Résultats de la recherche

1. Direct ageing of Antarctic krill (Euphausia superba) – potential utility of eyestalk sections for age determination

   Abstract:  We outline a method for the direct determination of age in Antarctic krill (Euphausia ... endocuticle layer of the eyestalks and gastric mill in decapod crustaceans. Here we report on a preliminary ... superba). Recent studies (Kilada et al. 2012), have shown that annular growth bands are present in the ... proof of concept study using several known age krill grown under controlled conditions at the Australian ...

   Meeting Document : WG-EMM-15/45 : Auteur(s): C. Reiss (USA), R. Kilada (Canada) and S. Kawaguchi (Australia)

2. MaxEnt reconstructions of krill distribution and estimates of krill density from acoustic surveys at South Georgia 1996–2000

   approximately 0.5 km intervals along transect for each of the ten 80 km transects in each box, providing about ... probable krill density for each of the 32000 0.5 km x 0.5 km cells in each survey box, taking explicit ... account of the spatial relationship between densities in the observed data. Despite some very large ... of mean krill density within two survey boxes of dimensions 80 km x 100 km to the north east and ...

   Meeting Document : WG-EMM-02/36 : Auteur(s): M.H. Wafy, A.S. Brierley, S.F. Gull and J.L. Watkins (United Kingdom)

3. Extinction risk of Antarctic and sub-Antarctic colonies of Pygoscelid penguins under climate change context

   different colonies around Antarctica. In this study, the extinction risk of Adélie, Chinstrap and Gentoo ... Abstract:  Several studies have emphasized the variable abundance of Pygoscelid penguins from ... penguins was evaluated in order to identify the most endangered colonies under present-day and future ... structure and the response of population dynamics of each colony to exogenous perturbations. The ...

   Meeting Document : WG-EMM-2019/74 : Auteur(s): M. Huerta and S.A. Estay

4. Peak mortality of krill, fished with midwater trawls and feasible criteria of krill trawls ecological safety

   elimination probability caused by cath and mortality in fishery operations. The coefficient of trawl ... Abstract:  The mathematical model of a fishery object contact against a mesh, while escaping ... ecological safety is offered, which is the ratio of the amount of the objects caught and objects caught and ... died during fishery. The equations are presented to estimate the gross removal of an object by the ...

   Meeting Document : WG-KRILL-93/34 : Auteur(s): Yu. V. Kadilnikov (Russia)

5. A review of methodologies aimed at avoiding and/or mitigating incidental catch of protected seabirds.

   published reviews in the field of bycatch mitigation have typically had a species or fishing method focus ... management of offal and discards are recommended as the most effect measure to reducing seabird bycatch in ... fisheries interactions have been released in a variety of local, national and international media. Recent ... . This report presents the results of the seabird component of a global review of mitigation methods ...

   Meeting Document : WG-FSA-05/P8 : Auteur(s): Bull, L.

6. Models of larvae dispersion of Antarctic toothfish (Dissostichus mawsoni)

   stock structure in the Ross Sea have parallels for populations in other regions of the Antarctic, and ... locations in the northern areas of Subarea 88.1 & 88.2 to further investigate the possible larval ... hypotheses about how stock structure is maintained may apply to each population. We provide an update of the ... circumpolar models of larval dispersion for D. mawsoni developed by Hanchet et al. (2008) using the HiGEM ...

   Meeting Document : WG-FSA-12/48 : Auteur(s): A. Dunn, G.J. Rickard, S.M. Hanchet and S.J. Parker (New Zealand)

7. Using tag-recapture data to estimate catchability of a series of random stratified trawl surveys

   Heard Island and McDonald Islands (HIMI) in Division 58.5.2, a prior for catchability q of the random ... address potential bias in the estimation of q and conclude that the potential bias that may arise from ... fishing selectivity cannot be corrected for given the available data.   In the absence of an unbiased ... used for abundance estimates from trawl surveys in a toothfish stock assessment. The bounds of such as ...

   Meeting Document : WG-SAM-15/34 : Auteur(s): W. de la Mare, P. Ziegler and D. Welsford (Australia)

8. Possible effects of different levels of fishing on krill on predators - some initial modelling attempts

   Meeting of the CCAMLR's WG-Kril1 and WG-CEMP in 1992 to address this issue. First. estimates are made ... . Computations based on this model indicate that variability in the annual recruitment of krill results in ... predator population dynamics information in the context of the models developed, and about the model1ing of ... of the parameters of predator survival rates as functions of krill abundance, by considering a krill ...

   Meeting Document : WG-KRILL-93/43 : Auteur(s): D.S. Butterworth and R.B. Thomson (South Africa)

9. Summary of holdings of Patagonian toothfish (Dissostichus eleginoides) otoliths and size-at-age estimates from Heard and McDonald Islands (Division 58.5.2)

   Abstract:  Scientific observers aboard vessels in the Australian fisheries in 58.5.2 have ... collected Dissostichus eleginoides otoliths since the fishery commenced in the 1996/97 season. This program ... has yielded data which has assisted with understanding age structure and growth rates of toothfish in ... currently used in the assessment to predict growth and assign length-at-age to catch-at age, however an ...

   Meeting Document : WG-FSA-07/45 : Auteur(s): D.C. Welsford and G.B. Nowara (Australia)

10. Application of continuous time Markov chains to modelling animal movement: estimation of movement rates and retention times for Patagonian toothfish

    Abstract:  The study of animal movement and distribution has been a central focus in ecology since ... apply the model to estimate the equilibrium distribution of Patagonian toothfish in the region around ... the inception of the science. However, continuous-time, discrete state models have received relatively ... Heard and MacDonald Islands in the Australian Antarctic zone using to mark-recapture data from the ...

    Meeting Document : WG-FSA-SAM-06/16 : Auteur(s): C. Wilcox, M. Bravington and D. Peel (Australia)

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