Abstracts - Deutsche Zoologische Gesellschaft

166 Morphology Postershave, unlike other mammals in which usually three fibre types are distinguished (type I: oxidative,slow, fatigue resistant; IIa: oxidative-glycolytic, intermediate; IIb: glycolytic, fast, fatiguing), noclassical type IIb fibres. But several studies reported II a/x fibres which are intermediate in theircharacteristics between type I and IIa. In this study, the fibre type distribution in the perivertebralmuscles of the Beagle was investigated to 1) determine the fibre type composition along the trunk,2) verify previous results from biopsies, and 3) test whether the dog’s muscles show morphologicalspecialisations to function as local stabilisers and global stabilisers and mobilizers as described forsmall non-cursorial mammals. From two adult males, serial cross-sections were prepared from T11to L7 and muscle fibre types were identified at the middle of each vertebra and the intervertebraldiscs using enzyme- and immune-histochemical methods. By using a specific antibody against typeIIb myosin, the lack of IIb fibres was confirmed. The results point to a higher oxidative capacity in allback muscles compared to smaller mammals, which is in accordance to the biopsy results of dogs.P MO.33 - ENAvian striding locomotion: kinematics and spatio-temporal gait characteristicsAlexander StößelInstitut für Spezielle Zoologie und Evolutionsbiologie mit Phyletischem Museum, Friedrich-Schiller-Universität JenaAlthough birds represent the majority of extant bipedal vertebrate species, few studies investigatedavian terrestrial locomotion under morphofunctional aspects. Amongst others, this owes to the factthat the avian femur is affiliated with the trunk and large parts of the avian pelvic limb are obscuredby the wings and feathers. Therefore, movements of the hindlimb can not be accurately analysedwithout cineradiography. Also, very little is known about non-parasagittal movements of the hindlimbas well as motions of the pelvis of birds. In this study, characteristics of avian striding locomotionare analysed by quantifying hindlimb segmental kinematics and spatio-temporal gait parametersof three distantantly related bird species (Eudromia elegans, Coturnix coturnix, Corvus monedula).Birds were synchronously filmed out of two planes by high-speed cineradiographic cameras, whilemoving on a treadmill across a wide range of speeds in order to quantify three dimensional movementsof the entire avian hindlimb and pelvis accurately for the first time. Non-sagittal changes inlimb position are specified. Preliminary results suggest that hindlimb kinematic patterns of the threespecies show a similar and conservative character.P MO.34 - ENThe coxal glands of Pseudocellus pearsei (Ricinulei, Arachnida) – 3D visualization andultrastructureGiovanni Talarico, Elisabeth Lipke, Gerd AlbertiZoologisches Institut & Museum, Ernst-Moritz-Arndt-Universität GreifswaldArthropod coxal glands function as osmoregulatory/excretory organs. They are thought to be derivedfrom nephridia. In arachnids these organs predominantly regulate the water balance, the ionconcentration and the osmotic value of body liquids and therefore, the volume of the hemolymph.Generally speaking, coxal glands are divided into two morphological and functional different parts– (1) the saccule (= sacculus; with podocyte epithelium) and (2) the tubule (= nephridial canal; withtransport epithelium). Within the arachnids, the coxal glands have undergone various modifications