Résultats de la recherche
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The Kerguelen database
Paper Title: The Kerguelen database Abstract / Description: A database for fishery statistics ... and biological data for the Kerguelen EEZ has been operating in France since 1979. At the end of the ... representation of these data is presented for several parameters including a distribution of the fishing effort ... . Length frequency distributions of the species are also provided for the period 1979/80–1985/86. File: 02 ... of the trawl on the Kerguelen Shelf and surrounding banks for two periods. 1,6.30 + Period ... surrounding banks for two periods. Seasonal position of the trawl on the Kerguelen shelf and surrounding ... effort is represented in an artificial map (see Figure 2) where the total trawl number is plotted for ... (Catch Per Unit Effort) for the whole area are shown in Figures 6 and 7. Two peaks can be seen in the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 23-54 : Auteur(s): Duhamel, G.
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Estimating krill recruitment and its variability
for 2+ krill (the ratio of the number of two-year-old krill to the number aged two and above) from ... rate for 1+ krill (the ratio of the number of krill aged one year to the number of krill aged one year ... likelihood method is developed for the decomposition of krill density-at-length data into the proportion of ... and above) of 0.339 with a standard deviation (SD) of 0.100. The corresponding result for recruitment ... with R(t) estimated for both putative one- and two-year-old age classes. above data, and four age ... classes in fitting to two- densities for each length calculated using year-old and above. equation (6 ... two-year-old krill to the number aged two and above) from nine surveys is 0.552 with a standard ... estimated in fitting the model, and ensures an orderly relationship between the variance estimated for ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 55–69 : Auteur(s): de la Mare, W.K
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Biomass, abundance and distribution of fish in the Kerguelen Islands EEZ (CCAMLR Statistical Division 58.5.1)
stratified stations. Estimates of biomass and abundance were produced for eight commercial species. The total ... biomass was 245 000 tonnes and Patagonian toothfish (Dissostichus eleginoides) accounted for half of the ... , their biomass during the period between the two surveys. In addition to the commercial species ... distribution of species, commercial or not, that are important in the ecosystem and are of major interest for ... for L. squamifrons for the two deep-sea strata (north – 396–22 344 tonnes for an estimated abun ... from 6 September to 9 October 2006 (with two stations on 19 and 20 October 2006) in the whole area of ... ). Such concentrations were stable for the two successive years of the survey. The long-term sta- bility ... for adult N. rossii (Chechun, 1984; Duhamel, 1987a), could also have an effect on the stock. There ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 1–32 : Auteur(s): Duhamel, G. and M. Hautecoeur
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Identifying taxonomic groups vulnerable to bottom longline fishing gear in the Ross Sea region
the fishery being assessed. New Zealand identified an interim list of taxa to monitor in fishery by ... -catch in the Ross Sea as part of its benthic fisheries impact assessment. The rationale for including or ... , including two indicator-only taxa. File: 05parker-bowden.pdf ... , which is dependent on the structuring organisms. To provide a scientific basis for developing an ... : (L = <10 years; M = 10–30 years; H = >30 years) Growth rate: (L = mature <10 years; M = mature 10–20 ... years; H = mature >30 years or evidence for sporadic recruitment events) Fragility: (L = Flexible ... live longer than the 30 years estimated for more shal- low species (McFadden, 1991; Cordes et al ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 105–127 : Auteur(s): Parker, S.J. and D.A. Bowden
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Breeding numbers and success of Eudyptes penguins at Marion Island, and the influence of mass and time of arrival of adults
penguins (Eudyptes chrysolophus) over 26 years, as there was also for eastern rockhopper (E. chrysocome ... mass of chicks at fledging. For both species, mass on arrival of males was significantly correlated ... Oscillation event of 1997/98, there was no significant correlation in mass on arrival between the two species ... breeding. For both species the time of arrival of females for breeding, and for rockhopper penguins the ... Marion Island Trypot Hole than at the other two colonies. Over the 20-year period, it averaged 0.49 ... relationship between the two parameters for rockhopper penguins. However, for macaroni penguins, in years of ... Huin, 2003; Puetz et al., 2003). For some of these decreases, an altered availability of food brought ... usually intermediate between levels recorded at the other two colonies. Over the 26-year period ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 175–190 : Auteur(s): Crawford, R.J.M., B.M. Dyer, J. Cooper and L.G. Underhill
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Otolith microstructure of juvenile mackerel icefish (Champsocephalus gunnari) (Channichthyidae) in the South Georgia area
comprised two year classes arising from spawning in the 1999/2000 and 2000/01 split-years. The mean width of ... increments. TL varied from 5.5 to 10.4 cm for fish in their first year (120–250 days) to 12.5–13.3 cm in 1 ... 2001/02 year class lasted four months. This was estimated based on a retrospective count of daily ... ) to 2.8 μm at 500 days (TL 13.1 cm). The pelagic stage of egg incubation development for fish of the ... survey of juveniles in February–March 2002 on the South Georgia shelf. Juvenile fi sh comprised two year ... the 1999/2000 (5 speci- mens) and 2000/01 (20 specimens) split-years. The 1999/2000 year class ... 500 days (TL 13.1 cm). The pelagic stage of egg incubation development for fi sh of the 2001/02 year ... varied from 5.5 to 10.4 cm for fi sh in their fi rst year (120–250 days) to 12.5–13.3 cm in 1-year-old ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 173–181 : Auteur(s): Shcherbich, L.V
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Fitting Euphausia superba into Southern Ocean food-web models: a review of data sources and their limitations
of each method of sampling krill, i.e. with nets (for historical time series, demographic information ... the benthos have fundamental implications, both for assessing biomass and for modelling the food web ... . Growth in spring, summer and autumn is now fairly well quantified, but mortality remains an enigma. We ... southwest (SW) Atlantic sector is a major scale of variability, driven by sea-ice and climate effects on ... first is the underside of sea-ice – an important habitat for krill year-round (Brierley et al., 2002 ... occurred year- round throughout Antarctica, and regularly with an estimated ~20% of the stock deeper than ... ) method has been in use for 20 years but there have been various attempts to use other analytical ... interchangeably. At an interannual scale, the two measures do not scale linearly, so interan- nual trends in mean ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 219–245 : Auteur(s): A. Atkinson, S. Nicol, S. Kawaguchi, E. Pakhomov, L. Quetin, R. Ross, S. Hill, C. Reiss, V. Siegel, G. Tarling (submitted to the 2008 Joint CCAMLR-IWC Workshop)
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Analysis of krill trawling positions north of the South Shetland Islands (Antarctic Peninsula area), 1980/81–1999/2000
effect on trawling positions. Ice conditions for recent fishing periods were also demonstrated to have an ... commercial krill trawling positions for the 1980/81 to 1999/2000 seasons in the area north of the South ... quality, such as salp abundance and the proportion of green krill, also seemed to have an increasing ... operations concentrated on the outer shelf in the early 1980s, along the shelf slope in the mid to late 1980s ... seemed to have an increasing effect on trawling positions. Ice conditions for recent fishing periods ... . ACKNOWLEDGEMENTS We would like to thank Denzil Miller and Robin Ross for their critical comments 011 an earlier ... from fishing vessels, the reasons for changing fishing grounds in January of these years were either ... these two years showed unusual patterns. In 1990/91 most trawling positions were located from the ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 25–36 : Auteur(s): Kawaguchi, S. and K. Segawa
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Estimating unaccounted fishing mortality in the Ross Sea region and Amundsen Sea (CCAMLR Subareas 88.1 and 88.2) bottom longline fisheries targeting Antarctic toothfish
counted in estimates of total fishing removals or otherwise accounted for in stock assessment models. The ... average 208 tonnes of Antarctic toothfish mortality may be unaccounted for annually. While the current ... incorporated as sensitivity analyses in the 2011 stock assessments for the Ross Sea region and Subarea 88.2 ... / Description: Stock assessments rely on estimates of total mortality resulting from fishing activities ... data were then used to estimate hook loss for the entire area on an annual basis and sep- arately for ... gear was used for this analysis. There is also an ‘other hooks lost’ field, which reports ‘hooks lost ... that it was highly unlikely that an individual vessel operating in the Ross Sea region could fish for ... from the analysis. If a vessel reported any non-zero value for lost hooks in any year, then any ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 17–30 : Auteur(s): Webber, D.N. and S.J. Parker
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Brief report of the joint Soviet-Australian expedition of the USSR FRV Professor Mesyatsev to the Australian fishing zone around the territory of Heard and McDonald Islands, May-August, 1987
Heard were favourable for the formation of commercial aggregations of Champsocephalus gunnari during the ... not less than two months previously). The maturity of these fish was assigned to stage VI-III for ... , Beverton and Holt model for the Kerguelen Archipelago Shelf population of C. gunnari which equals 30 ... ), and 26 bottom trawls were made in an area on the Heard Island shelf where an accumulation of ... . Environmental conditions of the shelf area of Heard were favourable for the formation of commercial ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 75-103 : Auteur(s): Gherasimchook, V.V., V.N. Brodin, A.V. Kljausov, I.B. Russelo, P.V. Tishkov and N.B. Zaremba