Birds and Man

Oxidative and Nitrosative Stresses: Their Role in Health and Disease in Man and Birds

The concept of oxidative stress (OS) was originally used by Professor Helmut Sies who described it as “an imbalance between oxidants and antioxidants in favor of the oxidants, potentially leading to damage” with the ratio of oxidants to antioxidants as >1 (Sies, 1997). Oxidative/nitrosative stress represents the bodies’ imbalance in the production and the elimination of reactive oxygen and nitr...

Oxidative and Nitrosative Stresses: Their Role in Health and Disease in Man and Birds

Free-ranging birds Captive birds Songbirds Free-ranging birds Captive birds Waterfowl Free-ranging birds Captive birds Herons and allies Free-ranging birds Captive birds Pigeons and doves Free-ranging birds Captive birds

Cause Chlamydiosis refers to an infection with organisms of the genus Chlamydia sp., which are bacteria that live within animal cells. Chlamydia psittaci is the species generally associated with this disease in birds. The severity of the disease differs by the strain of C. psittaci and the susceptibility of different species of birds. As a result, chlamydiosis may range from an inapparent infec...

A new philosophy of man and humanism

The theoretical basis for the new philosophy was laid by the American philosopher James Joseph Dagenais (1923-1981), who came to the conclusion that philosophical anthropology is not a science, but a domain unto itself, and that a philosophy of man can only come about as a joint undertaking of all sciences, in which the object of study must be man himself. The final explanation of man lies outs...

Fossil birds from the hawaiian islands: evidence for wholesale extinction by man before Western contact.

Thousands of fossil bird bones from the Hawaiian Islands collected since 1971 include remains of at least 39 species of land birds that are not known to have survived into the historic period; this more than doubles the number of endemic species of land birds previously known from the main islands. Bones were found in deposits of late Quaternary age; most are Holocene and many are contemporaneo...