Search results
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New data on spawning, hatching and growth of Champsocephalus gunnari on the shelf of the Kerguelen Islands
each current cohort and the relative abundance of spawners-at-age during each winter spawning period ... Paper Title: New data on spawning, hatching and growth of Champsocephalus gunnari on the shelf of ... part of the Kerguelen shelf during the 1989/90 to 1993/94 period provide new information on the stock ... of Champsocephalus gunnari. A quarterly program of ichthyoplanktonic and bottom trawl surveys over ... each current cohort and the relative abundance of spawners-at-age during each winter spawning period ... , 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 ... adult fish exceeded immature ones in number, but at a low level of abundance. C. gunnari on the ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 21–34 : Author(s): Duhamel, G
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1989/1990 stock status and TAC assessment for Patagonotothen brevicauda guntheri in South Georgia subarea (48.3)
. Stock has been assessed at 123.1 thousand tonnes with a TAC of 28.3 thousand tonnes for the initial ... period of 1989/90 fishing season. File: 08-Shilbanov.pdf ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 101–110 : Author(s): Shlibanov, V.I.
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Preliminary model of krill fishery behaviour in Subarea 48.1
Paper Title: Preliminary model of krill fishery behaviour in Subarea 48.1 Abstract / Description ... : A simple model of the behaviour of the krill fishery in FAO Statistical Subarea 48.1 (South Shetland ... Islands and Antarctic Peninsula) is described. Parameters of the model are calculated from Chilean fishery ... data over the period 1989 to 1992. The distribution of catches predicted by the model, which is ... at present. However, in this scenario, the catch would be more concentrated in foraging areas of ... currently at least three-times lower than estimates of predator consumption in the same area (Agnew, 1992 ... predators on these islands, is also shown in Table 2. The effect of the high CPUE at Elephant Island can ... CCAMLR Science, Vol. 1: 71-79 PRELIMINARY MODEL OF ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 71–79 : Author(s): Agnew, D.J. and V.H. Marín
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A study of Patagonian toothfish (Dissostichus eleginoides) post-tagging survivorship in Subarea 48.3
. In the 2005 fishing season, observers were addi- tionally requested to randomly and occasionally take fish ... , partially due to the deliber- ate inclusion of fish in poor condition, but probably also due ... Paper Title: A study of Patagonian toothfish (Dissostichus eleginoides) post-tagging survivorship ... survivorship of toothfish following tagging were carried out on eight different vessels fishing in Subarea 48.3 ... . Toothfish were kept in tanks with seawater replacement for at least 12 hours after tagging. On one vessel ... , fish with a variety of injuries were selected to see if this affected recovery. In the final analysis ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 279–289 : Author(s): Agnew, D.J., J. Moir Clark, P.A. McCarthy, M. Unwin, M. Ward, L. Jones, G. Breedt, S. Du Plessis, J. Van Heerdon and G. Moreno
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Use of the Leslie stock depletion model for the assessment of local abundance of Patagonian toothfish (Dissostichus eleginoides)
in localised areas for periods of at least three days. The results suggest that there is greater ... Paper Title: Use of the Leslie stock depletion model for the assessment of local abundance of ... toothfish (Dissostichus eleginoides) around South Georgia and the Pacific coast of Chile. This paper ... presents a re-working and synthesis of previous analyses to examine whether declines in CPUE can be ... against cumulative catch, when single vessels operate in localised areas for periods of at least three ... are indications of significant levels of unreported catch from Subarea 48.3. At its 1995 meeting the ... attempted to assess the status of the toothfish fishery in Subarea 48.3 at its annual meetings since the ... showing locations of fishing grounds at which the data for this study were collected. Assessment of ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 55–77 : Author(s): Parkes, G., C.A. Moreno, G. Pilling and Z. Young
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Survey of Antarctic fur seals in the South Shetland Islands, Antarctica, during the 1986/87 austral summer
largest pupping sites are at Telmo Island and Cape Shirreff, on the north coast of Livingston Island ... Paper Title: Survey of Antarctic fur seals in the South Shetland Islands, Antarctica, during the ... 1986/87 austral summer Abstract / Description: A survey of Antarctic fur seals in the South Shetland ... population recovery and recolonization of rookery sites following 19th Century commercial exploitation ... were begun in the South Georgia vicinity, the number of pups born at Bird Island and South Georgia ... ; Laws 1984). At present, the majority of Antarctic fur seal pups are born at Bird Island, South ... during the breeding season at several of these sites but census coverage has been incomplete. Fur ... first post-exploitation record of successful pup production being reported by O'German (1961) at ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 427-440 : Author(s): Bengtson, J.L., L.M. Ferm, T.J. Härkönen, E.G. Schaner and B.S. Stewart
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Small scale krill surveys: simulations based on observed euphausiid distributions
lowest for the survey design utilising parallel transects set at right angles to the long axis of the ... Abstract / Description: An observed distribution of aggregations of the euphausiid, Meganyctiphanes ... norvegica is used to model the effects of krill swarm orientation and shape on the success of two proposed ... survey designs. The simulation involves a number of random paths of parallel or radially arranged ... utilising parallel transects set at right angles to the long axis of the aggregations. Calculations based ... , directed at regions around CEMP sites for the duration of CEMP predator parameter monitoring; these may ... origin at the bottom left hand corner with a constant radius of 100 units, but they had a gap close to ... number of rotations of the distributions were used to investigate the effects of starting surveys at ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 245–256 : Author(s): Agnew, D.J. and S. Nicol
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CCAMLR ecosystem monitoring and management: future work
: Harvesting of marine living resources in the Southern Ocean is managed by the Commission for the Conservation ... of Antarctic Marine Living Resources (CCAMLR). CCAMLR is widely known for its ecosystem approach to ... managing fisheries with the maintenance of ecological relationships included in the conservation objectives ... . In the late 1980s, CCAMLR’s precautionary approach was developed, incorporating principles of how to ... a Target Population Environment Predators Prey Other Catch Estimation of Status D at a D at ... it h ef fe ct s of c ha ng es in pr ey o n pr ed at or s an d th e co nv er ... al fo rc in g of p re y d yn am ic s D at a us ed E st im at ed p ar am et er ... s ca n be u se d So m e fi tt in g of m od el s to es ti m at ed p ar am ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 233–253 : Author(s): Constable, A.J
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Revised age and growth estimates for Antarctic starry skate (Amblyraja georgiana) from the Ross Sea
) from the Ross Sea Abstract / Description: A previous study on the age and growth of Amblyraja ... , after which growth almost ceases (Francis and Ó Maolagáin, 2005). An alternative interpretation of age ... . By counting fine growth bands in the caudal thorns instead of broad diffuse bands, growth curves have ... been generated that suggest much slower growth, greater ages-at-maturity (about 20 years compared with ... potential impact of fishing on this spe- cies, research has been directed at understanding its biology and ... cessa- tion of growth. They estimated the age-at-sexual- maturity to be 6–7 years for males and 8–11 ... lead to different estimates of age-at-maturity, lon- gevity and growth rate from those suggested by ... , but most (61.5%) were scored as reada- bility 4 (bands very unclear over at least part of the thorn ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 211–220 : Author(s): Francis, M.P. and M.J. Gallagher
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Age and growth of Antarctic euphausiacea (crustacea) under natural conditions
Paper Title: Age and growth of Antarctic euphausiacea (crustacea) under natural conditions ... Abstract / Description: Five species of Antarctic euphausiid crustaceans were studied from the Antarctic ... regressions. No difference in growth of krill was observed between the Antarctic Peninsula area and the ... shorter life span than females, while their growth rate is similar. A short description of the life cycle ... generation time of each species is given. In general, Antarctic euphausiids seem to remature and spawn at ... - 369 - SC-CAMLR-VI/BG/24 AGE AND GRcwrH OF ANTARCTIC ... EUPHAUSIACEA (CRUSTACEA) UNDER NATURAL CONDITIONS* V. siegel1 (Federal Republic of Germany) Abstract ... Five species of Antarctic euphausiid crustaceans were studied from the Antarctic Peninsula and the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 369-370 : Author(s): Siegel, V.