Resultados de la búsqueda
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Collection, processing and potential use of sonar data from krill fishing vessels
Antarctic krill distribution, and potentially abundance. Data from sonars can be used independently of ... acoustic surveys. Sonars are capable of sampling large volumes of water and can image entire krill swarms ... and track changes in swarms through time. Some commercial krill fishing vessels, e.g. ‘Juvel’ and ... vessels. The purpose of this paper is to stimulate discussion on the utility of sonars to describe krill ...
Meeting Document : SG-ASAM-14/01 : Autor(es): G. Skaret (Norway) and M.J. Cox (Australia)
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Discussion on recent results from an integrated assessment of Antarctic krill (Euphausia superba) in Subarea 48.1
-assessment framework for Antarctic krill (Euphausia superba) to assimilate multiple sources of survey data ... and estimate krill growth. Kinzey et al. (2014) fitted stock-assessment models to survey data that ... from three of the models provide a robust picture of changes in the krill population. An annual model ... -annual variations in cohort strength have dominated krill dynamics in Subarea 48.1. Long-term trends ...
Meeting Document : WG-EMM-14/35 : Autor(es): G.M. Watters, C.S. Reiss and D. Kinzey (USA)
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Classification of Southern Ocean krill and icefish echoes using Random Forests
. Antarctic krill, Euphausia superba, are typically identified through a combination of expert scrutiny of ... two or more echosounder frequencies. For commonly used frequencies, however, the differences for krill ... pelagic aggregations, which can be difficult to distinguish acoustically from large krill layers. Mackerel ... during surveys. The final random forest classified krill, icefish, and mixed aggregations of weak ...
Meeting Document : WG-EMM-16/23 : Autor(es): N. Fallon, S. Fielding and P. Fernandes
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Demography of Antarctic krill in the Elephant Island area (Antarctic Peninsula) during austral summer 2001
Abstract: A net sampling survey was carried out for krill in an established standard station grid ... small size classes, one year old juvenile krill was found. Krill density was significantly higher than ... during the past years (between 198 and 230 krill 1000 m-3, i.e. between 40 and 46 m-2 or 11.3 g m-2). The ... high krill abundance and the high recruitment index reflect the end of a succession of years with poor ...
Meeting Document : WG-EMM-01/10 : Autor(es): V. Siegel (Germany), B. Bergström (Sweden), U. Mühlenhardt-Siegel (Germany) and M. Thomasson (Sweden)
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Distribution and size of Antarctic krill (Euphausia superba Dana) in the Polish commercial catches in the Atlantic sector of Antarctica in 1997–1999
Abstract: The distribution, density and length composition of krill in commercial concentrations ... krill concentration. The internal structure of the concentration was very diverse and the mean density ... varied from 11 to 31,370 specimens * m-3. At night, the krill concentrations were scattered throughout ... found in deeper waters. The size structure of the krill was diverse during all periods and in all areas ...
Meeting Document : WG-EMM-01/13 : Autor(es): E. Jackowski (Poland)
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South Orkney Island 2016 Antarctic krill and ecosystem monitoring
, krill demography and other macro zooplankton from trawl station work, krill predator sightings data as ... well as krill-experimental work carried out on onboard. Author(s): B.A. Krafft, G. Skaret, L.A. Krag ... , T. Rustand and R. Pedersen Title: South Orkney Island 2016 Antarctic krill and ecosystem monitoring ...
Meeting Document : WG-EMM-16/P03 : Autor(es): B.A. Krafft, G. Skaret, L.A. Krag, T. Rustand and R. Pedersen
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Growth and shrinkage in Antarctic krill Euphausia superba is sex-dependent
Abstract: The ability of Antarctic krill Euphausia superba Dana to withstand the overwintering ... period is critical to their success. Laboratory evidence suggests that krill may shrink in body length ... during this time in response to the low availability of food. Nevertheless, verification that krill can ... sources of winter krill population data is from commercial vessels. We examined length-frequency data of ...
Meeting Document : WG-EMM-16/P04 : Autor(es): G. Tarling, S. Hill, H. Peat, S. Fielding, C. Reiss and A. Atkinson
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RESEARCH PLAN AND RESULTS OF PRELIMINARY OBSERVATION ABOUT THE POSSIBILITY OF ANTARCTIC KRILL ESCAPEMENT FROM A TRAWL NET
Abstract: We made a survey plan to observe krill escapement, attached an underwater video camera ... krill passage through the rope and netting parts of the trawl net. Preliminary examination of video ... images obtained via satellite-linked transmission indicated very low incidence of krill escapement from ... AND RESULTS OF PRELIMINARY OBSERVATION ABOUT THE POSSIBILITY OF ANTARCTIC KRILL ESCAPEMENT FROM A ...
Meeting Document : WG-EMM-11/36 : Autor(es): K. Fujita and S. Hasegawa (Japan)
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Developing conceptual models of elements of the Antarctic marine ecosystem: Antarctic krill (Euphausia superba)
Abstract: A simple generalised conceptual life history model for Antarctic krill is developed ... relationships between Antarctic krill and its biotic and abiotic environment. Krill life history is thus viewed ... ecosystem: Antarctic krill (Euphausia superba) Approval: Approved ...
Meeting Document : WG-EMM-04/50 : Autor(es): S. Nicol and S. Kawaguchi (Australia)
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Adélie penguin foraging behaviour and breeding success in seasons of contrasting krill availability (Mawson Coast, Antarctica)
penguins at the Béchervaise Island CEMP site were compared between seasons of contrasting krill ... availability. Krill biomass estimates were derived from shipboard surveys carried out within the penguins ... ’ normal foraging range during the 2001 and 2003 breeding seasons. More than three times as much krill was ... of the krill survey. Chick mortality peaked during this period also. The findings illustrate the ...
Meeting Document : WG-EMM-03/44 : Autor(es): J. Clarke, M. Tierney, S. Candy, S. Nicol, L. Irvine and K. Kerry (Australia)