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<正>卡拉麦里山的地形起伏不大,大部分山体较为开阔平坦且植被条件良好,是盘羊生存的理想生境。由于卡拉麦里山与周围山系相对隔离,与其他种群缺少联系,在卡拉麦里生活的盘羊为戈壁盘羊。这一相对独立的特殊种群由于其独特生境和相对独立的演化过程有很高的科学研究价值,也让卡拉麦里“有蹄类野生动物王国”的称号更加响亮。 相似文献
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采用目标动物取样法对科克森国际狩猎场盘羊夏季昼间行为进行了观察分析,结果表明:盘羊的行为分为采食、警惕、休息、运动、修饰和其他6种类型,各类行为所占比例雌羊为37.82%、4.58%、42.57%、8.07%、3.66%、3.29%,休息行为消耗的时间最多,"其他"行为消耗时间最短;雄羊为39.46%、6.24%、34.23%、12.80%、3.60%、3.67%,采食行为所消耗时间占最多,修饰消耗时间最短。在一天中盘羊的休息有1个高峰期,持续时间较长,从11:00持续到18:00;采食有2个高峰期,分别出现在6:00—10:00和19:00—22:00;在17:00—18:00有1个较为明显的运动高峰期,然后迅速降低。其他行为在一天中发生较为随机,雌雄在警惕、休息和运动上差异性显著(P0.05),而在采食、修饰和其他行为上差异性不显著(P0.05)。 相似文献
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在内蒙古西部阿拉善右旗境内,分布着一种珍贵的野生动物──盘羊,当地牧民俗称大头羊。由于盘羊所处的生存环境不同,产生了毛色和其它方面的变异。阿拉善右旗野生盘羊有两个较大的种群,大体分布在雅布赖山中段和与此相邻的巴丹吉林沙漠边缘。其中雅布赖山中的一支分布在以沙枣沟为中心,方圆约200平方公里的范围内,其个体较大、毛色为白色,由于长期在山中生活,蹄子较短。另一支分布在紧靠雅布赖山北面的巴丹吉林沙漠边缘,毛色发黄,与沙漠的颜色相近,形成保护色,由于它们在松软的沙漠中活动,磨蚀作用较弱,其蹄部较长且宽。据当… 相似文献
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通过机动车样线和步行样线两种调查方式,采用距离取样方法,对新疆塔什库尔干地区岩羊(Pseudoisnayaur)和北山羊(Capra sibirica)的种群数量进行了调查分析。采用AIC拟合模型分析结果显示,机动车样线调查获得的岩羊密度为2.652只/km2~4.344只/km2,北山羊密度为0.046只/km2~0.070只/km2.步行样线调查获得的密度较低,岩羊密度为0.315只/km2~0.427只/km2,北山羊密度为0.117只/km2~0.175只/km2.机动车样线调查模型中,遇见率在两种有蹄类动物密度差异中贡献最大,从72.6%到98.6%;在步行样线调查模型中,遇见率对北山羊的密度差异贡献最大。群个体数对步行样线有蹄类动物密度差异的贡献率高于机动车样线调查。 相似文献
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采用样线法和样方法对凉山州冕宁县冶勒乡省级自然保护区垂枝香柏群落127个样方进行调查,结果表明,垂枝香柏种群内个体年龄最小值为4.8 a,最大值为679.3 a,平均年龄为266.5 a。保护区垂直香柏种群属下降型种群,种群的死亡率大于出生率。 相似文献
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《西部林业科学》2018,(6)
采用半结构访谈法、样线法和红外相机技术相结合的研究方法,对西双版纳国家级自然保护区内的灰孔雀雉进行调查研究,结果表明,西双版纳国家级自然保护区除曼稿子保护区外,勐养、勐仑、勐腊、尚勇4个子保护区均有灰孔雀雉分布,潜在分布面积约222 825hm~2。春季种群密度为0. 004 60只/hm~2,种群数量为1 009只,冬季种群密度为0. 003 76只/hm~2,种群数量为858只,全年平均种群密度0. 004 18只/hm~2,种群数量平均值为931只,按照±5%的误差率来估算,西双版纳国家级自然保护区灰孔雀雉种群数量理论值为884-978只。灰孔雀雉对亚热带常绿阔叶林、热带雨林、热带季雨林3种生境有选择偏好,分布在海拔624-1 750m的区域。针对灰孔雀雉种群保护现状,提出了相应的保护措施。 相似文献
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《Scandinavian Journal of Forest Research》2012,27(1-4):575-581
An appropriate moose management requires knowledge about how the economy of moose, in terms of values (benefits) and costs, responds to alterations in the moose population. This article, that is based on an empirical study, focuses on one segment of this problem field—the value of moose hunting. It deals with the question of how this value, including aspects of recreation as well as meat, is changing when the moose population density is altered. Furthermore, the article discusses the significance to the hunting value of the moose population's age structure. Generally the hunting value increases—but at a decreasing rate—as the moose population density is increased. There are, however, large geographical differences, so that a certain increase in the moose population density means a lot to the hunting value in one region but less in another. Many moose hunters would, in consideration of their own hunting pleasure, prefer an adult/calve ratio for the bag of moose that diverges considerably from what is stipulated by the authorities. 相似文献
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lntr0ducti0nTherearetivespeciesofswaninthew0rld.1'l1reeoftIlemwererecordedinCl1il1a.The}'arewhooperswal1(t:l:VnllsL:l;Vnlts).whistlingswal1(`:l;\'I1lIScohIn1hUIIIlIS)andInuteswan(`111q)1lls()l()r)lll.Amongthem.whooperswanis'themostthmousinChina.Because0ft… 相似文献
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本研究以长沙市主城区556平方公里的城市森林为研究对象,应用GIS技术与野外调查相结合的方法,以城市森林生态学、景观美学原理为基础,分类型对城市森林空间布局、种群结构、树种构成、径阶分布等结构特征进行分析。结果显示:各森林类型在森林结构上都存在树龄较小,所用树种单调等特点,种群和群落结构配置不舍理。针对长沙市城市森林存在的问题,结合城市森林结构的特点和森林的可持续发展,对长沙市城市森林建设提出了建议。 相似文献
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Yuan Li Li Xiaomin Yu Hongxian Guo Libin Zhang Taizhong Gao Qingjun Zeng Daihua 《林业研究》1997,8(4):235-239
There are five species of swan in the world. Three of them were recorded in China. They are whooper swan (Cygnus cygnus), whistling swan (Cygnus columbianus) and mute swan (Cygnus olor). Among them. whooper swan is the most famous in China. Whooper swan is a resident bird in China. They breed in Xinjiang
Ugyur Autonomous Region. Inner Mongol Autonomous Region. Heilongjiang Province. etc., and winter in Qinghai. Shandong. Henan
Province, etc, and the lower reaches of the Changjiang River. The total number in China is about 5.000 in breeding grounds
and 15.000 in wintering grounds. Higher number were found in 1960s. Because of the changes in environment and hunting, of
picking up eggs and of catching nestlings, their population is being reduced rapidly. They are in danger now. In order to
protect the whooper swans, some protection measures must be taken, such as strengthening public education and scientific research,
estabilshing a base of raising and breeding: developing international cooperation, strengthening the construction of natural
reserves in the breeding and wintering grounds. Up to the end of 1993. 34 natural reserves have been established in China.
(Responsible Editor: Sun Yueqi) 相似文献
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白水江自然保护区龙头竹种群年龄结构的初步研究 总被引:3,自引:0,他引:3
生物种群的数量具有相对稳定性。国内外许多植物生态学家对多种竹子进行了很多有成效的研究。但对大熊猫所食的龙头竹研究甚少,特别是对其立竹年龄结构规律的研究还是一项空白。鉴于发现大熊猫活动区主食龙头竹有开花现象,为了掌握其种群动态,本文依据笔者1988年的调查资料,以甘肃南部白水江自然保护区内大熊猫的主食龙头竹林为对象,讨论了龙头竹种群立竹年龄结构规律。 相似文献
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In Sweden, management of moose is important due to considerable values as well as costs associated with this game species. An overarching question is how much moose Sweden should have. This short communication is delimited to the question of what the hunting value of moose is and what the hunting value would be given alternative levels of moose population density and allowed harvest. It is based on data from a mail contingent valuation survey that involved randomly selected hunters from a national register. The results showed that moose was the economically most important game species in Swedish hunting. The results also suggested that the hunting value would increase, but at a decreasing rate, if the moose population density and allowed harvest were increased – and vice versa. The findings should be of considerable interest in the context of adaptive moose management. 相似文献
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采用"空间替代时间"和扩散系数(C)等6种聚集度指数研究福建省长汀县石峰寨野生桂花种群大小结构及空间分布格局,并探讨桂花在不同生长阶段的空间格局变化过程。结果表明,桂花种群大小级结构随不同年龄阶段增长数量呈相对减少的趋势,种群结构较年轻且平稳,从幼树向中树过渡阶段存在着一个过滤筛。桂花种群在不同样地的分布格局具一定差异性,这是由于限制因子与种群适应对策综合作用的结果。不同生长阶段种群的分布格局基本上由集群型转变为随机型,聚集度不断减小,幼苗和幼树阶段的桂花种群为集群分布,到成树阶段则转变为随机分布。 相似文献