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鸟类核型研究 Ⅰ.雀科11种 总被引:8,自引:4,他引:4
本文报道了雀形目雀科(Fringillidae)11种鸟类核型。并将其他作者报道的该科其他种类的核型汇总做了配对分析比较。臂间倒位和小染色体相互融合在该科核型进化中起了重要作用。 相似文献
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鸟类核型研究Ⅱ.雀形目12科19种 总被引:4,自引:2,他引:4
本文首次报道了雀形目12科19种鸟类核型。其中岩鹨科、攀雀科、绣眼鸟科为世界上首次报道核型的科。通过比较我们发现臂间倒位及小染色体的融合在核型进化中起了重要作用,同时对雀形目鸟类核型起源作了初步的探讨。 相似文献
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肠道菌群是维持机体健康的重要组成部分,了解动物肠道菌群多样性有助于认识和理解动物的生态学适应。已有报道表明荒漠沙鼠肠道微生物有助于其对荒漠环境的适应,但对于广泛分布于荒漠环境的跳鼠的肠道微生物群落结构、多样性的研究尚不明确。本研究以栖息于新疆荒漠地区的跳鼠科(Dipodidae)为对象,采用16S rRNA高通量测序技术对荒漠跳鼠4个亚科的代表物种三趾跳鼠(Dipus sagitta)、五趾跳鼠(Orientallactage sibirica)、长耳跳鼠(Euchoreutes naso)和三趾心颅跳鼠(Salpingotus kozlovi)的肠道微生物进行分析。共获得1557065条有效序列,发现2708个ASV,归属于20个门、50个纲、71个目、142个科和336个属。Alpha多样性指数中,长耳跳鼠和三趾心颅跳鼠组的ACE指数和Chao1指数显著低于其他两组,而Shannon指数和Simpson指数在4组样品中无显著差异。主坐标分析(PCoA)结果表明,4种跳鼠的肠道菌群结构具有显著差异。LEfSe分析表明,4种跳鼠肠道菌群共有10个显著差异的细菌菌属,其中大部分归属拟杆菌... 相似文献
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《古脊椎动物学报》2017,(3)
陕西子洲县中侏罗统延安组砂岩中,同一地点共厚约1.7 m的5个层面发现4种食肉类恐龙足迹,自上而下分别为:1)第5层面大型三趾型足迹,实雷龙足迹科王氏子洲足迹(新遗迹属、新遗迹种)Zizhoupus wangi ichnogen.et ichnosp.nov.;2)第4和第3层面中型三趾型足迹,实雷龙足迹科龙尾峁张北足迹(新遗迹种)Changpeipus longweimaoensis inchnosp.nov.;3)第2层面小型三趾或四趾型足迹,虚骨龙类小理河陕西足迹(新遗迹种)Shensipus xiaoliheensis inchnosp.nov.;4)第1层面小型三趾型足迹,虚骨龙类的铜川陕西足迹Shensipus tungchuanensis。 相似文献
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J. Sneyd Taylor 《Ostrich》2013,84(1):44-49
McLachlan, A., Woodridge, T., Schramm, M. &; Kühn, M. 1980. Seasonal abundance, biomass and feeding of shore birds on sandy beaches in the Eastern Cape, South Africa. Ostrich 51:44-52. The numbers of birds on three Eastern Cape sandy beaches were monitored monthly over one year during 1977/78. Dominant among 17 species were the Southern Blackbacked Gull Larus dominicanus, Black Oystercatcher Haematopus moquini, Whitefronted Sandplover Charadrius marginatus and Sanderling Calidris alba. These four species made up 95% of bird numbers and their respective biomass values were 78 652, 7 695, 578 and 3 116 kJ/km shoreline. Total food consumption for these species, calculated on the basis of estimated standard metabolic rates, was 4 159 394, 521 149, 76 768 and 363 053 kJ/km respectively. Food composition and feeding behaviour are also discussed and the total quantity of intertidal macrobenthic animals consumed by birds estimated. 相似文献
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我國鳥類迄今所知(詳見鄙著,1947a),計有1,087(14?)種,分隸於388(2?)屬,82科,20目。筆者於1945-46年,承聘赴美,得有機緣,遍研紐約自然博物館、哈佛大學及美京國立博物館所藏的吾國鳥類採集,而特留意所檢的各種禽鳥標本在吾國境内的採期舆產地,冀得劃出其分布的區域。此外復益以從前學者在吾國境内採集觀察的所得(參閱鄙著,1947b),互引徵證;現就研究所及,将吾國鳥類的各屬在我國境内的分布情形,彙列為表一(附在文後)。茲将表一中各地區所錄得的屬數,依序臚列如次: 相似文献
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Boshoff, A.F., Palmer, N.G. & Piper, S.E. 1991. Spatial and temporal abundance patterns of water-birds in the southern Cape Province. Part 3: Wading birds. Ostrich 62:197-214. Wading birds (herons, egrets, spoonbills, flamingoes and waders) were counted, and water-level and water transparency measured, on a monthly basis from 1980 to 1983 or 1984, at the six waterbodies comprising the Wilderness-Sedgefield Lakes Complex, southern Cape Province. The fluctuating status of the submerged aquatic macrophytes, and the trophic status of the waterbodies, was documented. The counts reflect the monthly status of the birds, and allow the calculation of densities (birds/ha). Linear and logarithmic models aided the interpretation of the count data. Spatial and temporal patterns and trends are described, and discussed in relation to changes in water-level, water transparency and aquatic macrophyte biomass regimes in the study area. Water-level was an important environmental parameter and was generally negatively correlated with abundance. 相似文献
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Thales Renato O. de Freitas 《Acta theriologica》2007,52(2):171-180
Ctenomys lami Freitas, 2001 is an endemic species of rodent inhabiting the Coastal Plain of southern Brazil, along a narrow line of old
dunes formed in the Pleistocene. This species has five different diploid numbers (2n=54, 55a, 55b, 56a, 56b, 57 and 58) and
ten different autosomal fundamental numbers (FNa=74, 75, 76, 77, 78, 79, 80, 81, 82, and 84). In a sample of 102 specimens,
the combined 2n and FNa formed 26 different karyotypes. The diploid number variation was due to Robertsonian rearrangements
that occur in pairs 1 and 2, and the variation of NFas was due to pericentric inversions. The distribution of diploid number
variation along the 78 km line of collection sites reveals four population blocks: block A with 2n=54, 55a, and 56a; block
B with 2n=57 and 58; block C with 2n=54 and 55a; and block D with 2n=56b and 55b. The inversion system lacks geographic structure
with a random distribution of inversions along the population blocks. A very narrow hybrid zone is hypothesized between blocks
A and B. Blocks B and C are separated by a geographic barrier, and another hybrid zone is found between blocks C and D. My
findings suggest that this species is undergoing a process of speciation due to geographic isolation. 相似文献