS h h (2 ... harvest rates seen in equation (2) are simply defined as , , L IUU yL IUU y y C h B K . (3 ... abundance data, I: Hillary 104 1 2 22 ,, ˆln ln1 ... exp 22 y y y Iy y I I I p I (4) where ... term in equation (4) is a composite of observa- tion (bar) and process error (PE): 2 2 2 , ,y I y I PE ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 101–113 : Auteur(s): Hillary, R.M
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Fishing for toothfish using pots: results of trials undertaken around South Georgia, March–May 2000
Zone of Uruguay, with catch rates of between 1 and 2 tont~es/day (green weight) being reported. Such ... Table 2. Most toothfish were lively and in good condition when hauled aboard. However, when pots had ... -1 219 N(NW) Georgia 6 8 800 9 256 805 355-1 344 E Georgia 5 5 500 5 875 832 321-1 257 Table 2 ... Catch Catch per Unit Gear (kg) Pot Long line 128 1.28 kg/ ot, 128 k per 5 km line 2 788 0.35 kg ...
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
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Target strengths of Antarctic krill (Euphausia superba)
explanation. 2. EXPERIMENTAL DESIGN Earlier studies on the target strength of euphausiids and other small ... occasion. The krill were kept in a cluster of four holding pens. Each was cylindrical in form, with 2 m ... day. In addition, the light intensity at the same depth was recorded at 2-minute intervals. 5. DATA ... krill had to be purged for the following reasons: (1) early use of wrong integration limits, (2 ...
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
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Midwater trawl catchability as an aspect of a quantitative assessment of krill biomass conducted using a trawl census survey
simulation studies of fishing trawls. 2. METHODOLOGY It is well known that for trawl census surveys ... hauling period T; P - trawl catchability. (1) (2) Assuming that information on values So S, B, Bo ... contains no errors, the relative error in the biomass estimate from formulas 1 and 2 will be calculated as ... formulas 1 and 2 will be minimal if the catchability coefficient is equal to 1.0. Moreover, the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 257–272 : Auteur(s): Kasatkina, S.M.
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Fishery Report 2017: Exploratory fishery for Dissostichus mawsoni in Subarea 88.2
toothfish (D. eleginoides) caught counting towards the catch limit for D. mawsoni. 2. Subarea 88.2 is ... , Annex 41-10/B. 2 3. The limits on the exploratory fishery for D. mawsoni. in Subarea 88.2 ... fishery from 2008 to 2017 are presented in Figure 2. These length-frequency distributions are unweighted ... (Figure 2). In SSRUs 882C–G, there was a distinct mode at about 60–80 cm, meaning that in years when ...
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