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bustard n.〔鳥〕鴇。

buster

The habitats for moving about of great bustard are hillocks on grassland . and they prefer to move about on the valleies of grassland during their breeding season . there are 4 main vegetation characteristic factors that determine the nest - site selection , the factors are the vegetation canopy , vegetation density , food and the height of plant . the great bustard selects the areas with higher vegetation canopy , vegetation density , plant species and insect quantity . most height of plants are below 20cm , but we also found they move about in tall grass occasionally 大鴇繁殖期活動棲息地為波狀起伏的草原漫崗地,多喜歡活動在海拔為170 300m左右,四周高、中間凹的漫崗凹地中。決定大鴇繁殖期棲息地選擇的主要植被特征因子共有4個,分別為植被蓋度因子、植被密度因子、食物因子和植物高度因子。大鴇多選擇在植被蓋度和密度較大、植物種類和昆蟲數量較多及多數植物高度在20cm以下,但又不乏高草的地方活動。

The great bustard is polyphagia bird , but it feeds mainly on plants . the feeding field habitat selection relate with that whether the grassland burn or not last year . the important factors that determine the feeding field selection are the plant species , vegetative cover score . density hemerrocallis minor and the density of pedacularis sp . on burning grasslandsjthe density of vegetation . insects quanlity . plant species richness and the height of plant are the main factors that determine the feeding field selection on unburning grasslands 大鴇是雜食性鳥類,但以植物性食物為主。對于取食地的選擇往往跟草原上一年是否被火燒過有關。在火燒地,植物種類數、植被蓋度、小黃花菜密度和蒿密度是取食地選擇的重要因素;在非火燒地,植被密度、昆蟲數量、植物物種豐富度及植物高度在大鴇取食地選擇中發揮重要作用。

The great bustard selects the areas with abundant plant species . higher vegetative cover score . smaller proportion of bare area and taller plants to display on postfire grasslands ; the important factors that influence the great bustard to selection display fields are the proportion of hay , stipa baicalensis density and the thickness of hay on unburing grassland 在火燒地,大鴇會選擇植物種類數較多、蓋度較大、裸地比例較小及植株相對較高處進行求偶炫耀;在非火燒地,枯草比例、貝加爾針茅密度及枯草厚度是影響其求偶場選擇的重要因素。

The 301 - 330bp hypervariable ii - control - region sequence in mitochondrial ( mt ) dna genome from 18 individuals of one subspecies of great bustard ( o . t . dybowskii ) from breeding areas of northwest of songliao plain , southwest of hulunbeier plateau and wintering area of shandong yellow river nature reserve in china were sequenced and population analysis was conducted to assess the level of genetic diversity 本文采集了中國境內松遼平原西北部繁殖地、呼倫貝爾高原西南部繁殖地及山東黃河三角洲自然保護區等地區大鴇東方亞種( o . tdybowskii ) 18個個體,對線粒體dna控制區高變區的部分序列進行了測定和群體分析,以評價當前中國境內的東方亞種的遺傳多樣性水平。

( 5 ) the comparing of the sequence divergence values 0 . 013 between these two subspecies ( the relevant sequences of the other subspecies of great bustard ( o . t tarda ) from genbank ) and 0 . 005 , 0 . 006 among haplotypes in different subspecieses , suggested that genetic differentiation between subspecies was larger than populations , and the genetic diversity in interpopulation was higher than intrapopulation ( 5 )與genbank中歐洲指名亞種( o . ttarda )的相應區域序列的比較顯示,兩亞種間的序列差異值為1 . 3 ,與亞種內不同單元型間的序列差異值0 . 5和0 . 6相比,說明大鴇亞種間遺傳分化較大,種群間遺傳多樣性水平稍高于種群內的。

3 . the great bustard is big - sized bird that build nest on the ground and the nests distribute in sparse group . most of their nests locate on the middle slope of hillocks , especially on the southern middle slopes towards to the sun , the biggest gradient is not more than 8 ? , the most important 3 factors that determine nest - site selection are height of plant . density and thickness of hay . 4 大鴇是營地面松散型群巢的大型鳥類,多將巢筑在海拔190 230m的草原崗坡的坡腰上,且以偏南向的朝陽緩坡的坡腰上為多,最大坡度不超過8 ,植被高度、密度和枯草厚度是決定其巢位選擇的3個最重要的因素。

On the basis of these research results , some conservation and management advices of gre at bustard were put forward : ( 1 ) the breeding areas of northwest of songliao plain and southwest of hulunbeier plateau should be looked as one conservation unit to conserve 根據上述結果,本文建議: ( 1 )應將松遼平原西北部繁殖地與呼倫貝爾高原西南部繁殖地作為一個保護單元進行保護。

The nestling of great bustard is precocity bird . the body weight is 86 . 31 + 3 . 56g when nestlings were hatched . there exists obvious difference between the growth of male and female , the growth speed of male nestlings exceed female nestlings great bustard 雌雄鴇雛鳥的生長發育之間有明顯差異,雄雛鴇生長速度快于雌雛鴇的生長速度。

I studied the courtship behavior of great bustard roundly for the r first time , and i divided the courtship into two types : attracting courtship display and acting courtship display 4 、在國內首次較全面地對大鴇的求偶炫耀行為進行研究,并將其炫耀方式分為招引型炫耀和正演型炫耀。

6 . the nest - site selection of great bustard is strict , it mainly selects the grassland with small hill which with gradient slow and nest above the middle parts of hill 6 、大鴇巢址選擇嚴格,多選擇在崗坡的中部以上、坡度較緩的草原上營巢。坡向多選擇在朝南的陽坡。

6 . the population quantity of orient subspecies of great bustard only is 500 to 800 individuals . and the distribution takes on obvious island isolation , ! 大鴇樂方亞種在我國的種群數量僅500 80o只,且分布地呈現明顯的斑塊狀隔離,是典型的瀕危物種。

I put foreward the concept gathering display field for the first time , and found that fire influences the gathering display field selection of great bustard to a certainty 首次提出集群求偶場的概念,并證明火燒對大鴇集群求偶場的選擇具有一定影響。

2 . we adopted the method , direct observation to study wild great bustard rationly for the first in china 2 、在國內首次嘗試利用直接觀察法對野生大鴇的各種行為進行定量化研究。

The factors that in fluences the nest - site selection of great bustard mainly are the hight and density of vegetation 大鴇巢址選擇的影響因于主要為植物高度和植被密度。

But up to now , the genetic diversity of great bustard in china is not reported in the world 但到目前為止,國際上關于中國境內的大鴇遺傳多樣性的研究一直未見報道。

Great bustard ( otis tarda ) is an important endangered species . it breeds in the north of china 大鴇( otistarda )是重要的瀕危物種,在中國三北地區有多個繁殖種群。

The female great bustard has the behavior to turn over eggs and move eggs during the hatching pereiod 98枚( n二53 ) 。多卵期間雌鴇有翻百。移卵的行為。

Bustards are now associated with the badger mk ii for invention purposes as the bpc requirement 大鴇級飛船現作為獾級藍圖ii的發明要求。

Male great bustard has the behavior to gather to display in the displaying fields 雄鴇在求偶場有集群求偶炫耀行為。