Biology and ecology of crocodiles (order Crocodylia)

Dvorski, Paula (2009) Biology and ecology of crocodiles (order Crocodylia). Bachelor's thesis, Faculty of Science > Department of Biology.

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Abstract

Crocodiles had turned up on our planet 240 million years ago. At first they were small land animals, yet the enhancement of world climate enabled them to grow into much bigger forms like Deinosuchusa, whose lenght reached up to 13 meters. However, climate gradually changed and so did the position of continents, which made crocodiles adapt to new life conditions. Crocodiles today measure up to 7 meters and are the largest living reptiles on Earth. Within Reptilia class are a few specific anatomical characteristics that are adaptations to the predatorian and semi-acquatic way of life. A strong jaw, secondary palate, four – chambered heart, diaphragm and a gastric acid – making mechanism are just a few of them. Specific kinds of behaviours, that are best seen at the processes of thermoregulation, breeding and stalking of prey, also play a very important role. Formerly a more numerous order, today is counting only 23 species that are divided into three families: Alligatoridae, Crocodylidae and Gavialidae, which live in the tropical and subtropical lands. Man's actions more and more endanger this interesting specie that makes the last remains of the mezozoic fauna. It would be a shame not to act and let only remaining dinosaurs' contemporaries decay.

Item Type: Thesis (Bachelor's thesis)
Supervisor: Mrakovčić, Milorad
Date: 2009
Number of Pages: 26
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 22 Dec 2014 10:04
Last Modified: 22 Dec 2014 10:04
URI: http://digre.pmf.unizg.hr/id/eprint/3568

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