Results 11 to 20 of about 1,103 (205)
鸳鸯(Aix galericulata)这种珍贵鸟类,过去一般认为在贵州为冬候鸟。近来年,贵州省内的动物学工作者,观察到鸳鸯在贵州省的遵义、铜仁、贵阳和贵定等部分地区留居,并且积累了一些繁殖资料(吴至康等,1983)。但关于繁殖生态的研究,未见有系统的报导。为此,我们于1983年4—5月,在梵净山东南麓,对鸳鸯繁殖生态作了初步观察,结果如下。
杨炯蠡, 邹迅, 林乾正
doaj +2 more sources
虎纹伯劳(Lanius tigrinus)是一种经济鸟类,关于其繁殖生态的研究,国内尚未见有系统的报导。我们于1979年5—10月及翌年同期,在山西省太谷县,对虎纹伯劳的繁殖生态进行了初步的调查研究。1981年6—8月在太原市南郊区又做了一些补充调查。两地均位于太原盆地的平川地区,现将几年的资料整理报导如下。
刘焕金+3 more
doaj +2 more sources
Integrating adult occurrence and reproduction data to identify conservation measures for amphibians. [PDF]
Abstract Monitoring programs are pivotal to establishing sound management. Due to economic, logistic, and time limitations, monitoring programs often overlook differences among life‐history stages. However, species occurrence does not necessarily mean population viability, and it is unclear to what extent monitoring programs that do not consider ...
Lo Parrino E+4 more
europepmc +2 more sources
花尾榛鸡(Tetrastes bonasiasibirius)俗称飞龙,是我国著名狩猎珍禽、国家二类保护动物。关于榛鸡的生态国内外学者先后做过一些研究记述(1952,1960,周福璋,1964,赵正阶,1977)但驯养繁殖需模拟参考的繁殖生态略嫌粗略。现将我们自1983年初至1986年未在大兴安岭呼中地区对花尾榛鸡长期定点观察研究结果简要报告如下:
朱作斌+5 more
doaj +2 more sources
作者于1984年和1985年的3—6月在四川省北部龙门山地区北川县境内的原始林中对勺鸡(Pucrasia macrolopha ruficollis)的繁殖生态进行了观察。考察是在海拔1,600米至2,400米之间勺鸡数量较多的亚热带常绿落叶阔叶混交林中进行的。林中常绿树种主要有包石栎 (Lithocarpus cleistocarpus)、
李湘涛
doaj +2 more sources
2004~2005年,对人工饲养的长鬣蜥繁殖行为和生态习性进行了研究,结果表明:3~7月为长鬣蜥的繁殖期,繁殖行为主要表现为发情求偶、交配和产卵,5~6月为产卵高峰期,每条成熟的雌蜥年产卵2~3窝,平均窝卵数12(7~18)枚;雌蜥每窝产卵间隔33~45 d不等;平均单卵重3.06(2.80~3.50)g;卵径2.63 cm×1.18cm。在自然孵化温度和90%~95%的湿度下孵化期为60~98 d,孵化率52.34%,长鬣蜥幼体初生个体重2.50 g,体全长(头体+尾)14(4+10)cm。
侯方晖, 苏力, 邹洁建
doaj +2 more sources
Diversidad de orquídeas en la isla de Hainan en China: distribución y conservación [PDF]
Orchidaceae are widely distributed in many terrestrial ecosystems except for polar and desert areas and constitute a “flagship group” in biological conservation.
He, R. X.+3 more
core +6 more sources
Simulating the efficacy of wolf–dog hybridization management with individual‐based modeling
In the photo, an introgressed adult wolf–dog in the Northern Apennines, Italy, not far from the city of Bologna. Part of a research program, this male has been sterilized and released back in its own pack with a Global Positioning Collar. Abstract Introgressive hybridization between wolves and dogs is a conservation concern due to its potentially ...
Nina Luisa Santostasi+4 more
wiley +1 more source
欧夜鹰(Caprimulgus europaeus)属夜行性鸟类。广泛分布于新疆荒漠地区,如乌鲁木齐、阿勒泰、克拉玛依、昌吉州、吐鲁番、哈密、阿克苏、库尔勒、喀什等地区(Ma,2001 ...
张新民, 梅宇, 胡宝文, 马鸣
core
Anatomical study of nectar gland development and changes in sugar content in Trifolium ambiguum Bieb. [PDF]
[Objective] Trifolium ambiguum Bieb. is an excellent nectar source plant, and understanding the morphological characteristics, tissue structure, and development are critical for proper utilization of T . ambiguum resources. [Methods] Nectar glands of T
CHANG Yadi+4 more
core +1 more source