共查询到18条相似文献，搜索用时 46 毫秒
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2022年6和7月,于云南省德宏傣族景颇族自治州盈江县和西双版纳傣族自治州勐腊县境内分别采集到蛇类2条和1条.经分子与形态学鉴定,德宏州2条蛇为白链蛇[Lycodon septentrionalis(Günther,1875)];而西双版纳的1条蛇与国内原鉴定为细白环蛇(L.subcinctus Boie,1827)的标本为同种,但与细白环蛇地模标本的分子遗传距离大,系统关系未解决,由于形态高度相似,暂定为细白环蛇(L.cf.subcinctus).其中,白链蛇的发现恢复了该种在云南省近期才被移除的分布记录,而细白环蛇的发现则佐证了早期文献中长期被忽视的存疑记录.本文讨论了白链蛇在云南的分布历史和细白环蛇的分类问题,并指出未来应加强云南省边境区域的生物多样性调查,以尽快摸清云南省两栖爬行动物本底资料. 相似文献
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猞猁(Lynxlynx)是内蒙古赛罕乌拉国家级自然保护区内的顶级捕食者,在维持该地区生态平衡和调节猎物数量上具有重要地位。分析猞猁粪便样品残留物不仅能明确其猎物构成,了解与同域分布其他捕食者的关系,还能为制定物种保护措施和栖息地管理策略提供科学参考。本研究在2006至2008年间利用样线法在该区域收集到35份猞猁粪便样品。通过相对出现频率法对粪样进行食性分析,发现猞猁的主要食物组成以蒙古兔(Lepus tolai,30.85%)和植物(28.72%)较多;年度(χ~2=18.696,P <0.001)和季节性(χ~2=74.695,P <0.001)食物构成均存在显著差异。结果表明,蒙古兔在猞猁的食物组成中占最重要地位;猞猁的食物构成与季节有关,寒冷季节捕食大型猎物,而温暖季节捕食的小型猎物更常见。 相似文献
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Anastasiya ANTONEVICH Sergey NAIDENKO 《动物学报》2008,54(1):12-19
研究了非自由生活的4窝11只猞猁幼仔的玩耍行为、亲和及入侵关系的变化.观察到36-57日龄幼仔的同胞打斗行为,这些打斗减少了这些幼仔之间游戏性接触的频次.这个"打斗期"与游戏行为和食性的变化同步发生.打斗后,幼仔游戏性接触的非对称性以及同胞之间的偏爱更加清楚.这些打斗导致了不同窝的幼仔之间等级结构的建立. 相似文献
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利用切片方法观察了猞猁Felislynx肝脏的组织结构,应用免疫组织化学方法检测了表皮生长因子(EGF)在肝脏中的表达。结果显示,肝脏外被覆一层结缔组织薄膜,肝小叶不规则且分界不清,肝板、肝血窦及狄氏间隙围绕中央静脉呈放射状排列,肝板由一排肝细胞构成。肝细胞呈圆形或多边形,多为单核,少数具双核,肝细胞间比较松散。肝血窦发达,内可见血细胞。EGF阳性反应主要定位于肝细胞质中,表明EGF可能参与细胞新陈代谢过程的调控。 相似文献
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【背景】扶桑绵粉蚧是一种危险的外来入侵害虫,自2008年在我国首次发现以来,其发生范围急剧扩大。但有关云南省扶桑绵粉蚧的发生情况缺乏系统的调查报道。【方法】2010年3月~2013年3月,对云南省16个州（市）72个区（市、县）的扶桑绵粉蚧的分布与危害情况进行了系统的调查,并对其天敌情况进行了初步调查。【结果】扶桑绵粉蚧在云南文山州富宁县,西双版纳州景洪市、勐海县,德宏州芒市,红河州元阳县、蒙自市,保山市隆阳区,丽江市华坪县,楚雄州永仁县,怒江州泸水县8个州（市）共10个市（县）有零星分布。其寄主植物共14科18属19种,包括园林观赏植物3种、经济作物1种、蔬菜作物2种、粮食作物1种、杂草11种,其中有12种植物在我国其他疫区未见报道;调查过程中发现其天敌3种。【结论与意义】扶桑绵粉蚧在云南省呈零星点状分布、疫区间受害情况有差异,未对经济作物造成严重损害。本研究可为云南省开展扶桑绵粉蚧的检疫防控提供参考。 相似文献
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2019年8月29日,在甘肃省张掖黑河湿地国家级自然保护区高台马尾湖湿地(99°37.6995′E,39°36.1352′N)开展鸟类多样性监测过程中,于10∶17发现1只体长约90 cm、体羽灰白色、飞羽和尾羽灰黑色、跗跖粉红色的大型涉禽鸟类,混群在红嘴鸥Larus ridibundus群中。 相似文献
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云南省是中国乃至世界兰科(Orchidaceae)植物最为丰富的地区之一,近年来随着调查研究工作的深入,发现了不少新属、新种、新记录属以及新记录种[1-10]。笔者近年来对云南南部和东南部植物区系进行调查,并通过标本鉴定和相关资料查阅,发现了4个云南新记录属和9个云南新记录种。其中, 相似文献
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1991年5月14和15日我们在云南省水富县太平乡铜锣坝自然保护区的阔叶林间的菜地边捕获到一条幼体,二条雌性成体,分别编号为R91514-l,R91515-2和R91515-3。标本保存在云南大学生命科学学院脊椎动物标本室,但R91515-3标本遗失。根据采集本的记录,这3条标本当时鉴定为游蛇科脊蛇属美姑脊蛇(Achalinus meiguensis Hu and Zhao,1966),系云南省蛇类新记录。现将两条标本情况报道如下。 相似文献
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2018年10月至2021年10月,在西藏墨脱县开展鸟类多样性调查期间记录到6种鸟类新分布,分别是大蓝仙鹟 (Cyornis magnirostris)、黄嘴角鸮 (Otus spilocephalus)、金胸雀鹛指名亚种 (Lioparus chrysotis chrysotis)、细嘴钩嘴鹛Sintextus亚种 (Pomatorhinus superciliaris intextus)、白喉姬鹟指名亚种 (Anthipes monileger monileger)、棕胸雅鹛assamense亚种 (Trichastoma tickelli assamense)。 相似文献
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在2010年春季北京西郊迁徙猛禽调查中,我们记录到未见于历史文献(蔡其侃,1987;高武等,1991;赵欣如,1999;自然之友,2001)和已发表的北京鸟类新分布记录报道(张正旺等,2003;刘阳等,2005;朱雷等,2011)的2种猛禽:松雀鹰(Accipiter virgatus)和蛇雕(Spilornis cheela).1 松雀鹰(Accipiter virgatus)2010年4月4日上午,于北京百望山森林公园南端山顶处拍摄到一只低空飞过的中型鹰类.其脸颊青灰色,喉白而具明显的黑色喉中线,区别于最常见的雀鹰(A.nisus);其个体大,颊下具黑色髭纹,前胸棕褐色且有纵纹,下体多棕褐色横斑,尾羽腹面具深色粗横纹,区别于较常见的日本松雀鹰(A.gularis);第三枚初级飞羽不显得特别长,初级飞羽端不黑,区别于赤腹鹰(A.soloensis);以上符合松雀鹰鉴别特征.松雀鹰在中国主要分布于中国西南、东南(包括台湾岛和海南岛)至中部;现在已知分布也包括中国蒙新区(蔡其侃,1987;郑光美,2011;约翰·马敬能等,2000). 相似文献
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The range of the Canada lynx (Lynx canadensis) has contracted substantially from its historical range. Using harvest records, we found that the southern range of the lynx in Ontario in the late 1940s collapsed and then, in a short period of time, increased to its largest extent in the mid‐1960s when the lynx range spread south of the boreal forest for a decade. After this expansion, the southern range contracted northwards beginning in the 1970s. Most recently, there has been a slight expansion between 2010 and 2017. We have attributed these dynamics on the southern range periphery to the fluctuation of the boreal lynx population in the core of the species'' range. In addition, connectivity to boreal lynx populations and snow depth seemed to condition whether the lynx expanded into an area. However, we did not find any evidence to suggest that these changes were due to anthropogenic landscape disturbances or competition. The boreal lynx population does not reach the peak abundance it once did, without which we would not expect to see large expansions of the southern lynx range as in the mid‐1960s. Our results suggest that the southern lynx range in Ontario has been driven by the magnitude of the boreal lynx population cycle, connectivity to the boreal forest, and snow conditions. Future persistence of lynx in the southern range periphery will likely depend on dynamics in the range core. 相似文献
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《Ecology and evolution》2022,12(8)
The ecology and evolution of reproductive timing and synchrony have been a topic of great interest in evolutionary ecology for decades. Originally motivated by questions related to behavioral and reproductive adaptation to environmental conditions, the topic has acquired new relevance in the face of climate change. However, there has been relatively little research on reproductive phenology in mammalian carnivores. The Eurasian lynx (Lynx lynx) occurs across the Eurasian continent, covering three of the four main climate regions of the world. Thus, their distribution includes a large variation in climatic conditions, making it an ideal species to explore reproductive phenology. Here, we used data on multiple reproductive events from 169 lynx females across Europe. Mean birth date was May 28 (April 23 to July 1), but was ~10 days later in northern Europe than in central and southern Europe. Birth dates were relatively synchronized across Europe, but more so in the north than in the south. Timing of birth was delayed by colder May temperatures. Severe and cold weather may affect neonatal survival via hypothermia and avoiding inclement weather early in the season may select against early births, especially at northern latitudes. Overall, only about half of the kittens born survived until onset of winter but whether kittens were born relatively late or early did not affect kitten survival. Lynx are strict seasonal breeders but still show a degree of flexibility to adapt the timing of birth to surrounding environmental conditions. We argue that lynx give birth later when exposed to colder spring temperatures and have more synchronized births when the window of favorable conditions for raising kittens is shorter. This suggests that lynx are well adapted to different environmental conditions, from dry and warm climates to alpine, boreal, and arctic climates. This variation in reproductive timing will be favorable in times of climate change, as organisms with high plasticity are more likely to adjust to new environmental conditions. 相似文献
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Polanc P Sindičić M Jelenčič M Gomerčić T Kos I Huber D 《Molecular ecology resources》2012,12(2):293-298
Historical samples, like tanned hides and trophy skulls, can be extremely important for genetic studies of endangered or elusive species. Selection of a sampling protocol that is likely to provide sufficient amount and quality of DNA with a minimum damage to the original specimen is often critical for a success of the study. We investigated microsatellite genotyping success of DNA isolated from three different types of Eurasian lynx historical samples. We analysed a total of 20 microsatellite loci in 106 historical samples from the endangered Dinaric lynx population, established from re-introduction of three pairs of lynx in 1973 from Slovakian Carpathians. Of the three tested sample types, turbinal bone and septum from the nasal cavity of the trophy skulls had the lowest percentage of samples successfully genotyped for all 20 microsatellite loci. Footpad samples, collected using a cork drill, exhibited better results in polymerase chain reaction amplification and genotyping than samples of footpad epidermis cut with a scalpel. We report simple and efficient sampling protocols, which could be widely applied for future studies utilizing historical samples. 相似文献
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Max Blake Darren Naish Greger Larson Charlotte L. King Geoff Nowell Manabu Sakamoto 《Historical Biology》2013,25(4):441-448
The alleged presence of non-native felid species in the British countryside – popularly, though in part erroneously, known as ‘British big cats’ or ‘alien big cats’ – is a long-standing and controversial topic, perennially of interest to both the mass media and amateur naturalists, and with little apparent acceptance from the technical zoological community. Nevertheless, a number of carcasses and captured live specimens have demonstrated the occasional presence within the region of escapees that potentially explain at least some ‘British big cat’ eyewitness records. We report here the existence of a probable Canada lynx, Lynx canadensis, shot in Newton Abbot, Devon, England, in or prior to 1903, and then accessioned to Bristol Museum and Art Gallery. The specimen (represented by extensive skeletal material and a stuffed taxidermy mount) is Bobcat-like in some respects but is identified as a Canada lynx on the basis of skeletal morphology with a high degree of support; attempts to extract DNA were unsuccessful. Stable strontium isotope analysis supports either a recent introduction from western Canada or long-term acclimation to the local area of Devon where it was collected. Although the specimen was undoubtedly an ‘alien’ (an escapee or release from a collection), it is significant as material evidence in demonstrating, for the first time, the presence of a wild-caught, feral, exotic felid dating to the early years of the twentieth century. 相似文献
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JOHN F. ORGAN JENNIFER H. VASHON JOHN E. MCDONALD JR. ADAM D. VASHON SHANNON M. CROWLEY WALTER J. JAKUBAS GEORGE J. MATULA JR. AMY L. MEEHAN 《The Journal of wildlife management》2008,72(7):1514-1517
Abstract Canada lynx (Lynx canadensis) were listed as threatened in the contiguous United States under the Endangered Species Act in March 2000. Little information on lynx ecology at the southern extent of their range was available at the time of listing, and no ecological studies had been conducted in the eastern USA. Between 1999 and 2004, we investigated habitat selection at natal dens in northern Maine to address questions on the importance of forest conditions to denning requirements. We compared within-stand characteristics of 26 den sites to general characteristics of the stands containing dens. We used logistic regression to identify components within stands that distinguished natal dens from the residual stand and used the information-theoretic approach to select models that best explained lynx den-site selection. The top-ranked model had 2 variables: tip-up mounds of blown-down trees and visual obscurity at 5 m from the den (wi = 0.92). Within-stand structure was useful for predicting lynx den-site selection in managed forests in Maine and suitable denning habitat did not appear to be limiting. 相似文献