Vitellogenic cycles in laboratory-mainta
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Smalley, Katherine N. ;Nace, George W.
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Article
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1983
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John Wiley and Sons
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English
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As a part of studies on the reproduction of laboratory maintained frogs, wild-caught Rana pipiens were ovulated and maintained a t 22-27ยฐC for up to 18 months. Vitellogenic oocytes were periodically staged and counted, and a "maturity index" was calculated to assess the progress of the vitellogenic