Search results
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Length-based assessment for mackerel icefish (Champsocephalus gunnari) at South Georgia
accurate identification of age cohorts from the survey data. In this paper a length-based approach is ... described that removes the problem of cohort determination. A bootstrap technique (consistent with the ... current CCAMLR approach) is used to estimate the length distribution of the population from the survey ... data which, in conjunction with the bootstrapped survey biomass data, yields an estimate of the ... ,*, C.T.T. Edwards1,2, R.E. Mitchell2 and D.J. Agnew2 1 Fisheries Group Division of Biology Imperial ... (TAC). One issue is the accurate identification of age cohorts from the survey data. In this paper a ... length-based approach is described that removes the problem of cohort determination. A bootstrap ... technique (consistent with the current CCAMLR approach) is used to estimate the length distribution of the ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 129–137 : Author(s): Hillary, R.M., C.T.T. Edwards, R.E. Mitchell and D.J. Agnew
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Krill biomass assessment in Statistical Area 48 from the RV AtlantNIRO data - Autumn 1989/90
Islands was assessed at 3.8 million tonnes, most of which was concentrated in the waters of the Weddell ... Sea. In contrast to this site, the one off the South Orkney Islands is well-established in terms of ... tonnes. Most of this stock was concentrated in the south-western part of the Coronation Island shelf ... , most of which was concentrated in the waters of the Weddell Sea. In contrast to this site, the one ... off the South Orkney Islands is well-established in terms of both research and commercial harvesting ... . The overall krill stock here was estimated to be 1.1 million tonnes. Most of this stock was ... concentrated in the south-western part of the Coronation Island shelf. Resume En mars/avril 1990, une ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 115–121 : Author(s): Fedotov, A.C.
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International CCAMLR applied research and monitoring program, Prydz Bay priority area
area Abstract / Description: An outline is given of a proposed scientific research contribution by ... Australia towards the first five years of an International CCAMLR Applied Research and Monitoring Program in ... the Prydz Bay area. Emphasis is placed on the krill based part of the marine community in the Prydz ... Bay area. Some attention is also given to the fish and squid based part of the marine community on the ... RESEARCH AND MONITORING PROGRAM, PRYDZ BAY PRIORITY AREA Australia Abst ract An outline is given of ... a proposed scientific research contribution by Australia towards the first five years of an ... the krill based part of the marine community in the Prydz Bay area. Some attention is also given to ... the fish and squid based part of the marine community on the Kerguelen Plateau. PROGRAMME ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 283-295 : Author(s): Australia
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Toothfish, Dissostichus eleginoides, at South Georgia
, paragraph 106). Histological examination of the gonads of a small sample of fish taken from a commercial ... longliner in January 1990 indicates that the fish are sexually mature and, at the time of sampling, are ... examination of the gonads of a small sample of fish taken from a commerciallongliner in January 1990 ... indicates that the fish are sexually mature and, at the time of sampling, are approaching spawning ... . INTRODUCTION During the Eighth Meeting of CCAMLR it was noted that the Scientific Committee had recommended ... that a TAC of 1200 tonnes be set for Dissostichus eleginoides in Subarea 48.3. That estimate was based ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 255–261 : Author(s): Everson, I. and S. Campbell
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Champsocephalus gunnari stock status in the South Georgia area
/ Description: ata of age composition and fishing effort for 1976/77-1987/88 were used to analyse stock status ... , Gamma methods, Pope and Shepherd method, using F regression on fishing effort and method of average ... intensity (F) in a predicted period was equal to the average value of fishing mortality: (b) For the ... predicted period fishing intensity was at the level of that in 1987/88; (c) For the predicted period fishing ... THE SOUTH GEORGIA AREA R. Borodin, P. Kochkin Abstract Data of age composition and fishing ... , using F regression on fishing effort and method of average weighted F. For 1986/87 the values ... predicted period was equal to the average value of fishing mortality: ( b) For the predicted period ... fishing intensity was at the level of that in 1987/88; ( c ) For the predicted period fishing intensity ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 1-18 : Author(s): Borodin, R. and P. Kochkin
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Length-at-age in juvenile Patagonian toothfish (Dissostichus eleginoides)
/ Description: We used the otoliths from a sample of Dissostichus eleginoides pre-recruits, whose length ... estimated from reading otoliths in a goodness-of-fit test. The majority of the otoliths (83.6%) were ... estimated to be from fish 1+ or 2+ years old, with mean total lengths of 32.5 cm and 41.3 cm respectively ... Cambridge CB3 0ET, United Kingdom Abstract We used the otoliths from a sample of Dissostichus eleginoides ... on length, and compared with ages estimated from reading otoliths in a goodness-of-fi t test. The ... majority of the otoliths (83.6%) were estimated to be from fi sh 1+ or 2+ years old, with mean total ... lengths of 32.5 cm and 41.3 cm respectively. No difference was found between predicted and estimated ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 1–10 : Author(s): Ashford, J., C. Jones, S. Bobko and I. Everson
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Otolith and body size relationships in the mackerel icefish (Champsocephalus gunnari)
) Abstract / Description: A large sample of otoliths from the mackerel icefish (Champsocephalus gunnari) was ... measured and weighed and their effectiveness as predictors of fish length and fish mass determined. The two ... measures, otolith length and otolith mass, provide good predictors of fish length, the latter being ... Kingdom Abstract A large sample of otoliths from the mackerel icefish (Champsocephalus gunizari) was ... measured and weighed and their effectiveness as predictors of fish length and fish mass determined. The ... two measures, otolith length and otolith mass, provide good predictors of fish length, the latter ... of food webs generally begins with a simple descriptive picture of major interactions. Extending ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 117–123 : Author(s): Everson, I., B. Bendall and A. Murray
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Trawl selectivity for Champsocephalus gunnari
area. The trawl bags tested were made of net webbing with 3.1 mm twine and 88.2 mm mesh size. Trawling ... speed was 3.5 knots. Icefish comprised 90 to 100% of catches. The logistic selectivity curves were ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 69–75 : Author(s): Efanov, S.F., G.E. Bidenko and V.A. Boronin
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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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Selectivity parameters for Notothenia gibberifrons Lönnberg, 1905 and Champsocephalus gunnari Lönnberg, 1905 obtained during “8611 ANTARCTICA [ANTARTIDA]” expedition
different methods with a codend mesh of 68 mm were 2.87 for Notothenia gibberifrons and 3.10 for ... . Selection factors calculated following different methods with a codend mesh of 68 mm were 2.87 for ... , 1980. Working Party on Antarctic Fish Biology, Recommended Methods for Standardization of Measurements ... of Fish. BIOMASS Handbook num. 13. CCAMLR, 1986a. Informe de la quinta reunion del Comite ... J.A., 1983. Fish Stock Assessment. A Manual of Basic Methods. FAO/Wiley Series on food and ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 87-105 : Author(s): Balguerías, E.