Within-brood social status and consequences for winter hierarchies amongst Mallard Anas platyrhynchos ducklings
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Impact of oil-sands based wetlands on the growth of mallard (Anas platyrhynchos) ducklings.
Identifying the potential effects of industrially formed wetlands on waterfowl populations is important for assessing the suitability of such wetlands in industrial reclamation strategies. Mallard ducklings were held in situ on two industrially formed wetlands and one reference wetland in northern Alberta, Canada. Duckling mass and skeletal size were measured at regular intervals over 33 d, and...
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Weidmann 1956; Johnsgard 1965; McKinney compartment was then placed into a 90 ft x 90 ft x 12 ft flight pen. Thus, each of the two observation 1965a, 1969, 1970), and quantitative data are pens had a group of four pairs that had been visually available for visual displays of a few species separated for 5 months. of ducks (e.g., Weidmann 1958; Weidmann Birds were individually marked with colored...
متن کاملRelationships between circulating leucocytes and Leucocytozoon simondi in mallard, Anas platyrhynchos, ducklings.
Leucocytozoon simondi is an apicomplexan blood parasite of waterfowl that frequently causes significant mortality, and thus is expected to provoke a significant immune response in hosts. Using blood smears collected in consecutive weeks from 30 wild-stock mallard, Anas platyrhynchos, ducklings, we tested with repeated measures analyses for associations between leucocyte profiles and L. simondi ...
متن کاملMalignant Melanoma in a Female Mallard Duck (Anas platyrhynchos)
Melanomas are malignant neoplasms originating from melanocytes. They reported in birds. In this case, macroscopic and microscopic (the histopathologic and IHC) findings supported a final diagnosis of cutaneous malignant melanoma in a mallard duck (Anas platyrhynchos). A female mallard duck (Anas platyrhynchos) was observed with a mass on the ventral portion of the neck. Th...
متن کاملMechanics of feeding in the Mallard ( Anas platyrhynchos L
Mechanics of feeding in the Mallard (Anas platyrhynchos L.; Aves, Anseriformes).--G. A. Zweers, A. F. C. Gerritsen, and P. J. van Kranenburg-Voogd. 1977. Contributions to Vertebrate Evolution, vol. $. vii + 109 pp., 20 figures. Paper $19.75.--For many years, primarily since the 1920's and 1950's, arian morphology has progressively become less descriptive and more functional in its approach. Emp...
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ژورنال
عنوان ژورنال: Journal of Ornithology
سال: 2008
ISSN: 2193-7192,2193-7206
DOI: 10.1007/s10336-008-0334-6