Pre-hatching stages of the tailed frog, (Ascaphus truei) (Stejnegar) Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/ft848t676

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  • Description of anuran larvae with the use of staging tables is a common practice in the study of frog life-histories, but there has been no previous description or table of Ascaphus larvae. In comparing Ascaphus larvae to a simplified staging table for anurans it was found that these larvae vary considerably from those of other anurans. Five stages had to be eliminated (Fertilization, Grey Crescent, Neural Plate, Gill Circulation, and Cornea Transparent) and five new ones created (Deposition, Neural Groove, Eye Pigmentation, Body Pigmentation, and Hatching). The final result was a series of twenty-one stages, from Deposition through Hatching, through which the growth and development of the larvae could be traced and which will, it is hoped, facilitate discussion of larval Ascaphus in any further studies. Determination of tadpole food habits through stomach and intestinal content samples was largely unsuccessful.
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  • File scanned at 300 ppi using ScandAll PRO 1.8.1 on a Fi-6770A in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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  • description.provenance : Made available in DSpace on 2014-05-02T16:07:58Z (GMT). No. of bitstreams: 1 WernzJamesG1966.pdf: 690751 bytes, checksum: aafc102fc4df7f42e3ba07ab1d780e2b (MD5) Previous issue date: 1966-05-11
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