منابع مشابه
Prevalence of Blood Parasites in Migrating and Wintering California Hawks
—Infectious diseases can potentially affect the seasonal migration of hawks. We tested three species of California hawks from autumn 2004 to spring 2006 for haemosporidian blood parasites (Plasmodium, Haemoproteus, and Leucocytozoon spp.). We screened 323 Red-tailed Hawks (Buteo jamaicensis), 100 Cooper’s Hawks (Accipiter cooperii), and 21 Red-shouldered Hawks (B. lineatus) for blood parasites ...
متن کاملNutritional condition and serum biochemistry for free-living Swainson's Hawks wintering in central Argentina.
We assessed the nutritional condition and established reference values for serum chemistry parameters in a long distance migrant bird of prey, the Swainson's Hawk (Buteo swainsoni), wintering in central Argentina. We analyzed serum concentration of urea, uric acid, cholesterol, and triglycerides and assessed age and sex related differences in these parameters. A body condition index was obtaine...
متن کاملComparative Hematology and Plasma Biochemistry of Redtailed Hawks and American Kestrels Wintering in California
A•STRACT.--In December and January of the winters of 1990-91, 1991-92, and 1992-93, blood samples were collected from 52 Red-railed Hawks (Buteojamaicensis) and 91 American Kestrels (b•lco sparverius). Twenty-five blood parameters were measured, including white blood cell components, plasma enzyme activities, and plasma chemistry concentrations. Interspecific comparisons were made to identify s...
متن کاملChicks, Hawks, and Patriarchal Institutions:
Cooperation occurs only in the shadow of conflict. Conflict lies at the heart of sexual reproduction.
متن کاملHow Inflation Hawks Escape Expectations Traps
Sylvain Leduc is a senior economist in the Research Department of the Philadelphia Fed. hy did inflation increase so dramatically from the 1960s to the 1970s? Thats a question economists are still debating. One possible theory, however, is that once people started believing inflation would rise, the Fed was forced to validate those expectations by increasing the money supply. Sylvain Leduc dis...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1956
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay1896