Extraocular Control of Photorefractoriness in American Tree Sparrows (Spizella Arborea)1
نویسندگان
چکیده
منابع مشابه
Ovarian Growth in Tree Sparrows (spizella Arborea)
T•E gonadal responses of several species of birds exposed to stimulatory daily photoperiods of constant duration conform in that an initial rectilinear relationship exists between the logarithm of testicular weight and time on long days. They conform further in that the rate of photoinduced testicular growth, as determined from the rectilinear relationship, is a function of daylength. These and...
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15 صفحه اولA new genus for the American Tree Sparrow (Aves: Passeriformes: Passerellidae).
The genus Spizella (Bonaparte) contains seven species of North American sparrows in the recently resurrected family Passerellidae (Bock 1994; Barker et al. 2013), formerly placed in the Emberizidae, and includes a few of the region's most common and familiar bird species. Spizella sparrows occupy more or less open habitats; most species are at least partially migratory and form small flocks whe...
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چکیده ندارد.
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چکیده این پایان نامه به بررسی اثر سیم پیچ مغناطیسی و کاوه یِ خوشه گر با بسامد رادیویی بر هاله و بیرونگراییِ باریکه هایِ پیوسته و خوشه ایِ ذرات باردار در شتابدهنده های خطیِ یونی، پروتونی با جریان بالا می پردازد و راه حل هایی برای بهینه نگهداشتن این کمیتها ارایه می دهد. بیرونگرایی یکی از کمیتهای اساسی باریکه هایِ ذرات باردار در شتابدهنده ها است که تاثیر قابل توجهی بر قیمت، هزینه و کاراییِ هر شتابدهند...
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ژورنال
عنوان ژورنال: Biology of Reproduction
سال: 1989
ISSN: 0006-3363,1529-7268
DOI: 10.1095/biolreprod41.1.111