Untersuchungen der Federstruktur von Entenvögeln nach Kontamination mit veschiedenen Ölqualitäten und Reinigung ("Waschung") zur Beurteilung möglicher Gefiederschädigungen im Hinblick auf die Etablierung einer Triage

• Main Author: Schicke, Sandra
• Format: Doctoral or Postdoctoral Thesis
• Language: German
• Published: Tierärztliche Hochschule 2012
• Subjects: thesis; Doktorarbeit; ddc:630; Verzeichnis wissenschaftlicher Veröffentlichungen; Hochschulbibliographie allgemein; Erdöl; Kontamination; Gefieder; Schädigung; Ente; Hochschulschrift; Dissertation; Gefiederschäden; Verölung; Triage; plumage damages; oil contamination; Common Eider; Somateria mollissima
• Online Access: https://nbn-resolving.org/urn:nbn:de:gbv:95-102412; https://elib.tiho-hannover.de/receive/etd_mods_00000867; https://elib.tiho-hannover.de/servlets/MCRFileNodeServlet/etd_derivate_00000867/schickes_ws12.pdf; http://gso.gbv.de/DB=2.1/PPNSET?PPN=733891306

Breast feathers from Common Eiders (Somateria mollissima) and Mallards (Anas platyrhynchos) were contaminated at two different time intervals (24 hours and two weeks) comparatively with four different grades of oil (Light Crude Oil, Middle-Weight Crude Oil, Marine Diesel Oil, Heavy Fuel Oil). Besides the oil contamination, a sand contamination was performed in single feathers. After the cleaning process the feathers were examined microscopically, additionally measurements of the Critical Penetration Pressure and of the water absorption after water contact for 24 hours were performed to analyse damages in structure and function. The results showed no clear relation between the oil grade and the extent of feather damage. Both, the Critical Penetration Pressure and the water absorption disclosed no statistically relevant differences. Sporadically occurring damages in feather structure were seen in all four oil groups but without any plausible significances. Differences between the one-day exposure period and the 14-days exposure period were observed only in isolated cases. In comparison to short-term contamination, feathers of the Common Eider showed a significant increase of barbule breakings following long-term contamination with Marine Diesel Oil or Middle-Weight Crude Oil, which were not found in Mallard feathers contaminated with the same oil grades. After long-term contamination with Middle-Weight Crude Oil or Heavy Fuel Oil Mallard feathers had better results in water-repellancy compared to the one-day exposure period. In the Middle-Weight Crude Oil group, feathers of the Common Eider also revealed high levels of the CPP after long-term exposure as well as low water absorption in case of the Heavy Fuel Oil. In contrast, the subjective evaluation indicated worse results after long-term oiling seen in both species. A definite correlation between results and exposure period could not be demonstrated. In Common Eiders, the significant increase of barbule breakings following short-term contamination with Light ...