Search results

1. Estimates of fish stock biomass around South Georgia in January/February 1985

   in stock size to 10 – 20% of that estimated before the onset of heavy fishing. In C. gunnari the fishery ... is dependant on the abundance of the recruiting year class. Conservation measures adopted by CCAMLR in 1984 ... – 20% of that estimated before the onset of heavy fishing. In C. gunnari the fishery is dependant ... on the abundance of the recruiting year class. Conservation measures adopted by CCAMLR in 1984 are discussed ... to 128 ,000 t can thus partly be explained by the recruitment of one or two abundant year ... size to 10 ~ 20% of that estimated before the onset of heavy fishing. In C. gunnari the fishery ... is dependant on the abundance of the recruiting year class. Conservation measures adopted by CCAMLR in 1984 ... estimations de biomasse indiquent une reduction de 10-20% du stock - 2 - evalue avant le debut de la ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 1-32 : Author(s): Kock, K.-H.

2. Killer whale (Orcinus orca) and sperm whale (Physeter macrocephalus) interactions with longline vessels in the Patagonian toothfish fishery at South Georgia, South Atlantic

   whale pods were generally small (2–8 animals), while solitary animals and larger pods (>15 animals ... , although smaller groups (2–3 animals) were also relatively common. Interactions with killer whales were ... . Killer whale pods were generally small (2–8 animals), while solitary animals and larger pods (> ... ;15 animals) occurred less frequently. Sperm whales were most often solitary when interacting ... 78 24.5 20 6.3 J 712 30 4.2 119 16.7 14 2 K 346 12 3.5 18 5.2 7 2 L 238 8 3.4 167 70.2 2 0.8 ... %) or three (18%) animals together were also relatively common, but seven or more animals were only observed ... 6–10 7 0.8 11–15 21 11.3 >10 1 0.1 16–20 12 6.5 21–30 2 1.1 Table 4: The times at which ... at South Georgia also reported interactions between these two cetaceans during the past three years ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 111–126 : Author(s): Purves, M.G., D.J. Agnew, E. Balguerías, C.A. Moreno and B. Watkins

3. Quantification of Southern Ocean phytoplankton biomass and primary productivity via satellite observations and biogeochemical models (submitted to the 2008 Joint CCAMLR-IWC Workshop)

   , the marginal ice zone and open-ocean fronts. Their one-year time series of productivity confirmed that while ... number they calculated (based only on one year of data, 1997/98) was in their combined Weddell– Ross Sea ... . Strutton et al. 248 the two- to three-fold discrepancy between large- scale geochemical and more ... of mmolC m–2 or mgC m–2 per unit time (day or year). In this review, the term ‘model’ is reserved ... biogeochemical models for the Southern Ocean is presented, with a focus on those models that have been validated ... productivity is presented, focusing on the vertically generalised production model (VGPM) and more recent ... blooms is presented for the major provinces surrounding Antarctica. Some of the published information ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 247–265 : Author(s): P.G. Strutton, N.S. Lovenduski, M. Mongin and R. Matear

4. Spatially explicit population dynamics models for Antarctic toothfish in the Ross Sea region

   15 20 25 30 Age (years) 1.0 0.8 0.6 0.4 0.2 0.0 S el ec tiv ... assessment is biased low by 19–43%. Mormede et al. 20 one or the other of these methods are available ... (median of about 20 km after a year at liberty, see Parker et al., 2013), suggests that the assumption ... ‘year’ refers to the period in which most of the season occurs, e.g. the period 1 December 1996 to 30 ... Paper Title:  Spatially explicit population dynamics models for Antarctic toothfish in the Ross ... models were developed for the Antarctic toothfish (Dissostichus mawsoni) population in the Ross Sea ... . Movement was parameterised using preference functions based on spatially discrete environmental layers. The ... of the current single-area stock assessment. Simulations based on the three spatial distribution ...

   Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 19–37 : Author(s): Mormede, S., A. Dunn, S. Hanchet and S. Parker

5. Use of the Leslie stock depletion model for the assessment of local abundance of Patagonian toothfish (Dissostichus eleginoides)

   travaux sont proposes. An2 M3YYeHllR JIOKaJIbHblX ~ ~ K O H O M ~ P H O C T ~ ~ B 3HaYeHURX YJIOBa 3a ... B JIOKaJlA30BaHHbIX pafi0~aX B TeYeHMe IlepHOJJOB, KaK MAHAMYM, TpeX Awefr. Pe3yJlb~a~b1 yKa3aJIM Ha TO, YTO ... from the former Soviet Union dominated the fishery for the first three years. Since the start ... and adjacent waters. These estimates were, in some years, substantially different from the reported catch ... Paper Title:  Use of the Leslie stock depletion model for the assessment of local abundance of ... used to examine local patterns in catch per unit effort (CPUE) in the longline fisheries for Patagonian ... in localised areas for periods of at least three days. The results suggest that there is greater ... potential for application of the model in some areas than in others, but in general there is no sufficiently ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 55–77 : Author(s): Parkes, G., C.A. Moreno, G. Pilling and Z. Young

6. Vertical migrations of mackerel icefish (Champsocephalus gunnari) on the South Georgia shelf

   for commercial concentrations of C. gunnari in years of high abundance of the species (1982/83, 1983/84 and 1986 ... for clarification of survey techniques used in stock assessment. For a number of years scientists of AtlantNIRO have ... from research vessels which had been fishing for commercial concentrations of C. gunnari in years ... . For a number of years scientists of AtlantNIRO have been conducting trawl surveys for C. gunnari during ... from research vessels which had been fishing for commercial concentrations of C. gunnari in years ... used in stock assessment. For a number of years scientists of AtlantNIRO have been conducting trawl ... HCnOJib30BaHbl ,l{aHHbie Hayl.IHO-HCCJie,l(OBaTeJibCKHX cy ,l(OB, o6JiaBJIHBaBIIIHX npOMbiCJIOBbie CKOnJieHH51 ... H MHrpHpyeT B TOJIIIlY BO,l(bl, ,l(OCTHf'a51 10pH30HTOB 50-60 M. liHK nHTaHH51 npHXO,l(HJIC51 Ha HOl.IHbie ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 3–14 : Author(s): Frolkina, J.A. and V.I. Shlibanov

7. Marine debris and fishing gear associated with seabirds at sub-Antarctic Marion island, 1996/97 and 1997/98: in relation to longline fishing activity

   , while five seabird carcasses (three wandering albatross chicks, one white-chinned petrel chick ... found entangled in fishing gear, while five seabird carcasses (three wandering albatross chicks, one ... entangled with two toothfish hooks attached to each other by a single piece of monofilament nylon. One ... an estimated total volume of 150 cm? Three carcasses (two wandering albatross chicks and one southern giant ... AND CONCLUSIONS Entanglements Incidental Finds Four seabird entanglements were observed during the two years ... carcasses (three wandering albatross chicks, one white-chinned petrel chick and a southern giant petrel ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 85–96 : Author(s): Nel, D.C. and J.L. Nel

8. Line weights of constant mass (and sink rates) for Spanish system Patagonian toothfish longline vessels

   , with each basket containing two lengths of hook line. The lengths of hook line are tied together to form ... in bun- dles by netting bags stitched together from trawler net. This is an antiquated line-weighting ... ). Briefly, the Spanish sys- tem uses two lines set in parallel – a heavy haul- ing line (‘retenida ... the ends of the branch/connecting lines, and a weight is attached to the end of each one (Figure ... no maintenance. An experiment was conducted on a Spanish-system longline vessel to determine the ... shaped steel weights weighing 5 kg would be an appropriate substitute for 8.5 kg rock weights ... Paper Title:  Line weights of constant mass (and sink rates) for Spanish system Patagonian ... -system longline vessels to attach 8.5 kg weights at 40 m intervals on longlines to minimise interactions ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 93–106 : Author(s): Robertson, G., C.A. Moreno, E. Gutiérrez, S.G. Candy, E.F. Melvin and J.P. Seco Pon

9. Age estimation and maturity of the ridge-scaled macrourid (Macrourus whitsoni) from the Ross Sea

   work on this species. Von Bertalanffy growth models assuming different growth by sex and by year-within ... length-at-maturity (38.8 and 46.4 cm) and mean age-at-maturity (10.6 and 13.6 years) are presented ... Bertalanffy growth models assuming different growth by sex and by year-within-sex were fitted separately ... (38.8 and 46.4 cm) and mean age-at-maturity (10.6 and 13.6 years) are presented for males and females ... 0 10 20 30 40 50 60 Age (years) 100 80 60 40 20 0 100 ... of the standard normal distribution R es id ua ls (b) 20 30 40 50 60 70 80 -2 -1 0 1 2 Fitted values ... –3 –2 –1 0 1 2 3 20 30 40 50 60 70 80 Fitted values Quantiles of the standard ... -3 -2 -1 0 1 2 3 -2 -1 0 1 2 Quantiles of the standard normal distribution R es id ua ls (b) 20 30 40 50 60 70 80 ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 291–303 : Author(s): Marriott, P.M., M.J. Manning and P.L. Horn

10. An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island

    for the Heard Plateau is 275 mm. The growth curve gives a mean length for fish aged one year less than the age ... respectively. The effects of a constant catch level (in tonnes) over a 20-year period were evaluated ... period (20 years is used here) should not be increased by more than 0.05. Combining ... over a 20-year period, and as such they can be continued for some years without the need for annual ... tonnes for the Heard Plateau and 18 tonnes for Sliell Bank. An assessment based on the results of a ... populations on the Heard Plateau are sufficiently different from those on Shell Bank for them to be managed ... survey conducted at the end of the 1997 fishing season would allow for a catch limit on the Heard Plateau ... Paper Title:  An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island ...

    Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 79–101 : Author(s): de la Mare, W.K., R. Williams and A.J. Constable

Pages