Search results
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A declining trend in the abundance of Notothenia rossii marmorata and Notothenia gibberifrons observed in fjords in two sites in the South Shetland Islands
de Mayo I., over a period of eight years from 1983 to 1990 and in waters around Half-Moon I., Moon ... by this method did not utilize a consistent amount of effort between years, the analysis made use of standardized ... , King George/25 de Mayo I., over a period of eight years from 1983 to 1990 and in waters around Half ... sampling by this method did not utilize a consistent amount of effort between years, the analysis made use ... ., 1990; Barrera-Oro and Casaux, 1990) where morphometric and meristic data, sex, maturity stages, ages ... yield (MSY) might well take more than two or three decades. REFERENCES BARRERA-ORO, E.R. 1989. Age ... WG-FSA-90/14 A DECLINING TREND IN THE ABUNDANCE ... of eight years from 1983 to 1990 and in waters around Half-Moon 1., Moon Bay, in 1989. The analysis ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 263–274 : Author(s): Barrera-Oro, E. and E. Marschoff
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The Patagonian toothfish (Dissostichus eleginoides) fishery in the Kerguelen Islands (Indian Ocean sector of the Southern Ocean)
eleginoides) have been fished in the Kerguelen Islands zone for 20 years, firstly with trawlers and more ... for 20 years, firstly with trawlers and more recently with longliners. This is the oldest fishery ... to three depth ranges (500–1 000, 1 000–1 500 and >1 500 m); the second also analyses the aver- age size ... , the production model based on the age structure of the population (ASPM) shows that the spawning biomass has ... , J., G. Duhamel, C. Jones and S. Bobko. 2005a. Age, growth and mortality of Patagonian toothfish (Dissostichus ... ‘Kerpêche’ for trawlers (split- years – 1 July to 30 June – 1979/80 to 2000/01) and in Excel tables ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 1–25 : Author(s): Lord, C., G. Duhamel and P. Pruvost
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Otolith microstructure of juvenile mackerel icefish (Champsocephalus gunnari) (Channichthyidae) in the South Georgia area
and daily otolith increments could be used for age differentiation of juvenile fish between consecutive year ... found between fish length and daily otolith increments could be used for age differentiation of juvenile ... year classes arising from spawning in the 1999/2000 and 2000/01 split-years. The mean width of daily ... year class lasted four months. This was estimated based on a retrospective count of daily increments ... for the variation in the published length estimates for fi sh of the same age. Kock (1981) reported the mean ... . For consecutive age groups, differ- ences in published fi sh length estimates are even more evident. The analysis ... in Figures 1, 2 and 3. For age-reading purposes, the Antarctic split- year system was used, in which ... fi rst-year fi sh 5.5–10.4 cm in length at the age of 120–250 days. The length range of fi sh ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 173–181 : Author(s): Shcherbich, L.V
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Archival and satellite-linked data recorders
provides an overview of currently-available data recorders for use in research on marine animals ... . These recorders are deployed on freely swimming animals and gather data on aspects of an animal’'s diving ... animals. These recorders are deployed on freely swimming animals and gather data on aspects of an animal ... data recorders for use in research on marine animals. These recorders are deployed on freely swimming ... animals and gather data on aspects of an animal's diving behaviour. The records can be recovered in one ... la conduite de plongee d'un animal. Les enregistrements peuvent etre recuperes de deux fa~ons ... registradores de datos disponibles actualmente para uso en la investigacion sobre animales marinos. Estos ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 475-493 : Author(s): Hill, R.D.
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A possible framework in which to consider plausible models of the Antarctic marine ecosystem for evaluating krill management procedures
. Movement from another life stage is most easily envisaged for animals moving from one age class ... K aw ag uc hi (2 00 4) W ill ia m s (2 00 4a ) M es op el ag ic s pe ci es ... w it h po or ly u nd er st oo d d yn am ic s (i ) ep i- a nd m es op el ag ic fi sh ... m pl e lif e st ag e bi om as s m od el s, e .g . j uv en ile s, ad ul ts . Ph ill ... paper is concerned with conceptualising an element of the ecosystem to account for the varying qualities ... ecosystem for evaluating krill management procedures Abstract / Description: CCAMLR is developing a ... management procedure for the krill fishery, including the evaluation of candidate management procedures in a ... framework for erecting such models. It discusses the general model requirements and presents a conceptual ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 99–117 : Author(s): Constable, A.J
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Results of Soviet investigations of the distribution and ecology of pelagic squids (Oegopsida) in the Southern Ocean
identified as Brachioteuthis riisei. In recent years (1978-1984) the collection was increased by two or three ... as Brachioteuthis riisei. In recent years (1978-1984) the collection was increased by two or three dozen specimens ... . 125 specimens of that total were identified as Brachioteuthis riisei. In recent years (1978-1984 ... €ce Brachioteuthis riisei. - 80 - Au cours des derni~res a.nnees (1978-1984), la collection s'est ... of the Southern Ocean than all other groups of marine animals which usually occur in this vast region or migrate ... with midwater hauls in the Southern Ocean during studies carried out by the Soviet Union in the years 1965 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 79-111 : Author(s): Lubimova, T.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 ... commonly prescribed, seabird mitigation device in world longline fisheries. This paper reviews CCAMLR ... ) in light of a review of existing literature and available data on the effectiveness of single and paired ... on a voluntary basis according to performance and material standards. Based on the recommendations of this review ... (m) One streamer line: UW IW-50 Two streamer lines: IW-50+Cannon 10 20 30 ... 40 50 60 70 80 90 100 110 D iv es /m in ut ... e 1.40 1.20 1.00 0.80 0.60 0.40 0.20 0.00 Figure 1: Dives per minute of white-chinned petrels ... (2004): 189–201 189 A REVIEW OF THE EFFECTIVENESS OF STREAMER LINES AS A SEABIRD BY-CATCH MITIGATION ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 189–201 : Author(s): Melvin, E.F., B. Sullivan, G. Robertson and B. Wienecke
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Status of the krill stock around Elephant Island in 1991/92 and 1992/93
the austral summers of 1991/92 and 1992/93 are described and compared with information from previous years ... distributions and maturity stage composition reflected relatively good year class success from the 1990/91 ... spawning season but poor success from 1991/92. Year class success from these and other years appears ... salp concentrations during 1992/93 and 1989/90. File: 02loeb-siegel.pdf ... % of the total (Figure 11). These subadults (2+ age class) represent last year's successful juvenile age class ... 4); juveniles (the l + age class) comprised 69% of individuals (Figure 5). Cluster 3 occurred in the western ... to the absence of the small juvenile (l+) age class and the unimodal distribution. Only two clusters were ... the presence or absence of juvenile stages ( l + age class). The overall length frequency distributions from ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 7–33 : Author(s): Loeb, V. and V. Siegel
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Characteristics of krill aggregations in the South Sandwich Islands subarea in January–February 2000
is shown. About 64% of the krill biomass was concentrated in krill swarms in the upper 80 m depth layer ... was concentrated in krill swarms in the upper 80 m depth layer within meander and eddy zones of the Weddell Sea (14 ... (m ) 40 T ot al tr aw l l en gt h al on g to pe na nt (m ) 18 2 T ra w l b ag le ng th ... (m ) 37 M es h si ze in tr aw l b ag (m m ) 6. 5 T ra w l s pe ed (k no ts ... 3 58 1. 5 2 76 3 43 3. 7 57 5 91 7. 4 5 18 1 13 0. 4 T yp es o f k ri ll ag gr ... eg at io n fo rm in g th e d en si ty s tr at um no n- ag gr eg at ed fo rm s sc ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 145–164 : Author(s): Kasatkina, S.M., A.P. Malyshko, V.N. Shnar and O.A. Berezhinsky
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Methods of age determination for mackerel icefish (Champsocephalus gunnari Lönnberg 1905) from the South Georgia Island shelf
of fish longer than 30 cm having an enlarged otolith centre. An age/length key for the third quarter ... of otolith could be used to adjust age assessments of fish longer than 30 cm having an enlarged otolith ... centre. An age/length key for the third quarter of the year was also calculated. ... Paper Title: Methods of age determination for mackerel icefish (Champsocephalus gunnari Lönnberg ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 37–49 : Author(s): Frolkina, Zh.A.