El conocimiento sobre la diversidad y poblaciones de ciertos órdenes aves hábitos terrestres tales como los Tinamiformes, Galliformes, Columbiformes Gruiformes bosques tierra firme Amazonía ecuatoriana es aún incipiente. Por ello, este estudio buscó evaluar riqueza abundancia estos taxones en comunidad waodani Toñampade, mediante técnica del fototrampeo. Desde el 6 julio hasta 9 octubre año 202...

Fertility is fundamental to reproductive success, but not all copulation attempts result in a fertilized embryo. Fertilization failure especially costly for females, we still lack clear understanding of the causes variation female fertility across taxa. Birds make useful model system research, partly because their large eggs are easily studied outside female's body, also wealth data available o...

Kosin and Ishizaki (1959) reported on the presence of a sex difference in the interphase nuclei of duodenal muscles and of both dermal and epidermal components of feathers in 3-week old chickens. A similar situation was also observed in the chicken blastoderms and amnion cells (Ishizaki and Kosin 1960). Ohno et al. (1960), Moore and Hay (1961), Azarova (1961), Takeuchi (1963), and Limborgh (196...

We tested the aerodynamic function of nasal conchae in birds using CT data from an adult male wild turkey (Meleagris gallopavo) to construct 3D models of its nasal passage. A series of digital "turbinectomies" were performed on these models and computational fluid dynamic analyses were performed to simulate resting inspiration. Models with turbinates removed were compared to the original, unmod...

The resolution of rapid evolutionary radiations or "bushes" in the tree of life has been one of the most difficult and interesting problems in phylogenetics. The avian order Galliformes appears to have undergone several rapid radiations that have limited the resolution of prior studies and obscured the position of taxa important both agriculturally and as model systems (chicken, turkey, Japanes...

Coprological examination of 15 Indian peacocks, Pavo cristatus, revealed the presence of a coccidium species of the genus Eimeria, which apparently represents a previously undescribed species. Sporulation is exogenous and fully developed oocysts of Eimeria pavoaegyptica sp. nov. are ellipsoidal, with a dimension of 15 (13-16) × 12 (10-12.9) microm and with a shape index of 1.25 (1-1.3). The spo...

The pathology induced in turkeys (Meleagris gallopavo) by two capillariid nematodes, Baruscapillaria obsignata and Eucoleus annulatus is described together with data on prevalences, mean infection and range of worm burdens. B. obsignata occurred with a prevalence of 72.5% in the 40 examined hosts in a range of 2-461 nematodes and a mean intensity of 68.6, whereas E. annulatus was present in 2.5...