Search results

1. Preliminary tag-recapture based population assessment of Antarctic toothfish in Subarea 48.4

   Abstract:  The stock of Antarctic toothfish (D. mawsoni) in CCAMLR subarea 48.4 was conservatively ... would imply a 2016/17 yield of 40.6 tonnes compared to the 2015/16 TAC of 39 tonnes. Author(s):  S ... of Antarctic toothfish in Subarea 48.4 Approval:  Approved Secretariat Workflow Status:  Content ...

   Meeting Document : WG-FSA-16/39 : Author(s): S. Wright, N. Walker, M. Söffker and T. Earl

2. Preliminary assessment of mackerel icefish Champsocephalus gunnari in Subarea 48.3 based on the 2017 groundfish survey

   Abstract:  A stratified bootstrap of icefish catch density based on the UK 2017 demersal fish ... survey catch rate data indicated a biomass of 91 531 tonnes (lower one sided 5th percentile: 47 424 ... CCAMLR harvest control rule lead to catch limits (TAC) of 4 733 tonnes for 2017/18 and 3 269 tonnes for ... 2018/19. Author(s):  T. Earl Title:  Preliminary assessment of mackerel icefish Champsocephalus gunnari ...

   Meeting Document : WG-FSA-17/47 : Author(s): T. Earl

3. A new method to produce high resolution maps of effort and catches in longline fisheries

   Abstract:  Fishing vessels using ~10 km long bottom longline operate in the French EEZ of ... a new method to better take into account the information associated to the path of the line instead ... of only the mid-point as commonly used to calculate catch rates. Author(s):  N. Gasco, C. Péron, C ... . Chazeau, A. Martin, P. Pruvost and G. Duhamel Title:  A new method to produce high resolution maps of ...

   Meeting Document : WG-FSA-18/43 : Author(s): N. Gasco, C. Péron, C. Chazeau, A. Martin, P. Pruvost and G. Duhamel

4. Preliminary assessment of mackerel icefish Champsocephalus gunnari in Subarea 48.3 – Based on the 2019 Groundfish Survey

   Abstract:  A stratified bootstrap of icefish catch density based on the UK 2019 demersal fish ... survey catch rate data indicated a biomass of 53,124 tonnes (lower one sided 5th percentile: 32,399 ... CCAMLR harvest control rule lead to catch limits (TAC) of 3,225 tonnes for 2019/20 and 2,132 tonnes for ... 2020/21. Author(s):  T. Earl Title:  Preliminary assessment of mackerel icefish Champsocephalus gunnari ...

   Meeting Document : WG-FSA-2019/30 : Author(s): T. Earl

5. Comparison of census methods for black-browed albatrosses breeding at the Ildefonso Archipelago, Chile

   Abstract:  Although a breeding population of black-browed albatrosses has been known to exist at ... scientifically defendable methods. To estimate population size, and examine the accuracy and practicality of ... pairs of black-browed albatrosses bred at the Ildefonso archipelago. After the Falkland Islands/Malvinas ... , South Georgia and Diego Ramirez, the Ildefonso Archipelago holds the fourth largest population of black ...

   Meeting Document : WG-FSA-06/12 : Author(s): G. Robertson, K. Lawton (Australia), C.A. Moreno (Chile), R. Kirkwood (Australia) and J. Valencia (Chile)

6. Using carapace measurements to determine the sex of Antarctic krill (Euphausia superba)

   validating the use of discriminant functions to determine sex of krill based on carapace length and width and ... derived from mature krill in years following significant recruitment events with large proportions of ... immature krill resulted in significant bias towards male krill and an overestimation of krill length. We ... measurements to determine the sex of Antarctic krill (Euphausia superba) Approval:  Approved ...

   Meeting Document : WG-EMM-05/26 : Author(s): J.D. Lipsky, M.E. Goebel, C.S. Reiss and V. Loeb (USA)

7. Development of the krill stock in the elephant island region during the 1996/97 season

   . Krill and salps were present at almost all of the stations, other epipelagic zooplankton species were ... /96, the present juvenile age group 1 +, does not repeat the very successful recruitment of the ... good recruitment of this year-class. At the same time the salp abundance was above average, but still ... one order of magnitude lower than in the salp bloom years 1992/93 and 1993/94. Author(s):  Siegel, V ...

   Meeting Document : WG-EMM-97/16 : Author(s): Siegel, V.

8. Demography of Antarctic krill in the Lazarev Sea (Subarea 48.6) and the Elephant Island area (Subarea 48.1) in 2004

   after taking substantial day/night differences in the catches into account. Recruitment indices of one ... and high, but different values for R2. Spatial distribution of krill density and size/age classes is ... discussed for the Lazarev Sea. Information are given on the development of maturity stages and “re ... -juvenation processes” after the spawning season. Distribution and density of krill calyptopis and furcilia ...

   Meeting Document : WG-EMM-04/23 : Author(s): V. Siegel (Germany), V. Loeb (USA), B. Bergström (Sweden), S. Schöling (Germany), M. Haraldsson (Sweden), J. Kitchener (Australia), M. Vortkamp (Germany)

9. A preliminary assessment and revised growth model of mackerel icefish (Champsocephalus gunnari) in Division 58.5.2, based on results from the 2017 random stratified trawl survey

   vicinity of Heard Island and the McDonald Islands during April 2017. This paper provides an updated growth ... , abundance and yield in Division 58.5.2 to the west of 79 o 20’ E using standard CCAMLR methods (CMIX and ... estimates of Welsford (2010), however Generalized Yield Model projections indicated that the updated growth ... parameters resulted in only a small impact on yield.  Catches of 526 t in the 2017/18 season and 395 t in the ...

   Meeting Document : WG-FSA-17/22 : Author(s): D. Maschette, P. Burch, P. Yates and D. Welsford

10. Simulating performance of trend analysis for setting catch limits in exploratory toothfish research plans

    qualitative analysis of trends in biomass estimated in each research block and a series of simple decision ... developed and tested as a matter of priority for WG-SAM-18. We formalised and codified the rules and ... developed a simulation approach to examine the performance of the trend analysis rules for scenarios with ... and S. Mormede Title:  Simulating performance of trend analysis for setting catch limits in ...

    Meeting Document : WG-SAM-18/23 : Author(s): S. Hoyle, S. Parker, A. Dunn and S. Mormede

Pages