Resultados de la búsqueda

1. Krill distribution in the western Atlantic sector of the Southern Ocean during 1983/84, 1984/85 and 1987/88 based on the results of Soviet mesoscale surveys conducted using an Isaacs-Kidd midwater trawl

   needed to obtain such material. Previous surveys carried out annually over nearly 20 years covered only ... " 50" 45" 40" 35" 30" Figure 4: Krill diskibution (g/ l 000 m3) in strata 0 to 100 m, 20 January to ... currents (relative to the 1 000 dbar), 20 January to 9 March 1988. 60" 55" 50" 45" 40" 35" 30" Figure 7 ... article we present an analysis of krill distribution using data obtained during three mesoscale surveys ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 59–70 : Autor(es): Sushin, V.A. and K.E. Shulgovsky

2. Fatty acid and stable isotope analyses to infer diet of Antarctic toothfish caught in the southern Ross Sea

   ) and 120–135 cm (D). Values are mean ± SD. 70 60 50 40 30 20 10 0 % c om po si tio n ... OCT Octopodidae Octopus 10 0 20 0 30 SZT Pogonophryne scotti Plunderfish 25 0 0 3 28 PRA Pasiphaea ... . 0 ± 0. 7 C 18 :1 n9 c 20 .2 19 .5 ± 6 .4 21 .7 ± 0 .3 14 .1 30 .1 ± 2 .8 ... Science, Vol. 20 (2013): 21–36 21 FATTY ACID AND STABLE ISOTOPE ANALYSES TO INFER DIET OF ANTARCTIC ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 21–36 : Autor(es): Jo, H.-S., I. Yeon, C. Lim, S.M. Hanchet, D.-W. Lee and C.-K. Kang

3. Status of the coastal stocks of Dissostichus spp. in East Antarctica (Divisions 58.4.1 and 58.4.2)

   operating off the coast of East Antarctica (30°E–150°E; FAO/CCAMLR Divisions 58.4.1 and 58.4.2) since 2003 ... with the Ross Sea, where an analytical assessment has been possible for several years, and through ... (only five where time at liberty was a year or more). These recaptures were inconsistent with ... 58.4.2. Fishing years extend from 1 December of the previous year to 30 November of the named year ... years was virtually in the same place each year (Appendix 2, Figures 2.1(g, h and i)). Fish could ... . have been operating off the coast of East Antarctica (30°E–150°E; FAO/CCAMLR Divisions 58.4.1 and ... for several years, and through analysis of local depletion events. Results indicated SSRU vulnerable ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 71–100 : Autor(es): Agnew, D.J., C. Edwards, R. Hillary, R. Mitchell and L.J. López Abellán

4. Estimating optimal observer coverage in the Antarctic krill fishery

   on board for about 30% of that season. They have achieved a rate of krill sampling equivalent to 18 ... vessels sampled each season, 20% of total season hauls sampled for krill and an equivalent or higher ... . The South Georgia data suggest that such strategies should be pursued for at least four years before ... (% ) T ot al h au ls w it h kr ill sa m pl in g (% ) A ca m ar 20 02 30 7 ... 05 46 3 22 4 13 7 61 56 30 41 12 Fe ol en t 20 05 43 1 43 6 32 6 ... 75 78 76 24 18 A tl an ti c N av ig at or 20 05 30 3 54 40 74 ... 07 30 8 In su ng H o 20 07 62 9 N iit ak a M ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 139–154 : Autor(es): Agnew, D.J., P. Grove, T. Peatman, R. Burn and C.T.T. Edwards

5. An index of per capita recruitment

   assumptions that: (i) post-recruit mortality does not vary over age or between years; (ii) 100% of age-l ... years, and when all age-l animals spawn. These conclusions are insensitive to changes in the shape of ... underestimate recruits per spawner by 30% if reasonable assumptions are made regarding the variability of ... spawners and recruits. PCR was also able to track cycles in recruits per spawner after a 20% random ... appearing as a large mode at 20 to 30 mm length and in subsequent years as progressively longer length ... modes (Figure 1). The 20-year time series of R1 constructed from these observations (Siege1 et al ... years except for the moderate year class of 1990/91. The non-linear transformation of R1 to PCR ... as age-l animals. In the intervening years without strong year classes the dominant length mode is ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 179–196 : Autor(es): Hewitt, R

6. Length-based assessment for mackerel icefish (Champsocephalus gunnari) at South Georgia

   the given harvest control rule to set a two-year total allowable catch (TAC). One issue is the ... Length (cm) 10 20 30 40 50 60 Figure 1 ... - aggregated (right). 2009 survey Length (cm) D en si ty 10 20 30 40 50 10 20 30 40 5010 20 30 ... 40 50 30 20 10 0 30 20 10 0 (a) D en si ty 20 15 10 5 0 2009 survey Length (cm) 10 ... 20 30 40 50 (b) Hillary et al. 134 In equation (6) the ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 129–137 : Autor(es): Hillary, R.M., C.T.T. Edwards, R.E. Mitchell and D.J. Agnew

7. Estimating the impact of depredation by killer whales and sperm whales on longline fishing for toothfish (Dissostichus eleginoides) around South Georgia

   and 4 animals, and have a relatively lower impact on catches, depressing CPUE by up to 20%. Sperm ... whales have been more frequently encountered in recent years, occurring in larger pod sizes, whereas ... 30 3 20 06 4. 2% 4. 9% 4. 4% 3 53 5 3 68 3 3 70 7 3 69 0 20 07 3. 8 ... 30 56 1 23 9 36 3 67 0 1 09 6 5. 1 23 .3 0. 40 0. 65 20 07 14 68 ... 1 62 6 26 1 75 5 58 2 4. 2 14 .0 0. 38 0. 30 20 08 18 51 1 51 1 ... South Georgia Li ne s S P W o bs er ve d (% ) 100 90 80 70 60 50 40 30 20 10 0 May ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 163–178 : Autor(es): Moir Clark, J. and D.J. Agnew

8. Natural mortality rate in the mackerel icefish (Champsocephalus gunnari) around South Georgia

   - E a, f F 0 8 6 -5 -10 -1 5 -20 3 4 5 6 7 8 9 Age (years) Olsen Frolkina Kock ... . The age/length key from 1972 was obtained from a period several years after large-scale fishing ... recruited at age 3 years. Using the assumption that fish are fully recruited to the fishable population ... by age 3 years, the annual survivorship has been estimated (Table 1 and Figure 2). The mean and 95 ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 245–257 : Autor(es): Everson, I

9. A statistical method for estimating the level of IUU fishing: application to CCAMLR Subarea 48.3

   measures. Three years were analysed: 1998/99, 1999/2000 and 2000/01. Each year fully covered the period 1 ... October to 30 September, thus including one summer and one winter period. The estimated mean toothfish ... respectively (a total over the three years of 1 994 tonnes). The distribution of estimated total bird catch was ... highly skewed, with medians in the three years of 621, 2 852 and 550 birds respectively. 95% confidence ... ) W ei gh ti ng fa ct or S A rg os H el en a 26 -F eb -9 7 20 -A ug -9 7 9 30 3. 49 ... 91 .9 1 14 2 1. 54 5 9 S C is ne V er de 20 -M ar -9 7 30 -M ay -9 7 6 99 .8 ... -9 7 9 94 9. 35 18 9. 3 14 0. 07 4 19 W C is ne V er de 20 -M ar -9 7 30 ... analysed: 1998/99, 1999/2000 and 2000/01. Each year fully covered the period 1 October to 30 September ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 119–141 : Autor(es): Agnew, D.J. and G.P. Kirkwood

10. Investigation of bias in the mark–recapture estimate of toothfish population size at South Georgia

    allows simulation of releases by box over multiple years. The model performed as expected with test ... of toothfish typically move only 20–30 km each year (Marlow et al., 2003). This paper investigates ... 250000 est. population (n) fis hi ng e ff or t (1 00 0 ho ok s) 0 10 20 30 40 50 60 70 ... 10 20 30 40 50 60 70 80 90 0 50000 100000 150000 200000 250000 est. population (n) pr oj ... 40 20 0 90 80 70 60 50 40 30 20 10 0 0 50000 100000 150000 200000 250000 ...

    Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 47–63 : Autor(es): Agnew, D.J., G.P. Kirkwood, J. Pearce and J. Clark

Páginas