Результаты поиска

1. Further progress on modelling the krill–predator dynamics of the Antarctic ecosystem

   Abstract:  This paper addresses work conducted on the Mori-Butterworth multi-species model of the ... Antarctic ecosystem subsequent to the Ulsan meeting of the IWC Scientific Committee. Points raised about the ... unable to fully utilise the primary production available. The precision of parameters estimated when ... of the model to available abundance estimates for crabeater seals. A list of topics for possible ...

   Meeting Document : WG-EMM-06/19 : Автор(ы): M. Mori (Japan) and D.S. Butterworth (South Africa)

2. Summary of the seabird and marine mammal observations during observed toothfish (Dissostichus spp.) longline fishing operations in CCAMLR Subareas 88.1 and 88.2

   Abstract:  Twenty-eight species of seabird were reported from observations during longline setting ... distribution of fishing effort was dictated by the presence of sea ice and there are differences in the seabird ... composition reported each year because of variation in the spatial distribution of the seabirds. At-sea ... identification of some species is difficult and some of the species that were reported from outside their known ...

   Meeting Document : WG-FSA-04/42 : Автор(ы): S.J. Baird (New Zealand)

3. Shedding new light on the life cycle of mackerel icefish in the Southern Ocean

   Atlantic and Indian Ocean sectors of the low-Antarctic region. Biological characteristics differ ... after they have spawned for 2 – 3 times. The number of eggs produced per gram of body weight is higher ... in the north. Stocks have declined in most parts of the distributional range due to the impact of ... fishing and due to natural causes. Increases in populations of Antarctic fur seals at South Georgia and ...

   Meeting Document : WG-EMM-03/4 : Автор(ы): K.-H. Kock (Germany) and I. Everson (United Kingdom)

4. First Annual Report of the CCAMLR Otolith Network, 2002

   Abstract:  This report presents results from the first exchange of otoliths under the auspices of ... , from 23 to 27 July 2001. The National Institute of Water and Atmospheric Research, Nelson, New Zealand ... ; Central Ageing Facility, Victoria Australia; and CQFE, each provided a sample of otoliths, processing and ... reading one randomly chosen otolith from each pair. Half of the remaining otoliths were sent to each of ...

   Meeting Document : WG-FSA-02/51

5. Growth of Antarctic krill Euphausia superba at South Georgia

   Abstract:  Antarctic krill Euphausia superba has a central role in the ecosystem of the Southern ... Ocean and knowledge of its growth rate is central to determining the factors influencing population ... dynamics. The length of Antarctic krill in the diet of Antarctic fur seals Arctocephalus gazella at South ... Antarctic Peninsula region. The effect of geographical variation in growth rate on the population structure ...

   Meeting Document : WG-EMM-01/18 : Автор(ы): K. Reid (United Kingdom)

6. Environmental response of upper trophic level predators reveals a system change in an Antarctic marine ecosystem

   environment have significant potential to affect populations of Antarctic krill Euphausia superba, a keystone ... Georgia. Indices of population size and reproductive performance showed declines in all species and an ... increase in the frequency of years of low reproductive output. Changes in the population structure of krill ... , and its relationship with reproductive performance, suggest that the biomass of krill within the ...

   Meeting Document : WG-EMM-01/21 : Автор(ы): K. Reid and J.P. Croxall (United Kingdom)

7. Monitoring a marine ecosystem using responses of upper trophic level predators

   Abstract:  1. This study examined the changing status of the marine ecosystem at the island of ... index (CSI). 2. Sensitivity analyses showed that missing values had a large effect upon the accuracy of ... the CSI but this effect was reduced if the individual variables were highly correlated. The level of ... correlation and proportion of missing values within the empirical data set were within the acceptable range ...

   Meeting Document : WG-EMM-01/25 : Автор(ы): I.L. Boyd and A.W.A. Murray (United Kingdom)

8. Estimation of the fishery–krill–predator overlap

   Abstract:  Work undertaken during the intersessional period has enabled better use of the krill ... fishery data, and a comparison between the three existing indices of fishery-krill-predator overlap used ... at nine levels of spatio-temporal resolution and using normal, exponential and uniform foraging ... the level of overlap in recent years (1995-98) than estimated with either the catch in the CPD or the ...

   Meeting Document : WG-EMM-99/11 : Автор(ы): Secretariat

9. Examination of the CCAMLR toothfish GLM

   Abstract:  Various elements of the Generalized Linear Model (GLM) used to standardise toothfish ... of 1992-1993 prosecuted by Russian vessels and the winter fishery of 1995 onwards prosecuted by other ... nationalities, coupled with the existence of the experimental fishery in 1994, lead us to suggest that future ... being no data for 1993, one of the most successful summer seasons. The relationship between CPUE and ...

   Meeting Document : WG-FSA-98/35 : Автор(ы): G.P. Kirkwood and D.J. Agnew (United Kingdom)

10. Preliminary assessment of toothfish in Subarea 48.3

    Abstract:  As with the 2009 assessment of Subarea 48.3, there is still uncertainty as to why there ... were high numbers of the 2001 cohort in commercial catches in 2009 onwards.  It is likely that it is ... due to a combination of a strong 2001 cohort and a change in selectivity for the commercial fleet, but ... it has not been possible to determine the relative importance of each explanation. Median log-normal ...

    Meeting Document : WG-FSA-11/33 Rev. 1 : Автор(ы): T. Peatman, R.E. Mitchell, G. Parkes and D.J. Agnew (United Kingdom)

Страницы