Functional correlation between habitat use and leg morphology in birds (Aves)
نویسندگان
چکیده
منابع مشابه
Functional correlation between habitat use and leg morphology in birds (Aves)
Many of the morphological features of animals are considered to be adaptations to the habitat that the animals utilize. The habitats utilized by birds vary, perhaps more than for any other group of vertebrates. Here, we study possible adaptations in the morphology of the skeletal elements of the hind limbs to the habitat of birds. Measurements of the lengths of the femur, tibiotarsus and tarsom...
متن کاملinvestigating discourse markers use in spoken language between iranian tefl students and english native speakers
چارچوب نظری این مطالعه شامل یک گزارش عملکردی است و مبتنی بر تعریف شیفرین (1987) از مدل چند بعدی وابستگی مطالب است. این مطالعه 10 نشانگر گفتمان (بنابراین ، بله ، بسیار خوب ، باشه ، می دانید ، خوب ، چون، من فکر می کنم ، منظور من این است که ، در واقع) را با توجه به الگوی عملکردی مشلر(1994) در مورد نشانگرهای گفتمان طبقه بندی می کند. این مطالعه به بررسی مشخصات وقوع این عناصر در گفتار فی البداهه دانش...
15 صفحه اولPhilippine Birds of Prey: Interrelations among Habitat, Morphology, and Behavior
--We sought to clarify relationships among morphometrics, behavior, and ecological variables for 21 species of raptors in the Philippines. Morphological space was defined by 42 external characters analyzed as shape variables with respect o body length (without tail). Seventeen variables were used to characterize habitat and five to characterize foraging behavior. Three PCA components accounted ...
متن کاملIncreasing trunk flexion transforms human leg function into that of birds despite different leg morphology.
Pronograde trunk orientation in small birds causes prominent intra-limb asymmetries in the leg function. As yet, it is not clear whether these asymmetries induced by the trunk reflect general constraints on the leg function regardless of the specific leg architecture or size of the species. To address this, we instructed 12 human volunteers to walk at a self-selected velocity with four postures...
متن کاملTHE CORRELATION BETWEEN SPERM MORPHOLOGY AND MOTILITY IN FERTILE AND INFERTILE MEN
The swim-up procedure was used to collect a sperm fraction with improved motility and normal morphology from fertile and infertile semen samples. The untreated and swim-up fractions were analyzed with the Hamilton-Thorn Motility Analyser. Comparisons were made to see the effect of this sperm selection technique on sperm motility and morphology. They were then examined by transmission elect...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Biological Journal of the Linnean Society
سال: 2003
ISSN: 0024-4066,1095-8312
DOI: 10.1046/j.1095-8312.2003.00200.x