Resultados de la búsqueda
-
Oceanography of the South Georgia and South Orkney Islands regions using high-resolution models
ecosystems operate over small spatial scales of <10 km. Understanding the drivers of variability in such ... . Many of the key oceanographic and ecological processes determining the operation of these marine ... processes requires the development of high-resolution ocean models. Here we describe the development of ... the results of preliminary analyses. The models are regional applications of NEMO with a ~3 km ...
Meeting Document : WG-EMM-17/30 : Autor(es): E. Young, E. Murphy and P. Trathan
-
High-resolution ocean modelling of the South Georgia and South Orkney Islands regions
South Orkney Islands is highly productive, with a history of commercial exploitation. Many of the key ... oceanographic and ecological processes that determine the structure and functioning of this ecosystem operate ... over small scales of <10 km. Historically, these fine spatial scales have been poorly represented in ... numerical models. Here we describe the development of two regional ocean models that will be used to examine ...
Meeting Document : WG-EMM-16/15 : Autor(es): E. Young, E. Murphy and P. Trathan
-
Preliminary assessment of the South Georgia ray populations
implemented in a Bayesian framework. Catch and CPUE data were reconstructed for the time series 1985 – 2006 ... from a variety of sources, and included the consideration that since 2004 the practice of cutting rays ... off lines at the water surface should have increased survivorship of discarded rays, although this ... deeper than 800m, and we have assumed that the majority of catches were of the Amblyraja variant species ...
Meeting Document : WG-SAM-07/11 : Autor(es): D.J. Agnew, R. Mitchell, T. Carruthers, J. Roberts, R. Hillary and J. Pearce (United Kingdom)
-
Using production models to assess the stock of Paralomis spinosissima around South Georgia Island
recruitment function. The best fitting model was Model 1. Model 1 had three parameters: an estimate of initial ... abundance (N0), an estimate of the scaling coefficient relating abundance to CPUE (q), and a recruitment ... removals should not be greater than the number of crabs that recruit to the fishery during the course of a ... information about the frequency and duration of the molting/mating event is required. To extrapolate the ...
Meeting Document : WG-FSA-93/23 : Autor(es): George Watters (USA)
-
GROUNDFISH SURVEY IN CCAMLR SUB-AREA 48.3 IN APRIL 2008 WITH PRELIMINARY ASSESSMENT OF MACKEREL ICEFISH
Abstract: In April 2008 the UK undertook a bottom trawl survey of CCAMLR Sub-Area 48.3 on the FV ... in the NW South Georgia area. A preliminary short-term projection of the mackerel icefish stock was ... the 1+ fish produced yield of 3445 tonnes in Year 1 (2008/09) and 2318 tonnes in Year 2 (2009/10). In ... sea-floor areas and adjusting this for the low headline height of the UK trawl (see CCAMLR WG-FSA ...
Meeting Document : WG-FSA-08/28 : Autor(es): M.A. Collins, R.E. Mitchell, C.E. Main, J. Lawson, J. Watts, J. Slakowski, L. Featherstone and O. Rzewuski (UK)
-
THE RISK TO FISHERY PERFORMANCE ASSOCIATED WITH SPATIALLY RESOLVED MANAGEMENT OF ANTARCTIC KRILL (EUPHAUSIA SUPERBA) HARVESTING
will affect fishery performance. One metric of potential performance is the probability of encountering ... exploitable densities of the target species at the scale of fishing operations. The probability of ... encountering exploitable densities of Antarctic krill, Euphausia superba, at the 1 nm scale during an acoustic ... spatial scale of management units could usefully predict effects at the scale of fishing operations ...
Meeting Document : WG-EMM-09/P10 : Autor(es): S. Hill, P. Trathan and D. Agnew
-
Preliminary aspects of a simulation model to be used for evaluating the experimental crab fishery
Abstract: At the 1993 meeting of the Working Group on Fish Stock Assessment, members requested ... that work be undertaken to evaluate certain aspects of the experimental management strategy for the ... rate data from the 1991/92 crab fishery are used to motivate the construction of an ontogenetic ... fishery simulation is spatially explicit, and the dynamics of crab abundance are described on a daily ...
Meeting Document : WG-FSA-94/26 : Autor(es): G. Watters (USA)
-
Is toothfish catch correlated with the catch of vulnerable benthic invertebrate taxa?
Abstract: Accurate estimation of the true impact of bottom fishing on vulnerable marine ... ecosystems (VMEs) requires knowledge of the distribution of those communities relative to the fishing ... study used the catch of the six most common vulnerable invertebrate taxa reported by observers on New ... benthic invertebrate catch rates at a longline segment level. Analysis of the data available showed no ...
Meeting Document : WG-EMM-10/27 : Autor(es): S.J. Parker and M.H. Smith (New Zealand)
-
United States seabird research undertaken as part of the CCAMLR Ecosystem Monitoring Program, 1987–1988
Abstract: As part of the NMFS/AMLR program to provide information for the effective management of ... Antarctica’s marine living resources, three permanent monitoring sites were established on the western side of ... on the breeding success, fledging weights, growth rates and diets of Chinstrap and Adelie Penguins ... were obtained. Although it is too early to draw conclusions on any aspects of the data, this report ...
Meeting Document : SC-CAMLR-VII/BG/17 : Autor(es): United States of America
-
Estimating the level of illegal fishing using simulated scaling methods on detected activity
, Annex 5, paragraph 3.18). The results of these simulations suggest that more information on IUU fleet ... the number of IUU fishing days, particularly for areas where patrolling may be relatively infrequent ... vessels between detecting IUU activity, thereby estimating the number of IUU fishing days, and deterring ... such activity. For assessment purposes, this highlights a general problem that the method of ...
Meeting Document : WG-FSA-SAM-04/14 : Autor(es): Ball, I.