Sexual maturity of the apple snail, Ampullarius insularus.
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چکیده
منابع مشابه
Apple Maturity Discrimination and Position
The most crucial problem of apple harvesting robot is to get the exact location and the maturity degree of the target. A system of apple maturity discrimination and positioning based on the multi-spectral technology and laser triangulation ranging principle is researched. Signal transmission, signal reception, signal processing, the CPU processing and several PC components are involved in the s...
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Dr. RAYMOND PEARL (1912) was the first worker to suggest that sexlinked factors were involved in the inheritance of fecundity. PEARL used as a measure of fecundity the eggs produced during the winter period. He proposed that two major dominant factors were responsible for high egg production, one of which resided in the sex chromosome. GOODALE (1919) and HURST (1921) each failed to confirm the ...
متن کاملDevelopment of a penis from the vestigial penis in the female apple snail, Pomacea canaliculata.
In the apple snail (Pomacea canaliculata), females have an undifferentiated mass of tissue near the anus. Although this mass is called the vestigial penis, there are no signs of a hermaphroditic gonad or any structure that represents a transition from one sex to the other. Based on considerations of the steroid hormone theory of reproduction and in view of disruption of endocrine systems in mol...
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ژورنال
عنوان ژورنال: Kyushu Plant Protection Research
سال: 1986
ISSN: 0385-6410,1884-0035
DOI: 10.4241/kyubyochu.32.101