Size and age at first copulation and spawning of the apple snail, Pomacea canaliculata (Gastropoda: Ampullariidae)
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概要
- 論文の詳細を見る
The size and age at first copulation and spawning of the apple snail, Pomacea canaliculata, were determined at three food levels under laboratory conditions (14L:10D;25℃). Males fed at a low food level started copulation at smaller sizes than males at higher food levels. However, age at first copulation was similar among snails at all food levels. The food level appeared to affect the penis sheath length at maturity, although the difference did not reach a statistically significant level. Females fed at the low food level delayed both first copulation and spawning longer than those at higher food levels. Consequently, their sizes at first copulation and spawning were smaller. The albumen gland of poorly fed snails was smaller at first copulation but comparable at maturity. The adaptive significance of these patterns in sexual maturity and their possible implications for the integrated management of this snail are discussed.
- 日本応用動物昆虫学会の論文
- 2002-02-25
著者
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TSUCHIDA Koji
Laboratory of Entomology, Faculty of Agriculture, Gifu University
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WADA Takashi
National Agricultural Research Center for Kyushu Okinawa Region (KONARC)
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Wada T
National Agricultural Research Center For Kyushu Okinawa Region
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Wada Takashi
National Agricultural Res. Center For Kyushu Okinawa Region
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YUSA Yoichi
National Agricultural Research Center for Kyushu Okinawa Region (KONARC)
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Sakurai Hironori
Laboratory of Entomology, Faculty of Agriculture, Gifu University
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Estoy Gerardo
Laboratory of Entomology, Faculty of Agriculture, Gifu University
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Yusa Y
National Agricultural Research Center For Kyushu Okinawa Region:(present Address)nara Women's U
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Yusa Yoichi
National Agricultural Research Center For Kyushu Okinawa Region
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Tsuchida K
Division Of Radiological Protection And Biology National Institute Of Infectious Diseases
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Tsuchida Koji
Laboratory Of Ecological Entomology Faculty Of Applied Biological Sciences Gifu University
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Sakurai H
Laboratory Of Entomology Faculty Of Agriculture Gifu University
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Sakurai Hironori
Laboratory Of Applied Entomology And Nematology Faculty Of Agriculture Nagoya University:(present Ad
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Estoy Jr
Laboratory of Entomology, Faculty of Agriculture, Gifu University
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