Resultados de la búsqueda

1. Krill (Euphausia superba) distribution contracts southward during rapid regional warming

   be sensitive to warming and ice loss, but data are scarce and evidence is conflicting. Here, we show ... that, within their main population centre in the southwest Atlantic sector, the distribution of ... juveniles following positive anomalies of the Southern Annular Mode. Such anomalies are associated with warm ... recruits, suggesting that survival rates of older krill have increased. The changing distribution is ...

   Meeting Document : WG-EMM-2019/P02 : Autor(es): A. Atkinson, S.L. Hill, E.A. Pakhomov, V. Siegel, C.S. Reiss, V.J. Loeb, D.K. Steinberg, K. Schmidt, G.A. Tarling, L. Gerrish and S.F. Sailley

2. Validating the Gasco-method for depredation estimation in Subarea 48.3

   fisheries have a data collection programme that is sufficiently long established, or detailed, to allow for ... model estimation of the lost catch. A new method was developed in 2014 that used an observed change in ... spatial patterns. Author(s):  M. Söffker and T. Earl Title:  Validating the Gasco-method for depredation ...

   Meeting Document : WG-SAM-16/32 : Autor(es): M. Söffker and T. Earl

3. Effects of sea-ice extent and krill or salp dominance on the Antarctic food web

   trophic levels in the Antarctic marine food web. The pelagic tunicate Salpa thompsoni can also be ... reproduction and survival of krill larvae. Here we provide data from 1995 and 1996 that support hypothesized ... chlorophyll-a that indicate that there is a degree of competition between krill and salps. Our analysis of the ... decreased frequency of winters with extensive sea-ice development over the last five decades. Our data ...

   Meeting Document : WG-EMM-97/73 : Autor(es): Hewitt, R., Trivelpiece, S., Fraser, W., Holm-Hansen, O., Siegel, V., Trivelpiece, W., Loeb, V.

4. CCAMLR protocol for krill biomass estimation

   will present at the ASAM meeting for endorsement. We envisage that this effort will then be summarised ... in a paper submitted to WG-EMM 2016 so that a single published document will exist with the most up ... ; Conti and Demer, 2005) that led to the re-analysis of the CCAMLR-2000 survey at a workshop held in ... existing documentation of the protocol (from previous CCAMLR meetings) and matlab/R analysis code that we ...

   Meeting Document : SG-ASAM-16/02 : Autor(es): S. Fielding, A. Cossio, M. Cox, C. Reiss and G. Skaret

5. A Petersen tag-recapture preliminary population assessment of Antarctic toothfish in CCAMLR Subarea 48.4 based on data for the 2009–2014 fishing seasons

   tagging returns to be 1,027 tonnes during the  2013/14 season. In previous years the harvest rate used for ... (s):  V. Laptikhovsky, R. Scott, M. Söffker, T. Earl and C. Darby (United Kingdom) Title:  A Petersen ...

   Meeting Document : WG-FSA-14/30 Rev. 1 : Autor(es): V. Laptikhovsky, R. Scott, M. Söffker, T. Earl and C. Darby (United Kingdom)

6. Preliminary tag-recapture based population assessment of Antarctic toothfish in Subarea 48.4

   estimated from tagging returns to be 1068.7 tonnes. In previous years the harvest rate used for Patagonian ... . Wright, N. Walker, M. Söffker and T. Earl Title:  Preliminary tag-recapture based population assessment ...

   Meeting Document : WG-FSA-16/39 : Autor(es): S. Wright, N. Walker, M. Söffker and T. Earl

7. Preliminary assessment models of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea including data from the 2005/06 season

   modifying the estimates from the models, suggesting that the new data had a similar pattern to that of ... numbers scanned, but smaller increase in the reported numbers recaptured. It is likely that this ... than the 2006 reference case, with the use of the lower M (0.13 y-1 rather than 0.15 y-1) resulting in ... slightly lower productivity, the yield estimate from the revised parameters model are likely to be slightly ...

   Meeting Document : WG-FSA-SAM-06/11 : Autor(es): Dunn, A. & Hanchet, S.M.

8. A spatial multi-species operating model (SMOM) of krill–predator interactions in small-scale management units in the Scotia Sea

   model currently includes only two predator groups (penguins and seals) but is configured so that there ... is essentially no upper limit on the number of predator species which can be included. Given the ... combinations that essentially try to bound the uncertainty in the choice of survival estimates as well as the ... of stochastic replicates to explore different hypotheses such as that related to the transport of ...

   Meeting Document : WG-EMM-06/12 : Autor(es): É. Plagányi and D. Butterworth (South Africa)

9. LENGTH AND AGE AT SPAWNING OF ANTARCTIC TOOTHFISH DISSOSTICHUS MAWSONI IN THE ROSS SEA

   that primary endogenous growth can occur for an extended period with oocytes accumulating at the ... fishing seasons. The female spawning ogive incorporates the proportion of sexually mature fish that do not ... slope region is estimated to be 16.6 yr (range 16.0–17.3) or 133.2 cm (range 130.9–135.7) by length ... slope with the age distribution in the northern area and the lack of evidence for skip spawning in the ...

   Meeting Document : WG-FSA-09/37 : Autor(es): S.J. Parker and P.J. Grimes (New Zealand)

10. A characterisation of the toothfish fishery in Subareas 88.1 and 88.2 from 1997–98 to 2014–15

    changes in CPUE that were not consistent with biologically driven changes in abundance and are considered ... Abstract:  This report summarises the timing, depth, and location of fishing effort together with ... not to be indexing abundance. Length frequency distributions of Antarctic toothfish in the Ross Sea ... similar to that in the early period of the fishery – the reason for this is unclear. There has been a ...

    Meeting Document : WG-FSA-15/36 : Autor(es): K. Large, S.M. Hanchet and S. Mormede (New Zealand)

Páginas