Résultats de la recherche
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Target strength studies on Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea
), some sizes of P. antarcticum could be confused acoustically with E. crystallorophias, but not with E ... -larvae of P. antarcticum with a total length from 13 to 70 mm, were conducted in the southeast of the ... indicate that the TS–TL relationships at 38, 120 and 200 kHz of adults of P. antarcticum differ ... both ex situ and in situ with a mean difference <1.5 dB, although the differences between the ... . With an appropriate sampling regime it can be expected that, on average, the inac- curacies of the ... swimbladder have not been conducted over as large a range of species and sizes as that of fish with ... . It is unlikely that those results could be adequate to give even a rough indication of the target ... influenced by the swimming angle. However, this effect could be less than expected for fish with scattering ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 75–104 : Auteur(s): Azzali, M., I. Leonori, I. Biagiotti, A. De Felice, M. Angiolillo, M. Bottaro and M. Vacchi
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A risk-management framework for avoiding significant adverse impacts of bottom fishing gear on Vulnerable Marine Ecosystems
should be reviewed annually to ensure that all relevant or new information has been included, appropriate ... measure in 2007 to ensure that significant adverse impacts of bottom fishing gear on Vulnerable Marine ... presence and the consequences of interaction with different types of gear, a risk-management framework is ... proposed, similar to that which has been used successfully to minimise the effects of longline fishing ... consequences of interactions of gear with VMEs can be revised. Bottom fishing gear that has been used histori ... operate, as with current by-catch measures. Note that these will only be applicable when there is a ... with different types of gear, a risk-management framework is proposed, similar to that which has been ... should be reviewed annually to ensure that all relevant or new information has been included ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 177–193 : Auteur(s): Martin-Smith, K
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Information on the status of fjord Notothenia rossii, Gobionotothen gibberifrons and Notothenia coriiceps in the lower South Shetland Islands, derived from the 2000–2006 monitoring program at Potter Cove
was absent in the catches. These trends are consistent with those observed in scientific cruises ... means by each year are presented in Figure 1. It should be noted that these estimates have been ... , D. Ramm, J. Ashford, S. Wilhelms, T. Near, N. Gong and H. Flores. 2001. Results and standing stock ... of 24 years which began in 1983, and at Harmony Cove in the summers of 2001 to 2003. The decline in ... absent in the catches. These trends are consistent with those observed in scientifi c cruises studying ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 83–87 : Auteur(s): Barrera-Oro, E.R. and E.R. Marschoff
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Continuation in the 2014/15 season of the research plan initiated in 2012/13 for stocks of Dissostichus spp. in Divisions 58.4.1 and 58.4.2
vessel's operations, fulfilling Spain's commitment to return to the same fishing areas in order ... with the age-growth study by otoliths reading will allow a robust stock assessment by the end of this ...
Meeting Document : WG-SAM-14/09 : Auteur(s): Delegation of Spain
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Investigating emigration in stock assessment models of Antarctic toothfish (Dissostichus mawsoni) in Subarea 88.2 SSRUs 88.2C–H
work. This was presented to WG-SAM in 2014, and found that the models were unable to fit patterns in ... of a cohort of tagged fish with few being recaptured after more than 3 years at liberty, a steepening ... recapture data we carried out a series of simple simulations in R. This suggested that the observed pattern ... for that tagging data in SSRU 88.2H was only reproduced in scenarios that included both immigration ...
Meeting Document : WG-FSA-14/56 : Auteur(s): S. Mormede, A. Dunn and S.M. Hanchet (New Zealand)
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Coopération avec d'autres organisations : Accords avec des organisations internationales
restricted to exchange of reports and invitation to meetings. The Secretariat proposes that this be extended ... for those organisations that also catch toothfish to include cooperation with CCAMLR’s toothfish ... be undertaken under the Arrangements with SPRFMO, the South East Atlantic Fisheries Organisation ... Abstract: CCAMLR has Arrangements with five other organisations. Two Arrangements (Commission for ...
Meeting Document : CCAMLR-XXXVII/10 : Auteur(s): CCAMLR Secretariat
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A feedback management strategy for the krill fishery in Subarea 48.1
consistent with the agreed definition of a Stage-2 strategy, and we advocate that it be trialed in real life ... penguin recruitment is expected to be so poor that the population will decline even if adult survival ... recruitment is expected to be so poor that the population will decline even if almost all adults survive ... fishery in Subarea 48.1. This strategy is a combination of two strategies that were separately proposed ...
Meeting Document : WG-EMM-16/48 : Auteur(s): G.M. Watters, J.T. Hinke and C.S. Reiss
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Geographical differences in the condition, reproductive development, sex ratio and length distribution of Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea, Antarctica (CCAMLR Subarea 88.1)
. Dissostichus mawsoni samples from the northern part of the Ross Sea showed that this component of the ... with the southern group (in which the distribution was multimodal), showed a consistent and ... . It was noted over the 2001/02 and 2002/03 seasons, that with the arrival of polar darkness for ... detail can currently be extracted from this information with any statistical confidence. However ... given fishing season. In this context, the argument would be that some proportion of the accessible ... is not consist- ent with this hypothesis. Alternatively there could be an interchange of fish ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 27–45 : Auteur(s): Fenaughty, J.M
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Antarctic krill and climate change
particular, it was concluded that current precautionary management measures need to be maintained, until ... Abstract: During April 2011, a multi-national group of scientists with expertise on Antarctic ... ocean warming, sea ice loss, and ocean acidification. It was concluded that the cumulative impact of ... climate change on krill is probably negative. To be able to account for climate change-induced ...
Meeting Document : SC-CAMLR-XXX/BG/03 : Auteur(s): Delegation of the European Union
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Variability and predictability of Antarctic krill swarm structure
) echosounder, concurrent with net sampling. The acoustic data were analysed through applying a swarm ... , containing swarms that were isolated (>100 km away from the next swarm). The distribution of swarm types ... over the survey grid was examined with respect to a number of potential explanatory variables ... immature krill. We propose that, at the mesoscale level, the structure of swarms switches from being ...
Meeting Document : WG-EMM-10/P10 : Auteur(s): G.A.Tarling, T. Klevjer, S. Fielding, J. Watkins, A. Atkinson, E. Murphy, R. Korb, M. Whitehouse and R. Leaper