Hlavní stránka > Výsledky hledání: 999C1a:IMMEDIATE303466 0753 96-0195 96-0195 podpora na dlouhodoby koncepčni rozvoj vyzkumne organizace – Moravska zemska knihovna v Brně podpora na dlouhodoby koncepčni rozvoj vyzkumne organizace – Moravska zemska knihovna v Brně podpora na dlouhodoby koncepčni rozvoj vyzkumne organizace – Moravska zemska knihovna v Brně IIIB CADSES PANET (5D194)-"the GFL / 1. Impact of introduced American mink (Mustela vison) predation on endangered stone crayfish (Austropotamobius torrentium) was examined in western Bohemian middle-sized streams for two years. Mink diet selectivity and its impact on its prey abundance were been investigating as the main target of this study. 2. The mink diet was described from excrements which were found on the target areas. The importance of different types of prey was specified by their relative numeric contribution to diet. The number of hunted crayfish was elicited from the number of crayfish remains which were collected during two years. The crayfish abundance was determined by capture {--} recapture method. 3. The crayfish was most frequently observed component of mink diet. The rate of mink predation on crayfish was dependent on density of crayfish population. This observed rate was lower during winters than during summers. The mink preferred significantly longer crayfish than was the mean of this value in population. 4. Although the crayfish was important part of mink diet the trend of impact of mink on crayfish is still inexplicit. It would be important to continue in this research to determine correlation between these two species. / 2328-2714-4829 IIIB CADSES PANET (5D194)-"- GFL / 2328-2714-4829 DKRVO ALTEC-KIT DKRVO
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