Search results
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A hybrid approach to acoustic classification and length estimation of krill
strength in situ, an acoustic resolution volume must be based on a single animal measurement. For small ... school- ing organisms, such as euphausiids, this criterion is seldom met. Therefore, in the Ross Sea ... and their equivalent radius can be estimated confi dently in the interval (amin – amax) where 100|δ| < 20 ... to 38 kHz is highly ‘tuned’ (error < 20%) to measur- ing sizes within the class from a = 1.6 to 6.0 mm ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 33–58 : Author(s): Azzali, M., I. Leonori and G. Lanciani
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Catch per unit effort (CPUE) data from the early years of commercail krill fishing operations in the Atlantic sector of the Antarctic
Paper Title: Catch per unit effort (CPUE) data from the early years of commercail krill fishing ... 1975/76 to 1987/88. Comparisons are carried out between subareas in single years, between years ... between subareas, years and shelf/oceanic regions. Obviously, a consistent pattern of CPUE values does ... not occur over time for the entire area. High average CPUE were observed in the years 1975/76 and 1980/81 ... indices: (i) total catch/total hours for the split-year (1 July to 30 June); (iii) mean monthly ... ; (b) from a scientific (IKMT) net sampling survey. Siege1 et al. 10 20 30 40 50 60 70 Total length ... (mm) 10 20 30 40 50 60 70 Total length (mm) Figure 5: Overall length-frequency distributions ... 12 10 15 20 25 30 35 40 45 50 55 60 65 Total length (mm) (f) Season 1985186 10 15 20 25 30 35 ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 31–50 : Author(s): Siegel, V., V. Sushin and U. Damm
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Report on fish by-catch on exploratory fishing in Divisions 58.4.1 and 58.4.2
undertaken in Divisions 58.4.1 and 58.4.2 during the 2012 to 2018 seasons. Fish by-catch comprised 14 species ... or groups of species. In 2018, by-catch represented 12% of the total catch (43 tonnes over 307 tonnes ... where Macrourus CPUE also increased in the last 3 years. Macrourus CPUE was 23kg/1000 hooks in average ... in Divisions 58.4.1 and 58.4.2 during the 2012 to 2018 seasons. Fish by-catch comprised 14 species or groups ...
Meeting Document : WG-FSA-18/28 : Author(s): C. Péron, P. Yates, D. Maschette, C. Chazeau, P. Ziegler, D. Welsford, N. Gasco and G. Duhamel
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WG-CSD-87
on Fish Stock Assessment WG-CSD-87/13 Conservation approaches: the implications of Article II United ... of Member States WG-CSD-87/20 Technical group – explanatory note WG-CSD-87/4 Rev. 1 List of Documents WG-CSD ...
Meeting
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Continuation of multi-Member research on the Dissostichus eleginoides exploratory fishery in 2018/19 in Division 58.4.3a by France and Japan
their exploratory fisheries in Division 58.4.3a over the coming years in order to contribute to the tagging program ... exploratory fishery in 2018/19 in Division 58.4.3a by France and Japan Approval: Approved Secretariat ... to continue their exploratory fisheries in Division 58.4.3a over the coming years in order to contribute ... Continuation of multi-Member research on the Dissostichus eleginoides exploratory fishery in 2018 ...
Meeting Document : WG-SAM-18/08 : Author(s): Delegations of France and Japan
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A first step towards modelling the krill–predator dynamics of the Antarctic ecosystem
to the hypothesis of a krill surplus in the mid-20th century is described, and the information on population ... , together with suggested further areas for investigation. Amongst the key inferences of the study ... surplus in the mid-20th century is described, and the information on population and trend levels that has ... , and the plausibility of the results and the assumptions on which they are based is discussed, together with suggested ... of this species declined substantially over the first 20 years of the fishery, from 1970 to 1990 (Kock, 1992 ... . Crabeater seals have hardly been harvested, but 750 animals were taken per year in Region A for 11 years ... . The background to the hypothesis of a krill surplus in the mid-20th century is described, and the information ... , together with suggested further areas for investigation. Amongst the key inferences of the study ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 217–277 : Author(s): Mori, M. and D.S. Butterworth
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Fishery Report 2015: Exploratory fishery for Dissostichus spp. in Subarea 48.6
the CCAMLR fishing season is represented by the year in which that season ended, e.g. 2015 represents ... the 2014/15 CCAMLR fishing season (from 1 December 2014 to 30 November 2015 ... and/or the location of those catches (SC-CAMLR-XXXIII, paragraph 3.68). Those years that include quarantined data ... 275 15 291 2014 538 145 9 154 2015 538 189 1 190 q Some catch data in these years is now ...
Document : Site Section: Publications
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A survey of fish stocks in the Heard Island and McDonald Islands region in the 1999/2000 season and a comparison of the abundances of selected species with those obtained in previous surveys
, varying by a factor of 2-3 between years, but C. gunnari abundance can vary by a factor of about 20 ... years, but C. gunnari abundance can vary by a factor of about 20 between years. This is the result ... between years. This is the result of occasional strong year classes entering the fishery and dominating ... the population for about 2 years before disappearing, as has been documented in other locations. Author ...
Meeting Document : WG-FSA-00/40 : Author(s): R. Williams, A. Constable, T. Lamb and E. van Wijk (Australia)
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The direct impact of fishing and fishery-related activities on marine life in the CCAMLR Convention Area with particular emphasis on longline fishing and its impact on albatrosses and petrels – a review
Abstract: Finfishing started in the Southern Ocean more than 30 years ago at South Georgia ... probably only a few animals per year. Author(s): Delegation of Germany Title: The direct impact ... Finfishing started in the Southern Ocean more than 30 years ago at South Georgia and Iles Kerguelen ... birds these effects have been minor, very local and killed probably only a few animals per year. ...
Meeting Document : SC-CAMLR-XIX/BG/11 : Author(s): Delegation of Germany
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Assessment models for Antarctic toothfish (Dissostichus mawsoni) in Subarea 88.2 SSRU 88.2E for the years 2002–03 to 2010–11
resulted in a 30% higher estimate of initial biomass than for the 2009 base case. The main reason ... different years. Monte-Carlo Markov Chain (MCMC) diagnostics suggested no evidence of non-convergence in any ... separately to avoid potential problems with localised stock depletion. However, over the past 2–3 years ... for Antarctic toothfish (Dissostichus mawsoni) in Subarea 88.2 SSRU 88.2E for the years 2002–03 to 2010–11 ...
Meeting Document : WG-FSA-11/44 : Author(s): S. Mormede, A. Dunn and S.M. Hanchet (New Zealand)