Résultats de la recherche
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An ecosystem-based management procedure for krill fisheries: a method for determining spatially-structured catch limits to manage risk of significant localised fisheries impacts on predators
single-species assessment of yield, and a method for implementing the procedure. The decision rule for ... setting catch limits for a given harvest strategy has a straight forward expression of the target ... of predator-prey dynamics beyond that evident in the data. It is a natural extension of the current ... precautionary approach of CCAMLR for krill and can utilise existing datasets, including B0 surveys, local scale ...
Meeting Document : WG-EMM-15/36 : Auteur(s): A. Constable and S. Candy (Australia)
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A spatial multi-species operating model (SMOM) of krill–predator interactions in small-scale management units in the Scotia Sea
Abstract: A Spatial Multi-species Operating Model (SMOM) of the underlying krill-predator-fishery ... dynamics is developed in response to requests for scientific advice regarding the subdivision of the ... the potential impact of fishing on land-based predators. The model is intended to complement the ... of krill in each of the SSMUs, as well as the numbers of predator species in each of these areas. The ...
Meeting Document : WG-EMM-06/12 : Auteur(s): É. Plagányi and D. Butterworth (South Africa)
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A characterisation of the toothfish fishery in Subareas 88.1 and 88.2 from 1997/98 to 2005/06
nine years in Subarea 88.1 and for five years in Subarea 88.2 with a large amount of data collected on ... fished. The 2006 D. mawsoni catch was the second highest on record with a total of 3388 t against a ... combined catch limit of 3451 t. The subarea catch limit was almost reached in both Subarea 88.1 and 88.2 ... . The management of the SSRUs within the two subareas was changed for the 2006 season as part of a 3 ...
Meeting Document : WG-FSA-06/29 : Auteur(s): S.M. Hanchet, M.L. Stevenson and A. Dunn (New Zealand)
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A method for inferring movement rates of fish from mark–recapture data
Abstract: This paper presents methods to infer the rate of movement of fish that are marked ... , released, and subsequently captured. The information that is available is the location and date of the ... release and the recapture. In addition, the intensity of fishing effort (i.e. sampling) by location and ... time is known. The simplest approach is to make a frequency plot of the distance between each release ...
Meeting Document : WG-FSA-05/66 : Auteur(s): C. Wilcox (Australia)
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Population structure of icefish (Champsocephalus gunnari) in the South Georgia area (Antarctic)
Abstract: The living conditions of Champsocephalus gunnari in the eastern, western shelf areas of ... South Georgia and at Shag Rocks are different. The length-age structure of C.gunnari groupings ... inhabiting the areas at Shag Rocks and South Georgia is characterized with the lack of fish below 11 cm in ... length and older than 6-7 years (10-11 years in the South Georgia area) and considerably lower number of ...
Meeting Document : WG-FSA-04/40 : Auteur(s): Zh.A. Frolkina and I.A. Trunov (Russia)
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Population dynamics of the wandering albatross Diomedea exulans at Marion Island: long-line fishing and environmental influences
breeding population of the Vulnerable wandering albatross Diomedea exulans. The numbers of birds breeding ... result of both real changes in the size of the population and changes in the proportion of the population ... influenced by both environmental and anthropogenic effects are described. The proportion of first-time ... survival rates of breeding adults were negatively correlated with Japanese pelagic longline fishing effort ...
Meeting Document : WG-EMM-03/11 : Auteur(s): D.C. Nel, F. Taylor, P.G. Ryan and J. Cooper (South Africa)
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Peculiarities of icefish Champsocephalus gunnari (Channichthyidae) distribution in South Georgia area during the surveys made by STM Atlantida in 2000 and 2002
Abstract: Reasons of differences in icefish distribution and biomass assessment during two ... surveys made by STM “Atlantida” are revealed. Availability of large icefish concentrations in 2000 in the ... northwest shelf area in 10-100m layer resulted in formation of adult fish aggregations in water column. The ... the bottom even in dark hours of the day. During the two surveys, fry and immature fish occurred in ...
Meeting Document : WG-FSA-03/55 : Auteur(s): Zh.A. Frolkina, S.M. Kasatkina and N.N. Zhigalova (Russia)
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Atlas of coastal sea ice in eastern Antarctica
Abstract: The attached document provides information on an atlas of sea ice produced by the n. It ... vicinity of the CCAMLR Ecosystem Monitoring Program sites at Bechervaise Island near the Australian Station ... of Mawson, at Edmonson Point in the vicinity of the Italian Station of Terra Nova Bay and at Ross ... Island. The atlas is scheduled for release in August 2002. Here we provide a sample only of the contents ...
Meeting Document : WG-EMM-02/54 : Auteur(s): K. Michael, K. Hill, K. Kerry and H. Brolsma (Australia)
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Population dynamics of wandering albatrosses Diomedea exulans at sub-Antarctic Marion Island: longline fishing and environmental influences
Abstract: The Prince Edward Islands support the largest breeding population of the vulnerable ... Wandering Albatross Diomedea exulans. The number of birds breeding in this population has fluctuated over ... the past three decades and appears to be the result of both real changes in the size of the population ... and changes in the proportion of the population that attempts to breed in a given year. We describe ...
Meeting Document : WG-FSA-02/16 : Auteur(s): D.C. Nel, P.G. Ryan and J. Cooper (South Africa)
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The influence of environmental variables and mitigation measures on seabird catch rates in the Japanese tuna longline fishery within the Australian Fishing Zone, 1991–1995
Abstract: Long term fisheries observer data were used to analyse the influence of a range of ... environmental variables and mitigation measures upon catch rates of seabirds in the Japanese pelagic longline ... were set during summer, in southern areas of the zone, and during daylight hours. However ... , interpretation of changes in catch rates resulting from the use of mitigation measures or from weather effects ...
Meeting Document : WG-FSA-98/32 : Auteur(s): N. Brothers, R. Gales and T. Reid (Australia)