Influence of introduced predators and natural stressors on escape behavior and endocrine mechanisms in an island species, the Galápagos marine iguana (Amblyrhynchus cristatus) [Elektronische Ressource] / vorgelegt von Silke Berger

Abteilung Experimentelle Ökologie der Tiere Universität Ulm ___________________________________________________________________________ Influence of introduced predators and natural stressors on escape behavior and endocrine mechanisms in an island species, the Galápagos marine iguana (Amblyrhynchus cristatus) ___________________________________________________________________________ Dissertation zur Erlangung des Doktorgrades Dr. rer. nat. Fakultät für Naturwissenschaften der Universität Ulm vorgelegt von Silke Berger aus Crailsheim 2006 AMTIERENDER DEKAN: Prof. Dr. Klaus-Dieter Spindler ERSTER GUTACHTER: Prof. Dr. Elisabeth K. V. Kalko ZWEITER GUTACHTER: Prof. Dr. Harald Wolf Tag der mündlichen Prüfung: 29.11.2006 “Perhaps this singular piece of apparent stupidity may be accounted for by the circumstance, that this reptile has no enemy whatever on shore.” Charles Darwin Table of contents Summary 7 REFRENCES 18 Zusammenfassung 25 Chapter 1: The influence of life history stages on flight initiation distance in naïve Galápagos marine iguanas 1. ABSTRACT 32INODUION 4 1.3 METHS 36 1.3.1 tudy site 12Animal 36 1.3.3 Measuring anti-predator behavior by flight initiation distance (FID) 37 1.3.4 Testing the influence of various factors on FID 37 1.35 Staistc 381.