全文获取类型
收费全文 | 82篇 |
免费 | 1篇 |
国内免费 | 4篇 |
专业分类
87篇 |
出版年
2018年 | 1篇 |
2012年 | 1篇 |
2010年 | 1篇 |
2007年 | 1篇 |
2006年 | 4篇 |
2004年 | 1篇 |
2003年 | 1篇 |
2001年 | 2篇 |
2000年 | 2篇 |
1998年 | 1篇 |
1997年 | 4篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1994年 | 6篇 |
1993年 | 5篇 |
1992年 | 11篇 |
1991年 | 8篇 |
1990年 | 1篇 |
1989年 | 4篇 |
1988年 | 11篇 |
1987年 | 2篇 |
1986年 | 2篇 |
1985年 | 5篇 |
1984年 | 2篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1980年 | 1篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1976年 | 1篇 |
排序方式: 共有87条查询结果,搜索用时 15 毫秒
11.
F. Bigoni U. Koehler R. Stanyon T. Ishida J. Wienberg 《American journal of physical anthropology》1997,102(3):315-327
We employed in situ hybridization of chromosome-specific DNA probes (“chromosome painting”) of all human chromosomes to establish homologies between the human and the silvered lead monkey karyotypes (Presbytis cristata 2n=44). The 24 human paints gave 30 signals on the haploid female chromosome set and 34 signals on the haploid male chromosome set. This difference is due to a reciprocal translocation between the Y and an autosome homologous to human chromosome 5. This Y/autosome reciprocal translocation which is unique among catarrhine primates has produced a X1X2Y1Y2/X1X1X2X2 sex-chromosome system. Although most human syntenic groups have been maintained in the silvered leaf monkey chromosomes homologous to human chromosomes 14 and 15, 21 and 22 have experienced Robertsonian fusions. Further, the multiple FISH signals provided by libraries to human chromosomes 1/9, 6/16 indicate that these chromosomes have been split by reciprocal translocations. G-banding analysis shows three different forms of chromosome 1 (X2) which differ by a complex series of inversions in the 10 individuals karyotyped. Comparisons with the hybridization patterns in hylobatids (gibbons and siamang) demonstrate that resemblances in chromosomal morphology and banding previously taken to indicate a special phylogenetic relationship between gibbons and colobines are due to convergence. A. J. Phys. Anthropol. 102:315–327, 1997. © 1997 Wiley-Liss, Inc. 相似文献
12.
Little is known about the fate of adult male residents after they are ousted from bisexual one-male troops of Hanuman langurs
(Presbytis entellus) in the course of adult male replacements. In a long term study at Jodhpur, Rajasthan, it was possible to reconstruct partial
life histories of several ousted residents. One resident was killed during the male change. Ousted residents did not regain
residency despite their continued invasions into bisexual troops. It is assumed that the males' chances to take over and to
defend a troop are restricted to an age of 9–14 years, when the males are in prime physical condition. One male became solitary
for some months while trying to regain residency of his old troop, before joining some “alien” males. As a rule, males are
likely to rejoin their own male bands if they are ousted after short periods of residency. If the residency exceeds 3 months
then the ongoing structural change in the former band may prevent their reintegration. However, in such cases, ousted residents
which belonged to the same band may reunite and mingle with another male band which lacks prime males. Weaned sons may follow
their fathers after ousting. In the case of numerous weaned offspring, fathers and sons may together form at least temporary
new male bands. 相似文献
13.
Two pairs of twins were observed in free-ranging Hanuman langurs (Presbytis entellus) at Jodhpur, India. Each twin had a preferred nipple for suckling, the preference of which developed during the first 5 weeks
of life. The behaviour of the twins was mostly synchronized. In more than 60% of all activity bouts both showed the same behaviour,
with “nipple contact” and “playing” prevailing. Differences in physical strength and development were apparent within each
pair. While the total amount of allomothering was almost the same, individual weekly scores differed considerably. 相似文献
14.
灵长类(除猕猴属外)在中国的分布 总被引:2,自引:0,他引:2
本文从动态动物地理学观点对中国灵长类(不包括猕猴)的分布进行了分析,提出:(1)中国灵长类自更新世时的分布呈现向南退缩的总趋势,并随气候的变迁而波动,晚更新世向南退缩最为明显;(2)根据Jablonski等认为,我国特有种金丝猴的不连续分布,是由于青藏高原抬升的影响。作者总结了迄今所知的金丝猴生态地理分化特点,对此假说未提出异议,(3)由于除猕猴以外的我国灵长类生态上与森林环境有密切联系,而森林被破坏直接对灵长类在我国分布区的缩小与岛状断裂影响最大,近期可能绝灭的地点甚多。 相似文献
15.
本文记述的云南江川、保山发现的三种猕猴类:江川猕猴(Macaca jiangchuanensis sp.nov.),早更新世;保山塘子沟的短尾猴(M.arctoides)和菲氏叶猴(Presbytis cf.phayrei),早全新世,经~(14)C年代测定约7000年B.P.。江川猕猴是联系西瓦立克地区和华北地区的早期猕猴类型,为南方早更新世猕猴种的首次记录。保山菲氏叶猴的发现意义则是在更新世一全新世时期猴科的地史和地理分布上增加了新的成员。 相似文献
16.
17.
本文首次报道3种叶猴脊神经丛的组成,并与其他灵长类作了比较研究。结果表明:颈丛由C_(1-4)组成,多数标本不存在枕小神经和多数标本存在舌下袢;臂丛由C_4—T_2组成,形成典型的三干三索结构,后索形成两个神经袢;腰骶丛由L_(2-7)和S_(1-2)组成,存在屈股神经和耻坐股神经,与猴超科共同特征相一致。 相似文献
18.
This paper discusses the taxonomy and distribution ofPresbytis francoisi. We are especially concerned with the classification of the white-headed langur.T'an (1957) suggested that the white-headed langur be classified as a separate species,Presbytis leucocephalus. We suggest that the white-headed langur is a subspecies ofPresbytis francoisi and should be referred to asP. francoisi leucocephalus. The distribution of the six subspecies of the françois' langur,P. f. delacouri, P. f. francoisi, P. f. hatinhensis, P. f. laotum, P. f. leucocephalus, andP. f. poliocephalus, is limited to southeastern Asia. 相似文献
19.
Volker Sommer 《Primates; journal of primatology》1987,28(2):163-197
Considerable disagreement characterizes the debate concerning frequency, causation, and function of infanticide in connection
with adult male replacements in bisexual one-male troops of hanuman langurs (Presbytis entellus). Detailed observations are presented about two noninfanticidal and three infanticidal male changes including six eye-witness
and five presumed cases of infanticide within three langur troops during a long-term study at Jodhpur, Rajasthan, India. The
results do not support any explanatory hypotheses focussing on social crowding, regulation of population density, social stress,
sexual frustration, incest avoidance, or social bonding, but are in general though not total agreement with the reproductive
advantage hypothesis: mainly unrelated infants were killed (one possible exception), the infanticidal male generally sired
the subsequent offspring (one exception), and the mean interbirth interval subsequent to infanticide is by 2.1 months shortened.
Likewise, several cases of stress induced abortions occurred. It is demonstrated that postconception estrous behaviour is
by no means a female counterstrategy to infanticide in order to confuse males concerning the issue of paternity, since an
infanticidal male did not spare the subsequent offspring of mothers who copulated with him during pregnancy and pregnant females
did not discriminate between fathers and non-fathers. 相似文献
20.