Search results
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Review of length-weight relationships for Antarctic krill
Regression Coefficient Size Range Number Dominant Adult Reference a b (mm) ofKrill Maturity Stages October ... Coefficient Size Range Number Dominant Adult Reference a b (mm) ofKrill Maturity Stages Feb/Mar 0.00010 ... Size Range Number Dominant Adult Reference a b (mm) ofKrilI Maturity Stages M 0.0034 3.1761 3-61 all ... (1980). Month Regression Coefficient Size Range Number Dominant Adult Reference a b (mm) of ... Paper Title: Review of length-weight relationships for Antarctic krill Abstract / Description ... euphausiid species), are listed for ash-free dry weight, dry weight, and wet weight. The accuracy of length ... taken into account. The influence of seasonal changes on length-weight relationship parameters is ... discussed. Recommendations for possible uses of reviewed length-weight relationships are presented. File ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 145–155 : Author(s): Siegel, V.
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The choice of procedure for deciding when to close fisheries regulated by CCAMLR: a simulation model
=O.5% of T AC par day • 1% ofTAC/day O.S J:I 2"10 of TAC par day Cl C . 'c:;~ -;:f- C3 '" ~ = 0.6 ... , and show local minima which occur at different values ofL with different catch rates. 90 Tableau ... Paper Title: The choice of procedure for deciding when to close fisheries regulated by CCAMLR: a ... deciding the closure date for fisheries monitored by the Secretariat of CCAMLR, have been difficult to ... implement because of the variation in catch rates shown by the fisheries. Non-fluctuating random and ... fluctuating random catch histories are simulated and the performance of four models for making closure ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 81–97 : Author(s): Agnew, D.J.
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Results of fish stock assessment survey, South Georgia, December 1987 - January 1988
Paper Title: Results of fish stock assessment survey, South Georgia, December 1987- January 1988 ... complements earlier surveys in the same area and showed that most of the stocks are continuing to decline ... . Notothenia rossii is showing no signs of recovery and Champsocephalus gunnari is likely to continue declining ... measures aimed at rebuilding the stocks of N. rossii and maintaining the other fish resources in the ... largest tow was at station 86, yielding 428 kg. This represents 13% of the catch of this species. Most of ... form a smaller mode at about 32 cm in 1987/88. Fifty percent of the fish in the 22 - 25 cm size range ... are mature (Lso) (Kock et al. 1985). based on survey catches 44% of the population was at or below ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 19-52 : Author(s): McKenna, Jr., J.E. and S.B. Saila
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Length-based assessments revisited – why stock status and fishing mortality of long-lived species such as toothfish cannot be inferred from length-frequency data alone
Paper Title: Length-based assessments revisited – why stock status and fishing mortality of long ... / Description: In many of CCAMLR’s new and exploratory fisheries, stock assessment techniques are still in ... development. The failure of the tag-recapture program to provide robust assessments in many areas and doubts ... and fishing mortality from length-frequency data alone. In this paper, a number of length-based stock ... over two or three decades (Constable et al., 2000). At the core of this approach are rules for ... the length at first capture Lc and an esti- mate of L∞ are required. In addition to steady-state ... of weight-at-age and numbers-at-age under zero fish- ing mortality is maximised. Cope and Punt ... could theoretically be fished at a target spawning biomass of 40% relative to an unfished population ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 57–73 : Author(s): Ziegler, P.E., D.C. Welsford and A.J. Constable
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Management and uncertainty: the example of South Georgia
Paper Title: Management and uncertainty: the example of South Georgia Abstract / Description ... : Decisions on fishery management are often made with some degree of uncertainty in scientific advice. Such ... to consider ways in which CCAMLR can improve its ability to take decisions in the face of uncertainty ... . From an examination of Articles IX 2(f) and XV 2(e, d) of the CCAMLR Convention it follows that a ... the stock of Notothenia rossii is at an extremely low level. Proposals have been made in both the ... level at which they could provide sustained yields of y thousand tons per year, and that any other ... Figure 2 of the working party report it appears that mortality has increased from 0.11 to 0.76, i.e. at ... view would be to challenge the general interpretation, and look at some of the inconsistencies of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 341-353 : Author(s): Gulland, J.A.
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Low genetic diversity and temporal stability in the Antarctic toothfish (Dissostichus mawsoni) from near-continental seas of Antarctica
(Dissostichus mawsoni) from near-continental seas of Antarctica Abstract / Description: This study presents ... data on the DNA analysis of recent (2011–2013) samplings of Antarctic toothfish (Dissostichus mawsoni ... analysis of the most informative subset of nuclear genetic markers of SNP variation presented in Kuhn and ... Gaffney (2008), do not support genetic differentiation of samples from the Ross Sea. Discrepancies in the ... late 1990s and the fleet use mainly bottom-set longlines at depths of 1 200–1 800 m. Defining the ... -water) stage occurs when fish reach 100 cm in length and migrate to deep waters and stay at a depth of ... cycle protocol: a pre- liminary denaturation of DNA at 94°C for 1 min was followed by syntheses of DNA ... products: melt- ing at 92°C for 20 sec, annealing of primers at 55°C for 40 sec, DNA syntheses at 72°C for ...
Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 1–9 : Author(s): Mugue, N.S., A.F. Petrov, D.A. Zelenina, I.I. Gordeev and A.A. Sergeev
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Comparative feeding ecology of Patagonian toothfish (Dissostichus eleginoides) in the southwestern Atlantic
/slope, the occurrence of fish prey was 94.3OiOF for males and 95.6%F for females and consisted mainly ... Paper Title: Comparative feeding ecology of Patagonian toothfish (Dissostichus eleginoides) in ... the southwestern Atlantic Abstract / Description: The diet of Patagonian toothfish (Dissostichus ... Argentinian continental shelf/slope, the length of D. eleginoides ranged from 30 to 95 cm total length (TL ... juvenile and adult stages, and ranged between 18 and 212 cm TL. The diets of fish of various sizes and both ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 105–124 : Author(s): García de la Rosa, S.B., F. Sánchez and D. Figueroa
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Seabird by-catch by autoline vessels: do line setters increase the sink rate of integrated weight longlines?
Paper Title: Seabird by-catch by autoline vessels: do line setters increase the sink rate of ... . A trial was conducted in the Ross Sea to determine the effectiveness of line setters in increasing ... the sink rates of IW longlines. Time-depth recorders were deployed on lines set with and without a ... line setter using a paired-treatment design. Sink rates of longlines set with and without a line setter ... distance, which amounted to about 100 s of setting time (at 6 knots 3.1 m s–1), was chosen to ensure the ... the anchor at the beginning of lines. The water entry times of each TDR were recorded to the ... structure. For each of these last two sub-models, separate variance parameters at each depth were combined ... of IW longlines is that IW lines (which are heavier than UW lines) deployed loosely and at a ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 107–114 : Author(s): Robertson, G., J. Williamson, M. McNeill, S.G. Candy and N. Smith
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Acoustic estimates of krill biomass in the Elephant Island area: 1981–1993
Paper Title: Acoustic estimates of krill biomass in the Elephant Island area: 1981–1993 Abstract ... / Description: Acoustic estimates of krill biomass in the vicinity of Elephant Island are presented for the ... years 1981 to 1993 (with the exception of 1982 and 1986). Estimates for 1981 to 1991 are based on ... previous reports adjusted for the recently proposed definition of krill target strength (Greene et al ... Demer At the 1992 meeting of the CCAMLR Working Group on Krill (WG-Krill) a table of historical ... 1985. Klindt used the BIOMASS (1986) definition of target strength at 120 kHz adjusted to 150 kHz ... corresponding to the difference in target strength at 120 kHz using the modal krill lengths for each of the ... corresponding to the difference between the BIOMASS (1986) definition of target strength at 50 kHz and a ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 1–5 : Author(s): Hewitt, R.P. and D.A. Demer
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The Patagonian toothfish (Dissostichus eleginoides) fishery in the Kerguelen Islands (Indian Ocean sector of the Southern Ocean)
the CPUE (Figure 4). Trawl CPUE fluctu- ated a good deal between 1983 and 1991, ranging from 1 tonne/hour ... (Indian Ocean sector of the Southern Ocean) Abstract / Description: Patagonian toothfish (Dissostichus ... recently with longliners. This is the oldest fishery targeting D. eleginoides in the Indian Ocean sector of ... local overfishing. The expansion of the bathymetric range of the fishery to increasingly deeper waters ... distribution, timing and area of spawning, and movements between geographical sectors) on the adult section of ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 1–25 : Author(s): Lord, C., G. Duhamel and P. Pruvost