青海湖旅游区生命周期研究

立足青海湖旅游区实际,在分析影响旅游区生命周期的诸因素基础上,提出了延长该区旅游生命周期的具体措施。     

害草薇甘菊生防因子——安婀珍蝶的自然种群生命表研究

室外设立隔离网笼，在自然气候条件下，饲养、释放薇甘菊重要生防因子——安婀珍蝶，研究了安婀珍蝶野外释放后对广东地区环境的适应能力；利用庞雄飞作用因子组配的生命表方法，组建安婀珍蝶自然种群生命表，量化分析评价各因子对安婀珍蝶的影响。结果表明：释放安婀珍蝶两代的自然种群趋势指数分别为0．0872和0．0939，都非常低，安婀珍蝶野外增殖能力较差。第一代和第二代中“捕食与其他”的控制作用指数分别为190．0191和84．8973，均高于其他因子的控制作用，“捕食与其他”为影响安婀珍蝶生长发育的重要因子。综合上述结果认为，需通过大量饲养人工释放、补充幼虫数量的方法，逐步提高安婀珍蝶在野外建立自然种群的能力。     

轮纹异痂蝗生物学特性初步研究

研究结果表明:轮纹异痂蝗在通辽1年发生1代,以卵在土中越冬。越冬卵于翌年5月上中旬孵化,蝗蝻共4龄,全蝻期26～32 d,6月上、中旬为羽化盛期。7月上、中旬为产卵盛期,卵产在土中深4～6 cm处。成虫可活到9月中旬。轮纹异痂蝗喜食菊科和百合科等幼嫩多汁的植物,食量为每头每日食鲜草1.05 g,每666.7 m²可损失鲜草10.25～12.75 kg。     

松突圆蚧种群生命表与花角蚜小蜂的寄生作用的研究

通过对不同时期放蜂的放蜂区和不放蜂的对照区建松圆蚧自然种群生命表２４个,并对这些生命表采用相关回归分析,指出影响放蜂区松突圆蚧种群数量变动的关键因子是松突圆蚧花角蚜小蜂的寄生。     

美洲斑潜蝇自然种群生命表及飞行能力的研究

美洲斑潜蝇ＬｉｒｉｏｍｙｚａｓａｔｉｖａｅＢｒａｎｃｈ．田间自然种群中,幼虫期的死亡率最高,１、２、３龄幼虫平均死亡率分别为４８．１４％、５０．８６％、７８．９７％,幼虫期被寄生蜂寄生的概率随龄期的增大而增高,从１龄的１．４４％上升到３龄的６０．８８％。应用微型昆虫飞行磨（Ｆｌｉｓｈｔｍｉｌｌ）计算机联机装置对不同日龄成虫的飞行能力进行了测试,结果表明：雌虫飞行能力随日龄的增大而增强,３日龄最大连续飞行的时间为８．８３分钟,距离为２７２．９３ｍ。雄虫以２日龄成虫飞行能力最强,最长的一次连续飞行时间可达２５．００分钟,距离为８８２．８８ｍ。     

花椒波瘿蚊研究初报

简述了花椒波瘿蚊的形态特征、危害情况、生活史、主要生活习性、主要天敌及防治措施     

河西走廊荒漠草地阔胫萤叶甲生活习性及危害

通过对阔胫萤叶甲Pallasiola absinthii害虫生活习性及危害的研究,发现在甘肃河西半荒漠草原上,阔胫萤叶甲1年发生1代,以卵在草丛基部土层中越冬,主要以驴驴蒿Artemisia dalailamae为食,幼虫期是其主要危害期.阔胫萤叶甲的幼虫具有极强的耐饥饿能力,在不食状态下能存活27d之久;水淹3h后仍能复活;不耐冻,在幼虫孵化出土后遇霜冻气候,对其发生蔓延有抑制作用.适于防治阔胫萤叶甲虫害的农药是4.5%氯氰菊脂和水胺硫磷,其最佳施药量为900和750mL/hm2.     

浅谈疲劳与保健

近年来,越来越多的人因为对更高的物质生活追求而承受着巨大的工作压力,从而忽视了健康.大多数人都处于亚健康的状态.从日常生活出发,分析了健康对人类的重要性,以期有助于处于亚健康的人群.     

Transnationalism through the life course: Hong Kong immigrants in Canada

Abstract: Transnationalism needs to be understood as a set of practices fashioned through the life course as well as in relation to contextual factors that include state policy and experiences of discrimination that affect entry to the labour force. The paradox of transnationalism is that families make strategic decisions to separate in order to maintain family unity and to advance the welfare of children. Emigrants from Hong Kong to Canada in the latter decades of the twentieth century were motivated by concern for family welfare and the quality of education in Canada. Yet economic livelihood prospects remained greater in Hong Kong than in Canada, prompting many families to become transnational ‘astronaut’ families with one or more members working in Hong Kong. Migration decisions tend to occur around key points of life‐course transition involving entry to and graduation from education, and entry to and exit from the labour force. Transnational practices are complex and multigenerational, involving different patterns for young adults, those in their middle years and the elderly.     

Life-history variation in relation to nest site abundance in males of the freshwater goby Tridentiger brevispinis

Abstract –  Age at maturity in males of the freshwater goby Tridentiger brevispinis , a species with exclusive paternal care, was investigated in two populations in Lake Biwa, Japan, that differed markedly in nest site abundance. At Ohmi-maiko, where nest sites were scarce, most males matured at age 3, and mean body size of males guarding eggs in nests was larger than that of males sampled randomly (including both guarding and nonguarding males) in the population. Conversely, at Minamihama, where nest sites were abundant, many males matured at age 1, and there was no difference in body size between guarding males and males collected randomly. The slope of regression lines between body size of the guarding male and the number of eggs in his nest was greater in Ohmi-maiko than in Minamihama. These results suggest that the shortage of nest sites enhances reproductive success in larger males, probably through male–male competition for nest sites and female mate choice for larger males. I conclude that in nest spawners, the availability of nest sites should strongly affect life-history traits of males through sexual selection.