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1. Estimation of krill (Euphausia superba) mortality and production rate in the Antarctic Peninsula region

   ratio of 0.88 to 0.94 for different years. The exchange rate of water masses and krill biomass within ... Antarctic Peninsula region Abstract / Description:  A net sampling survey for krill was carried out by RV ... data of an identical survey with RV Polarstern in 1987/88. Seasonal variation between summer and winter ... resulted a rate of Z = 0.88 (1989/90) and Z = 0.96 (1987/88). Production was estimated and resulted a P/B ... Antarctic Peninsula survey area for different years. 30 • PN87/88 29 oME89/90 28 z27 .E 26 25 ... population with an unknown age structure. 2. MATERIAL AND METHODS A net sampling survey for krill was ... results of 1989/90 further showed a steady decline in number ofkrill for the older age classes. From ... curve analysis for the particular years 1987/88 and 1989/90. As appears from the figure data points ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 159–176 : Автор(ы): Siegel, V.

2. Status of krill target strength

   -animal measurements of target strength for live euphausiids and euphausiid-related species, made under ... Paper Title:  Status of krill target strength Abstract / Description:  Empirical estimates for the ... aggregations of live euphausiids and should not be affected by a frequent cause of bias in single-animal ... measurements, namely thresholding. Theoretical estimates for the target strength are derived from the deformed ... assuming specific sets of physical and orientational parameters, for which there is an empirical basis ... of review attempted here may consequently be justified for gathering together diverse, generally ... the scattering from individuals. Accordingly, the state of an animal is defined by a unique ... of the South Orkney Islands at 20 kHz. For krill of mean lengths from 43.0 to 47.1 mm the effective ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 101–126 : Автор(ы): Foote, K.G., D. Chu and T.K. Stanton

3. Consideration of major issues in ecosystem monitoring and management

   / Description:  This paper outlines the requirements of an ecosystem approach to the management of Southern ... Ocean resources and highlights the need for information on harvested and dependent species, their ... interactions and the manner in which their populations vary naturally. Large-scale interactions are catered for ... means of CEMP. The overlap between fishing and predator foraging is being monitored. A mechanism for ... 10000 15000 0 10 20 30 40 50 60 70 80 90 100 Year Po pu la tio n si ze Recruitment fails twice ... rates can 223 Ecosystem monitoring and management 0 20 40 60 80 100 0 2 4 6 8 10 Age at ... 40 50 60 70 80 90 100 Year Po pu la tio n si ze Recruitment fails twice at random each decade ... recruitment is randomly distributed between 1 000 and 2 000. From year 20 onwards for two randomly selected ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 213–232 : Автор(ы): Everson, I

4. The use of patent databases to predict trends in the krill fishery

   / Description:  The fishery for Antarctic krill (Euphausia superba) caught 210 000 tonnes in 2009/10 with ... Secretariat so that it can annually update a register of krill-related patents which will be of use for ... 20 30 40 50 60 70 80 90 19 76 19 78 19 80 19 82 19 84 19 86 19 88 19 90 19 92 19 94 ... 10 15 20 25 30 19 76 19 78 19 80 19 82 19 84 19 86 19 88 19 90 19 92 19 94 19 96 19 ... Applicant control over, and protection of, the patented tech- nology for 20 years (IP Australia, 2010 ... ) there was an increasing trend in the later years for non-traditional fishing nations to be involved ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 135–144 : Автор(ы): Foster, J., S. Nicol and S. Kawaguchi

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

   provide an estimate that is unaffected by confounding effects mainly due to recruitment variation, but ... also possibly due to age-dependent mortality and commercial fishing. File:  14everson.pdf ... ). Additional information is available from Frolkina and Dorovskikh (1991), who provide an age/length key for ... to compare the numbers at age in successive years and thus derive an estimate of the mortality of a ... Age (years) Figure 1: Age-frequency distributions for Chainpsocephalus gunnari. Data from Olsen ... - E a, f F 0 8 6 -5 -10 -1 5 -20 3 4 5 6 7 8 9 Age (years) Olsen Frolkina Kock ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 245–257 : Автор(ы): Everson, I

6. A stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea Region incorporating multi-year mark-recapture data

   , and tagging has been an ongoing requirement for all vessels fishing in the fishery since 2004 ... catch-at-age data. This is the first published stock assessment of toothfish in the Ross Sea region. It ... Sea Region incorporating multi-year mark-recapture data Abstract / Description:  An exploratory ... model was developed for Antarctic toothfish in the Ross Sea region that incorporates multi-year release ... north fishery selectivity 10 20 30 40 50 Age Age Age ... Age Age Age 10 20 30 40 50 10 20 ... - estimates the weight of age data (see also Appen- dix A for further details). In an alternative run, the ... –2009. Mormede et al. 44 for each year and fishery in order to obtain scaled age frequencies of ...

   Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 39–62 : Автор(ы): Mormede, S., A. Dunn and S.M. Hanchet

7. Evaluating the impact of multi-year research catch limits on overfished toothfish populations

   additional fisheries removals for research purposes needs to be evaluated against the risk that such catches ... assessed in this study indicate that, where a stock has been depleted to at or below 20% of the median ... Paper Title:  Evaluating the impact of multi-year research catch limits on overfished toothfish ... 30 tonnes per year for 5 years) to assumptions about selectivity (scenarios 7 to 9), size-at ... ) Parameter set 1 945 10% 0, 15, 30, 45, 60, 75, 90 As per Table 1 2 893 15% " " 3 841 20% " " 4 782 ... 25% " " 5 730 30% " " 6 677 35% " " 7 As per scenario 3 20% 30 As per Table 1 except age fully ... an approximately linear response between stock status 20 years after historical over- fishing ceased ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 47–55 : Автор(ы): Welsford, D.C

8. Antarctic krill and ecosystem management – from Seattle to Siena

   (2002 – this volume), with the three papers documenting developments during CCAMLR’s first 20 years of ... / Description:  This paper outlines CCAMLR’s development of a management approach for the Antarctic krill ... to be consistent with the objectives of the CAMLR Convention, particularly its Article II. Emphasis ... approach developed in order to calculate a precautionary catch limit for the krill fishery in various ... illustrated in Figure 5. Most recently an age-structured krill population model has been constructed for ... exploitation, over a 20-year period of harvesting, should be equal to 10%’. This approach required an ... the three papers documenting developments during CCAMLR’s fi rst 20 years of existence. Résumé Il ... which infl uenced CCAMLR’s efforts to develop an ecosystem-based management regime for the Antarctic ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 175–212 : Автор(ы): Miller, D.G.M

9. Scientific observations in CCAMLR fisheries – past, present and future

   / Description:  CCAMLR has the primary competency for managing fishing south of the Antarctic Polar Front ... observers on board fishing vessels has assumed prominence in the collection of essential data for fisheries ... designed to gather and validate fishery-related information essential for assessing the status of target ... principles outlined in Article II of the CAMLR Convention (CCAMLR, 2004a, Part 1) embody an ‘ecosystem’ and ... Measure 41-01 (2004), paragraph 7) (see CCAMLR, 2004b). 0 10 20 30 40 50 60 1996 1997 1998 1999 ... Longline D. eleginoides 48.3 16 7 43 1997 Longline D. eleginoides 48.3, 58.6, 58.7, 88.1 30 27 90 Trawl ... . Medium Collection of fish scales and otoliths for age determination. Medium Monitoring the location and ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 81–98 : Автор(ы): Sabourenkov, E.N. and E. Appleyard

10. Movement, growth and available abundance to the fishery of Dissostichus eleginoides Smitt, 1898 at Heard Island, derived from tagging experiments

    for the management of toothfish stocks and that trends in abundance derived from these experiments ... (approximately 80 mg Sr per kg of fi sh) to mark their otoliths for later verifi cation of the age- reading ... . In each simulation year, the biomass is recalculated by adding an amount for annual growth and ... la bl e nu m be rs (m ill io ns ) 1998 1999 2000 2001 Year 0 10 20 30 40 50 Pr ed ic ... te d nu m be rs (m illi on s) 1998 1999 2000 2001 Year 50 40 30 20 10 0 P re di ct ...

    Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 33–48 : Автор(ы): Williams, R., G.N. Tuck, A.J. Constable and T. Lamb

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