Résultats de la recherche
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Spawning locations of mackerel icefish at South Georgia
Paper Title: Spawning locations of mackerel icefish at South Georgia Abstract / Description ... inshore spawning at South Georgia during April within and close to the bays on the north side of the ... be at a very much lower intensity than inshore. There is some evidence of spawning at Shag Rocks ... : Historical information on the distribution of spawning and larval mackerel icefish (Champsocephalus gunnari ... LOCATIONS OF MACKEREL ICEFISH AT SOUTH GEORGIA I. Eversonm, A.W. North, A. Paul, R. Cooper and N.C ... evidence of inshore spawning at South Georgia during April within and close to the bays on the north side ... appears to be at a very much lower intensity than inshore. There is some evidence of spawning at Shag ... Georgia and Shag Rocks. Commercial fishing has taken place over much of the shelf at depths to around ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 107–118 : Auteur(s): Everson, I., A.W. North, A. Paul, R. Cooper, N.C. McWilliam and K.-H. Kock
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Trends in relative abundance of fjord Notothenia rossii, Gobionotothen gibberifrons and Notothenia coriiceps at Potter Cove, South Shetland Islands, after commercial fishing in the area
Abstract / Description: Monitoring of demersal fish at inshore sites of the South Shetland Islands has ... continued at Potter Cove from 1991 to 1999, and at Harmony Cove, Nelson Island, in the austral summer of ... Paper Title: Trends in relative abundance of fjord Notothenia rossii, Gobionotothen gibberifrons ... and Notothenia coriiceps at Potter Cove, South Shetland Islands, after commercial fishing in the area ... ABUNDANCE OF FJORD NOTOTHENIA ROSSII, GOBIONOTOTHEN GIBBERIFRONS AND NOTOTHENIA CORIICEPS AT POTTER COVE ... Gallardo 470, C1405DJR Buenos Aires, Argentina Abstract Monitoring of demersal fish at inshore sites of ... started at the end of the 1960s. The fishery was developed mainly in offshore waters around South ... N. rossii and G. gibberifrons inhabit neritic waters. This part of the population was studied at ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 43–52 : Auteur(s): Barrera-Oro, E.R., E.R. Marschoff and R.J. Casaux
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Target strengths of krill at 136 and 20 kHz
Paper Title: Target strengths of krill at 136 and 20 kHz Abstract / Description: Estimation of ... . Ensonification of encaged live krill. For aggregations with mean lengths from 45 to 50 mm the mean single-krill ... target strengths range from-68 to-69 dB at 136 kHz. For aggregations with mean lengths from 43 to 47 mm ... the mean single-krill target strengths range from-71 to-77 dB at 20 kHz. Trawl hydroacoustic method ... WG-KRILL-91/29 TARGET STRENGTHS OF KRILL AT 136 AND 20 ... Strength Estimation of Encaged Krill (1) Measurements were taken from a vessel standing at anchor where ... • hydroacoustic transducer (magnetostrictive) • width of directional diagram at 3 dB - 11 ° x 28°. Operating ... • hydroacoustic transducer (piezoceramic) • width of directional diagram at 3 dB - 10°. The cage was cubic in ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 141–157 : Auteur(s): Kasatkina, S.M.
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Acoustic estimates of krill density at South Georgia, 1981 to 1998
Paper Title: Acoustic estimates of krill density at South Georgia, 1981 to 1998 Abstract ... / Description: Acoustic estimates of densities of Antarctic krill, Euphausia superba, at South Georgia during ... 11 austral summers between 1981 and 1998 are presented. Krill density at the island fluctuated widely ... 1994 austral summer seasons were characterised by particularly low densities of krill (upper 95 ... OF KRILL DENSITY AT SOUTH GEORGIA, 1981 TO 1998 A.S. Brierley, J.L. Watkins, C. Goss, M.T ... Kingdom Abstract Acoustic estimates of densities of Antarctic krill, Euphausia superba, at South ... environment around the island. This paper presents the best estimates of krill density at South Georgia ... pelagic ecosystem at South Georgia. MATERIALS AND METHODS A summary of acoustic survey details for all ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 47–57 : Auteur(s): Brierley, A.S., J.L. Watkins, C. Goss, M.T. Wilkinson and I. Everson
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Trends in population size and breeding success at colonies of macaroni and rockhopper penguins, Marion Island, 1979/80–1995/96
Paper Title: Trends in population size and breeding success at colonies of macaroni and ... . The only significant relationship between inter-season trends in the number of pairs breeding at the ... period, while the other remained stable. Trends in the number of pairs breeding at the three rockhopper ... rockhopper penguins, Marion Island, 1979/80–1995/96 Abstract / Description: At sub-Antarctic Marion Island ... POPULATION SIZE AND BREEDING SUCCESS AT COLONIES OF MACARONI AND ROCKHOPPER PENGUINS, MARION ISLAND ... significant relationship between inter-season trends in the number of pairs breeding at the three colonies ... the other remained stable. Trends in the number of pairs breeding at the three rockhopper penguin ... Population Size and Breeding Success of Penguins at Marion Island todas significativas. La proporcion de ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 89–103 : Auteur(s): Cooper, J., A.C. Wolfaardt and R.J.M. Crawford
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Size at sexual maturity of Patagonian toothfish (Dissostichus eleginoides)
Paper Title: Size at sexual maturity of Patagonian toothfish (Dissostichus eleginoides) Abstract ... / Description: Analyses of size at sexual maturity were undertaken on samples of Patagonian toothfish ... that L m50 occurs at 78.5 cm total length for male and 98.2 cm for female fish. In 1997 the results for ... proportion, 25 to 43%, of sexually mature fish were not coming into spawning condition. This introduces a ... Survey High Cross, Madingley Road Cambridge CB3 OET, United Kingdom Abstract Analyses of size at ... eggs and mature at about half their maximum length (Kock and Everson, 1998). The process of yolk ... reproductive cycle. This was highlighted at the 1997 meeting of the CCAMLR Working Group on Fish Stock ... (asymptote = 1). The length at which 50% of the population were mature (L,,,) was determined from the ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 37–46 : Auteur(s): Everson, I. and A.W. Murray
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Joinville–D’Urville Islands (Subarea 48.1) – a former fishing ground for the spiny icefish (Chaenodraco wilsoni), at the tip of the Antarctic Peninsula – revisited
icefish (Chaenodraco wilsoni), at the tip of the Antarctic Peninsula – revisited Abstract / Description ... Expedition ANT XIX/3 by RV Polarstern in February 2002. Five hauls were conducted north of the two islands at ... primarily fish 25–35 cm long. The fish fauna at the tip of the Antarctic Peninsula represents a combination ... : The former fishing ground off Joinville–D’Urville Islands was revisited in the course of the Antarctic ... GROUND FOR THE SPINY ICEFISH (CHAENODRACO WILSONI), AT THE TIP OF THE ANTARCTIC PENINSULA – REVISITED ... Polarstern in February 2002. Five hauls were conducted north of the two islands at depths of 149 to 282 m on ... fi sh 25–35 cm long. The fi sh fauna at the tip of the Antarctic Peninsula represents a combination ... much more sparse. This is particularly true of the fi shing ground off Joinville–D’Urville Islands at ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 1–20 : Auteur(s): Kock, K.-H., L. Pshenichnov, C.D. Jones, K. Shust, K.E. Skora and Zh.A. Frolkina
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A first attempt at an assessment of the Patagonian toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands EEZ
Paper Title: A first attempt at an assessment of the Patagonian toothfish (Dissostichus ... a robust indication that the spawning biomass has been depleted to, at most, a few percent only of ... eleginoides) resource in the Prince Edward Islands EEZ Abstract / Description: The history of the fishery for ... -per-unit-effort (CPUE) trend. Application of a simple age-structured production model (ASPM) provides ... , Vol. 9 (2002): 11–32 11 A FIRST ATTEMPT AT AN ASSESSMENT OF THE PATAGONIAN TOOTHFISH (DISSOSTICHUS ... indication that the spawning biomass has been depleted to, at most, a few percent only of its pre ... -effort (CPUE). This paper presents a fi rst attempt at a quan- titative assessment of the resource, by ... the fi shery. The use of a deterministic model assumes that the resource was at its average pre ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 11–32 : Auteur(s): Brandão, A., D.S. Butterworth, B.P. Watkins and D.G.M. Miller
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Catch-at-age analysis applied to new fisheries: the case of Dissostichus eleginoides
Paper Title: Catch-at-age analysis applied to new fisheries: the case of Dissostichus eleginoides ... Abstract / Description: Traditionally, the approach used in the assessment of new fisheries has been based ... on research surveys, making it possible to estimate the standing stock and potential yield of a ... resource by coarse methods. The main aim of such surveys is to monitor fishing operations in order to ... evaluation methods based on catch composition data. This paper explores the application of catch-at-age ... -at-age model proposed below relates to this last type of fishery. 2. EVALUATION MODEL The basic ... assumptions of the catch-at-age model are as follows: • the stock of D. eZeginoides belongs to a closed ... = numbers at the beginning of the research survey J.1i = exploitation rate F i = fishing mortality r i ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 3–9 : Auteur(s): Zuleta, A.V. and C.A. Moreno
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Movement, growth and available abundance to the fishery of Dissostichus eleginoides Smitt, 1898 at Heard Island, derived from tagging experiments
Smitt, 1898 at Heard Island, derived from tagging experiments Abstract / Description: tocks of ... Paper Title: Movement, growth and available abundance to the fishery of Dissostichus eleginoides ... Patagonian toothfish (Dissostichus eleginoides) in different sectors of the Southern Ocean are considered to ... separate between shelves and banks separated by deep water. More particularly, the separation of stocks on ... was at the upper end of the size range normally found on the grounds. These four long-range movers ... and from the Kerguelen Plateau by extensive stretches of water deeper than 2 000 m. At present, fi ... of times with values for growth, mortality and abundance drawn at random from suitable statistical ... structure of the GYM and the parameters used in the modelling of the toothfi sh stock at HIMI are detailed ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 33–48 : Auteur(s): Williams, R., G.N. Tuck, A.J. Constable and T. Lamb