Résultats de la recherche
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Review of length-weight relationships for Antarctic krill
Paper Title: Review of length-weight relationships for Antarctic krill Abstract / Description ... euphausiid species), are listed for ash-free dry weight, dry weight, and wet weight. The accuracy of length ... taken into account. The influence of seasonal changes on length-weight relationship parameters is ... discussed. Recommendations for possible uses of reviewed length-weight relationships are presented. File ... euphausiids. Most length measurements were made using total length AT (front of the eye to the tip of the ... WG-KRILL-92/1S REVIEW OF LENGTH-WEIGHT RELATIONSHIPS ... weight, dry weight, and wet weight. The accuracy of length-weight relationship calculations is improved ... when information on sex and dominant maturity stages is taken into account. The influence of seasonal ...
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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Discrimination of Macrourus whitsoni and M. caml (Gadiformes, Macrouridae) using otolith morphometrics
Paper Title: Discrimination of Macrourus whitsoni and M. caml (Gadiformes, Macrouridae) using ... otolith morphometrics Abstract / Description: That the predominant by-catch of grenadier by the toothfish ... fishery in the Ross Sea region is comprised of two species, rather than being solely Macrourus whitsoni ... , was recognised in 2010 with the identification of a new species, M. caml. Grenadier are the main by ... species of grenadier in the Ross Sea region means that, at the time of writing, there are insufficient ... of grenadier otoliths from the Ross Sea fishery pres- ently stored at NIWA, Wellington, New Zealand ... by the length of the longlines in the toothfish fishery, i.e. 5–10 km. At this scale of sam- pling ... outside of the otolith each year (Figure 5). While M. whitsoni approaches full size at about 17 years ...
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
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The Soviet krill fishery in the Atlantic Sector of the Antarctic from 1977 to 1991: fishing effort distribution and interannual patterns
Paper Title: The Soviet krill fishery in the Atlantic Sector of the Antarctic from 1977 to 1991 ... fishery in the Atlantic Sector of the Antarctic from 1977 to 1992 are discussed. The total fishing effort ... from 1977 to 1991 was 50 086 vessel-days fished, in Subareas 48.3 (45% of the total for the period ... ), 48.2 (36%) and 48.1 (19%). Three distinct patterns in the distribution of monthly fishing effort ... atmospheric pressure at sea level were used, each value representing an area of 5° latitude x 10° longitude ... types in use at that time. A detailed description of different vessel types is given in The Fleet of ... distribution for several years at a time: the three major patterns in the distribution of fi shing effort ... of krill taken in 1–2 hauls during the day and 10–20 tonnes in 3–4 hauls at night. In January 1983 ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 1–13 : Auteur(s): Litvinov, F.F., V.A. Sushin, G.A. Chernega and O.A. Berezhinsky
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Length-based assessments revisited – why stock status and fishing mortality of long-lived species such as toothfish cannot be inferred from length-frequency data alone
Paper Title: Length-based assessments revisited – why stock status and fishing mortality of long ... / Description: In many of CCAMLR’s new and exploratory fisheries, stock assessment techniques are still in ... development. The failure of the tag-recapture program to provide robust assessments in many areas and doubts ... and fishing mortality from length-frequency data alone. In this paper, a number of length-based stock ... over two or three decades (Constable et al., 2000). At the core of this approach are rules for ... the length at first capture Lc and an esti- mate of L∞ are required. In addition to steady-state ... of weight-at-age and numbers-at-age under zero fish- ing mortality is maximised. Cope and Punt ... could theoretically be fished at a target spawning biomass of 40% relative to an unfished population ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 57–73 : Auteur(s): Ziegler, P.E., D.C. Welsford and A.J. Constable
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The Patagonian toothfish (Dissostichus eleginoides) fishery in the Kerguelen Islands (Indian Ocean sector of the Southern Ocean)
(Indian Ocean sector of the Southern Ocean) Abstract / Description: Patagonian toothfish (Dissostichus ... recently with longliners. This is the oldest fishery targeting D. eleginoides in the Indian Ocean sector of ... local overfishing. The expansion of the bathymetric range of the fishery to increasingly deeper waters ... distribution, timing and area of spawning, and movements between geographical sectors) on the adult section of ... repro- duction cycle) against length of fish. The size-at- sexual-maturity is taken as being the length ... at which 50% of fish are at stages 3 to 5. This calcula- tion was made for the 2003/04 data and for ... recent fishing years. Indeed, it was about 4 tonnes/hour at the begin- ning of the 1990s and was, at the ... ), there is an optimum depth (between 800 and 1 400 m) at which to fish to catch the greatest number of ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 1–25 : Auteur(s): Lord, C., G. Duhamel and P. Pruvost
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Fishing for toothfish using pots: results of trials undertaken around South Georgia, March–May 2000
Paper Title: Fishing for toothfish using pots: results of trials undertaken around South Georgia ... , March–May 2000 Abstract / Description: During the period March to May 2000, the UK undertook trials of ... commercial viability of this fishing method for toothfish fisheries in the CCAMLR Convention Area. While the ... method successfully caught D. eleginoides, there was a large by-catch of crab species. The catch rate of ... , mostly at the start of the trials, before the correct gear and methodology had been established. Bait ... . The number and percentage of female Pnrnlornis crabs at different maturity stages are shown in Table ... examine alternative pot designs and methods of increasing toothfish catch rates at the same time as ... possibility of retaining legal-sized crab by-catch and fishing at all times of the year. This is possible ...
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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Physical oceanographic setting of the Siedlecki January 1987, South Shetland Island data set
Paper Title: Physical oceanographic setting of the Siedlecki January 1987, South Shetland Island ... data set Abstract / Description: In the vicinity of the northern tip of the Antarctic Peninsula, the ... water from the Pacific Ocean. A series of fronts form which are collectively referred to as the Weddell ... Scotia Sea water by a zone of varied width (10 to 100 km) of water which can best be considered as ... Ocean, the better we appreciate the extent of its variability, at a variety of scales (Gordon, 1988 ... at the surface between stations 214 and 217 is quite strong, though the temperature expression of ... the front at the immediate surface is nearly absent. South of the front a warm-saline layer is ... Weddell continental margin water advected into the area. The scatter of points at temperatures below -0.5 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 161-184 : Auteur(s): Gordon, A.L.
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Acoustic estimates of krill biomass in the Elephant Island area: 1981–1993
Paper Title: Acoustic estimates of krill biomass in the Elephant Island area: 1981–1993 Abstract ... / Description: Acoustic estimates of krill biomass in the vicinity of Elephant Island are presented for the ... years 1981 to 1993 (with the exception of 1982 and 1986). Estimates for 1981 to 1991 are based on ... previous reports adjusted for the recently proposed definition of krill target strength (Greene et al ... Demer At the 1992 meeting of the CCAMLR Working Group on Krill (WG-Krill) a table of historical ... 1985. Klindt used the BIOMASS (1986) definition of target strength at 120 kHz adjusted to 150 kHz ... corresponding to the difference in target strength at 120 kHz using the modal krill lengths for each of the ... corresponding to the difference between the BIOMASS (1986) definition of target strength at 50 kHz and a ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 1–5 : Auteur(s): Hewitt, R.P. and D.A. Demer
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Distribution and size–age composition of Antarctic krill (Euphausia superba) in the South Orkney Islands region (CCAMLR Subarea 48.2).
Paper Title: Distribution and size–age composition of Antarctic krill (Euphausia superba) in the ... composition and biological condition of Antarctic krill (Euphausia superba) caught by the Russian krill ... distribution of size–age groups in association with particular water masses indicated that age 2+ krill ... dominated in cold Weddell Sea waters in the southern parts of the fishing area, while older age classes (3 ... composition of krill differed between 2009 and 2010 (Figure 6). In early January 2009, pre-spawning krill at ... stage VII in March (Figure 7b). Females at stage IV in January comprised less than 5% of all females ... an earlier stage of maturity than females. The pro- portion of males at stage IV decreased from about ... . Melnikov and Spiridonov (1996) reported consid- erable densities of E. superba larvae at older fur- cilia ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 123–134 : Auteur(s): Sologub, D.O. and A.V. Remeslo
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Distribution and population structure of Dissostichus eleginoides and D. mawsoni on BANZARE Bank (CCAMLR Division 58.4.3b), Indian Ocean.
Paper Title: Distribution and population structure of Dissostichus eleginoides and D. mawsoni on ... composition, sex ratio and sexual maturity of Dissostichus eleginoides and D. mawsoni from BANZARE Bank were ... shallower banks (<1 000 m), while D. mawsoni was caught on deeper slopes (>1 500 m). Separation of the ... two species by depth may be related to physical intolerance to cooler temperatures because of the lack ... . eleginoides at depths ranging from 140 to 1 460 m and at tem- peratures in the near-bottom layer of 1.0–2.2°C ... noides) at South Georgia. Mar. Biol., 155 (5): 493–503. CCAMLR. 2006. Scheme of International ... seamounts, between 50 and 60°S, and on the Patagonian Shelf and the southern coast of Chile to 30°S ... POPULATION STRUCTURE OF DISSOSTICHUS ELEGINOIDES AND D. MAWSONI ON BANZARE BANK (CCAMLR DIVISION 58.4.3B ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 145–153 : Auteur(s): Taki, K., M. Kiyota, T. Ichii and T. Iwami