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| 1 | Sperm allocation strategies in a sperm heteromorphic insect显示文摘Theories predict that in polyandrous species,the focal male should increase sperm allocation per mate in the presence of rivals to gain greater share of paternity,but in the presence of additional mates,he should reduce sperm allocation per mate to save sperm for insemination of more mates.However,empirical findings are often inconsistent and reasons behind are unclear.Furthermore,many studies use copulation duration as an estimate of the number of sperm transferred.Yet,empirical evidence for such assumption is largely lacking.Here,we used a sperm heteromorphic insect Ephestia kuehniella whose males produce two types of sperm,eupyrenes(fertile)and apyrenes(nonfertile),to test these postulations.We allowed focal males to detect chemical and acoustic but no tactile cues from rivals or additional mates both before and during mating and measured copulation duration and sperm allocation in successive copulations.We demonstrate that males transfer significantly more eupyrenes per mate in the presence of rivals and that the sperm allocation pattern persists in successive copulations under this condition.However,males do not adjust apyrene allocation in response to rivals probably because apyrenes play a relatively minor role in male reproductive success.Contrary to a previous study,focal males do not respond to additional mates most likely due to the lack of tactile cues in the present study.We reveal that sperm allocation is not a function of copulation duration in this insect for spermatophore formation and delivery occupy most of copulation duration and sperm transfer is complete near the end of copulation. | Kambiz ESFANDI Xiong Z.HE Qiao WANG | 2020 | Current Zoology2020，66，3： | 2 |
| 2 | A linear hueristic search algorithm显示文摘 | W.Zhang R.Yu Z.He | | 0，，： | 1 |
| 3 | The affection on the tissue lesions of difference frequency in dual-frequency high-intensity focused ultrasound显示文摘 | Pei Z.He Rong M.Xia Shi M.Duan | | 0，，： | 1 |
| 4 | Juvenile socio-sexual experience determines lifetime sperm expenditure and adult survival in a polygamous moth, Ephestiakuehniella显示文摘Male animals often adjust their sperm investment in response to sperm competition environment.To date,only a few studies have investigated how juvenile sociosexual settings affect sperm production before adulthood and sperm allocation during the first mating.Yet,it is unclear whether juvenile sociosexual experience(1)determines lifetime sperm production and allocation in any animal species;(2)alters the eupyrene:apyrene sperm ratio in lifetime ejaculates of any lepidopteran insects,and(3)influences lifetime ejaculation patterns,number of matings and adult longevity.Here we used a polygamous moth,Ephestia kuehniella,to address these questions.Upon male adult emergence from juveniles reared at different density and sex ratio,we paired each male with a virgin female daily until his death.We dissected each mated female to count the sperm transferred and recorded male longevity and lifetime number of matings.We demonstrate for the first time that males ejaculated significantly more eupyrenes and apyrenes in their lifetime after their young were exposed to juvenile rivals.Adult moths continued to produce eupyrene sperm,contradicting the previous predictions for lepidopterans.The eupyrene:apyrene ratio in the lifetime ejaculates remained unchanged in all treatments,suggesting that the sperm ratio is critical for reproductive success.Male juvenile exposure to other juveniles regardless of sex ratio caused significantly shorter adult longevity and faster decline in sperm ejaculation over successive matings.However,males from all treatments achieved similar number of matings in their lifetime.This study provides insight into adaptive resource allocation by males in response to juvenile sociosexual environment. | Junyan Liu Xiong Z.He Xia-Lin Zheng Yujing Zhang Qiao Wang | 2023 | Insect Science2023，30，1： | 1 |
| 5 | Politeness:myth and truth显示文摘 | Xie C Z.He D.Lin | | 0，，： | 1 |
| 6 | Type‐II secretion pathway structural gene xpsE, xylanase‐ and cellulase secretion and virulence in Xanthomonas oryzae pv. oryzae显示文摘 | Q. H.Sun J.Hu G. X.Huang C.Ge R. X.Fang C. Z.He | 2004 | Plant Pathology2004，，1： | 1 |
| 7 | Differentiation Imbalance of Th1/?Th17 in Peripheral Blood Mononuclear Cells Might Contribute to Pathogenesis of Hashimoto’s Thyroiditis显示文摘 | Y.Shi H.Wang Z.Su J.Chen Y.Xue S.Wang Y.Xue Z.He H.Yang C.Zhou F.Kong Y.Liu P.Yang L.Lu Q.Shao X.Huang H.Xu | 2010 | Scandinavian Journal of Immunology2010，，3： | 1 |
| 8 | 查看详情显示文摘 | D Z.He | | 0，，5： | 1 |
| 9 | A class of irregular LDPC codes with low error floor and low encoding complexity显示文摘 | Z.He P.Fortier S.Roy | | 0，，05： | 1 |
| 10 | 利用产量不稳定分析法预测页岩长期生产动态显示文摘对能源行业而言,页岩气藏已成为最重要的天然气资源之一。不过由于页岩本身很复杂,再加上到目前为止页岩气井的生产历史都还较短,使得对这类气藏产量的预测很困难,这一问题在页岩气井生产的早期尤其明显。为了能用于页岩气藏的储量估算和产量预测,我们对阿普斯双曲线方程进行了修改。尽管阿普斯方程因其简便和易操作而在大多数情形下用起来很便捷,但这种方法有自身的局限性[例如其假设条件是边界主导的流动(boundary-dominatedflow),而且井底流动压力、泄油面积、渗透率和表皮因子都是常数]。通过利用产量不稳定分析(RTA)理论对生产数据进行分析,可以建立解析模型,用于页岩气藏的产量和采收率的预测。由于基于RAT的模型不会受到阿普斯方程法的很多假设条件的限制,相较于利用修改后的阿普斯双曲线方程得到的产量递减曲线而言,这些模型得到的结果更精确。本文介绍了一个实用的RTA操作流程,用来确定发育多裂缝的水平页岩气井的关键生产动态参数。这是一种确定性的方法,可用于页岩气井长期生产动态的预测。该方法较阿普斯方程的一个最大的优点是可以在不同的经营策略下进行产量预测。利用这种方法,还可以对不同完井设计方案和作业情景(如压缩装置安装延迟)下的生产和经济影响进行研究。我们利用马塞勒斯页岩区带150多口井的资料对该方法进行了检验。结果表明,其预测结果与利用递减分析和油藏模拟得到的结果有很好的可比性。本文还介绍了这种方法在马塞勒斯页岩区带的应用实例,通过这些实例来说明其工作流程和结果。 | D.Gunaydin Z.He K.G.Brown 杨国丰(译) 白振瑞(校) | 2013 | 石油地质科技动态2013，，6： | 0 |
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