Résultats de la recherche
-
Assessment of stone crab (Lithodidae) density on the South Georgia slope using baited video cameras
of 719-1518 m around the sub-Antarctic island of South Georgia. Four species of lithodid (Anomura ... to the baits of which Paralomis formosa was the most abundant. Using arrival rate at baits ... , predictions of odour plume size and observations of walking speed the abundance of the stone crab Paralomis ... observed in the 4.9 m2 field of view exceeding 50 within 200 minutes on three occasions. Current speed was ...
Meeting Document : WG-FSA-03/77 Text : Auteur(s): M.A. Collins, C. Yau, F. Guillfoyle, P. Bagley, I. Everson, I.G. Priede and D. Agnew (United Kingdom)
-
Growth of mackerel icefish (Champsocephalus gunnari) and age-size composition of population in subarea of the South Georgia
were studied for different periods. The analysis of age composition of icefish in subarea 48.3 showed ... that the catches consisted mainly of individuals of 2-4 age groups, where more than 60% were ... represented by fish of two contiguous age groups. It was shown that in the 1980s during a number of years the ... class. These year classes appeared against a background of the intensive icefish fishery, and krill ...
Meeting Document : WG-FSA-SAM 03/7 : Auteur(s): K.V. Shust and E.N. Kuznetsova (Russia)
-
Foraging response of Antarctic fur seals to changes in the marine environment
Abstract: This study examined the relative contribution of environmental variation and the ... seasonal demands of pup rearing on the foraging behaviour of female Antarctic fur seals Arctocephalus ... recorders measured the diving behaviour of 72 individuals during a total of 385 foraging trips totalling ... 1964 d at sea. The frequencies of krill, fish and squid in the diet were estimated from prey items ...
Meeting Document : WG-EMM-99/35 : Auteur(s): D.J. McCafferty, I.L. Boyd, T.R. Walker and R.I. Taylor (United Kingdom)
-
ASSESSMENT OF PATAGONIAN TOOTHFISH POPULATION IN THE NORTH OF SUBAREA 48.4 USING DATA FROM A FOUR-YEAR TAGGING EXPERIMENT
Abstract: 1. The bycatch TAC of 12 tonnes of macrourids was reached in 2008/09 triggering the ... early closure of the fishery with only 58.9 t of the 75 t TAC of D. eleginoides taken; 2. The target ... in 2008/09, slightly under the target of 375 for the full 75 tonnes of catch; 3. There were 29 D ... . eleginoides tag returns in 2008/09, bringing the total from all seasons up to 54 tag recaptures; 4. A total of ...
Meeting Document : WG-FSA-09/17 : Auteur(s): J. Roberts and D.J. Agnew (United Kingdom)
-
THE ISSUE OF NON-COMPLIANCE WITH CCAMLR TAGGING PROGRAM
Exploratory Fisheries), the flag States of fishing vessels participating in exploratory fisheries are ... responsible for ensuring the tagging of Dissostichus spp., tag recovery and correct reporting. At CCAMLR XXVI ... (2007), “the Commission requested the Secretariat to annually prepare and submit a table for SCIC’s ... consideration containing data on individual Dissostichus spp. tagged and released, and the tagging rate reported ...
Meeting Document : CCAMLR-XXVII/BG/22 : Auteur(s): Delegation of Australia
-
Population assessment of Patagonian toothfish in the north of Subarea 48.4 – 2010 update
Abstract: The target tagging rate of 5 fish per tonne was exceeded by both vessels, with 232 D ... . eleginoides tagged and released in 2009/10, bringing the total to 1,547 in all seasons; There were 18 D ... . eleginoides tag recaptures in 2009/10, a total of 72 in all seasons; The length-frequency of 2009/10 captures ... is consistent with the theory that the bulk of the biomass is dominated by a small number of cohorts ...
Meeting Document : WG-FSA-10/39 : Auteur(s): J. Roberts and D. Agnew (UK)
-
Feasibility of lead-radium dating the otoliths of blackfin icefish (Chaenocephalus aceratus) and ocellated icefish (Chionodraco rastrospinosus)
otoliths from these fishes were small and the number of otoliths available low, a whole otolith application ... was necessary as a first look at lead-radium levels. The application was successful as a first step in ... determining the parameters of future applications that would lead to a validation of age. In the current study ... , sample mass for the pooled otolith samples was low (~0.4 g). This finding, coupled with low radium-226 ...
Meeting Document : WG-FSA-10/17 : Auteur(s): A.H. Andrews, M. La Mesa and J. Ashford (USA)
-
The ICES Benchmark Protocol
Abstract: The ICES Benchmark Protocol is a review process for evaluating the data and analyses ... that form the basis of ICES management advice for a stock. The review examines stock structure, fishery ... characteristics, biological and assessment data, stock assessment and projection methodology. The review is ... conducted outside of the ICES annual assessment and advice environment. It includes experts from outside of ...
Meeting Document : WG-SAM-14/16 : Auteur(s): C. Darby (United Kingdom)
-
Towards the development of an assessment of stock abundance for Subarea 88.2 SSRUs 88.2C–G
Abstract: This paper frames a discussion for improving the assessment of toothfish abundance for ... SSRUs 88.2C–G. We initially provide a characterisation of the fishery and a summary of available tagging ... fish have been recaptured. It is likely that the lack of recaptures of tagged fish in this region has ... been caused primarily by the poor spatial overlap of released tagged fish with subsequent fishing ...
Meeting Document : WG-FSA-14/59 : Auteur(s): S.M. Hanchet and S.J. Parker (New Zealand)
-
Spatio–temporal dynamics in maturation and spawning of Patagonian toothfish Dissostichus eleginoides on the subantarctic Kerguelen Plateau
eleginoides in the Heard Island and McDonald Islands (HIMI) fishery on the Kerguelen Plateau in the Indian ... Sector of the Southern Ocean based on gonads and otoliths collected between years 2004–2015, and using ... throughout the late autumn and winter months of May–August, and spawning activity is concentrated on slopes ... along the west and south of the plateau around HIMI at depths of 1500–1900m. Comparison between ...
Meeting Document : WG-FSA-17/P04 : Auteur(s): P. Yates, P. Ziegler, D. Welsford, J. McIvor, B. Farmer and E.Woodcock