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Experimental evaluation of the effectiveness of weighting regimes in reducing seabird by-catch in the longline toothfish fishery around South Georgia
of experiments was carried out in February 1999 at South Georgia (Subarea 48.3) to examine the ... used. Therefore to minimise seabird by-catch, line-weighting regimes of at least 8.5 kg at 40 m ... Paper Title: Experimental evaluation of the effectiveness of weighting regimes in reducing ... effects of different weighting regimes on the incidental mortality of birds caught on longlines fishing ... Abstract A series of experiments was carried out in February 1999 at South Georgia (Subarea 48.3) to ... when 12.75 kg was used. Therefore to minimise seabird by-catch, line-weighting regimes of at least 8.5 ... Conservation Measure 29/XVI (CCAMLR, 1999). This measure requires the setting of longlines only at night ... required by the conservation measure (6 kg at 20 m intervals) was derived from a study of bird strikes in ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 119–131 : Автор(ы): Agnew, D.J., A.D. Black, J.P. Croxall and G.B. Parkes
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Differentiation of independent populations of Antarctic krill
-populations is expected to correspond with the number of quasi-stationary cyclonic water circulations. At ... present, at least six stable cyclonic water circulations can be found and at least two or three of them ... Paper Title: Differentiation of independent populations of Antarctic krill Abstract / Description ... : Several countries have recently shown an interest in commercial krill fishing. An understanding of krill ... expected to correspond with the number of quasi-stationary cyclonic water circulations. At present, at ... least six stable cyclonic water circulations can be found and at least two or three of them may be ... recent data it thus appears that there are at least six cyclonic circulations in the Southern Ocean of ... absence of larvae at great depths in winter was established, the dominant role of horizontal circulation ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 275-281 : Автор(ы): USSR
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Is current management of the Antarctic krill fishery in the Atlantic sector of the Southern Ocean precautionary?
excessive concentration of catch at the subarea scale. Finer-scale management might be necessary to manage ... Paper Title: Is current management of the Antarctic krill fishery in the Atlantic sector of the ... Southern Ocean precautionary? Abstract / Description: This paper explains the management of the Antarctic ... krill (Euphausia superba) fishery in the Atlantic sector of the Southern Ocean, and current knowledge ... of the regional biomass in recent years. This suggests that fishing at the trigger level would be ... limits help prevent excessive concentration of catch at the subarea scale. Finer-scale manage- ment ... probability of the spawning stock biomass falling to 20% of the reference level at any time should be no ... in deeper waters and have been recorded at the seabed to depths of 3 500 m (Clarke and Tyler, 2008 ...
Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 31–51 : Автор(ы): Hill, S.L., A. Atkinson, C. Darby, S. Fielding, B.A. Krafft, O.R. Godø, G. Skaret, P.N. Trathan and J.L. Watkins
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Evidence to support the annual formation of growth zones in otoliths of Antarctic toothfish (Dissostichus mawsoni)
translucent zone is formed annually in otoliths of juvenile D. mawsoni. Mean fish lengths at ages 0.5, 1.5 ... Paper Title: Evidence to support the annual formation of growth zones in otoliths of Antarctic ... annually in the otoliths of this species. However, no evidence to validate this assumption has previously ... estimates agree with growth curves calculated previously from a sample of data that was large but lacked any ... been at liberty from 1 to 7 years. The number of zones between the fl uorescent oxytetracycline line ... microscope at ×25 and ×40 magnifi cation. The number of complete translucent (dark) zones was counted and ... ventral sides of the section. The reader was not aware of fi sh length or otolith weight at the time ... colour photographs were taken of each section. Each pair was of the same portion of the section, at ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 125–138 : Автор(ы): Horn, P.L., C.P. Sutton and A.L. DeVries
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Moulting interval and growth of juvenile Antarctic krill fed different concentrations of the diatom Phaenodactylum tricornutum in the laboratory
Paper Title: Moulting interval and growth of juvenile Antarctic krill fed different ... concentrations of the diatom Phaenodactylum tricornutum in the laboratory Abstract / Description: Juvenile ... Antarctic krill (Euphausia superba) were fed Phaenodactylum tricornutum, at concentrations ranging from 0.0 ... –5.0 mgC 1 –1. Intermoult period (IP) decreased, but an increment of body length per moult (∆BL) of ... OF JUVENILE ANTARCTIC KRILL FED DIFFERENT CONCENTRATIONS OF THE DIATOM PHAENODACTYLUM TRICORNUTUM IN ... superba) were fed Phaeodactylum tricornutum, at concentrations ranging from 0.0-5.0 mgC 1 1. Intermoult ... period (IP) decreased, but an increment of body length per moult (6BL) of juvenile krill increased, up ... to a concentration of 1.0 mgC 1-1 • No further effect of food concentrations on IP or 6BL was seen ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 223-225 : Автор(ы): Ikeda, T. and P.G. Thomas
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Status of the coastal stocks of Dissostichus spp. in East Antarctica (Divisions 58.4.1 and 58.4.2)
explores several methods for arriving at estimates of sustainable yields. Biological data suggest that ... between them being at about 90°E. The western stock may be centred around Prydz Bay, and appears to be of ... Paper Title: Status of the coastal stocks of Dissostichus spp. in East Antarctica (Divisions ... operating off the coast of East Antarctica (30°E–150°E; FAO/CCAMLR Divisions 58.4.1 and 58.4.2) since 2003 ... results of this experiment and explores several methods for arriving at estimates of sustainable yields ... - mental fishery at what it considered to be an arbi- trary, but precautionary, level of 260 tonnes for ... data for evidence of stock definition and distribution and explores several methods for arriving at ... biomass in each SSRU for the time period of the experiment (i.e. at the approxi- mate centre of the time ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 71–100 : Автор(ы): Agnew, D.J., C. Edwards, R. Hillary, R. Mitchell and L.J. López Abellán
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Composition and characteristics of ichthyofauna in pelagic waters of South Georgia (Subarea 48.3)
ichthyocenosis in the subarea consisted of pelagic fishes (mainly Myctophidae), distributed at a depth range of ... Paper Title: Composition and characteristics of ichthyofauna in pelagic waters of South Georgia ... (Subarea 48.3) Abstract / Description: This paper presents the results of randomly stratified pelagic ... trawl census surveys conducted in Subarea 48.3. From 1984 to 1990 daily sampling stations aimed at ... sampling stations aimed at studying the vertical migrations of some of the most abundant species were ... ), distributed at a depth range of 250 to 300 m, as well as demersal fishes in the pelagic stage of their life ... i t u t e of Mar ine Fisheries a n d Oceanography (At lan tNIRO) car r ied o u t six pe ... fishing zone (70-100 m) to the 500-metre isobath both during the day and at night. The number of hauls ...
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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Genetic variations and population structure of krill from the Prydz Bay region of Antarctic waters
allele distributions at four polymorphic loci indicate no evidence of significant heterogeneity, a result ... of the Southern Ocean, suggesting that krill stocks over at least 6000 kilometres of Antarctic waters ... Paper Title: Genetic variations and population structure of krill from the Prydz Bay region of ... Antarctic waters Abstract / Description: Samples of Antarctic krill E. superba from six locations near ... allele distributions at four polymorphic loci indicate no evidence of significant heterogeneity, a ... the Atlantic sector of the Southern Ocean, suggesting that krill stocks over at least 6000 ... POPULATION STRUCTURE OF KRILL FROM THE PRYDZ BAY REGION OF ANTARCTIC WATERS C.M. MacDonald, R. Williams ... and M. Adams (Australia) Abstract Samples of Antarctic krill E. superba from six locations near ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 271-273 : Автор(ы): MacDonald, C.M., R. Williams and M. Adams
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Diurnal variations in biological characteristics of krill, Euphausia superba Dana, to the west of the South Orkney Islands, 24 March to 18 June 1990 - based on data reported by a biologist-observer
in periods of light or darkness was noted at several stations. Increases in the proportion of males ... Paper Title: Diurnal variations in biological characteristics of krill, Euphausia superba Dana ... , to the west of the South Orkney Islands, 24 March to 18 June 1990- based on data reported by a ... biologist-observer Abstract / Description: Investigations of diurnal variations in the size composition of ... noted at several stations. Increases in the proportion of males in the catch, as well as an increased ... only one sample per station. These samples are collected on different days and at different times of ... composition analysis. Moreover, euphausiids captured in the same place but at different times of the day can ... of March to the middle of June, 1990 (Table 1). At each station a series of catches was made using a ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 201–222 : Автор(ы): Vagin, A.V., R.R. Makarov and L.L. Menshenina
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A preliminary assessment of age and growth of Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea, Antarctica
–11.0 and 15.1–15.5 cm. Mean lengths of 4.9 and 7.3 cm (at ages 1.3 and 2.3 years respectively) are ... Paper Title: A preliminary assessment of age and growth of Antarctic silverfish (Pleuragramma ... . Standard length and weight were well correlated (r 2 = 0.99). Counts of growth zones in 304 thin-sectioned ... than males, but none of the estimated von Bertalanffy parameters were statistically significantly ... –11.0 and 15.1–15.5 cm. Mean lengths of 4.9 and 7.3 cm (at ages 1.3 and 2.3 years respectively) are ... about 0.6 mm. Because the fish for the current work were sam- pled at the end of summer, otolith ... study that the first opaque zone formed at about 3 months of age, but was not clearly visible or not ... the lengthfrequency distribution oc- curred at 7.1–7.5, 10.6–11.0 and 15.1–15.5 cm. Mean lengths of ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 75–86 : Автор(ы): Sutton, C.P. and P.L. Horn
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