Résultats de la recherche
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By-catch of morid cods (Gadiformes: Moridae) in the CCAMLR area and adjacent areas during commercial fishing and research surveys
distributions, size composition and abundance of morids in the CCAMLR and adjacent areas. The main goal is to ... detection of areas and depths of their aggregations, by reveal of presence/absence of spatial and vertical ... migrations and by study of their seasonal and multi-annual variations. Results will be used for preparation ... of conservation measures allowing for preservation these vulnerable by-catch species from irreparable ...
Meeting Document : WG-FSA-16/12 : Auteur(s): A. Orlov and I. Gordeev
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Summary of monitoring and research effort and preliminary results from the 2019 Scotia Sea krill monitoring survey with FV Cabo de Hornos
Association of Responsible Harvesting Companies (ARK) and manned with personnel from the Institute of Marine ... Research to carry out a significant part of the 2019 Scotia Sea large scale krill monitoring. All sections ... of the large scale survey area were visited, and about 80 % of the coverage planned for the vessel ... . In addition, deployment of four acoustic moorings and 9 replicate measurements on board of krill ...
Meeting Document : WG-EMM-2019/46 : Auteur(s): G. Skaret, M. Martinussen, G. McCallum, R. Pedersen, J. Rønning, A.L. Donoso, O.A. Bergstad and B.A. Krafft
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ESTIMATION OF MANAGEMENT REFERENCE POINTS CONSISTENT WITH THE CATCH TRIGGER LEVEL FOR THE ANTARCTIC KRILL FISHERY IN AREA 48
of 620,000 tonnes. Projections were run with various increased levels of recruitment variability to ... analyse the sensitivity of the estimates of the reference points to recruitment variability. The estimates ... of F and SSB reference points for the krill stock in Area 48 consistent with the catch trigger level ... comparison, the F and SSB reference points for the precautionary catch limit of 5.61 million tonnes are 0.186 ...
Meeting Document : WG-EMM-11/17 : Auteur(s): T. Peatman, J. Moir Clark, D.J. Agnew (UK)
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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 : Auteur(s): M. Mori (Japan) and D.S. Butterworth (South Africa)
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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 : Auteur(s): S.J. Baird (New Zealand)
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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 : Auteur(s): K.-H. Kock (Germany) and I. Everson (United Kingdom)
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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
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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 : Auteur(s): K. Reid (United Kingdom)
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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 : Auteur(s): K. Reid and J.P. Croxall (United Kingdom)
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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 : Auteur(s): I.L. Boyd and A.W.A. Murray (United Kingdom)