Résultats de la recherche

1. A quantified Bayesian maximum entropy estimate of Antarctic krill abundance across the Scotia Sea and in small-scale management units from the 2000 CCAMLR survey

   Abstract:  We present the results of an alternative method of estimating krill abundance, and ... producing maps of krill distribution, from the data collected during the 2000 CCAMLR survey of the Scotia ... unsurveyed off-transect portions of the survey area were found by interpolation, and thus values for total ... inferred. The MaxEnt formalism allows an objective choice of the parameters of the interpolation, and hence ...

   Meeting Document : WG-EMM-05/42 : Auteur(s): B.G. Heywood, S.F. Gull and A.S. Brierley (United Kingdom)

2. Comparison of two methods to assess fish losses due to depredation by killer whales and sperm whales on demersal longlines

   Paper Title:  Comparison of two methods to assess fish losses due to depredation by killer whales ... interaction over access to resources, which often includes a combination of socio-economic, ecological and ... conservation issues. However, estimating the amount of resource depredated can be especially challenging when ... aimed at providing two indirect methods of assessment of depredated biomass over an 11-year period (2003 ... , such as estimating the amount of biomass loss caused by predators. While these losses can be directly ... loss. This study therefore aims to: (i) update the pre- vious estimation of the level of depredation ... tested by analysing the influence of the CPUE in the absence of odontocetes on the CPUE loss caused by ... absence and the presence of odontocete depredation and estimated a mean CPUE loss per cell (c). CPUE ...

   Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 1–14 : Auteur(s): Gasco, N., P. Tixier, G. Duhamel and C. Guinet

3. Joinville–D’Urville Islands (Subarea 48.1) – a former fishing ground for the spiny icefish (Chaenodraco wilsoni), at the tip of the Antarctic Peninsula – revisited

   icefish (Chaenodraco wilsoni), at the tip of the Antarctic Peninsula – revisited Abstract / Description ... :  The former fishing ground off Joinville–D’Urville Islands was revisited in the course of the Antarctic ... Expedition ANT XIX/3 by RV Polarstern in February 2002. Five hauls were conducted north of the two islands at ... depths of 149 to 282 m on 21 February 2002. Published and unpublished reports from fishing operations in ... (Pleuragramma antarcticum). When fi sh reached 4 years of age they moved to the east again. They fi rst ... adult females caught (n = 10) suggested that C. rastrospinosus was in the middle of the spawning ... the middle of its spawning season when taken in the second half of February. Sosinski et al. (1981 ... GROUND FOR THE SPINY ICEFISH (CHAENODRACO WILSONI), AT THE TIP OF THE ANTARCTIC PENINSULA – REVISITED ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 1–20 : Auteur(s): Kock, K.-H., L. Pshenichnov, C.D. Jones, K. Shust, K.E. Skora and Zh.A. Frolkina

4. Fishery Report 2017: Dissostichus eleginoides Prince Edward Islands South African EEZ (Subarea 58.7 and part of Area 51)

   African EEZ (Subarea 58.7 and part of Area 51) ... present season. 6. Fishing effort in the South African EEZ is concentrated to the north and the east of ... compensate for the expected loss of revenue associated with setting Spanish longline gear, vessels were ... cetaceans, can contribute up to 50% of loss in catch landings, there have been no reports of incidental ... : Dissostichus eleginoides Prince Edward Islands South African EEZ (Subarea 58.7 and part of Area 51 ...

   Document : Site Section: Publications

5. Fishery Report 2018: Dissostichus eleginoides Prince Edward Islands South African EEZ (Subarea 58.7 and part of Area 51)

   African EEZ (Subarea 58.7 and part of Area 51) ... present season. 6. Fishing effort in the South African EEZ is concentrated to the north and the east of ... the expected loss of revenue associated with setting Spanish longline gear, vessels were eligible to ... cetaceans, can contribute up to 50% of loss in catch landings, there have been no reports of incidental ... : Dissostichus eleginoides Prince Edward Islands South African EEZ (Subarea 58.7 and part of Area 51 ...

   Document : Site Section: Publications

6. Descriptive analysis of mesopelagic backscatter from acoustic data collected in the Ross Sea

   Abstract:  This report presents results from a pilot study to investigate the use of acoustics to ... quantify spatial and vertical distribution of acoustic backscatter in the upper 1000 m of the water column ... . There were clear spatial patterns in the amount and type of mesopelagic backscatter observed. There was ... much more backscatter in the upper 1000 m and a wider variety of mark types north of 67° S. Common mark ...

   Meeting Document : WG-EMM-06/11 : Auteur(s): R.L. O’Driscoll (New Zealand)

7. Estimation of natural mortality using catch-at-age and aged mark-recapture data: a multi-cohort simulation study comparing estimation for a model based on the Baranov equations versus a new mortality equation.

   Paper Title:  Estimation of natural mortality using catch-at-age and aged mark-recapture data: a ... , using multiple cohorts and multiple years of catch-at-age and aged mark-recapture data was tested using ... simulation. Alternative fishing selectivity functions of age of dome-shaped versus sigmoidally shaped were ... number of recaptures-at-age and model the population numbersat- age by annual difference equations ... Science, Vol. 18 (2011): 1–27 Estimation of natural mortality using CatCh-at-agE and agEd mark ... Equations vErsus a nEw mortality Equation S.G. Candy Australian Antarctic Division Department of ... multiple cohorts and multiple years of catch-at-age and aged mark-recapture data was tested using ... simulation. Alternative fishing selectivity functions of age of dome-shaped versus sigmoidally shaped were ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 1–27 : Auteur(s): Candy, S.G.

8. Status of krill target strength

   Paper Title:  Status of krill target strength Abstract / Description:  Empirical estimates for the ... target strength of krill are extracted from publications. These are confined to measurements on ... aggregations of live euphausiids and should not be affected by a frequent cause of bias in single-animal ... -cylinder scattering model assuming specific sets of physical and orientational parameters, for which there ... WG-KRll.L-92/11 STATUS OF KRILLTARGET STRENGTH K.G ... . Foote1, D. Chu2 and T.K. Stanton2 Abstract Empirical estimates for the target strength of krill are ... extracted from publications. These are confined to measurements on aggregations of live euphausiids and ... should not be affected by a frequent cause of bias in single-animal measurements, namely thresholding ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 101–126 : Auteur(s): Foote, K.G., D. Chu and T.K. Stanton

9. Options for allocating the precautionary catch limit of krill among small-scale management units in the Scotia Sea

   Paper Title:  Options for allocating the precautionary catch limit of krill among small-scale ... management units in the Scotia Sea Abstract / Description:  Following an assessment of Antarctic krill ... (Euphausia superba) in the Scotia Sea, CCAMLR established a precautionary catch limit of 4 million tonnes and ... catch limit for krill among the SSMUs so as to preclude the inadvertent concentration of catches in a ... season availability of krill (e.g. arrival weights, egg mass, natality rate, foraging trip duration ... and 4% to the South Georgia East (SGE) SSMU following the distribution of colonies reported by ... OPTIONS FOR ALLOCATING THE PRECAUTIONARY CATCH LIMIT OF KRILL AMONG SMALL-SCALE MANAGEMENT UNITS IN THE ... of Antarctic krill (Euphausia superba) in the Scotia Sea, CCAMLR established a precautionary catch ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 81–97 : Auteur(s): Hewitt, R.P., G. Watters, P.N. Trathan, J.P. Croxall, M.E. Goebel, D. Ramm, K. Reid, W.Z. Trivelpiece and J.L. Watkins

10. Draft: differences in the foraging strategies of male and female Adelie penguins

    Abstract:  Consistent gender differences in foraging trip durations, feeding localities and diet ... of breeding Adelie penguins were demonstrated at two widely separated locations over a number of ... frequently and consumed larger quantities of krill, especially when chicks were small. Males tended instead ... on fish throughout chick rearing. The importance of these results to monitoring programs such as the ...

    Meeting Document : WG-EMM-95/46 : Auteur(s): Franchi, E., Kerry, K., Clarke, J.

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