"Navrhovan\u00FD projekt je zam\u011B\u0159en na p\u0159ekon\u00E1n\u00ED nejz\u00E1va\u017En\u011Bj\u0161\u00EDch limitac\u00ED pou\u017Eit\u00ED echolot\u016F pro ekologick\u00E9 pr\u016Fzkumy ve sladk\u00FDch vod\u00E1ch. Z\u00E1kladn\u00ED hypot\u00E9zy jsou n\u00E1sleduj\u00EDc\u00ED: 1/ zejm\u00E9na split-beam syst\u00E9my bude mo\u017Eno sledovat kvantitu, velikosti a chov\u00E1n\u00ED ryb, velk\u00FDch bezobratl\u00FDch a bublin v ka\u017Ed\u00E9 vod\u011B hlub\u0161\u00ED ne\u017E 1 m, 2/ integrac\u00ED objemov\u00E9 akustick\u00E9 odrazov\u00E9 s\u00EDly lze z\u00EDskat spolehliv\u00E9 kvalitativn\u00ED a kvantitativn\u00ED pdaje o vodn\u00EDch rostlin\u00E1ch a dn\u011B. Budou vyjasn\u011Bny ot\u00E1zky identifikace velikosti a p\u0159esn\u00E9 posice objekt\u016F v sonarov\u00E9m ku\u017Eeli, rozonance a pohlcov\u00E1n\u00ED ultrazvuku. Pro 7 \u010Deled\u00ED sladkovodn\u00EDch ryb (cca 25 druh\u016F) a pro \u0159adu ichtyo, zoo- a fytoplanktonn\u00EDch organism\u016F budou stanoveny z\u00E1vislosti mezi druhy pozorovan\u00FDch ryb, jejich velikost\u00ED a orientac\u00ED t\u011Bla v\u016F\u010Di ultrazvukov\u00E9mu sonaru ku\u017Eelu sonaru. Z\u00EDskan\u00E9 informace budou pou\u017Eity na trojrozm\u011Brn\u00E9 rozpozn\u00E1v\u00E1n\u00ED sm\u011Bru a rychlosti pohybu a orientace ryb v sonarov\u00E9m ku\u017Eeli, kter\u00E9 umo\u017En\u00ED p\u0159esn\u00E9 stanoven\u00ED velikosti sledovan\u00FDch organism\u016F." . . " scattering" . . . . . "Echosonder" . "IAA6017901" . " sediments" . " aquatic plants" . . " marcophytes" . . " fish siying" . "8"^^ . "8"^^ . . . "The project proposed is aimed to assess and overcome the main limitations in the usage of echosounders in shallow fresh waters. The main hypotheses to be tested are 1) expecially with splitbeam systems it will be possible to study fish, large invertebrate and bubble quantity, size and behaviour in all waters deeper than 1 m, 2) integration of volume-scattering strength provides reliable qualitative and quantitative data about macrophytes and bottom. Limitations of target detecability sizing, positioning and sound absorption will be addressed. The relationships between fish species, size and aspect and range in the ultrasonic beam will be estimated for seven freshwater fish families (25 fish species) and for a number of ichthyo-,zoo- and phytoplankton organisms. The above relationships together with the split-beam three dimensional fish tracking (which should provide the aspect of actively swimming fish) will be used for the calculation of the swimming direction and speed and real size."@en . " inverterbrate detection" . . . . " noise" . " fish detection" . " bubbles" . "Byla rozpracov\u00E1na metodika detekce ryb, bezobratl\u00FDch, vodn\u00EDch rostlin, bublin a dna vod. n\u00E1dr. v\u011Bdeck\u00FDmi echoloty. V\u00FDsledky detailn\u00EDho studia ozv\u016F ryb v\u0161ech velikost\u00ED zp\u0159esn\u00ED jejich detekci a interpretaci z\u00E1znam\u016F."@cs . "2007-01-15+01:00"^^ . "0"^^ . " echointegration" . "http://www.isvav.cz/projectDetail.do?rowId=IAA6017901"^^ . "Akustick\u00E9 metody zji\u0161\u0165ov\u00E1n\u00ED biotick\u00FDch a abiotick\u00FDch parametr\u016F vodn\u00EDho prost\u0159ed\u00ED" . "0"^^ . "2"^^ . " sonar" . . "Acoustic methods for assessment of biotic and abiotic parameters of water environment"@en . . "Echosonder; sonar; fish detection; fish siying; echo definition; scattering; inverterbrate detection; marcophytes; aquatic plants; biomass; echointegration; sediments; bubbles; noise; reverberation;"@en . . " echo definition" . " biomass" . . . " reverberation" .