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1. Natural mortality rate in the mackerel icefish (Champsocephalus gunnari) around South Georgia

   South Georgia Abstract / Description:  Information on natural mortality rates of the mackerel icefish ... careful consideration of the data and available methods, several errors are noted in earlier estimates ... . Unfortunately, because none of the datasets are sufficiently comprehensive, it is impossible to unequivocally ... order to try to provide a reasoned estimate of M. MATERIAL AND METHODS Data on numbers of fish at ... of fish in the sample, the first fully recruited age is coded zero, the numbers at each coded age ... (1975): M = 0.28 (assuming N,W, max at 7 years). DISCUSSION Robustness of Estimators Seber (1982 ... criterion has not been met (Table 1). Unfortunately, the pattern of size at age reported by Olsen (1955 ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 245–257 : Author(s): Everson, I

2. Fishery Report 2015: Closed fishery for Dissostichus spp. in Divisions 58.4.4a and 58.4.4b

   and 35 tonnes in research block 5844b_2. It further requested that research activities be coordinated ...

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3. Fishery Report 2013: Exploratory fishery for Dissostichus spp. in Division 58.4.3b

   limits are also set so that they provide reasonable certainty that exploitation rates at the scale of ... comprised a much wider length range of 50–175 cm with a broad mode at approximately 80–130 cm (Figure 1b ... have been required to tag and release Dissostichus spp. at a rate of five fish per tonne of green ... at 4 078 tonnes. Applying a precautionary exploitation rate of 0.01 (consistent with assuming that ...

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4. Fishery Report 2015: Exploratory fishery for Dissostichus spp. in Division 58.4.3b

   catch 6. Reported catches of Dissostichus spp. over recent seasons peaked in 2006 at 361 tonnes ... vessels are set at a level intended to provide sufficient information (including sufficient recaptures of ... also set so that they provide reasonable certainty that exploitation rates at the scale of the stock ... a much wider length range of 50–175 cm with a broad mode at approximately 80–130 cm (Figure 1b ...

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5. Fishery Report 2016: Dissostichus spp. South Sandwich Islands (Subarea 48.4)

   cm at the beginning of the time series to 105–140 cm in 2013– 2016 (Figure 1b). A second mode of ... release Dissostichus spp. at a minimum rate of 5 fish per tonne of green weight caught (Table 2). All ... at liberty. 17. WG-FSA-09/17 and 09/18 provided a comprehensive analysis of the catch distribution ... one haul or set, then the fishing vessel must move at least 5 n miles away for a period of at least ...

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6. Fishery Report 2016: Exploratory fishery for Dissostichus spp. in Division 58.4.3b

   . Reported catches of Dissostichus spp. over recent seasons peaked in 2006 at 361 tonnes, exceeding the ... vessels are set at a level intended to provide sufficient information (including sufficient recaptures of ... also set so that they provide reasonable certainty that exploitation rates at the scale of the stock ... a much wider length range of 50–175 cm with a broad mode at approximately 80–130 cm (Figure 1b ...

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7. Fishery Report 2015: Dissostichus spp. South Sandwich Islands (Subarea 48.4)

   48.4 shows a shifting mode from 80–100 cm at the beginning of the time series to 105–140 cm in 2013 ... , vessels have been required to tag and release Dissostichus spp. at a minimum rate of 5 fish per tonne of ... Subarea 88.2 after three years at liberty. Table 3: Number of individuals of (a ... catch of Dissostichus spp. in any one haul or set, then the fishing vessel must move at least 5 n miles ...

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8. Fishery Report 2013: Dissostichus eleginoides South Georgia (Subarea 48.3)

   close to the sea floor at depths up to 2 000 m. Surface buoys indicate the presence of lines, and ... . The number of hauls (N) and the number of fish measured (n) in each year are given at the top of each ... 48.3. Tagging of D. eleginoides continued at a rate of 1.3 fish per tonne in 2013, with a total of 3 ... levels and current biomass levels (Table 4) show that the stock remains at around 53% of B0 in 2013 ...

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9. Fishery Report 2014: Dissostichus eleginoides South Georgia (Subarea 48.3)

   the sea floor at depths down to 2 000 m. Surface buoys indicate the presence of lines, and vessels ... each year are given at the top of each panel. Letters to the left of the panel (A, B and C) refer to ... skates and collate recapture data. Tagging of D. eleginoides continued at a rate of 1.3 fish per tonne ... proportions at length and numbers of tagged fish must be applied externally. Table 3: Length-specific ...

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10. Fishery report: Champsocephalus gunnari Heard Island (Division 58.5.2)

    ......................................................................... 6 Proportion of biomass-at-age...................................................... 6 4 ... using the bootstrap procedure. Population structure 7. The distribution of densities-at-age was ... year class at present. As yet, there is no sign of another strong year class in the area. Other ... Initial age structure 13. The proportion of density-at-age was derived from the CMIX program for ages 1 ...

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