Search results
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Age and growth of the Antarctic skate (Amblyraja georgiana) in the Ross Sea
of 6–7 years for males and 8–11 years for females. These estimates are near the middle to upper end ... end of the range of ages at maturity for skates worldwide. The results of this study are preliminary ... for males and 8–11 years for females. These estimates are near the middle to upper end of the range of ages ... tended to dissolve the centra and made the articulating surfaces brittle and crumbly. After overnight ... 1 (excellent) to 5 (unreadable). It was sometimes diffi cult to decide where to begin counting thorn bands ... length of about 8 mm. Possible explanations for this discrepancy include thorn shrinkage after ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 183–194 : Author(s): Francis, M.P. and C. Ó Maolagáin
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The Patagonian toothfish (Dissostichus eleginoides) fishery in the Kerguelen Islands (Indian Ocean sector of the Southern Ocean)
sardine or squid. As for trawling, longline CPUE, after fluctuating significantly at the beginning ... (Figure 13), but begins later for males (end of May), and is still occurring at the beginning of August ... . The Kerguelen Islands were the first to be exploited after large concen- trations of D. eleginoides were ... for D. eleginoides, both for trawlers (kg/hour trawling) and for longliners (g/hook hauled) from the beginning ... Paper Title: The Patagonian toothfish (Dissostichus eleginoides) fishery in the Kerguelen Islands ... (Indian Ocean sector of the Southern Ocean) Abstract / Description: Patagonian toothfish (Dissostichus ... eleginoides) have been fished in the Kerguelen Islands zone for 20 years, firstly with trawlers and more ... recently with longliners. This is the oldest fishery targeting D. eleginoides in the Indian Ocean sector of ...
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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CPUE indices used in Soviet krill fishery statistics from 1977 to 1992 and their possible utility for evaluation of relative changes in krill biomass
end products, i.e. human consumption, krill meal and frozen krill. Daily mean CVDF and CHT calculated ... intended for different end products, i.e. human consumption, krill meal and frozen krill. Daily mean CVDF ... targeting krill intended for different end products, i.e. human consumption, krill meal and frozen krill ... (e.g. vessel type, haul duration, number of hauls per day, gear type, catch compo- sition, end product ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 165–177 : Author(s): Litvinov, F.F., A.Z. Sundakov and V.I. Arkhipov
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Estimating the impact of depredation by killer whales and sperm whales on longline fishing for toothfish (Dissostichus eleginoides) around South Georgia
May at the start of the season with the sightings becoming fewer towards the end of the season ... towards the end of the season in August. Killer whale interactions appear to be more consistent ... at the beginning of May, continuing westwards towards the end of the season and moving on towards the Falkland ... of the season with the sightings becoming fewer towards the end of the season in August. Killer whale ... the end of the season; over the seven years, 27% of observed sets have been set in May, 26% in June ... move- ment which shows the majority of sightings at the start of the season in the east and at the end ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 163–178 : Author(s): Moir Clark, J. and D.J. Agnew
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Estimates of circumpolar abundance of Antarctic krill based on recent acoustic density measurements
tonnes- at the low end of values that have been suggested in the past. The differences between our ... . The biomass estimates fall between 60 and 155 million tonnes - at the low end of values that have been ... range of krill. The biomass estimates fall between 60 and 155 million tonnes - at the low end of values ... in the past, we know enough about the distribution of krill to begin the process of subdividing these large ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 87–99 : Author(s): Nicol, S., A.J. Constable and T. Pauly
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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
from the end of March to June was observed in the fishing area. The following three causes ... of krill per station) is discussed. A gradual decrease in the average size of krill from the end of March ... . Vertical migrations gradually end at the beginning of winter and krill form stable concentrations ... from the end of March to June was observed in the fishing area. The following three causes ... vessel Grigory Kovtun in the fishing area near the South Orkney Islands from the end of March ... of the day. As may be seen in Figure 5, curves for most stations increased their complexity towards the end ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 201–222 : Author(s): Vagin, A.V., R.R. Makarov and L.L. Menshenina
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Natural mortality rate in the mackerel icefish (Champsocephalus gunnari) around South Georgia
(Champsocephalus gunnari) from the period prior to known large-scale commercial harvesting is discussed. After ... the period prior to known large-scale commercial harvesting is discussed. After careful consideration ... prior to known large-scale commercial harvesting is discussed. After careful consideration of the data ... a period several years after large-scale fishing commenced. In the absence of fishing such a procedure ... Frolkina and Dorovskikh (1991) begin slightly high for 3- and 4-year-olds, but for older ages ... made during or after the last season of experimental fishing. What is, however, surprising ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 245–257 : Author(s): Everson, I
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An assessment of CCAMLR measures employed to mitigate seabird mortality in longlining operations for Dissostichus eleginoides around South Georgia
and Selling (1996) reported that seabird mortality appeared to decline towards the end of April/ beginning ... turned off after the leading buoys had been cast away, and were not turned on again until the end ... susceptible to capture during the day; catch rates of these and white-chinned petrels were reduced after ... of coils of line attached end to end. The two lines were connected by lines attached from the end of each ... the effectiveness of measures employed by CCAMLR to mitigate seabird mortality. Following an agreement ... between the Governments of the United Kingdom and Chile, a UK observer was placed aboard a Chilean ... longliner, the BF Cisne Verde, fishing in CCAMLR Subarea 48.3 during the 1996/97 season. In this study 61 ... lines were laid from March to May 1997 using the Spanish double-line method. In accordance with CCAMLR ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 217–230 : Author(s): Ashford, J.R. and J.P. Croxall
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The survivorship of rays discarded from the South Georgia longline fishery
and position of capture on the line being hauled (b = beginning, m = middle, e = end) on skate survival ... of the skate to survive after haulage. Findings by Francis and Smith (2002) from tagged skate recaptures ... of the population is not included in the study and would therefore have an unknown survival rate after hauling ... that survived the 12-hour tanking period were released after taking measurements of total length and disc ... Paper Title: The survivorship of rays discarded from the South Georgia longline fishery Abstract ... / Description: Post-haulage survival experiments were conducted on 95 Raja sp. anon. cut off longlines at the ... sea surface by the Chilean fishing vessel Isla Sofía in May and June 2003 during the toothfish fishing ... season in Subarea 48.3. Capture depth had a consistently significant influence on the mortality of skates ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 155–164 : Author(s): Endicott, M. and D.J. Agnew
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Revised age and growth estimates for Antarctic starry skate (Amblyraja georgiana) from the Ross Sea
, after which growth almost ceases (Francis and Ó Maolagáin, 2005). An alternative interpretation of age ... that these skates initially grow very rapidly for about five years, after which growth almost ceases (Francis ... , after which growth almost ceases (Francis and Ó Maolagáin, 2005). An alternative interpretation of age ... for the two readers were similar up to about 18 years, after which they diverged (Figure 3, Table ... 1). Reader 1’s growth curve fitted the data at the upper end bet- ter and had more plausible parameter ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 211–220 : Author(s): Francis, M.P. and M.J. Gallagher