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Comparison of efficiency of different electrofishing techniques for juvenile fish estimates on river beach
Janáč, Michal ; Jurajda, Pavel
The efficiency of three PAS electrofishing techniques (direct electrofishing, throwing of anode and remote electrofishing) for 0+ juvenile fish estimates was tested on gravel beaches of the Morava River. All three techniques yielded significantly different assemblage structure (in terms of relative abundances of most abundant species). Both direct electrofishing and throwing of anode disturbed fish what lowered their efficiency on these shallow habitats (30% efficiency in comparison with remote electrofishing). Remote electrofishing was the most effective technique; moreover it yielded significantly more species per locality than other two techniques. Higher time consumption, caused by higher number of fish caught, may be its only constrain in common monitoring, however it is negligible in comparison with its benefits.
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The influence of ploidy on the complete blood count in silver crucian carp
Vetešník, Lukáš ; Halačka, Karel ; Lusková, Věra ; Lusk, Stanislav
In the sample of 27 specimens of silver crucian carp (Carassius auratus) of different ploidy (5 diploids, 21 triploids and 1 tetraploid), the red component of complete blood count was found. Using the analysis of variance test, highly significantly lower erythrocyte count, insignificantly lower haemoglobin count and haematocrit value were proved. The mean corpuscular volume was increasing significantly with the ploidy increased, and mean corpuscular haemoglobin was increasing highly significantly with the ploidy increased.The tetraploid specimen indicated similar trend depending on the higher ploidy level.
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Development of brown trout (Salmo trutta) after hatching: comparative analysis of parents influence, originating from the natural and artificial living environment
Prokeš, Miroslav ; Randák, T. ; Peňáz, Milan ; Baruš, Vlastimil ; Žlábek, V.
Early development of brown trout (Salmo trutta L.) in the period after hatching was analysed. Three different series (A, B, C) of eleuterembryos, larvae and juveniles were compared by means of selected morphometry parameters (total length, fork length, standard length, head length, body depth, yolk sac length, height and depth, body height, mouth width and mouth diameter). Development of fry originating from parents from natural environment (line A) and from artificial environment (line B) was standard without significant differences. Growth rate of fry in line C (female from artificial environment and male from natural conditions) was slower in the period with exogenous nutrition. Combination C showed from a stand point of ours results as a little acceptable for production of fish stock.
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Early development of ide (Leuciscus idus): species determining parameters
Prokeš, Miroslav ; Peňáz, Milan ; Baruš, Vlastimil ; Hamáčková, J. ; Lepič, P. ; Kozák, P. ; Policar, T.
Main species determinant characters of dace (Leuciscus idus) in the early ontogeny were described and compared with analogical parameters referred in literature with chub (Leuciscus cephalus) and dace (Leuciscus leuciscus). Dealt about of morphological and morphometrical characteristics of eggs, free embryos, larvae and juvenile individuals (egg diameters, embryo lengths at hatching, larvae lengths at the start of exogenous nutrition, juvenile individuals lengths at the time of scale formation, number of body and caudal segments, number of fin rays, number of scales, mouth and fin position, caudal fin laps depth, fin coloration, pigmentation and next characters). The ide is morphologically very similar with the chub and dace. Species determination during early ontogeny is difficult.
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Strategie inovace terciárního vzdělání: vytváření znalostí III. modu a osobní kapitál
Vitásková, Anna ; Harkins, A.
The goal of this paper is to demonstrate how personal capital and social capital can be enhanced by the recognition and development of Mode III knowledge production. Our approach employs nine sets of framers (technology, context, process, knowledge, culture/value, role, learning, application, policy/decision) for tertiary education services in support of routine, continuous innovation at the level of the individual.It is assumed that simple framers can be acquired by žordinary individuals practicing implicate professionalism, and that their communication and collaboration with tertiary education can thereby expand. Our guiding assumptions has been that tacit knowledge is positioned within the individual, and that explicit knowledge emerges as a product of individuals who endeavor to selectively apply their knowledge in the forms of personal and social capital in support of continuous innovation.
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