| prevalence and intensity of haemoproteus columbae in three species of wild doves from brazil. | the prevalence and intensity of blood parasites in three species of wild doves were studied in the municipality of junqueirópolis, in the western region of the state of são paulo, brazil. three species of doves were surveyed: 331 specimens of zenaida auriculata des murs, 1847, 62 specimens of columbina talpacoti temminck, 1811 and 57 specimens of scardafella squammata lesson, 1831. haemoproteus columbae kruse, 1890 was found in blood from all the doves species. the prevalence of this parasite wa ... | 2001 | 11285493 |
| eimeria curvata n. sp.(apicomplexa: eimeriidae) in columbina talpacoti and scardafella squammata (aves: columbidae) from brazil. | eimeria curvata is a new coccidian described in the doves columbina talpacoti and scardafella squammata from western of the state of são paulo, brazil. the oocysts are ovoid to ellipsoid, 18.3 (17-19) microm x 15.5 (15-17) microm, with a shape index of 1.2 (1.1-1.3). the wall is colorless, smooth and double-layered. a polar granule is present, but there is no micropyle or oocyst residuum. the sporocysts are elongate, 12.3 (11.5-13) microm x 5.8 (5.5-6) microm with a curved anterior portion and a ... | 2006 | 10656705 |
| effects of position and flock size on vigilance and foraging behaviour of the scaled dove columbina squammata. | amongst the benefits of foraging in flocks are the enhancement of food finding and predation avoidance. characteristics such as size, individual position, as well as position and distance between members are factors that may influence vigilance and foraging. in a study using scaled doves, columbina squammata, i observed a negative correlation between group size and vigilance and a positive correlation with time spent foraging, which suggests a reduction of costs and an increase of benefits as a ... | 2006 | 16860945 |