Résultats de la recherche
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Sexing of adult Adélie penguins by discriminant analysis of morphometric measurements
population at Stranger Point (King George/25 de Mayo Is., South Shetland Islands). The sex of each bird had ... Paper Title: Sexing of adult Adélie penguins by discriminant analysis of morphometric ... measurements Abstract / Description: Discriminant analysis of eight morphometric measurements was used to ... determine the sex of Adélie penguins. A sample of 46 adult birds was taken for measurement from the breeding ... breeding population at Stranger Point (King George/25 de Mayo Is., South Shetland Islands). The sex of ... studies it would be necessary to know the sex of penguins on their arrival at the breeding colony. A ... of Adelie penguins at Stranger Point (62°14'S, 58°40'W, King George/25 de Mayo Is., South Shetland ... Warham (1975). They were: flipper length of open wing (FL), flipper breadth at the widest point near the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 543–549 : Auteur(s): Scolaro, J.A., Z.B. Stanganelli, H. Gallelli and D.F. Vergani
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Bias in the estimation of krill yield from using a deterministic formulation of the median unexploited spawning biomass
) the median status of the spawning stock at the end of the projection trial (as a proportion of the ... ) whether the stock became critically depleted in that trial and (ii) the status of the stock at the end of ... Paper Title: Bias in the estimation of krill yield from using a deterministic formulation of the ... parameters and abundance of the stock being assessed. CCAMLR currently uses results from the krill yield ... spawning stock at the end of the projection trial (as a proportion of the median pre-exploitation spawning ... depleted in that trial and (ii) the status of the stock at the end of the trial. These values from all ... and (ii) the median status of the spawning stock at the end of the projection trial (as a proportion ... trial and (ii) the status of the stock at the end of the trial. These values from all trials are used ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 1–8 : Auteur(s): Constable, A.J. and W.K. de la Mare
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New data on spawning, hatching and growth of Champsocephalus gunnari on the shelf of the Kerguelen Islands
each current cohort and the relative abundance of spawners-at-age during each winter spawning period ... Paper Title: New data on spawning, hatching and growth of Champsocephalus gunnari on the shelf of ... part of the Kerguelen shelf during the 1989/90 to 1993/94 period provide new information on the stock ... of Champsocephalus gunnari. A quarterly program of ichthyoplanktonic and bottom trawl surveys over ... each current cohort and the relative abundance of spawners-at-age during each winter spawning period ... , stage 3 (developing) is common at the end of autumn. Post-spawning fish (stage 5) were recorded in the ... summer sample of January 1992 (37 of the 194 specimens analysed, size range: 25 to 35 cm). At the end ... adult fish exceeded immature ones in number, but at a low level of abundance. C. gunnari on the ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 21–34 : Auteur(s): Duhamel, G
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A review of the effectiveness of streamer lines as a seabird by-catch mitigation technique in longline fisheries and CCAMLR streamer line requirements
Paper Title: A review of the effectiveness of streamer lines as a seabird by-catch mitigation ... light of a review of existing literature and available data on the effectiveness of single and paired ... attack or dive rate of multiple southern hemisphere seabird species or foraging guilds as a function of ... : requiring that the streamer line be deployed over the hookline within 100 m of the stern; increasing the ... design of the streamer line, how it is deployed relative to the hookline, and the rate at which gear ... line, and the distance at which hooklines sink beyond the diving range of surface-seizing seabirds (2 ... three treatments, dive rates peaked at 70 m, which is 10 m beyond the aerial extent of the streamer ... 25-02 (2002) standard of a 4.5 m attachment point at reducing white-chinned petrel dives. The ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 189–201 : Auteur(s): Melvin, E.F., B. Sullivan, G. Robertson and B. Wienecke
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Timing of clutch initiation in Pygoscelis penguins on the Antarctic Peninsula: towards an improved understanding of off-peak census correction factors
being conducted at the peak of egg laying. Additionally, the historical literature includes many census ... Paper Title: Timing of clutch initiation in Pygoscelis penguins on the Antarctic Peninsula ... : towards an improved understanding of off-peak census correction factors Abstract / Description: Penguin ... timed relative to the peak of egg laying, and (ii) how nest numbers change through the breeding cycle ... conducted at the peak of egg laying. Additionally, the historical literature includes many census counts ... information relevant to an estimation of the number of breed- ing pairs at a particular site, including the ... regarding penguin populations come from a mix of intensive long-term efforts carried out at a handful of ... monitoring programs that cover a large area, in that the number of sites surveyed comes at the expense of ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 149–165 : Auteur(s): Lynch, H.J., W.F. Fagan, R. Naveen, S.G. Trivelpiece and W.Z. Trivelpiece
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CPUEs, body length and greenness of Antarctic krill during 1987/88 season in the fishing ground north of Livingston Island
Paper Title: CPUEs, body length and greenness of Antarctic krill during 1987/88 season in the ... fishing ground north of Livingston Island Abstract / Description: In order to identify whether or not ... there was a marked change in two kinds of CPUEs, body length and greenness of krill during the fishing ... season, these parameters were examined for each 10-day period of the Japanese krill fishery in the ... essential searching activities (primary searching time of Butterworth, 1988), at least during the co ... WS-KCPUE-89/8 CPUES, BODY LENGTH AND GREENNESS OF ... ANTARCTIC KRILL DURING 1987/88 SEASON IN THE FISHING GROUND NORTH OF LlVINGSTON ISLAND Y. Endo and T ... . Ichii Abstract In order to identify whether or not there was a marked change in two kinds of CPUEs ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 323–338 : Auteur(s): Endo, Y. and T. Ichii
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Characteristics of seasonal variation in diurnal vertical migration and aggregation of Antarctic krill (Euphausia superba) in the Scotia Sea, using Japanese fishery data
Paper Title: Characteristics of seasonal variation in diurnal vertical migration and aggregation ... of Antarctic krill (Euphausia superba) in the Scotia Sea, using Japanese fishery data Abstract ... / Description: Seasonal variation in the diurnal vertical migration and aggregation of Antarctic krill ... ) was highest during the day and lowest at night in autumn and winter in each area, but lower during the ... at night (Figure 2). The pattern of diurnal change in average trawling depth in SG was different ... from that of the other two areas, being deepest during morning twilight and shallowest at dusk from ... (2005): 163–172 163 CHARACTERISTICS OF SEASONAL VARIATION IN DIURNAL VERTICAL MIGRATION AND ... AGGREGATION OF ANTARCTIC KRILL (EUPHAUSIA SUPERBA) IN THE SCOTIA SEA, USING JAPANESE FISHERY DATA K. Taki ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 163–172 : Auteur(s): Taki, K., T. Hayashi and M. Naganobu
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Analysis of krill trawling positions north of the South Shetland Islands (Antarctic Peninsula area), 1980/81–1999/2000
at the beginning of fishing operations each season. In summer, biological factors that affect product ... Paper Title: Analysis of krill trawling positions north of the South Shetland Islands (Antarctic ... Peninsula area), 1980/81–1999/2000 Abstract / Description: Inter- and intra-annual variability of ... commercial krill trawling positions for the 1980/81 to 1999/2000 seasons in the area north of the South ... mature krill, especially at the beginning of fishing operations each season. In summer, biological ... operate at the edge of the distribution, since krill density must be at least high enough to justify ... by the distribution of larger mature krill, especially at the beginning of each fishing season ... CCAMLR Scie~~ce, Vol. 8 (2001): 25-36 ANALYSIS OF ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 25–36 : Auteur(s): Kawaguchi, S. and K. Segawa
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Analysis of changes in biomass of fish stocks in the South Georgia area in 1976/77-1986/87
Paper Title: Analysis of changes in biomass of fish stocks in the South Georgia area in 1976/77 ... the stocks of five fish species (Champsocephalus gunnari, Chaenocephalus aceratus, Pseudochaenichthys ... 1976/77-1986/87. In most of the seasons analysed, the estimates covered a near-bottom layer in about 1 ... /6 of the area of the island shelf. Assessment results point to considerable variations in fish ... although both vessels fished at the same time and on the same fishing grounds. It was partly a result of ... ; strong year classes of 1976, 1977, and 1978 were recruited to the stock. At that time young fish, age ... at a high level of 11.3 and 25 thousand-tons (Table Ill, Figure 3), large fish (exceeding 45 cm and ... . gunnari. In subsequent seasons biomass densities of P. georgianus generally decreased; at the same time ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 185-211 : Auteur(s): Mucha, M. and W. Ślósarczyk
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Changes in biomass of eight species of finfish around the South Orkney Islands (Subarea 48.2) from three bottom trawl surveys
Paper Title: Changes in biomass of eight species of finfish around the South Orkney Islands ... (Subarea 48.2) from three bottom trawl surveys Abstract / Description: Stocks of finfish exploited around ... /90. The biomass of several species of finfish has been monitored through scientific bottom trawl ... surveys within the 500 m isobath of the South Orkney Islands, most recently by the Federal Republic of ... . However, overall levels of biomass indicate very little potential for commercial exploitation at this ... at two stations north of Coronation Island (Figure 4f). Large catches were also taken at another ... potentially the result of low effort directed at finfish in the region after 1982/83 and the final closure ... limit is roughly at 4% of pre- exploitation levels (Kock et al., 1985) around the South Orkney Islands ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 53–74 : Auteur(s): Jones, C.D., K.-H. Kock and E. Balguerías