Retinal photoreceptors of paleognathous birds: the ostrich (Struthio camelus) and rhea (Rhea americana)

Retinal photoreceptors of paleognathous birds: the ostrich (Struthio camelus) and rhea (Rhea americana)

Microspectrophotometry was used to determine the absorbance spectra of both rod and cone visual pigments and oil droplets from the retinae of the ostrich (Struthio camelus) and rhea (Rhea americana). Light and fluorescence microscopy of whole fresh tissue mounts were used to determine the relative numbers and distribution of oil droplets in the retinae. Both species possessed rods, double cones...

Serosurvey of selected avian pathogens in brazilian commercial rheas (Rhea americana) and ostriches (Struthio camelus)

Occurrence of antibodies to Toxoplasma gondii in rheas (Rhea americana) and ostriches (Struthio camelus) from farms of different Brazilian regions Ocorrência de anticorpos Toxoplasma gondii em emas (Rhea americana) e avestruzes (Struthio camelus) de propriedades de diferentes regiões brasileiras

This study aimed to verify the occurrence of antibodies against Toxoplasma gondii in rheas (Rhea americana) and ostriches (Struthio camelus) commercially breeding in Brazil. Blood samples from 20 rheas and 46 ostriches (young and adults) were serologically tested using a technique known as modified agglutination test (MAT) at an initial titration of 1:16 for ostriches and 1:25 for rheas. Antibo...

Cooperative breeding between males in the Greater Rhea Rhea americana

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Histomoniasis in a captive great rhea (Rhea americana).