نتایج جستجو برای: ostriches
تعداد نتایج: 392 فیلتر نتایج به سال:
BERTRAM, B.C. R. 1980. Vigilance and group sizes in ostriches. Anim. Behav. 28: 278-286. CARACO, T. 1979a. Time budgeting and group size: a test of theory. Ecology 60: 618-627. 1979b. Time budgeting and group size: a theory. Ecology 60: 611-617. 1980. Stochastic dynamics of avian foraging flocks. Amer. Natur. 115: 262-275. --, S. MakRTINDALE, & H. R. PULLIAM. 1980. Avian flocking in the presenc...
In Canada, ostriches are now slaughtered for their meat and hides. The mortality rate in ostrich farming is highest in chick units. An increased chick survival rate impacts positively on production and profit. This paper will focus on common health disorders that affect chick production costs. These are discussed under the following categories: digestive, orthopedic, respiratory, and integument...
Abstract As a result of numerous fossil and subfossil finds ostriches, there is great demand for comprehensive osteometric dataset the living species subspecies genus Struthio. We meet this by providing set > 100 measurements sample 18 sexed skeletons, including all recently extinct ostriches. provide first mensural data two subspecies, hitherto questioned Struthio camelus spatzi from no...
A scanning electron-microscope examination of the scolex of Houttuynia struthionis, a cestode of ostriches, was undertaken in order to study its surface structure. The scolex differs from those of other subfamilies in the family Davaineidae in that it does not have scale-like spines covering the base of the rostellum. Instead, the base is covered with small hooks resembling the larger rostellar...
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