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Quantitative impact of mating duration on reproduction and offspring sex ratio of Phytoseiulus persimilis(Acari: Phytoseiidae) 被引量:2
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作者 Lü Jia-le ZHANG Bao-he +2 位作者 JIANG Xiao-huan WANG En-dong XU Xue-nong 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2019年第4期884-892,共9页
Phytoseiulus persimilis is an important biological control agent, commercially produced worldwide. To increase understandings of its reproduction, herein we provided quantitative descriptions of the inflation and defl... Phytoseiulus persimilis is an important biological control agent, commercially produced worldwide. To increase understandings of its reproduction, herein we provided quantitative descriptions of the inflation and deflation of its spermathecae as a function of time and copulation duration, and the quantitative impact of copulation termination on volume of spermatheca vesicle, fecundity, and offspring sex ratio. After mating started, at least one spermatheca started to inflate immediately, but no egg was produced until spermatheca volume reached 1 021 μm3. Beyond this size, cumulative fecundity was linearly correlated with vesicle volume. Producing one egg required 36 μm3 volume increase of the vesicle. Each spermatheca vesicle reached its peak size at the end of mating duration(ca. 2.38 h after mating started), and started to shrink immediately. In 24 h, ca. 71% individuals had one completely shriveled spermatheca, while in 72 h all individuals had at least one shriveled spermatheca. The estimated maximum cumulative fecundity per female after a single mating is(69.4±7.7) eggs. No significant impact of mating termination on offspring sex ratio was observed after mating duration reached 60 min, while higher proportion of male offspring was observed when mating duration is 15 or 30 min. This study is the first step to investigate possible male impact on offspring sex ratio in P. persimilis. Our results suggested the number of sperms received during mating be a restriction factor of P. persimilis offspring sex ratio regulation. 展开更多
关键词 PREDATORY MITE pseudoarrhe no toky SPERMATHECAE fecun dity sex determi NATION
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Toki Rambus登场
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《ComputerDIY.电脑DIY》 2001年第9期29-29,共1页
关键词 Ramus 内存 Toki 计算机
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CJFA President Song Jian Attends Northeast Asia Economic Conference
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作者 Cai Hong 《Voice of Friendship》 2004年第3期8-8,共1页
Invited by the Japanese Niigata Prefectural Government and the Japan Economic Research Institute for Northeast Asia, Song Jian, president of the China-Japan Friendship Association (CJFA), attended the Northeast Asia E... Invited by the Japanese Niigata Prefectural Government and the Japan Economic Research Institute for Northeast Asia, Song Jian, president of the China-Japan Friendship Association (CJFA), attended the Northeast Asia Economic Conference in Niigata and visited Tokyo and Akita Prefecture from January 31 to February 7, 2004. 展开更多
关键词 NORTHEAST visited JAPANESE PRESIDENT attended toky
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潮头堡
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作者 Bright 《体育健康知识画刊》 2008年第7期94-95,共2页
CLOT Rainbow C & Apostles Tee最近CLOT和HEAD PORTER联手推出的单品都取得了不错的口碑,这次趁热打铁推出了彩虹&使徒TEE。
关键词 NEIGHBORHOOD 小腿外侧 洗水 二段 家居产品 包袋 皮特 WINTER 不对称 toky
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Japanese Toraf to Set up Polysulfide Rubber Plant at Cangzhou
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作者 Zhang Jing,Cangzhou Coastal-port Chemical Industry Zone 《China Chemical Reporter》 2008年第1期9-9,共4页
An agreement was signed on December 19th,2007 at Tokyo between Japanese Toray Fine Chemicals Co.,Ltd.(Toray)and CangzhouCoastal-port Chemical Industry Zone(CCCIZ),in Hebei province of northern China.According to.the a... An agreement was signed on December 19th,2007 at Tokyo between Japanese Toray Fine Chemicals Co.,Ltd.(Toray)and CangzhouCoastal-port Chemical Industry Zone(CCCIZ),in Hebei province of northern China.According to.the agreement,Toray Fine Chemicals Co.,Ltd.will purchase some 2. 展开更多
关键词 JAPANESE Hebei SIGNED rubber PURCHASE SEALANT toky
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