Resultados de la búsqueda

1. An assessment of the exploratory fishery for Dissostichus spp. on BANZARE Bank (CCAMLR Division 58.4.3b) based on fine-scale catch and effort data

   fine-scale catch and effort data held by CCAMLR for BANZARE Bank, as well as descriptive analyses of ... biological data submitted by scientific observers on board vessels in the fishery. Results of a Leslie ... species in catches in one ground for the first time. Incomplete reporting of biological information for by ... -catch species by on-board scientific observers was noted, limiting meaningful analysis of patterns in by ... of fine-scale catch and effort data held by CCAMLR for BANZARE Bank, as well as descriptive analyses ... of biological data submitted by scientific observers on board vessels in the fishery. Results of a ... of biological information for by-catch species by on-board scientific observers was noted, limiting ... meaningful analysis of patterns in by-catch catch and effort. Further research, particularly research ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 55–78 : Autor(es): McKinlay, J.P., D.C. Welsford, A.J. Constable and G.B. Nowara

2. A compilation of parameters for ecosystem dynamics models of the Scotia Sea – Antarctic Peninsula region

   of mean school size and number of schools sighted divided by twice the product of search distance ... treatment of krill dynamics: the krill–predator–fi shery model (KPFM), developed by Dr G. Watters (NOAA ... constant mean mass, whereas the spatial multi-species operat- ing model (SMOM) developed by Dr É. Plagányi ... and Prof. D. Butterworth (University of Cape Town, South Africa) directly models krill biomass ...

   Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 1–25 : Autor(es): Hill, S.L., K. Reid, S.E. Thorpe, J. Hinke and G.M. Watters

3. Status of krill target strength

   aggregations of live euphausiids and should not be affected by a frequent cause of bias in single-animal ... should not be affected by a frequent cause of bias in single-animal measurements, namely thresholding ... 102 ! :/ interest in krill biomass, as witnessed, for example, by the scale of international ... recent references on scattering by live euphausiids that avoid or otherwise address the effect of ... back scattering cross section by the square of the length of the body, provided of course that the ...

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

4. The survivorship of rays discarded from the South Georgia longline fishery

   sea surface by the Chilean fishing vessel Isla Sofía in May and June 2003 during the toothfish fishing ... . Endicott and D.J. Agnew Renewable Resources Assessment Group Imperial College, Royal School of Mines ... surface by the Chilean fi shing vessel Isla Sofía in May and June 2003 during the toothfi sh fi shing ... relates to the preliminary fi ndings of a survival experiment reported by Endicott et al. (2000). The fi ... by Francis and Smith (2002) from tagged skate recaptures in the Ross Sea indicated that skates can ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 155–164 : Autor(es): Endicott, M. and D.J. Agnew

5. A first step towards modelling the krill–predator dynamics of the Antarctic ecosystem

   Antarctic is summarised briefly, and the central role played by krill emphasised. The background to the ... University of Cape Town Rondebosch 7701, South Africa Current address: Institute of Cetacean Research 4 ... University of Cape Town Rondebosch 7701, South Africa Abstract The history of human harvests of seals ... , whales, fish and krill in the Antarctic is summarised briefly, and the central role played by krill ... taken from the end of the 18th century, followed by whales at the start of the 20th century. More ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 217–277 : Autor(es): Mori, M. and D.S. Butterworth

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

   be explained by possible experimental error, and which was therefore attributed to real differences ... difference which was regarded as too large to be explained by possible experimental error, and which was ... frequency-dependence of E. superba target strength is one made by Foote et al. (1990) on live animals at ... South Georgia. Target strengths at 38 and 120 kHz were estimated by measuring the strength of the back ... Research Institute, Cape Town, South Africa. The study was part of a broader investigation into krill ...

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

7. Some comments on the procedure for testing estimators of krill abundance which utilise survey data

   spatial correlation by placing krill swarms at random within larger aggregation features termed ... 1981 FIBEX survey by MV SA Agulhas. However, evidence of model misspecification remains. Further work ... spatial correlation by placing krill swarms at random within larger aggregation features termed ... 1981 FIBEX survey by MV SA Agulhas. However, evidence of model misspecification remains. Further work ... Town, Rondebosch 7700, South Africa Sea Fisheries Research Institute, Private Bag X2, Roggebaai 8012 ... density trend. Substitution of a fully random survey design by a systematic one would be a satisfactory ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 191–205 : Autor(es): Butterworth, D.S., D.L. Borchers and D.G.M. Miller

8. Towards an initial operational management procedure for the krill fishery in Subareas 48.1, 48.2 and 48.3

   headings. Assessment of resource status is provided by the CPUE ‘Composite Index’ proposed by the Workshop ... . Thereafter TACs may increase by C r % per annum. However, this increase may be suspended or reversed in any ... by others for alternative forms and parameter values (or their probable ranges) for the krill ... provided by the CPUE "Composite Index" proposed by the Workshop on the Krill CPUE Simulation Study ... level (CPUEref) calculated as the average CPUE over that time. Thereafter T ACs may increase by cr ... procedures should be made in a similar fashion to that set out in the paper. Suggestions by others for ... operationnelle de l'Article Department of Applied Mathematics, University of Cape Town, Rondebosch 7700, South ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 189–219 : Autor(es): Butterworth, D.S.

9. Possible effects of different levels of krill fishing on predators – some initial modelling attempts

   suggested by the Joint Meeting of CCAMLR's Working Group on Krill (WG-Krill) and Working Group for the ... as functions of krill abundance, by considering a krill dynamics model incorporating recruitment ... . Butterworth Department of Applied Mathematics, University of Cape Town Rondebosch 7700. South Africa R.B ... . Thonnson Department of Zoology, University of Cape Town Rondebosch 7700, South Africa Abstract An ... initial attempt is made to develop the modelling framework suggested by the Joint Meeting of CCAMLR's ... , estimates are made of the parameters of predator survival rates as functions of krill abundance, by ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 79–97 : Autor(es): Butterworth, D.S. and R.B. Thomson

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

    debris found in association with seabirds at sub-Antarctic Marion Island for the period May 1996 to April ... found. Prior to this study only three hooks (all from the southern bluefin tuna longline industry) had ... been found in association with seabird nests at Marion Island. Fishery-related marine debris was found ... ) marine debris was found most frequently in association with grey-headed albatrosses and southern giant ... Ornithology University of Cape Town Rondebosch 7701, South Africa Abstract Marine debris found in ... follows a decrease in body size, and can be explained by the fact that most of the fishing gear found on ... ingested by certain species of seabirds. Albatrosses and petrels (procel- lariiformes), because of their ... incidental mortality caused by this fishing practice (Croxall and Gales, 1997). Less well documented is the ...

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

Páginas