维普中文期刊产品整合服务
39篇 您的检索式:作者名="DAHMER"
    题名 作者 年代 出处 被引量
1雷州半岛红树林湿地鸟类多样性显示文摘从2000年5月-2003年11月,调查了雷州半岛红树林湿地鸟类。共记录鸟类133种,水鸟和迁徙鸟分别占总记录鸟类数量的81.7%和70.4%。分别有9种、2种、16种和12种鸟被列为中国红皮书保护种、IUCN保护种、CITES保护种和中国国家Ⅱ级保护种;还有63种被列为中日候鸟协定保护种、32种被列为中澳候鸟协定保护种。不同调查地点,鸟类的种类和数量相差较大,高桥鸟类最丰富,记录到83种鸟;五里鸟类种类最少,仅记录到40种鸟,各地鸟类种的相似性很低。环颈鸻(Charadrius alexandrinus)、白腰杓鹬(Nume-nius arquata)和红嘴鸥(Larus ridibundus)在雷州半岛的种群数量达到国际重要湿地的标准。雷州半岛鸟类种的丰度和多度季节变化明显,冬季种类多、数量丰富,夏季种类少、数量贫乏。冬季和夏季总的鸟类数量(P=0.043)和水鸟数量(P=0.001)差异明显。保护整个沿海红树林湿地是保护雷州半岛红树林湿地鸟类多样性的关键。邹发生 杨琼芳 蔡俊钦 John Howes Tom Dahmer 张苇 2008生态学杂志2008,27,3:22
2Morphometric discrimination of wild from farmed Dybowski’s frog (Rana dybowskii) based on hindlimb length显示文摘Commercial farming of anuran species that are declining in the wild raises a need to discriminate wild from farmed frogs.We hypothesized wild frogs might have extended hindlimbs due to greater frequency or intensity of jumping relative to farmed frogs,highlighting a morphometric approach to discrimination of wild from farmed frogs using hindlimb length.In the present study,Dybowski's frog(Rana dybowskii) was used to test this hypothesis.We measured body mass(Mb) and hindlimb length(Lh) of 2-year old farmed frogs and wild frogs aged 2 to 5 years.Dybowski's frog demonstrated significant dimorphism in Mb and Lh.Mb was significantly greater among farmed 2-year old frogs in both sexes(p=0.000),while only among females was Lh significantly greater for wild frogs(p=0.000).Lh/Mb was used as an index for origin discrimination to eliminate the influence of Mb due to variation of husbandry conditions among farms.Mean Lh/Mb for farmed frogs was significantly lower than for wild frogs(p=0.000) in the 2-year old age class.Discrimination correctly classified 84.4% of farmed and 96.3% of wild male frogs.Among females,92.9% of farmed frogs and 90.1% wild frogs were correctly classified.The overall correctness of classification was 92.1% and 90.8% for males and females,respectively.However,Lh/Mb revealed variation with age,resulting in reduced discriminative power for frogs ≥3 years old.We introduced a coefficient Ce to adjust the Lh/Mb of frogs ≥3 years to the level equivalent to 2-year frogs.The adjustment achieved 89.5% for overall correctness of origin for wild males and 92.4% for wild females ≥3 years old.These results show that Lh/Mb is an effective index to discriminate wild from farmed Dybowski's frog.Since the physical demands of jumping are common among anurans,this index is also potentially applicable to other anuran species.XIA Rui HUANG Xiao-ming YANG Shu-hui XU Yan-chun Ying Lu Thomas D. Dahmer 2011Journal of Forestry Research2011,22,2:3
3Simultaneous polyandry and heteropaternity in tiger(Panthera tigris altaica):Implications for conservation of genetic diversity in captive populations of felids显示文摘Male tigers(Panthera tigris altaica) in captivity copulate alternatively with an estrous female,suggesting a potential for heteropaternity as an effective reproductive strategy to maximize genetic diversity of offspring.We analyzed microsatellites to test and compare the genetic output of multiple male mating(simultaneous polyandry) and single male mating(monogamy) with a female in a captive population.Simultaneous polyandry resulted in heteropaternity in 66.7% observed litters.No significant differences between parental populations and between offspring populations were detected in the number of alleles(A),expected heterozygosity(H e),number of effective alleles(N e) per locus and standard individual heterozygosity(SH)(P>0.05 for all 4 indexes).Comparisons showed no significant reduction of A,H o,H e and SH from parental population to offspring population for the two mating modes(P>0.05) except for SH in polyandrous families(P=0.029).However,such reduction was equivalent to single mating families when the influence of relatedness was eliminated using effective SH(E SH)(P>0.05).These results highlight an alternative strategy for managing captive populations of tiger and other wild felids in which animals are combined at one location allowing for copulation by multiple males to encourage heteropaternity in favor of maintained genetic diversity among offspring.LIU Dan MA Yue LI HuiYi XU YanChun ZHANG Yan DAHMER Thomas BAI SuYing WANG Jian 2013Chinese Science Bulletin2013,58,17:3
4MAPK and JAK-STAT signaling pathways are involved in the oxidative stress-induced decrease in expression of surfactant protein genes 显示文摘Park SK Dahmer MK Quasney MW 2012Cell Physiol Biochem2012,30,2:1
5Comparative protein accumulation patterns in soybean somatic and zygotic embryos显示文摘Mark L. Dahmer David F. Hildebrand Glenn B. Collins 1992In Vitro – Plant1992,,2:1
6The influence of genetic variation in surfactant protein B on severe lung injury in African American children显示文摘Dahmer MK O'cain P Patwari PP 2011Crit Care Med2011,39,5:1
7Genetic polymor- phisms in sepsis显示文摘Dahmer MK Randolph A Vitali S 2005Pediatr Crit Care Med2005,6,3:1
8Analysis of airfoil trailing edge heat transfer and its significance in thermal-mechanical design and durability显示文摘CUNHA F J DAHMER F T CHYU M K 0,,04:1
9Health effects of hawthorn显示文摘Dahmer S Scott E 0,,04:1
10Glucosamine显示文摘Dahmer S Schiller R M 2008American Family Physician2008,78,4:1
11MAPK and JAK-STAT signaling pathways are involved in the oxidative stress-induced decrease in expression of surfactant protein genes显示文摘Park SK Dahmer MK Quasney MW 2012Cell Physiol Biochem2012,30,2:1
12The influence of genetic varia- tion in surfactant protein B on se'ere lung injury in African American children 显示文摘Dahmer MK O'Cain P Patwari PF' 2011Crit Care Med2011,39,5:1
13lmidazolinonetolerant Crops; History, Current Status and Future显示文摘TAN S EVANS R R DAHMER M L 2005Pest Manag Sci2005,61,:1
14Glucosamine 显示文摘Dahmer S Schiller RM 2008Am Faro Physician2008,78,4:1
15Imidazolinone-tolerant crops:history,current status and future显示文摘Tan S Evans RR Dahmer ML 0,,03:1
16Association be- tween surfaetant protein B + 1580 polyn~orphism and the risk of re- spiratory failure in adults with community-acquired pneumonia 显示文摘Quasney MW Waterer GW Dahmer MK 2004Crit CareMed2004,32,:1
17A rapid screening technique for determining the lipid composition of soybean seeds 显示文摘Dahmer ML Fleming PD Collins GB 1989J Am Oil Chem Soc1989,66,4:1
18The effects of benthos and wetland area on shorebird abundance and species richness in coastal mangrove wetlands of Leizhou Peninsula,China显示文摘Zou Fashen Zhang Hanhua Dahmer T 0,,:1
19Imidazolinone-tolerant crops:history,current status and future显示文摘Tan S Evans R R Dahmer M L 2005Pest Manag Sci2005,61,:1
20Imidazolinone-tolerant crops:history,current status and future显示文摘Tan S Evans R R Dahmer M L 2005Pest Management Science2005,61,:1
返回顶部 每页显示:
共2页 首页 上一页 第1页 下一页 末页 /2 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费