Résultats de la recherche

1. Discrimination of Macrourus whitsoni and M. caml (Gadiformes, Macrouridae) using otolith morphometrics

   fishery in the Ross Sea region is comprised of two species, rather than being solely Macrourus whitsoni ... otoliths of the two species was sought. Based on 220 M. whitsoni and 307 M. caml otoliths, a linear ... excellent discrimination between the two species (92% success). A method was also developed to discriminate ... identified 90% of otoliths to species and could be applied to otoliths removed from toothfish stomachs to ... 80 60 40 20 30 40 50 60 70 80 90 TL (cm ... 80 60 40 20 0 10 20 30 40 50 60 70 Age (years ... 100 0 30 40 50 60 70 80 90 (c) TL (cm) R ou ... and one specimen was aged at 62 years (Pinkerton et al., 2013). For cases where neither TL nor PAL ...

   Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 15–28 : Auteur(s): Pinkerton, M.H., C. Ó Maolagáin, J. Forman and P. Marriott

2. Telemetry monitoring of ecological resources

   transmitters weighing approximately two kg and lasting about one year are routinely being deployed on ... system developed at the University of Minnesota in the mid-1960s 20 • It used two mechanically rotating ... PROCESSING, 45 DAYS D 20 PIT HIRE, INCLUDING A 1 0 SERVICE, 90 DAYS D 21 PIT HIRE, WITHOUT PROCESSING, 90 ... least two passes, whereas platforms nearer the poles will be in view with almost every pass. The ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 495-511 : Auteur(s): Kuechle, V.B.

3. Some thoughts on precautionary measures for the krill fishery

   the potential yield model developed by the CCAMLR Scientific Committee's Working Group on Krill ... spawning biomass dropping below 20% of its pre-exploitation median level over a 20-year harvesting period ... is 10%; and the median krill escapement1 in the spawning biomass over a 20-year period is 75% of ... leaving A is given by: However, the total number of krill leaving A in one year is also equal to @' . If ... consumption rate at time t is given by: and, therefore, the total prey consumed in one year is given by ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 1–11 : Auteur(s): Everson, I. and W.K. de la Mare

4. Seabird interactions with longlining operations for Dissostichus eleginoides around South Georgia, April to May 1994

   -seven line sets were observed and 98 deaths of seabirds were recorded over 20 sets; no deaths occurred ... albatrosses. The average mortality rate for the 20 sets was 0.48 birds/1 000 hooks and maximum mortality 3.12 ... curved point (Figure 1); these hooks were laid as either one or two continuous series on each line ... each species in the vicinity of the ship was recorded every 30 minutes. Of the 20 sets for which ... least one observer. Every two hours, estimates were made of the total number of birds of each species ... Georgia (sets 5 to 15) during night-time setting. These occurred in aggregations of 20 to 30 birds ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 111–121 : Auteur(s): Ashford, J.R., J.P. Croxall, P.S. Rubilar and C.A. Moreno

5. Phytoplankton distribution in the mixed layer: implication to krill abundance

   Abstract / Description:  A one dimensional Lagrangian model of random walk is presented to study the ... ...... 0 10 20 30 /"... 40 E "'--" ..c 50 -j-J 0.. ID -0 60 70 80 90 100 ... 10 20 30 40 /"... E "'--" 50 ..c -j-J 0.. ID 60 -0 70 80 90 100 w VI ... is shown beneath buoyancy frequency profile. 343 o 10 20 30 40 .5: 50 0+- D.. (J ... ) ""0 Figure 2: 344 60 70 80 90 100 10-10 10-9 10-8 10-7 10-6 10-5 10-4 10-3 G (W kg- 1 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 331–356 : Auteur(s): Yamazaki, H. and T.R. Osborn

6. Foraging behaviour and reproductive success in chinstrap penguins: the effects of transmitter attachment

   , South Shetland Islands. In total, one member of each pair at 20 nests and both members of each pair at ... transmitters are applied to one or both members of a breeding pair; and (iii) variability in foraging patterns ... may be no difference between trip durations obtained by applying the transmitters to one or both ... and the group with only one member equipped with a transmitter. Several of the differences in those ... 666 nests on Seal Island, South Shetland Islands. In total, one member of each pair at 20 nests and ... transmitter group: One member of each pair at 20 nests was equipped with a radio transmitter and marked with ... nest failures as the number of transmitters per nest increased from zero, to one, to two (P < 0.005 ... treatment groups, 91 % of the failures occurred prior to 10 January. Three of the 20 nests with one mate ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 291–303 : Auteur(s): Croll, D.A., J.L. Bengtson, P.L. Boveng, M.E. Goebel and J.K. Jansen

7. Management and assessment options for the crab fishery around South Georgia

   in addition to the &#039;size-sex-season&#039; controls. Implementation of both sets of controls ... design. One of the main aims in designing a management plan is to allow the fishery to develop at a rate ... s tar ted by one fishing vessel i n Subarea 48.3 (Ot to a n d Macintosh, 1992). P ... once every two to three years in the largest, most exploitable animals. The size at which moulting ... southwest Africa, 1979/80. Fish. Bull. S. Afr., 16: 45-55. Miquel, J.C., P.M. Arnaud and T. Do-Chi. 1985 ... given to their design. One of the main aims in designing a management plan is to allow the fishery to ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 193–202 : Auteur(s): Basson, M. and D.D. Hoggarth

8. A hybrid approach to acoustic classification and length estimation of krill

   / Description:  The problem of acoustically identifying and estimating the sizes of two euphausiid species is ... components are the mean ratios of the volume backscattering coefficients, measured at two different ... animal measurement. For small school- ing organisms, such as euphausiids, this criterion is seldom met ... only one frequency ratio is available (two- frequency method), its output can produce estimates only ... in the continental shelf region: E. superba was present in only one haul (two aggregations were ... they can be correctly assigned to one of two possible classes ωh = 1,2 on the basis of net sampling ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 33–58 : Auteur(s): Azzali, M., I. Leonori and G. Lanciani

9. A first attempt at an assessment of the Patagonian toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands EEZ

   -per-unit-effort (CPUE) trend. Application of a simple age-structured production model (ASPM) provides ... 2009 2012 2015 2018 2021 Year Bi om as s (t) 0 400 800 Exploitable biomass projections for base ... 2015 2018 2021 Year Bi om as s (t) 0 400 800 GLM CPUE B io m as s (to nn es ) B io m as s ... 2003 2006 2009 2012 2015 2018 2021 Year Bi om as s (t) 0 400 800 GLM CPUE Exploitable biomass ... 2003 2006 2009 2012 2015 2018 2021 Year Bi om as s (t) 0 400 800 GLM CPUE B io m as s (to nn ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 11–32 : Auteur(s): Brandão, A., D.S. Butterworth, B.P. Watkins and D.G.M. Miller

10. Analysis and modelling of the Soviet Southern Ocean krill fleet, II: Estimating the number of concentrations and analytical justification for search data

    navigational logbook will provide two kinds of data. First, from the navigational log, one can determine ... will provide two kinds of data. First, from the navigational log, one can determine whether krill are ... 18.9 hrs 693.6 (4-8), 61.2 (8-9) 1 290.4 50" 40' 20" o' 20' 40' 10' 30' 30' 10" 50" 60" 60 ... 10 15 20 30 40 50 60 70 Concentration Radius (nml) Figure 16: Histogram of the radii of ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 283–322 : Auteur(s): Mangel, M.

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