Résultats de la recherche

1. Quantification of Southern Ocean phytoplankton biomass and primary productivity via satellite observations and biogeochemical models (submitted to the 2008 Joint CCAMLR-IWC Workshop)

   biogeochemical models for the Southern Ocean is presented, with a focus on those models that have been validated ... blooms is presented for the major provinces surrounding Antarctica. Some of the published information ... productivity is presented, focusing on the vertically generalised production model (VGPM) and more recent ... a similar algorithm but with CZCS data (Arrigo et al., 1998). What could be responsible for two ... /06, an interdis- ciplinary survey was conducted of East Antarctica (30°E to 80°E). The suite of ... mechanism for the separation of the two groups. West Antarctic Peninsula Prezelin et al. (2004) documented ... biogeochemical models for the Southern Ocean is presented, with a focus on those models that have been validated ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 247–265 : Auteur(s): P.G. Strutton, N.S. Lovenduski, M. Mongin and R. Matear

2. International CCAMLR applied research and monitoring program, Prydz Bay priority area

   Australia towards the first five years of an International CCAMLR Applied Research and Monitoring Program in ... area Abstract / Description:  An outline is given of a proposed scientific research contribution by ... the Prydz Bay area. Emphasis is placed on the krill based part of the marine community in the Prydz ... Bay area. Some attention is also given to the fish and squid based part of the marine community on the ... for information on feeding throughout the year, the Australian contribution is centred upon shore ... a proposed scientific research contribution by Australia towards the first five years of an ... sharpened, an assessment will be made of the practicability of applying each in the field on both the ... observations. It is planned that there be observers for crabeater seals on early season resupply voyages ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 283-295 : Auteur(s): Australia

3. Estimates of fish stock biomass around South Georgia in January/February 1985

   fishery is dependant on the abundance of the recruiting year class. Conservation measures adopted by ... reduction in stock size to 10 – 20% of that estimated before the onset of heavy fishing. In C. gunnari the ... CCAMLR in 1984 are discussed. Their effect on a recovery of the stocks seems, however, doubtful. File ... direc- t ed fishing for the species for two years on the premises of a normal recruit- ment. Minimum ... recruitment of one or two abundant year - 9 - classes. The dependance of the fishery on the a bund ance ... & BUREAU, 1984, table 50). 3.4 Champsocephalus gunnari Except for one haul yield i ng 1. 4 t/30 min ... in stock size to 10 - 20 % of that estimated for 1975/76. Similar values had, however, been found ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 1-32 : Auteur(s): Kock, K.-H.

4. Population genetic structure of Patagonian toothfish in the West Indian Ocean sector of the Southern Ocean

   Marion (n = 2) Islands were typed using two fragments of mitochondrial DNA (mtDNA) and seven nuclear ... on minor allele frequency differences) at three microsatellite loci among the four collections ... for haplotype diversity according to Nei (1987), is the probability that two randomly chosen ... differentia- tion). The overall mtDNA results did not provide any evidence for an association between geo ... fi sh had been at liberty for 0.7 to 3.8 years, demonstrating that under some circumstances D ... observers on board commercial vessels fi shing legally for D. eleginoides around the Kergue- len, Crozet ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 21–32 : Auteur(s): Appleyard, S.A., R. Williams and R.D. Ward

5. Marine debris and fishing gear associated with seabirds at sub-Antarctic Marion island, 1996/97 and 1997/98: in relation to longline fishing activity

   debris found in association with seabirds at sub-Antarctic Marion Island for the period May 1996 to April ... ; (non-fishing) marine debris over this period. Sixty 'rope nooses' apparently used for ... . There are probably two reasons for the comparatively low number of SBT longline hooks found on Marion ... an anonymous reviewer for comments on earlier drafts of this paper. REFERENCES Ashford, J.R ... Prince, 1996). Both unregulated and sanctioned longline fishing for Patagonian toothfish within the 20 ... and B. Watkins, pers. comms). Large body size is also an advantage in the intense competition for ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 85–96 : Auteur(s): Nel, D.C. and J.L. Nel

6. Fish stock assessment survey in Subarea 48.3

   reduction. No commercial fishing on Champsocephalus gunnari has been reported from the area. It is suggested ... previous year and is not an artefact of the sampling technique or survey design. 30 Further evidence ... frequency of 30 kHz was used for bottom detection and a Koden 'Chromascope' operating at 48 kHz was used to ... the stations where it was caught, the catch rates of C. gunnari were less than 200 kg for a 30 minute ... the same method as used in SC-CAMLR (1990a). The data were stratified by depth zone and for the two ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 25–67 : Auteur(s): Everson, I., G. Parkes, K.-H. Kock, S. Campbell, Z. Cielniaszek and J. Szlakowski

7. Distribution and size–age composition of Antarctic krill (Euphausia superba) in the South Orkney Islands region (CCAMLR Subarea 48.2).

   +; modal length 25–30 mm) and 2-year-old krill (age 2+; modal length 40–45 mm); the 3-, 4- and 5-year-old ... Southern Ocean indi- cates that there are two ways for krill to enter the South Orkney Islands area: ACC ... + 3+ 4+ 5+ 2 3 4 5 6 7 2 3 4 5 6 Size–age groups (a) % 20 10 0 –10 –20 –30 29–30 31–32 ... % 70 % 60 % 50 % 40 % 30 % 20 % 10 % 0% 10 0% 90 % 80 % 70 % 60 % 50 % 40 % 30 % 20 % 10 ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 123–134 : Auteur(s): Sologub, D.O. and A.V. Remeslo

8. Age estimation and maturity of the ridge-scaled macrourid (Macrourus whitsoni) from the Ross Sea

   work on this species. Von Bertalanffy growth models assuming different growth by sex and by year-within ... test. Von Bertalanffy parameters for the pooled dataset with unsexed juveniles are L ∞ 76.12, K 0.065 ... and t 0 –0.159 for males and L ∞ 92.03, K 0.055 and t 0 0.159 for females. Revised estimates of the ... presented for males and females respectively, using a reduced probit model. File:  13marriott-etal.pdf ... and 30 years old in the second reading. Males Females 0 10 20 30 ... otolith. For each preparation method, the number of fully- formed translucent zones present, an estimate ... parameter. Two likelihood-ratio tests were carried out. The full model for each test assumed separate ... parameters by year and sex. The reduced model for each test assumed separate parameters by sex only. The ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 291–303 : Auteur(s): Marriott, P.M., M.J. Manning and P.L. Horn

9. Age and growth of the Antarctic skate (Amblyraja georgiana) in the Ross Sea

   ages at maturity of 6–7 years for males and 8–11 years for females. These estimates are near the middle ... no obvious difference in growth between the sexes, so the von Bertalanffy curve for both sexes ... estimated lengths at maturity for males and females (64 and 66–69 cm PL respectively) produced estimated ... to upper end of the range of ages at maturity for skates worldwide. The results of this study are ... and capture. An increase of 0.5 years for all age estimates would move the growth curve suffi ... lengths of 4.3 and 4.6 mm compared with an expected length of about 8 mm. Possible explanations for this ... le ng th (c m ) Francis and Ó Maolagáin 190 The growth curves for the two sexes were simi ... growth rates vary by sex. The von Bertalanffy growth curve for the two sexes combined therefore ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 183–194 : Auteur(s): Francis, M.P. and C. Ó Maolagáin

10. Otolith and body size relationships in the mackerel icefish (Champsocephalus gunnari)

    measured and weighed and their effectiveness as predictors of fish length and fish mass determined. The two ... regression model allowing for parallel lines for each year (F4.846 = 30.57, p < 0.001); including extra ... parameters for separate slopes for each year did not give a statistically significant improvement to the ... parallel lines for each year (F4889 = 36.7, p < 0.001); including extra parameters for separate slopes ... for each year did not give a statistically significant improvement to the fit (F4.889 = 1.85, p ...

    Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 117–123 : Auteur(s): Everson, I., B. Bendall and A. Murray

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