Resultados de la búsqueda

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

   . 14. Dissostichus eleginoides were caught in 20 out of the 70 hauls in the 2013 survey and were ... in Subarea 48.3 carry a CCAMLR scientific observer who collects a range of data, including ... in the CASAL input files are set to zero in all instances. Stock assessment status 20 ... . 10 30. If the by-catch of skates and rays or macrourids exceeds 1 tonne in any one haul or set ...

   Document : Site Section: Publications

2. Estimating krill recruitment and its variability

   recruits in a population sampled by a net haul survey. Preliminary results from a series of five net haul ... surveys in the South Atlantic and the Indian Ocean sectors of the Southern Ocean give a mean recruitment ... rate for 1+ krill (the ratio of the number of krill aged one year to the number of krill aged one year ... for 2+ krill (the ratio of the number of two-year-old krill to the number aged two and above) from ... ), taking the second group with mean length in the range 30 to 38 mm as age class 2, are: Number of ... in those years, or the survey results are not representative for this age class. If the former is ... estimates used in these analyses. I am also grateful to the large number of scientists who have laboured ... la Mare 10 9 8 7 6 h Y .M 5 a 4 3 2 1 0 0 10 20 30 40 50 60 70 Length ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 55–69 : Autor(es): de la Mare, W.K

3. New CCAMLR SISO Observer Manuals and updated longline logbook

   data collection for a focussed skate tagging programme in the Ross Sea, beginning in the 2020 season ... requirements. In addition a new version of the observer longline logbook is presented, with additions to allow ...

   Meeting Document : WG-EMM-2019/75 : Autor(es): CCAMLR Secretariat

4. Review of length-weight relationships for Antarctic krill

   927mg 913mg 931 mg 912mg 860mg 796mg Data for February were collected in different years and ... of one month (Table 4). Because spawning may occur in different months during different years ... for wet wei~ht (in mg) and total length (AT in mm). Month Several years Several years ... indicate the timing of spawning varies from year to year. The seasonal variation in krill weight clearly ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 145–155 : Autor(es): Siegel, V.

5. Potential interactions between wandering albatrosses and longline fisheries for Patagonian toothfish at South Georgia

   continental shelf in areas very similar to where the longline fishery operates and are therefore at serious ... risk from these fisheries at this time. Until fishing methods which do not catch albatrosses are in ... comprehensive use, we recommend that the South Georgia longline fishery for D. eleginoides should be managed in ... , satellite-tracking, South Georgia, wandering albatross INTRODUCTION Over the last 20 years wandering ... Island for their assistance in the research on satellite tracking of D. exulans in recent years ... m and deeper. - - and fishing took place in most months of the year with between 1 and 12 ... South Georgia continental shelf in areas very similar to where the longline fishery operates and are ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 101–110 : Autor(es): Croxall, J.P. and P.A. Prince

6. An update of the ageing program for Patagonian toothfish (Dissostichus eleginoides) at the Australian Antarctic Division, including a summary of new data available for the Integrated Stock Assessment for the Heard Island and the McDonald Islands fishery (Division 58.5.2)

   greater than 20 years) available for use in the current assessment (Ziegler et al., 2014).   Author(s ... in relation to the laboratory processing of otoliths and quality control in the assignment of fish ... capacity for ageing and at a lower cost per otolith. Greatest efficiency gains have been made in the ... laboratory, with otoliths now set in smaller resin blocks that take much less time to section, and in quality ...

   Meeting Document : WG-FSA-14/45 : Autor(es): B.M. Farmer, E.J. Woodcock and D.C. Welsford (Australia)

7. An assessment of the merits of length and weight measurements of Antarctic krill Euphausia superba

   predictors of wet or dry weight in Antarctic krill Euphausia superba Dana are standardised with new data on ... biomass based on acoustic data. An alternative approach is examined in which length and additional ... biological data are assessed in terms of decreases in the residual variance of relationships. We have ... identified key sources of variability where relatively small increases in the effort of analysis result in ... ) Abstract Published relationships of various length measurements as predictors of wet or dry weight in ... alternative approach is examined in' which length and additional biological data are assessed in terms of ... decreases in the residual variance of relationships. We have identified key sources of variability where ... relatively small increases in the effort of analysis result in large improvements in the precision of ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 371-373 : Autor(es): Morris D.J., J.L. Watkins, C. Ricketts, F. Buchholz, and J. Priddle

8. Krill population biology during the 1991 Chilean Antarctic krill fishery

   419 hauls. In Area A, a unimodal size frequency distribution was found; the size range was between 30 ... / Description:  Population biology of Antarctic krill, Euphausia superba, was studied from samples taken in 1991 ... spermatophore had a 36.5 mm TL, 80% of the females with spermatophores had a TL larger than 45 mm. In Area B, a ... juvenile specimens between 20 and 39 mm TL. Females comprised 47.1%, males 40% and juveniles 12.9%. Of the ... : Total catch (tonne/mile) in both areas during the three time periods. 50 % 60 40 30 20 10 ... ' 59°55,3' 2.60 58 14 21:30 21.02.91 62°08,1' 59°51,5' 2.40 50 20 09:30 22.02.91 62°08,9' 59°56,4 ... °17,6' 2.70 50 30 18:20 03.03.91 62°26,0' 61 °17,8' 2.80 40 39 08:30 04.03.91 62°33,5' 61 °22,7' 2.90 ... % 50 40 20 o V / / '" Males Females Juveniles Figure 7: Sex composition of E. superba in the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 223–235 : Autor(es): Mujica R., A., E. Acuña S. and A. Rivera O.

9. Measurements of sound-speed and density contrasts of Antarctic krill (Euphausia superba) on board RV Kaiyo Maru

   Abstract:  In order to calculate the target strength of Antarctic krill (Euphausia superba) using ... -density contrasts between the animal and the surrounding water are required. Sound-speed and mass-density ... of krill were measured during the Antarctic surveys conducted by the Japanese RV Kaiyo Maru in 1999 ... South Shetland Islands in February 2000. These were 21.7mm and 1.049, and 45.1mm and 1.043 in the Ross ...

   Meeting Document : WG-EMM-08/56 Rev. 1 : Autor(es): Y. Takao, H. Yasuma, R. Matsukura, K. Amakasu and M. Naganobu (Japan)

10. Aggregation patterns of pelagic predators and their principal prey, Antarctic krill, near South Georgia

    differences in foraging strategies. Published in Journal of Animal Ecology (1993) 62, 000-000 Author(s):  R.R ... is an explicit consideration of the separation in space between swarms of krill and aggregations of ... predators that feed upon krill. 2. Our data were collected in February 1986, during a systematic shipboard ... seals were distributed in a strikingly non-random fashion at sea near South Georgia; their ...

    Meeting Document : WG-CEMP-93/13 : Autor(es): R.R. Veit (USA), E.D. Silverman (USA) and I. Everson (United Kingdom)

Páginas