Search results

1. A potential feedback approach to ecosystem-based management: Model Predictive Control of the Antarctic krill fishery

   . The operating model and all processes within the feedback loop have a nominal time‐step of one year ... ≥ 0 is the proportion of harvested species biomass in area j ≠ i that moves into area i in one time-step, whereas Tii ... ≥ 0 is the proportion of harvested species biomass in area i that moves out of area i in one time-step. Harvested ... (2001), these values had to be adjusted so that the chance of population collapse in any one area ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 119–137 : Author(s): Hill, S.L. and M. Cannon

2. Measurements of differences in the target strength of Antarctic krill (Euphausia superba) swarms at 38 kHz and 120 kHz

   differences in the mean back-scattering strength of swarms simultaneously insonified at these two frequencies ... strength at these two frequencies. The results are in good agreement with recent experimental work ... simultaneously insonified at these two frequencies in studies off the South Orkneys and Elephant Island in March ... was therefore attributed to real differences in average target strength at these two frequencies. The results ... target strength is one made by Foote et al. (1990) on live animals at South Georgia. Target strengths ... in the two integrator systems. One integration was done between 5 and 100 m over an interval in which ... relationship at 50 kHz from the one used for 120 kHz data. The result was to raise target strengths at 50 kHz ... system where multi-channel echo-integration could be performed (Anon., 1986). In one system (System ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 75–86 : Author(s): Hampton, I.

3. The influence of bait quality on the sink rate of bait used in the Japanese longline tuna fishing industry: an experimental approach

   . The addition of a 20 g lead sinker to a conventional 20 g tuna hook reduced the sink time of bait bearing ... floated, however, even when thawed. The addition of a 20 g lead sinker to a conventional 20 g tuna hook ... m or one minute beyond the protection zone of the streamer line. The finding above highlights ... of added weight (sinkers) on the sink rates of bait. Lead sinkers weighing 10 g, 20 g, 30 g, 40 g and 50 ... and closed circles refer to thawed bait. lwashi 80 S $60 ! - C . r40 i7, 20 ... of the fish prevented them from sinking. With saba, 80% of small baits and 20% of large baits floated when ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 123–129 : Author(s): Brothers, N., A. Foster and G. Robertson

4. Comparison of age readings from scales and otoliths of the Patagonian toothfish (Dissostichus eleginoides) from South Georgia

   years. This is very close to the maximum age of 22.8 years calculated from Taylor's formulae which ... on the remaining 56% showed that differences in age estimates between the two methods were not significant ... . The maximum age of D. eleginoides was found to be 24 years. This is very close to the maximum age of 22.8 ... years calculated from Taylor's formulae which relates maximum observed age to natural mortality ... 1 to 18. Cassia 0 8 8 8 8 8 8 8 m w m 2 z ? & 80 T Age 5 " @ ! \ ! , L L 20 ... O o o o o o o o o 0 0 0 0 0 0 m w m 2 z z : 80 20 0 -Uo 0 0 0 0 0 0 0 m w m 2 z z z Age ... L, = 207.01 cm, K = +0.0748 and to = -0.2898. The maximum age of D. eleginoides was found to be 24 years ... . This is very close to the maximum age of 22.8 years calculated from Taylor's formulae which relates maximum ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 191–203 : Author(s): Cassia, M.C

5. Preliminary analyses of data collected during experimental phases of the 1994/95 and 1995/96 Antarctic crab fishing seasons

   at liberty for about one to five weeks. The recaptured crabs had minimum movement rates of 0.08 to 0.25 ... , but attempts were made to account for biased sampling of recaptured crabs and the movement of crabs away from ... crabs were recovered, and these crabs were at liberty for about one to five weeks. The recaptured crabs ... crabs and the movement of crabs away from their release sites. Density estimates from the mark-recapture ... , and these crabs were at liberty for about one to five weeks. The recaptured crabs had minimum movement rates ... and the movement of crabs away from their release sites. Density estimates from the mark-recapture data were ... servir a estimer l'abondance des crabes lorsque l'on Ptudie des secteurs plus etendus et que les ... 3 ~ a n a 1 rosopxT o TOM, Y T O 661~10 661 H ~ U ~ J I ~ C O O ~ ~ ~ ~ H ~ I M 3KCTpanOnMpOBaTb JlOKanbHbIe OUeHKH ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 141–159 : Author(s): Watters, G

6. Preliminary study on nesting Adélie penguins disturbance by unmanned aerial vehicles

   on each type of behaviour and number of different types of behaviour displayed by one bird during ... of different types of behaviour displayed by one bird during the observation periods were compared ... 2 m further away. Each recording lasted 18 to 20 minutes. Control group data recording (breeding colony ... the piston engine UAV was further away, and the noise level decreased, only 20% of birds exhibited ... and distribu- tion has been used as one of the most important indication of ecosystem status and change (e.g ... of behaviour and number of different types of behaviour displayed by one bird during the observation periods ...

   Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 1–16 : Author(s): Korczak-Abshire, M., A. Kidawa, A. Zmarz, R. Storvold, S.R. Karlsen, M. Rodzewicz, K. Chwedorzewska and A. Znój

7. Results of the CCAMLR Antarctic fish otoliths/scales/bones exchange system

   / Description:  An exchange system was established among Members of CCAMLR to compare age determinations ... of agreement in age determination was highest for scales of juvenile N. rossii and for otoliths of juvenile ... and less experienced ones. File:  14-Kock.pdf ... An exchange system was established among Members of CCAMLR to compare age determinations ... the same age (e.g. 5 and 5) but also when one of the investigators only gave an approximation (e.g ... in determining the age of the species; one investigator (2) was less experienced. Age classes 4 to 12/13 were ... investigators (1 and 2) were experienced and one (3) was less experienced. Age classes 3 to 7 were identified ... of the investigators were experienced (1 and 3), one was experienced in ageing C. gunnari by fin ray sections ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 197–226 : Author(s): Kock, K.-H.

8. Food consumption by predators in a CCAMLR integrated study region

   consumption of seabird predators is provided. This model is a development of earlier ones used in the South ... consumption of seabird predators is provided. This model is a development of earlier ones used in the South ... procedure is based on an activity cycle which can be one, two or three years long within which there may ... on the IBM 360 at Cambridge University. The program formed the basis of two papers, one referring solely ... species complete one breeding cycle in one year, wandering, grey-headed and light-mantled sooty ... according to the data input. The dietary composition is also assumed to vary over a one-year period ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 489–519 : Author(s): Croxall, J.P., C. Ricketts and A.G. Wood

9. Protecting young fish and spawning aggregations of Champsocephalus gunnari in Subarea 48.3 (South Georgia): a review

   Regulations and Minimum Size Limits One of the most commonly used approaches to increasing the age at first ... with an increase in the age at first capture of C. gunnari from 2-3 years old to 3-4 years old, particularly ... shelf in some years, at certain times of the year may show a high degree of age specificity ... of 3- and 4-year-old fish (27-40 cm). One, however, was composed almost entirely of 1 and 2 year olds (about 12 ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 75–86 : Author(s): Parkes, G.B

10. Analysis of haul data from the South Georgia krill fishery

    neighbourhood. The range of measurements describing the fishery indicates that differences existed between years ... neighbourhood. The range of measurements describing the fishery indicates that differences existed between years ... OnKcaTenbHbrx no~a3a~enefi y~a3brsae.r Ha pa3n~q~11 Mexny ronam, npwveM 1995 6b1n 6onee ... , BbInOnHeHHbIM TpaynepaMH, ocyqecTsnaBmmm npoMbrcen KpHnrr B pafio~e K ) x ~ o f i l -eopr~u 3a nepr?on 1994 ... -1996 rr., 6b1n nonyYeH p r r ~ onEicaTenbHbIx no~a3a~enei i npoMbrcnosbIx 0IIepaqHfi ... fishing season at South Georgia occurs during the austral winter and spans the end of one CCAMLR ...

    Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 9–30 : Author(s): Trathan, P.N., I. Everson, E.J. Murphy and G.B. Parkes

Pages