Home > Search Results: recid:258460
Search:
 
Search Tips :: Simple Search
Search collections:
Sort by: Display results: Output format:
National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 

(100)
Melanin-based ornaments of birds and their relationship to individual condition
 Straka, Antonín ; Svobodová, Jana (advisor) ; Karlíková, Zuzana (referee)
This thesis summarizes findings from literature about the melanin pigment and its properties, melanogenesis, factors affecting the synthesis and tissue deposition of melanin, methods for analysis of ornamental traits of birds, and the relationship of melanin-based ornaments and individual condition. Current studies show that the expression of melanin plumage can be condition-dependent; size or chroma of ornaments frequently signals individual condition. The relationship between condition indicators and the melanin pigment is found more often in achromatic species than in species with melanin- and carotenoid-based plumage. There's a lack of research dealing with pheomelanin ornaments. Statistical analysis of data obtained from adult male great tits (Parus major) captured during the nesting seasons 2014 and 2015 on sites Čimický háj and Ďáblický háj in Prague was carried out to test the relationship between the size of the melanin-based breast stripe and standardized weight, absolute leukocyte count and tarsus length. Results didn't confirm a link between the area of the breast ornament and analyzed indicators of condition. Future research will take into account other condition parameters which could contribute to explain the role of the breast stripe in sexual selection in the great tit.
Detailed record

Interested in being notified about new results for this query?
Subscribe to the RSS feed.
Digital Repository :: Search :: Submit :: Personalize :: Help
Powered by Invenio v1.1.2
Maintained by admin.invenio@techlib.cz
This site is also available in the following languages:
Česky  English