Search results
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Differences in distribution and population structure of krill (Euphausia superba) between penguin and fur seal foraging areas near Seal Island
while at shallower layer (20-50 m) at night. In the offshore foraging areas krill showed no diurnal ... . 2-3 km in horizontal distance) of higher densities (≥250g/m2). In the inshore foraging areas krill ... showed a diurnal vertical migration, tending to be at deeper depth range (50-100 m deep) in the day time ... vertical migration, staying close to the surface throughout the day. As for body size and maturity of krill ...
Meeting Document : WG-KRILL-92/27 : Author(s): T. Ichii, H. Ishii (Japan), J.L. Bengtson, P. Boveng, J.K. Jansen (USA) and M. Naganobu (Japan)
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Seabird avoidance measures for small Alaskan longline vessels
, the current requirement for small vessels using fixed gear of a single streamer line with no mandatory ... Abstract: Given the lack of information on appropriate seabird avoidance measures for small ... Alaskan longline vessels, we determined the “2-m access window”, or the distance astern that longline ... (> 26 to 55 feet) using two gear types: snap-on gear and fixed gear. We also determined the ...
Meeting Document : WG-FSA-05/36 : Author(s): E.F. Melvin and M. Wainstein (USA)
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INGESTION OF FISHING GEAR AND ENTANGLEMENTS OF SEABIRDS: IMPLICATIONS FOR MONITORING AND MANAGEMENT
of a 16 year dataset collected at Bird Island indicated that the amount of gear found in association ... -headed albatross was from squid and not longline fisheries, and mistaken for natural prey rather than the ... higher in giant petrels and wandering albatross than black-browed albatross, and no grey-headed albatross ... was affected. The index of wandering albatross gear abundance showed two peaks, the most recent ...
Meeting Document : WG-IMAF-09/10 : Author(s): R.A. Phillips, C. Ridley, N. Harrison (United Kindom), K. Reid (Secretariat), G.N. Tuck (Australia) and P.J.A. Pugh (United Kingdom)
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Tooth growth in male Antarctic fur seals (Arctocephalus gazella) from South Georgia: an indicator of long-term growth history
but significant increase through the period when samples were collected (l972/73–1988/89). There were ... ) and increased with age at death. Changes in the growth pattern of teeth suggested that fur seals which ... compared with the expected layer depth based on a linear relationship between layer depth and age at which ... each layer was deposited. There was significant variation in the depth of tooth growth layers deposited ...
Meeting Document : WG-CEMP-93/11 : Author(s): I.L. Boyd and J.P. Roberts (United Kingdom)
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Bias in the estimation of krill yield from using a deterministic formulation of the median unexploited spawning biomass
level of escapement. The generalised yield model uses an unbiased estimate of SB0 and, thus, requires no ... krill yields according to decision rules that relate spawning stock status to the median unexploited ... spawning biomass, SB0. The first model has been developed specifically for krill, the krill yield model ... , while the second is a generalised yield model. The decision rules relate to the effects of a specified ...
Meeting Document : WG-EMM-97/45 : Author(s): de la Mare, W.K., Constable, A.J.
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Beached marine debris surveys and incidences of seabird/marine mammal entanglements and hydrocarbon soiling at Bird Island and King Edward Point, South Georgia, and Signy Island, South Orkneys, 2009/10
previous years, and for the first time we also report data collected at King Edward Point, South Georgia ... (November 2009 to March 2010). Plastic and longline fishing line were the most commonly observed items (in ... varying quantities) at Bird Island, and the majority of items collected at Signy Island were either ... with seabird colonies at Bird Island, with the highest number (97 items; 65%) associated with wandering ...
Meeting Document : SC-CAMLR-XXIX/BG/10 : Author(s): Delegation of the United Kingdom
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The orderly development of the krill fishery
Abstract: During deliberations at CCAMLR XXV on revising the precautionary catch limit for krill ... in Statistical Division 58.4.2 Australia noted that while the scientific data supported an increase ... , such a large increase required the inclusion of other elements in the conservation measure to ... facilitate the orderly and precautionary development of the fishery. Australia has this year submitted papers ...
Meeting Document : CCAMLR-XXVI/30 : Author(s): Delegation of Australia
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Standing stock estimates of finfish biomass from the 2002 Polarstern bottom trawl survey around Elephant Island and the South Shetland Islands (Subarea 48.1) with some notes on the composition of catches taken north of Joinville Island – D’Urville Island
species in the region, decreased significantly since 1998. No indication was found for the presence of a ... and the South Shetland Islands in January – February 2002 in close collaboration with the U.S ... distribution of the abundant fish species was provided. Estimates of total biomass for Elephant Island and the ... results obtained in 1998 and 2001 for most species. Length compositions in the most abundant species ...
Meeting Document : WG-FSA-02/24 : Author(s): K.-H. Kock (Germany), C.D. Jones (USA), J. Appel (Germany), G. von Bertouch (CCAMLR Secretariat), D.F. Doolittle (USA), M. la Mesa (Italy), L. Psenichnov (Ukraine), R. Riehl (Germany), T. Romeo (Italy), S. Schöling (Germany) and L. Zane (Italy)
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Results from the random stratified trawl surveys to estimate distribution and abundance of Dissostichus eleginoides and Champsocephalus gunnari in the Heard Island region (Division 58.5.2) for 2010 and 2011
2011 on the RV Southern Champion, adding to the time series of annual surveys in Division 58.5.2 that ... the September 2010 survey were used in the stock assessment as they provided valuable additional ... the average catch for the previous four years (2006-2009). Catches of C. gunnari were very low, with ... the 2011 catch, at less than 0.5 t, 15% of the earlier four year average, and the 2010 catch being 60 ...
Meeting Document : WG-FSA-11/23 : Author(s): G.B. Nowara, S.G. Candy and T. Lamb (Australia)
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An assessment of the use of ocean gliders to undertake acoustic measurements of zooplankton: the distribution and density of Antarctic krill in the Weddell Sea
deployed in the Weddell Sea, Southern Ocean. The glider was deployed for two short periods in January 2012 ... , in separate survey boxes on the continental shelf to the east of the Antarctic Peninsula, to assess ... the distribution of Antarctic krill (Euphausia superba). During the glider missions, a research vessel ... using the stochastic distorted-wave Born approximation (SDWBA) target strength model. A sensitivity ...
Meeting Document : WG-EMM-14/P02 : Author(s): D. Guihen, S. Fielding, E. Murphy, K. Heywood and G. Griffiths