Résultats de la recherche
-
Comparison of bootstrap methods for assessment of mackerel icefish (Champsocephalus gunnari) in CCAMLR Statistical Subarea 48.3 based on the ground fish survey
Abstract: The existing bootstrap used in the assessment of icefish biomass in CCAMLR subarea 48.3 ... was compared to an alternative rescaled bootstrap to compare the performance of the methods. The ... differences between the method were small (less than 5%) except for slightly lower 5%iles in 2002 and 2004 in ... the rescaled bootstrap. Author(s): T. Earl and N. Fallon Title: Comparison of bootstrap methods for ...
Meeting Document : WG-SAM-17/36 : Auteur(s): T. Earl and N. Fallon
-
A revised Krill Trawl logbook for the 2019 season
Abstract: During the 2017 Scheme of International Scientific Observation workshop (WS-SISO), the ... data collection requirements for krill observers were discussed, with recommendations tabled in the WS ... -SISO Convener’s Report (SC-CAMLR-XXXVI/08) for amendments to the krill e-logbook used by SISO observers ... . This paper summarizes the changes to the e-logbook for proposed introduction in the 2019 season. Author ...
Meeting Document : WG-EMM-18/39 : Auteur(s): CCAMLR Secretariat
-
Precautionary, ecosystem-based management for the Antarctic krill fishery: a work in progress
Abstract: The Antarctic krill fishery is expanding at a time when the Antarctic Peninsula is ... enhance its precautionary management of the krill fishery in line with Convention objectives. This paper ... provides an update on the krill fishery; discusses the consideration of climate change in krill fisheries ... compliance as they relate to the krill fishery. The paper concludes with a number of recommendations to make ...
Meeting Document : SC-CAMLR-XXXVII/BG/17 : Auteur(s): Submitted by ASOC
-
Can the chemistry of otolith nuclei determine population structure of Patagonian toothfish Dissostichus eleginoides?
Abstract: Otolith nucleus chemistry resolved the population structure of Patagonian toothfish ... (Dissostichus eleginoides), an exclusively marine species, along the Patagonian Shelf and North Scotia Ridge out ... to South Georgia in the Southern Ocean. Concentrations of 55Mn, 88Sr, and 137Ba, ratioed to 42Ca ... , showed a sharp population boundary in the vicinity of the Polar Front, between South Georgia and the ...
Meeting Document : WG-FSA-06/P2 : Auteur(s): Ashford, J.R., A.I. Arkhipkin and C.M. Jones
-
Monitoring and managing the effects of environmental change on toothfish assessments
Abstract: This paper presents a ‘first-step’ proposal for CCAMLR to consider the effects of ... environmental conditions that are maintained over a number of years, which includes the effects of global ... climate change. The effects of environmental variability and change on toothfish population dynamics and ... productivity are largely unknown and are difficult to predict given our current understanding of the Southern ...
Meeting Document : WG-SAM-18/22 : Auteur(s): M. Pinkerton, A. Dunn, S. Mormede and S. Parker
-
Review of biological characteristics of the Antarctic toothfish (Dissostichus mawsoni) and its distribution in Antarctic waters
Abstract: Results of published studies on the biology, biomass and distribution of the Antarctic ... toothfish (Dissostichus mawsoni) were reviewed. The review focused on those aspect of the species which are ... of importance for the assessment of its biomass and identification of its stocks. The trophodynamics ... of D. mawsoni are mentioned only in brief. Most published materials refer to studies conducted in the ...
Meeting Document : WG-FSA-98/37 : Auteur(s): Secretariat
-
Natural mortality rate in the mackerel icefish (Champsocephalus gunnari) around South Georgia
Abstract: Information on natural mortality rates of the mackerel icefish, Champsocephalus gunnari ... , from the period prior to large scale commercial harvesting is discussed. Methods based on population ... age structure and growth parameters are used. It is concluded that only in the three earliest years ... , 195 1, 1964 and 1966, do the data reflect an unexploited population. The best estimate of M from ...
Meeting Document : WG-FSA-97/05 : Auteur(s): Everson, I.
-
Development of a fine-scale model of land-based predator foraging demands in the Antarctic
Abstract: The CCAMLR Secretariat has been requested to provide annual calculations of the catch ... of krill within the critical period-distance of land-based predators in Subareas 48.1 and 48.2 (100km ... from colonies, December- March). This index of the overlap of predators and the fishery is unsuitable ... is developed, which is based on a detailed model of the supposed functional interaction between these ...
Meeting Document : WG-Joint-94/08 : Auteur(s): D.J. Agnew and G. Phegan (Secretariat)
-
Research program on resource potential and life cycle of Dissostichus species from the Subarea 88.2 A in 2015-2018
fishing seasons 2015-2018. The present program aims to recapture tagged fishes released during the ... implementation of the previous research program took place in 2010-2012 fishing seasons and investigate resource ... potential and life cycle of Dissostichus species within the eastern part of the Ross Sea over shelf and ... continental slope within the Subarea 88.2 A. Author(s): Delegation of the Russian Federation Title: Research ...
Meeting Document : WG-SAM-15/21 : Auteur(s): Delegation of the Russian Federation
-
Proposed observer logbooks for the 2019 longline and finfish trawl fisheries
Abstract: The first CCAMLR Scheme of International Scientific Observation workshop (WS-SISO) was ... fisheries (see SC-CCAMLR-XXXVI/08). This paper summarises the proposed changes to the observer logbooks for ... the longline and finfish trawl fisheries, and outlines their introduction leading up the proposed ... adoption for the beginning of the 2019 fishing season. Author(s): CCAMLR Secretariat Title: Proposed ...
Meeting Document : WG-FSA-17/03 : Auteur(s): CCAMLR Secretariat