天津八仙山国家级自然保护区野生狍集群模式和时空活动规律

2017年6月—2019年3月,以天津八仙山国家级自然保护区为研究地点,首次应用红外相机技术综合关注野生狍Capreolus pygargus的集群模式和时空活动规律.结果发现,狍表现出5种集群模式,以单雄和单雌模式为主;各种集群模式的出现频次呈显著的季节差异(χ2=10.867,df=3,P=0.012)、温度区段差...     

黑龙江东部马鹿集群行为的初步观察

本文根据野外观察到的112群马鹿,初步研究了马鹿的集群行为。野生鹿群大小范围为2—19头,平均群内头数为3.55,鹿群在各季节具有明显的变化。通过对3种类型鹿群的观察分析,发现母仔群是主要的鹿群类型,该类型在各季节中所占比例较大(26％—53％),且在产仔期和哺乳期群内分化较高。而在妊娠期群内分化较低。公鹿群在全年比较稳定,混合群在各季节变化较大,每群平均数4.58头,为3种鹿群类型中最大者。     

雉鸡的冬季集群行为观察

有关雉鸡 (Ｐｈａｓｉａｕｎｓｃｏｌｃｈｉｃｕｓ)冬季集群行为研究 ,Ｗｅｓｔｅｒｋｏｕ (1 956)在新西兰发现大多数雉鸡不集群 ;而Ｒｉｄｌｅｙ (1 983 )则认为雉鸡不仅在冬季集群 ,且群体是由同一性别的个体所组成。王建平等[3]报道 ,在山西庞泉沟国家级自然保护区观察 ,雉鸡在冬季有明显的集群行为 ,且有性别隔离现象。于1 997～ 1 999年的 1 0～ 1 2月和 1 998～ 2 0 0 0年的 1～ 2月 ,我们在山西历山国家级自然保护区对雉鸡冬季的集群行为进行了研究 ,现将有关资料报告如下。1　工作区自然概况历山国家级自然保护区位于本省中条山东…     

天山盘羊集群行为的研究

除了孤盘羊外,盘羊集群可分为４类,即雌性群,雄性群、混合群和家庭群。雌性群和雄性群是盘羊的基本群。其余为季节性群。根据３－１１月野外１８２群,２０４０只盘羊统计。盘羊全年群平均１１．２（２－５６）只,雌性群１２．８（２－５６）只,雄性群６．６（２－１６）只和混合群１８．１（６－４３）只。同时对盘羊群体的季节性变动进行了研究。盘羊集群与其自身的生物学特性、环境的水热分布和人类的竞争有关,因此不同地区     

从分子水平探讨中国东北狍的分类地位

国内外对中国狍的分类地位意见不一。本测定了来自中国东北完达山、小兴安岭、大兴安岭、三江和吉林向海等5个地区的15只野生狍的线粒体DNA Cyt 6基因(415 bp)和来自完达山、三江和吉林向海等3个地区的6只野生狍的线粒体控制区部分序列(764 bp),分析了中国东北狍与西伯利亚狍、欧洲狍的系统进化关系,得出中国东北狍与欧洲狍之间mtDNA Cyt 6和mtDNA控制区序列差异平均值分别为4．12%,和4．89％,达到了鹿类动物的种间差异水平;而与西伯利亚狍的mtDNA Cyt 6和mtDNA控制区序列差异平均值仅为1.61％和2．44％,只达到亚种水平。结合形态学的差异,本认为中国东北的狍与欧洲狍为两个独立的物种,与西伯利亚狍为同种。并提出中国东北狍与欧洲狍的分歧时间约在200万年前,与西伯利亚狍的分歧时间约在80万年前。     

特殊天气对麻雀集群行为的影响

采用直接观察法对麻雀在特殊气候条件下傍晚的集群行为进行研究,结果表明强度较小的降水或降雪对麻雀集群时群体大小影响较小,而在大的降水、降雪或大风天气下,麻雀没有傍晚集群行为。在上述特殊天气下,麻雀集群时间均有所提前,集群时光照强度较正常天气下有所降低,表明光照强度可能是影响麻雀集群时间提前的主要生态因子。     

越冬期勺鸡集群行为的观察

观察了2001～2004年冬季分布于历山保护区的勺鸡的集群行为行。野外共观察120次,见到勺鸡1034只,其中95．3％的个体营集群生活,环境的异质性和天敌的捕食压力可能是导致勺鸡等雉类冬季集群的重要因素。     

越冬期丹顶鹤集群行为研究

江苏盐城国家级自然保护区是当今世界野生丹顶鹤最大的集群越冬地,它每年１０月中下旬陆续迁来越冬,翌年２月下旬陆续迁出,３月上中旬迁徙结束,越冬期４￣５个月。经观察研究,越冬项丹顶鹤集群行为主要有迁徙集群、夜栖集群、低气温集群和其它集群。气候条件与其密切相关,其它自然条件与环境因素也能对其产生直接的影响。     

圈养条件下狍繁殖行为的研究

本试验研究了狍(东北亚种)在人工饲养条件下的繁殖行为。研究结果表明:(1)在交配季节,雄狍具有卷唇嗅闻、扒土等行为;雄狍与雌狍的卧息、冲突行为差异显著,尾阴探究差异极显著。(2)妊娠雌狍选择隐蔽处分娩产仔。(3)在临产前,雌狍有临产表现,采取侧卧分娩姿势,仔狍娩出后,舔食仔狍的胎水和胎膜。     

春季和夏初黄羊的集群行为

本文对春季和夏初在野外观察到的６３７群黄羊（Ｐｒｏｃａｐｒａｇｕｔｔｕｒｏｓａ）的集群行为进行了研究。给出了春季和夏初各种类型黄羊群平均大小及其方差,并对黄羊群的平均大小、所占比例及其稳定性也进行了比较分析。结果表明,春季和夏初羊群的平均大小存在着显著差异（Ｆ＝３．０９＞Ｆ０．０５）,春季羊群（２～４１２只）较夏初羊群（２～１０３只）变动范围要大。春季羊群主要是混合群（６３．１４％）,夏初羊群主要是雌性群（６０．７３％）。在春季和夏初两个季节,雄性群比例皆最低,分别为７．４５％和７．５９％。较大的集群往往是混合群,春季平均大小为３８．９５只,夏初为２９．１３只。而雄性群和雌性群集群规模皆较小。在春季,雌性群平均大小为１１．３５只,雄性群平均大小为８．８４只。在夏初,雌性群平均大小为４．８８只,雄性群平均大小为９．６３只。混合群的社群组织最为松散,处于不稳定状态,雄性群最为稳定,羊群波动最小。产仔期、食物丰富度及羊群类型是影响黄羊春季和夏初集群变化的重要因素。     

Hypoderma actaeon: an emerging myiasis in roe deer (Capreolus capreolus)

Subcutaneous larvae of Hypoderma spp. (Diptera: Oestridae) were detected in the dorsal region in 10 roe deer, Capreolus capreolus (Artiodactyla: Cervidae), hunted in central Spain between January and March 2016. All larvae were found in the inner side of the hide during the skinning of the animals. The study of the morphological features of eight larvae of different stages collected from two animals allowed the identification of Hypoderma actaeon Brauer. The small size (4–5 mm) of some of the first instars suggests that the internal lifecycle of H. actaeon may be exclusively subcutaneous. This is the first confirmation of H. actaeon in roe deer; however, further studies to assess the spread of the parasite and to follow the evolution of this myiasis in roe deer are needed.     

Temporal shifts of DNA‐microsatellite allele profiles in roe deer (Capreolus capreolus L.) within three decades

DNA‐microsatellite polymorphism (four loci) was studied in 56 male roe deer (Capreolus capreolus) from a 900‐ha hunting territory in the Vosges du Nord Mountains (France), culled over 34 years (1956–1990). Changed allele frequencies at two loci within this period, and increased allelic diversity, were traced to a phase of reduced population density and subsequent immigration. Decadic population samples collected within 900‐ha were distinguished by higher genetic variability measures than were certain geographical samples across Central Europe (4–900 km). On average, the decadic cohorts were distinguished by a gene diversity index of G_ST = 0.0286, and a genetic distance of D = 0.0938, which reflect 54% (G_ST) and 69% (D) of the respective geographic (350 km) differentiation indices of roe deer in Central Europe. The importance of demography and population ecology effects for microevolution in a large mammal is demonstrated, as is the risk of artefact by composing population samples of deer over several years. Population genetic screening should cover various demes of roe deer from the same general region, and be based on many unlinked polymorphic loci, to minimize the distorting effects of genetic dynamics at the small spatial scale.     

Quaternary history of the European roe deer Capreolus capreolus

• 1 The European roe deer Capreolus capreolus is a typical faunal element of the Holocene. It was already present in Europe at least 600 000 years ago and it has been known from both glacial and interglacial phases since then. With nearly 3000 fossil and subfossil records, it is one of the most frequent mammals in the Late Quaternary.
• 2 During the Middle and Late Weichselian Pleniglacial, the distribution of the roe deer was not restricted to the Mediterranean peninsulas but repeatedly reached regions of central Europe. In contrast to that, roe deer records from the Last Glacial Maximum (LGM, 21.0–14.5 ka ¹⁴C BP) are largely confined to the Mediterranean peninsulas – with the exception of south‐western France and the surroundings of the Carpathians where several records attest to its occurrence during the LGM.
• 3 During the Greenland Interstadial 1 (12.5–10.8 ka ¹⁴C BP), the species' distribution extended further north and the roe deer appeared north of the Alps and reached regions of central Germany. This seems to be correlated with the abrupt change to more favourable environmental conditions during this period. It is very likely that the roe deer disappeared north of the Alps during the Younger Dryas cooling (10.8–10.0 ka¹⁴C BP). The northern regions of the central European lowlands were recolonized by roe deer during the late Preboreal 9.7–9.5 ka ¹⁴C BP for the first time since the Weichselian Glacial.
• 4 The combined pattern of genetic data and fossil records of European roe deer suggests several regions in the Iberian peninsula, southern France, Italy and the Balkans as well as in the Carpathians and/or eastern Europe as glacial refugia. It further suggests that C. capreolus might have recolonized most parts of central‐northern Europe out of one or more eastern European (not Balkan) and/or Carpathian refugia. This recolonization wave might have blocked immigration from the traditional Mediterranean areas.

     

Predation has a greater impact in less productive environments: variation in roe deer, Capreolus capreolus, population density across Europe

Aim We aimed to describe the large‐scale patterns in population density of roe deer Caprelous capreolus in Europe and to determine the factors shaping variation in their abundance. Location Europe. Methods We collated data on roe deer population density from 72 localities spanning 25° latitude and 48° longitude and analysed them in relation to a range of environmental factors: vegetation productivity (approximated by the fraction of photosynthetically active radiation) and forest cover as proxies for food supply, winter severity, summer drought and presence or absence of large predators (wolf, Canis lupus, and Eurasian lynx, Lynx lynx), hunter harvest and a competitor (red deer, Cervus elaphus). Results Roe deer abundance increased with the overall productivity of vegetation cover and with lower forest cover (sparser forest cover means that a higher proportion of overall plant productivity is allocated to ground vegetation and thus is available to roe deer). The effect of large predators was relatively weak in highly productive environments and in regions with mild climate, but increased markedly in regions with low vegetation productivity and harsh winters. Other potentially limiting factors (hunting, summer drought and competition with red deer) had no significant impact on roe deer abundance. Main conclusions The analyses revealed the combined effect of bottom‐up and top‐down control on roe deer: on a biogeographical scale, population abundance of roe deer has been shaped by food‐related factors and large predators, with additive effects of the two species of predators. The results have implications for management of roe deer populations in Europe. First, an increase in roe deer abundance can be expected as environmental productivity increases due to climate change. Secondly, recovery plans for large carnivores should take environmental productivity and winter severity into account when predicting their impact on prey.     

Phylogeography of roe deer (Capreolus capreolus) populations: the effects of historical genetic subdivisions and recent nonequilibrium dynamics

We sequenced 704 mitochondrial DNA (mtDNA) control-region nucleotides and genotyped 11 autosomal microsatellites (STR) in 617 European roe deer (Capreolus capreolus) samples, aiming to infer the species' phylogeographical structure. The mtDNA sequences were split in three distinct haplogroups, respectively, named: Clade West, sampled mainly in Iberia; Clade East, sampled mainly in Greece and in the Balkans; and Clade Central, which was widespread throughout Europe, including the eastern countries and Iberia, but not Greece. These clades might have originated in distinct Iberian and Balkanic refuges during the penultimate or the last glaciations. Clades East and West contributed little to the current postglacial mtDNA diversity in central Europe, which apparently was recolonized mainly by haplotypes belonging to Clade Central. A unique subclade within Clade Central grouped all the haplotypes sampled from populations of the Italian subspecies C. c. italicus. In contrast, haplotypes sampled in central and southern Spain joined both Clade Central and Clade West, suggesting that subspecies C. c. garganta has admixed origin. STR data support a genetic distinction of peripheral populations in north Iberia and southern Italy, and show the effects of anthropogenic disturbance in fragmented populations, which were recently reintroduced or restocked and not may be in mutation-drift equilibrium. Roe deer in central Europe are mainly admixed, while peripheral populations in north Portugal, the southern Italian Apennines and Greece represent the remains of refugial populations and should be managed accordingly.