Search results
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Collection, processing and potential use of sonar data from krill fishing vessels
of Antarctic krill distribution, and potentially abundance. Data from sonars can be used independently ... 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 ‘Saga ... . The purpose of this paper is to stimulate discussion on the utility of sonars to describe krill within ...
Meeting Document : SG-ASAM-14/01 : Author(s): G. Skaret (Norway) and M.J. Cox (Australia)
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Preliminary model of krill fishery behaviour in Subarea 48.1
Abstract: A simple deterministic model is described which models the behaviour of the krill ... fishery in Subarea 48.1 and estimates the effort applied and the catch of krill in fine-scale squares ... : Preliminary model of krill fishery behaviour in Subarea 48.1 Approval: Approved ... A simple deterministic model is described which models the behaviour of the krill fishery ...
Meeting Document : WG-KRILL-93/14 : Author(s): D.J. Agnew (Secretariat)
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Krill (Euphausia superba) distribution contracts southward during rapid regional warming
superba (hereafter, ‘krill’) has contracted southward over the past 90 years. Near their northern limit ... the Antarctic shelves. A concomitant increase in mean body length reflects reduced recruitment of juvenile krill ... krill. However, the total post-larval density has declined less steeply than the density of recruits ... , suggesting that survival rates of older krill have increased. The changing distribution is already perturbing ...
Meeting Document : WG-EMM-2019/P02 : Author(s): A. Atkinson, S.L. Hill, E.A. Pakhomov, V. Siegel, C.S. Reiss, V.J. Loeb, D.K. Steinberg, K. Schmidt, G.A. Tarling, L. Gerrish and S.F. Sailley
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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 ... on a trawl net of a Japanese commercial trawler, and started observation to collect video images of krill ... obtained via satellite-linked transmission indicated very low incidence of krill escapement from top panels ... OF PRELIMINARY OBSERVATION ABOUT THE POSSIBILITY OF ANTARCTIC KRILL ESCAPEMENT FROM A TRAWL NET Approval ...
Meeting Document : WG-EMM-11/36 : Author(s): K. Fujita and S. Hasegawa (Japan)
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Acoustic data for the 1994 Krill Flux Workshop
will yield mean krill density along an arbitrary section through the survey area, giving results compatible ... with the specifications given in wg-krill-93 Appendix D. A program written to calculate such sections is also described ... an oceanographic dataset of current direction and speed. The two programs produce compatible vectors of krill ... for the 1994 Krill Flux Workshop Approval: Approved ...
Meeting Document : WS-Flux-94/04 : Author(s): Secretariat
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Results of acoustic assessment of krill biomass in Subarea 48.2 during summer 1996
; acoustic assessment of krill biomass and distribution was carried out in study area restricted with 59° 10 ... -tacks distance of 20 miles. The echosurvey was carried out diurnally. Krill target strength ... was estimated by means of TS/length relationship, recommended by WG-krill (SC-CAMLR, 1991). Recorded range ... mln. t at 95% confidence limit CL=93.1 thous.t. Variation coefficients of krill density and biomass ...
Meeting Document : WG-EMM-96/36 : Author(s): Sunkovich, V.I., Kasatkina, S.M., Abramov, V.M., Polischuk, M.I., Sushin, V.A., Shnar, V.N.
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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 were pooled ... of the models provide a robust picture of changes in the krill population. An annual model fitted to IKMT data ... in cohort strength have dominated krill dynamics in Subarea 48.1. Long-term trends (either decreasing ...
Meeting Document : WG-EMM-14/35 : Author(s): G.M. Watters, C.S. Reiss and D. Kinzey (USA)
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Habitat partitioning in Antarctic krill: spawning hotspots and nursery areas
Abstract: Antarctic krill, Euphausia superba, have a circumpolar distribution ... ontogenetic life stages of krill (eggs, nauplii plus metanauplii, calyptopes, furcilia, juveniles, and adults ... krill densities can be high. To address these questions, we compiled larval krill density records ... temperature suggest that krill associate with different habitats over the course of their life cycle. From ...
Meeting Document : WG-EMM-2019/20 : Author(s): F. Perry, A. Atkinson, S.F. Sailley, G.A. Tarling, S.L. Hill, C.H. Lucas and D.J. Mayor
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Diel vertical distribution of Antarctic krill around the South Shetland Islands in February 2019 and its potential effect on biomass estimation
Abstract: To address the potential effect of DVM behavior on krill biomass estimates, diel ... vertical distribution of krill swarms around the South Shetland Islands in Subarea 48.1 were analyzed based ... . Results show that more krill swarms were found in shallower depth at night than during daytime, while 16.5 ... underestimate the krill density due to the shallow distribution pattern of the animal, which may affect ...
Meeting Document : SG-ASAM-2019/05 : Author(s): X. Wang, X. Yu, J. Zhang and X. Zhao
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A hydroacoustic survey of Antarctic krill populations in CCAMLR Division 58.4.1
include hydroacoustic determinations of krill distribution and abundance and physical oceanographic ... . The data on krill distribution and abundance will be submitted to CCAMLR for the purpose of setting ... a precautionary catch limit on the krill fishery in Division 58.4.1. Author(s): Nicol, S. Title: A hydroacoustic ... survey of Antarctic krill populations in CCAMLR Division 58.4.1 Approval: Approved ...
Meeting Document : WG-EMM-95/43 : Author(s): Nicol, S.