Resultados de la búsqueda
-
AN ECOSYSTEM-BASED MANAGEMENT PROCEDURE FOR KRILL FISHERIES: A METHOD FOR DETERMINING SPATIALLY-STRUCTURED CATCH LIMITS TO MANAGE RISK OF SIGNIFICANT LOCALISED FISHERIES IMPACTS ON PREDATORS.
. This framework formalises the decisions that need to be made in dealing with an ensemble of food web ... conditions to be achieved and the uncertainties that need to be managed and does not assume an understanding ... of predator-prey dynamics beyond that evident in the data. It is a natural extension of the current ... advice can be updated as improvements are made in any component of the procedure, including the provision ...
Meeting Document : WG-SAM-08/16 : Autor(es): A. Constable and S. Candy (Australia)
-
An ecosystem-based management procedure for krill fisheries: a method for determining spatially-structured catch limits to manage risk of significant localised fisheries impacts on predators
. This framework formalises the decisions that need to be made in dealing with an ensemble of food web ... conditions to be achieved and the uncertainties that need to be managed and does not assume an understanding ... of predator-prey dynamics beyond that evident in the data. It is a natural extension of the current ... advice can be updated as improvements are made in any component of the procedure, including the provision ...
Meeting Document : WG-EMM-15/36 : Autor(es): A. Constable and S. Candy (Australia)
-
Size at sexual maturity of Patagonian toothfish (Dissostichus eleginoides)
that L m50 occurs at 78.5 cm total length for male and 98.2 cm for female fish. In 1997 the results for ... male fish were essentially the same. For female fish there is evidence that in 1997 a significant ... allowing for this bias indicates that L m50 for female fish in 1997 was no different to that for 1996. The ... was that, due to the closure of the fishery, there were no data for August 1996; this category ... condition at that time was 96%, the effect would be negligible at the population level. Analysis of the ... PROBITANALYSIS procedure, but it can be seen from Table 3 that the confidence limits for the estimated values ... is declining in successive months. We offer no explanation for this but note that it may be a ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 37–46 : Autor(es): Everson, I. and A.W. Murray
-
Population assessment of Patagonian toothfish in Subarea 48.4 – 2011 update
suggest that further data on the D. eleginoides population at Saunders island should be acquired, with ... . eleginoides in 48.4 South. We also propose that directed fishing on D. mawsoni should not be permitted in 2011 ... , as an alternative to the catch at length data that were the only such data available in 2010. The ... second part of the experiment (2009 – 2011) show that although CPUE of D. eleginoides is very low there ...
Meeting Document : WG-FSA-11/38 : Autor(es): J. Roberts, R. Mitchell and R. Wakeford (United Kingdom)
-
Precautionary measures for a new fishery on Martialia hyadesi (Cephalopoda, Ommastrephidae) in the Scotia Sea: an ecological approach
vary. In common with other ommastrephids, the species is probably semelparous. It is proposed that the ... consumption data because comprehensive sampling can be carried out during their breeding seasons. A ... 000 tonnes, with an upper estimate of 550 000 tonnes if less reliable data are included. M. hyadesi ... spawns between autumn and mid-summer with peak hatching in winter/spring. Its life span has not been ... Convention Area suggest that M. hyadesi may live for two years, but this may vary. In coinmon with other ... fishing season to avoid direct competition with what is perceived to be the most sensitive predator ... 96 9 6 9 6 It is a safe assumption that M. hyadesi, in common with all the better-known ... indication of its production level. The problem is to estimate the proportion of this that could be ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 125–139 : Autor(es): Rodhouse, P.G
-
Krill fishery report: 2007 update
the season is approximately 111746 t. This compares with 106589 t of krill reported in the STATLANT ... for krill in Area 48 in the 2006/07 season, and these vessels have taken 61876 t of krill to date. Two ... data for 2005/06. With the exception of Korea and Poland, all Contracting Parties have submitted ...
Meeting Document : WG-EMM-07/05 : Autor(es): Secretariat
-
A proposed management procedure for the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity
, whereas catch-at-length information indicates that past catches have had relatively little impact on ... catches made. An MP with control parameter values specified is proposed for implementation based on the ... -recruitment curve steepness h is low. These tests also indicate that monitoring of future catch-at-length ... information would be necessary to guard against a change in selectivity towards greater catches of older fish ... toothfish resource is that, while the two ‘alternative hypotheses’ above can- not at present be reliably ... best ensures that the resource is hardly likely be further depleted (and indeed preferably shows some ... data (both catch-at-length distributions and CPUEs) to be generated which are compatible with past ... compatibility with all past data is impossible, given the highly conflicting assessment results that fol- low ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 33–69 : Autor(es): Brandão, A. and D.S. Butterworth
-
Developing high-resolution hydrodynamic models of the shelf regions around South Georgia and the South Orkney Islands
hydrodynamic models that will be used to examine the detailed oceanography of the South Georgia and South ... Orkney Islands shelves and surrounding regions. The models will be based on the NEMO-Shelf model, with ... Abstract: Many of the key oceanographic and ecological processes that determine the structure and ... the capability to resolve tides, atmospheric forcing, and sea ice processes, and with a ~3 km ...
Meeting Document : WG-EMM-14/08 : Autor(es): E.J. Murphy, E.F. Young, S.E. Thorpe, P.N. Trathan (United Kingdom) and O.R. Godø (Norway)
-
Annual report of global toothfish trade data
importer, with 32.30% of global imports. Chile was estimated to be the largest exporter, with 15.26% of ... between global trade data and the CDS found that they are similar with a-2.29% difference in imports and ... sources for the trade of toothfish products for the 2017 calendar year. The analysis has identified that ... in 2017 toothfish was most commonly traded as an unprocessed frozen product which could be in various ...
Meeting Document : CCAMLR-XXXVII/BG/08 Rev. 1 : Autor(es): CCAMLR Secretariat
-
Report on a tuna long-lining fishing voyage aboard Southern Venture to observe seabird by-catch problems
as it was deployed, were observed during 8-days039; fishing of a New Zealand-owned tuna long-liner ... under thick cloud. Most bait-takes occurred in daylight, particularly before dusk. The vessel039;s ... (0.2711000 hooks set) is similar to that in the only other two reported studies. Seabirds scavenged ...
Meeting Document : WG-IMALF-94/10 : Autor(es): M.J. Imber (New Zealand)