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Composition and characteristics of ichthyofauna in pelagic waters of South Georgia (Subarea 48.3)
(Subarea 48.3) Abstract / Description: This paper presents the results of randomly stratified pelagic ... studying the vertical migrations of some of the most abundant species were carried out during the six ... pelagic surveys. Horizontal distribution and length composition of fish, as well as the comparative ... distribution of krill and juvenile Champsocephalus gunnari were studied. The pelagic component of the ... . The trawl was hauled on board after towing in each of these depth layers. Two to three series of ... , increased during the day and approached its maximum level by the end of the day before decreasing again ... and the eastern end of South Georgia at depths up to 200 m where dense concentrations of juveniles ... ) 5 Dmitry Donskoy St. Kaliningrad 236000, Russia Abstract This paper presents the results of ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 125–164 : Автор(ы): Frolkina, G.A., M.P. Konstantinova and I.A Trunov
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Variations in condition indices of mackerel icefish at South Georgia from 1972 to 1997
1997 Abstract / Description: Mackerel icefish (Champsocephalus gunnari) are widespread on the South ... Georgia shelf, Antarctica, and have been fished commercially since the early 1970s. They are known to feed ... predominantly on krill. An index of condition which uses the ratio of the measured total mass to the estimated ... mass is shown to provide a good indicator of local krill density. The index is likely to be little ... 40°W and 44"W. The series of data have been grouped by month, beginning in August 1972 and ... [~s gzrnnnvi) are widespread on the South Georgia shelf, Antarctica, and have been fished ... commercially since the early 1970s. They are known to feed predominantly on krill. An index of condition which ... uses the ratio of the measured total mass to the estimated mass is shown to provide a good indicator ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 119–132 : Автор(ы): Everson, I. and K.-H. Kock
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Seal mitigation measures on trawl vessels fishing for krill in CCAMLR Subarea 48.3
Abstract / Description: At the 2004 meeting of the Working Group on Ecosystem Monitoring and Management ... (WG-EMM) in Siena, Italy, the UK reported on the by-catch of fur seals (Arctocephalus gazella) in the ... avoid fur seal deaths in the fishery. WG-EMM requested that the UK provide further details of the ... methods employed for consideration by the ad hoc Working Group on Incidental Mortality Arising from ... net rather than the roof. After this modifi cation, no further captures were reported. The vessel ... constructed from 140 mm polypropylene mesh and was positioned immediately after the escape opening. This ... . Table 2: Seal entanglements before and after application of mitigation measures. The values in brackets ... Street, London W1J 5PN United Kingdom Email – j.hooper@mrag.co.uk Abstract At the 2004 meeting of the ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 195–205 : Автор(ы): Hooper, J., J.M. Clark, C. Charman and D. Agnew
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CCAMLR ecosystem monitoring and a feedback management procedure for krill
/ Description: The CCAMLR Ecosystem Monitoring Program has been developing a technique which might detect short ... attributable to loss of prey through fishing activities. The principal fishery in the CCAMLR Convention Area is ... the krill fishery and this paper examines ways in which the information being obtained from the ... before fishing begins as well as after it has begun. This is known as the 'Before-After-Control Impact ... larger) after fishing begins. Further, the ability to determine the effects of fishing could be ... (iii) it is feasible. WG-CEMP now has the data available to begin examining, using analytical and ... FEEDBACK MANAGEMENT PROCEDURE FOR KRILL A.J. Constable* Abstract The CCAMLR Ecosystem Monitoring ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 345–350 : Автор(ы): Constable, A.J.
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Australian research on Antarctic bird and seal diets
data on the diets of important vertebrate predator species in Prydz Bay and around the sub-Antarctic ... Heard and Macquarie Islands have been collected during the last seven years. Published and unpublished ... cantered the CCAMLR Ecosystem Monitoring Programme's priority study area, Euphausia superba forms a ... rather low proportion of the diet of most vertebrate predators. Euphausia crystallorophias and the fish ... the first week after chick hatch, but declined to 10% by the 4th week and never subsequently exceeded ... 55% by week 5 after chick hatch. E. superba increased from about 15% to about 45% in the same period ... BIRD AND SEAL DIETS R. Williams Abstract Many data on the diets of important vertebrate predator ... species in Prydz Bay and around the sub-Antarctic Heard and Macquarie Islands have been collected during ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 231-249 : Автор(ы): Williams, R.
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[node:field-journal-volume]:37-51
length classes at which the fi sh were maturing occurred at the lower end of the size range of fi sh ... . rupestris adopts a benthopelagic lifestyle after its fi rst year in the Skagerrak Sea and juveniles are ... . 10 (2003): 37–51 37 SPECIES IDENTIFICATION AND AGE ESTIMATION FOR THE RIDGE-SCALED MACROURID ... (MACROURUS WHITSONI) FROM THE ROSS SEA P. Marriott National Institute of Water and Atmospheric Research ...
Science Journal Paper : 37–51
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Factors to consider in developing management measures for krill
/ Description: A brief review of the objectives of the Convention for the Conservation of Antarctic Marine ... Living Resources is given along with an outline of steps for the evolution of management procedures for ... management, modelling, indicator species, pulse fishing, and the use of open and closed areas and seasons are ... Reactive management is the practice of implementing conservation measures only after the need for them is ... . For example, recruitment can only be shown to have become unstable (Le., declined) well after the ... after the event. This may lead to a delay, or even a failure, in reaching consensus that management ... existing after that time would be perfect, but that it would be adequate for meeting the basic objectives ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 175–187 : Автор(ы): de la Mare, W.K.
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Southern elephant seals and CCAMLR
research findings of primarily South African (including some French and Australian results) studies on the ... southern elephant seal (Mirounga leonina) in the Kerguelen province of the Southern Ocean. Sub-populations ... studies during the animals’ terrestrial phase have failed to explain this observed decline which has also ... been recently confirmed for the Macquarie Island stock. The availability of food, competition with ... seals appear to spend most or their summer reasonably close to the island after attaining nutritional ... ther~fore at or after the growth spurt associated with puberty in the male show a southward ... primarily South African (including some French and Australian results) studies on the southern elephant ... seal (Mirounga leonina) in the Kerguelen province of the Southern Ocean. Sub-populations of this ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 465-473 : Автор(ы): Bester, M.N. and D.G.M. Miller
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A von Bertalanffy growth model for toothfish at Heard Island fitted to length-at-age data and compared to observed growth from mark–recapture studies
aged. Subsampling of random lengthfrequency (LF) data used to obtain the samples of fish for ageing ... used length-bin sampling involving a fixed sample size per bin. Estimation of the VB parameters used a ... definition of the likelihood function based on variable probability (VP) sampling due to the prespecified ... length-dependent selectivity function for trawl fishing and the additional effect of length-bin sampling ... after 175 days and 270 before 20 days at liberty. The median value of days-at-liberty was 163. Only ... with respect to (θ, σ) after extending the notation in an obvious way ... sh that were aged. Subsampling of random length- frequency (LF) data used to obtain the samples of fi ... sh for ageing used length-bin sampling involving a fi xed sample size per bin. Estimation of the VB ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 43–66 : Автор(ы): Candy, S.G., A.J. Constable, T. Lamb and R. Williams
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Status of krill target strength
Paper Title: Status of krill target strength Abstract / Description: Empirical estimates for the ... measurements, namely thresholding. Theoretical estimates for the target strength are derived from the deformed ... is an empirical basis. The theoretical estimates show a non-monotonic dependence of target strength ... high signal-to-noise-ratio conditions, are consistent with the general pattern. Several specific ... end of the eye to the tip of the telson. When the length is not defined in the cited data source, it ... sonar will be most able to record it. However, at or near end-on incidence, the echo is quite weak ... end-on incidence may be below the noise level or "detection threshold" of the sonar, hence the echo ... . The modal-series-based solution used in this work is not valid for end-on or near end-on incidence ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 101–126 : Автор(ы): Foote, K.G., D. Chu and T.K. Stanton
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