Résultats de la recherche
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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 ... median unexploited spawning biomass Abstract / Description: Two Monte Carlo simulation models, the krill ... 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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Age and growth of the Antarctic skate (Amblyraja georgiana) in the Ross Sea
to upper end of the range of ages at maturity for skates worldwide. The results of this study are ... Paper Title: Age and growth of the Antarctic skate (Amblyraja georgiana) in the Ross Sea Abstract ... thorns, were used to estimate the ages of the Antarctic skate (Amblyraja georgiana) from the Ross Sea ... . Caudal thorns viewed with transmitted white light provided the clearest growth bands, but reading ... –7 years for males and 8–11 years for females. These estimates are near the middle to upper end of ... years for females. These estimates are near the middle to upper end of the range of ages at maturity ... dissolve the centra and made the articulating surfaces brittle and crumbly. After overnight soaking in ... (unreadable). It was sometimes diffi cult to decide where to begin counting thorn bands. The apex of each ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 183–194 : Auteur(s): Francis, M.P. and C. Ó Maolagáin
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The foraging range of Adélie penguins at Béchervaise Island, Mac. Robertson Land, Antarctica, and its overlap with the krill fishery
Paper Title: The foraging range of Adélie penguins at Béchervaise Island, Mac. Robertson Land ... , Antarctica, and its overlap with the krill fishery Abstract / Description: The foraging ranges of six female ... ) were determined by satellite tracking using the ARGOS system. Birds were tracked over four foraging ... trips (two females and four males) during the incubation period (November to December 1991) and 17 trips ... grounds. The foraging range of the birds from Bechervaise Island extends only into the southern end of ... cable ties tightened over the package. When required the PTf could be removed after cutting the ties ... north-northwest from the colony and then walking. The pattern of foraging changed after hatching (24 ... after the PTT number. Where the PTT failed the point of failure is recorded as the furthest distance ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 337–344 : Auteur(s): Kerry, K.R., J.R. Clarke and G.D. Else
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Size compositions of males and females in the course of the life cycle of Euphausia superba
Paper Title: Size compositions of males and females in the course of the life cycle of Euphausia ... size and sex composition of samples from commercial catches are analyzed over the reproductive season ... , using samples from different years. The observed variations were related to stages of krill maturity ... during the reproductive cycle. Information on size composition by sex is considered to be vital for an ... the active reproduction period - from the beginning of maturation of E. superba in spring to the end ... . Specimens were measured to the nearest 1 mm from the tip of rostrum to the end of telson. An abbreviated ... ). Towards the end of spawning season (females at stage C are dominant) size composition becomes most ... : Size composition of E. superba males and females towards the end of spawning season. (For legend, see ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 3–16 : Auteur(s): Makarov, R.R.
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The survivorship of rays discarded from the South Georgia longline fishery
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 ... the line being hauled (b = beginning, m = middle, e = end) on skate survival. Endicott and Agnew ... survived to the end of the experiment might not survive long term if they were seriously damaged by ... mouthparts. • The skate is found to be actively swimming around the tank at the end of the twelfth hour of ... were expected to signifi cantly affect the ability of the skate to survive after haulage. Findings ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 155–164 : Auteur(s): Endicott, M. and D.J. Agnew
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New data on spawning, hatching and growth of Champsocephalus gunnari on the shelf of the Kerguelen Islands
Paper Title: New data on spawning, hatching and growth of Champsocephalus gunnari on the shelf of ... the Kerguelen Islands Abstract / Description: Combined studies on the inner and outer northeastern ... part of the Kerguelen shelf during the 1989/90 to 1993/94 period provide new information on the stock ... the inner shelf has enabled a new cohort of fish to be identified each year. However, annual ... present and the 1988 one can be followed from the beginning (spring 1989/90: 8 to 18 cm) to the end of ... , 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 ... cm/day with the maximum increment occurring during spring and the minimum after autumn. Specimens ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 21–34 : Auteur(s): Duhamel, G
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Abundance, size and maturity of krill (Euphausia superba) in the krill fishing ground of Subarea 48.1 during the 1990/91 austral summer
Paper Title: Abundance, size and maturity of krill (Euphausia superba) in the krill fishing ... ground of Subarea 48.1 during the 1990/91 austral summer Abstract / Description: Acoustic and net ... sampling surveys for krill were conducted in the krill fishing ground north of the South Shetland Islands ... of krill were observed. The survey area was divided into four zones: oceanic, slope frontal, neritic ... the end of the telson. All measurements were carried out by a single observer to avoid ... underestimation but as a true reflection of lower biomass at the end of January in the 1990/91 season. The krin ... only in the last two zones by the end of February, 1991. Post- spawned krill were observed in their ... , and migrate into the neritic and nearshore zones. It is therefore considered that toward the end of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 183–199 : Auteur(s): Ichii, T., H. Ishii and M. Naganobu
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Distribution and size of Antarctic krill (Euphausia superba Dana) in Polish commercial catches taken in the Atlantic sector of the Southern Ocean from 1997 to 1999
commercial catches taken in the Atlantic sector of the Southern Ocean from 1997 to 1999 Abstract ... / Description: The distribution and internal structure of commercial krill concentrations were investigated in ... the areas of the South Shetland, Elephant, South Georgia and South Orkney Islands in the spring and ... summer from 1997 to 1999. The density of concentrations varied with area and season. The densest ... min (SD: 15.2 and 27.6 respect- ively). Records of the beginning and the end of each trawling were ... which shooting was completed and the net began to fi sh. The end of trawling was the time at which ... since the beginning of commercial exploitation. However, most of these studies have been short term ... used in order to determine the dura- tion of each haul. The beginning of trawling was the time at ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 83–105 : Auteur(s): Jackowski, E
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The biology, ecology and development of fishery management advice for the anomuran crabs at South Georgia (CCAMLR Subarea 48.3)
Paper Title: The biology, ecology and development of fishery management advice for the anomuran ... crabs at South Georgia (CCAMLR Subarea 48.3) Abstract / Description: This review summarises the ... available information on the biology and ecology of the lithodids at South Georgia and provides an overview ... of the development of a management regime for them. Finally it aims to highlight areas in which ... would be redirected to the local areas depleted during Phase 2. This would occur towards the end of ... of crabs, and fish larvae are likely to be retained within the gill cavity after hatching and may ... aggregations; the recovery of areas after intense depletion episodes; and the drivers behind monthly shifts ... – series of depletion experiments con- ducted in local areas to start at the beginning of the second ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 1–15 : Auteur(s): Belchier, M., T. Peatman and J. Brown
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Options for allocating the precautionary catch limit of krill among small-scale management units in the Scotia Sea
Paper Title: Options for allocating the precautionary catch limit of krill among small-scale ... management units in the Scotia Sea Abstract / Description: Following an assessment of Antarctic krill ... (Euphausia superba) in the Scotia Sea, CCAMLR established a precautionary catch limit of 4 million tonnes and ... further adopted 15 smallscale management units (SSMUs). The intent was to subdivide the precautionary ... that krill catches be reported at a scale of 10 by 10 n mile squares by 10-day periods at the end of ... from the end of the previous breeding season may be more appropriate for option (v). Nevertheless ... archipelago) and the eastern end of South Georgia. Under option (i) a correspondingly high proportion of ... to the fi shery should be determined after accounting for predator demand; if the estimate of ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 81–97 : Auteur(s): Hewitt, R.P., G. Watters, P.N. Trathan, J.P. Croxall, M.E. Goebel, D. Ramm, K. Reid, W.Z. Trivelpiece and J.L. Watkins