منابع مشابه
A comparison of the helminth communities in Anas undulata, Anas erythrorhyncha, Anas capensis and Anas smithii at Barberspan, South Africa.
Examination of the helminth communities in 25 yellow-billed ducks (Anas undulata), 21 red-billed ducks (Anas erythrorhyncha), ten Cape teal (Anas capensis) and seven Cape shovellers (Anas smithii) that had overwintered at Barberspan, revealed differences in community structure. Infracommunities in yellow-billed and red-billed ducks were characterized by low diversity and high eveness, and gener...
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Mit Namen gezeichnete Artikel geben die persönliche Meinung des Verfassers wieder. Nachdruck aller Beiträge nur nach Rücksprache mit der Redaktion Der Gründungsausschuß für die Universität Oldenburg, das Konzil und der Senat der Universität Oldenburg haben einstimmig beschlossen, daß die Universität Oldenburg den Namen Carl-von-Ossietzky-Universität führt. Die Universität bedauert, daß ihr die ...
متن کاملRotational Dynamics of Europa
The rotational state of Europa is only rather poorly constrained at present. It is known to rotate about an axis that is nearly perpendicular to the orbit plane, at a rate that is nearly constant and approximates the mean orbital rate. Small departures from a constant rotation rate and oscillations of the rotation axis both lead to stresses that may influence the location and orientation of sur...
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 کاملHeteropatric speciation in a duck, Anas crecca.
Heteropatric differentiation is a mode of speciation with gene flow in which divergence occurs between lineages that are in sympatry and allopatry at different times during cyclic spatial movements. Empirical evidence suggests that heteropatric differentiation may prove to be common among seasonally migratory organisms. We examined genetic differentiation between the sedentary Aleutian Islands ...
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ژورنال
عنوان ژورنال: Journal für Ornithologie
سال: 1871
ISSN: 0021-8375,1439-0361
DOI: 10.1007/bf02252646