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Trade with Grey Parrot (\kur{Psittacus erithacus}) in EU in relation to third countries
GALLISTLOVÁ, Renata
International trade in exotic pets is an important and increasing driver of biodiversity loss. The African grey parrot has been noted as one of man's friendliest pets with popularity attributed to its intelligence, cognitive and communicative abilities. Worldwide, the African Grey Parrot is the third most commonly traded wild bird species. The subject of this thesis is an evaluation of international trade in the gray parrot (\kur{Psittacus erithacus}), covered by CITES convention to Appendix II, between European Union and third countries, according CITES Trade Database and EC Annual Report 2004 in 1994-2013. The trade has been divided into export and import, by the two existing subspecies, and within these categories were evaluated main countries of export and import, source and purpose of the trade. It was found, that the trend of import of live specimens to EU during the period 1994-2005 was increasing, although the trend between 2006-2013 was declining. The trend of export of live specimens was slightly increasing for the period 1994-2001 and 2006-2013.
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The ethology of gorilla (\kur{Gorilla gorilla}) in nature and captivity
GALLISTLOVÁ, Renata
Results of ethological studies on gorillas are mainly based on the observation of the behavioural traits of mountain gorillas in the wild. Gorillas living in zoos have adapted to small spaces and being exposed to quite a few visitors. Long-term stress, nutritionally unbalanced diet and other factors create risks associated with abnormal behaviour such as covering their ears which had never been seen before in the wilderness. Zoos try to provide the most suitable environment to gorillas to eliminate these behavioural traits. For instance, they create a suitable social group, a ragged living habitat with hiding places, or various activities to support the typical behaviour of gorilla species. Thank to the introduction of envrionmental enrichment of food, their feeding time has been prolonged with the consequent reduction of vomiting and the resumption of food intake. In addition, brain teasers like puzzles encourage the cognitive process of gorillas.
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