National Repository of Grey Literature 4 records found  Search took 0.00 seconds. 
The solution of damaces caused by especially protected animals at the school fishing farm Protivín
PÁRTL, Jan
At present fish predators are inflicting a great damage to fish. The most extensive damages are caused by two species {--} the otter and the cormorant. They were tracked from 2001 to 2006 with the result that the damages depend on the number of those predators.
Qualitative analyses of the diet in great cormorant (Phalacrocorax carbo): Is there a match between size and species distribution of fish in the diet and in environment?
Valigurová, Barbora ; Čech, Martin (advisor) ; Musil, Petr (referee)
Great cormorant (Phalacrocorax carbo) diet has long been debated in many studies. There are several method of dietary assessment and each method possibly yield different depictions of the diet. Simultaneously, many studies evaluate cormorant impact upon fishery yields without taking account of some important ecological factors essential for such evaluation. One of crucial factors is a fish-community composition of particular waterbodies. But its evaluation is methodically exacting and many biases can emerge, depending on particular method. Its also time-and-money-consuming to evaluate fish-community composition and thus authors, who take it into consideration, often use unverifiable local organizations data. Such data should not be in base of discussions about cormorant impact upon natural fish populations. Since ecological background is too complex, general principles of cormorants impact is ambiguous so far. It is important to do more studies with more accurate fish-community composition data. Powered by TCPDF (www.tcpdf.org)
BIOLOGICAL AND ECONOMICAL EVALUTION OF MANAGEMENT INSTRUMENTS REDUCING THE PREDACY OF THE CORMORAN IN THE CZECH REPUBLIC
SEDLECKÝ, Pavel
The topic of my thesis is concerning the ecological and economical evaluation of damages caused by the cormorant, (Phalacrocorax carbo sinensis) using the CVM metod (Contingent Valuation Method). My aim was to accent the opinion of the Třeboň region inhabitants

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