Search results
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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 : Author(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
area, May 1983. Experiment ' No.ofKriU TS (cage + krlU), Krill KriU Length No. in the Cage dB TS,dB ... strength assessment at 136 kHz. Elephant Island area, January 1985. Experiment No.ofKriU TS (cage ... 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 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 141–157 : Author(s): Kasatkina, S.M.
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Trends in population size and breeding success at colonies of macaroni and rockhopper penguins, Marion Island, 1979/80–1995/96
ofMarine Science, 16: 101-118. Croxall, J.P., T.S. McCann, P.A. Prince and P. Rothery. 1988 ... 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 ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 89–103 : Author(s): Cooper, J., A.C. Wolfaardt and R.J.M. Crawford
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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 : Author(s): Brierley, A.S., J.L. Watkins, C. Goss, M.T. Wilkinson and I. Everson
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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 : Author(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 : Author(s): Kock, K.-H., L. Pshenichnov, C.D. Jones, K. Shust, K.E. Skora and Zh.A. Frolkina
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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 : Author(s): Zuleta, A.V. and C.A. Moreno
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A composite recruitment index to describe interannual changes in the population structure of Antarctic krill at South Georgia
structure of Antarctic krill at South Georgia Abstract / Description: A composite recruitment index based ... and length data are derived from standard station net hauls only. Comparison of these indices showed ... substantial differences, due in part to bias arising from a large number of krill in just one of the station ... net hauls. Therefore, when the number of station net hauls is limited, bias is likely to be reduced if ... RECRUITMENT INDEX TO DESCRIBE INTERANNUAL CHANGES IN THE POPULATION STRUCTURE OF ANTARCTIC KRILL AT SOUTH ... population structure have been obtained from krill eaten by predators at the western end of South Georgia ... Programme has carried out systematic net hauls at up to eight stations within each of two boxes on the ... survey boxes is shown at the top left. The bathymetric contour represents 1 000 m. Table 1: Number of ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 71–84 : Author(s): Watkins, J.L
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Assessments of by-catch in trawl fisheries at Heard and McDonald Islands
Paper Title: Assessments of by-catch in trawl fisheries at Heard and McDonald Islands Abstract ... (Statistical Division 58.5.2) to significantly affect, in the long term, spawning biomass of three taxa caught ... skates). The long-term annual yield for each of the three taxa was estimated using the generalised yield ... biomass estimates from surveys in the region from 1990 to 1993 and a limited amount of biological data ... ASSESSMENTS OF BY-CATCH IN TRAWL FISHERIES AT HEARD AND MCDONALD ISLANDS A.J. Constable, R. Williams and ... to those that maintain the by-catch at 'tolerable' levels relative to the catch of the target ... Measures 109/XV and 11O/XV provisions aimed at protecting by-catch species in the course of these ... at least five days.' Neither of the two approaches indicated above makes a direct appraisal of ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 231–243 : Author(s): Constable, A.J., R. Williams and W.K. de la Mare
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Factors affecting the incidental mortality of seabirds in the Dissostichus eleginoides fishery in the southwest Atlantic (Subarea 48.3, 1995 season)
has requested its Members to ensure that each vessel participating in the D. eleginoides fishery has ... fishing trips, as indicated in Tables 1 and 3. Thus, 14 fishing trips (87.5%) out of a total of 17 trips ... in this paper. Data on incidental mortality from the Korean vessel Ihn Sung 66, which made two trips during ... Isla Sofia Magallanes III Isla lsabel Total Trip 1 Trip 2 Species M . giganteus ... Paper Title: Factors affecting the incidental mortality of seabirds in the Dissostichus ... analyses all incidental mortality of seabirds recorded on Argentinian and Chilean vessels fishing for ... possible to evaluate almost all of the incidental mortality of seabirds observed during the season. The ... total mortality recorded was 1 428 birds of which white-chimed petrels (Procellaria aequinoctialis ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 79–91 : Author(s): Moreno, C.A., P.S. Rubilar, E. Marschoff and L. Benzaquen