| Records |
Author  |
Novacek, M.J. |
| Title |
Mammalian phylogeny: shaking the tree |
Type |
Journal Article |
| Year |
1992 |
Publication |
Nature |
Abbreviated Journal |
Nature |
| Volume |
356 |
Issue |
6365 |
Pages |
121-125 |
| Keywords |
Animals; Evolution; Fossils; Mammals/classification/*genetics; *Phylogeny |
| Abstract |
Recent palaeontological discoveries and the correspondence between molecular and morphological results provide fresh insight on the deep structure of mammalian phylogeny. This new wave of research, however, has yet to resolve some important issues. |
| Address |
American Museum of Natural History, New York 10024 |
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| Language |
English |
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| ISSN |
0028-0836 |
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| Notes |
PMID:1545862 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
3546 |
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| Author |
Nagy, M.; Akos, Z.; Biro, D.; Vicsek, T. |
| Title |
Hierarchical group dynamics in pigeon flocks |
Type |
Journal Article |
| Year |
2010 |
Publication |
Nature |
Abbreviated Journal |
Nature |
| Volume |
464 |
Issue |
7290 |
Pages |
890-893 |
| Keywords |
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| Abstract |
Animals that travel together in groups display a variety of fascinating motion patterns thought to be the result of delicate local interactions among group members1, 2, 3. Although the most informative way of investigating and interpreting collective movement phenomena would be afforded by the collection of high-resolution spatiotemporal data from moving individuals, such data are scarce4, 5, 6, 7 and are virtually non-existent for long-distance group motion within a natural setting because of the associated technological difficulties8. Here we present results of experiments in which track logs of homing pigeons flying in flocks of up to 10 individuals have been obtained by high-resolution lightweight GPS devices and analysed using a variety of correlation functions inspired by approaches common in statistical physics. We find a well-defined hierarchy among flock members from data concerning leading roles in pairwise interactions, defined on the basis of characteristic delay times between birds’ directional choices. The average spatial position of a pigeon within the flock strongly correlates with its place in the hierarchy, and birds respond more quickly to conspecifics perceived primarily through the left eye—both results revealing differential roles for birds that assume different positions with respect to flock-mates. From an evolutionary perspective, our results suggest that hierarchical organization of group flight may be more efficient than an egalitarian one, at least for those flock sizes that permit regular pairwise interactions among group members, during which leader–follower relationships are consistently manifested. |
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Macmillan Publishers Limited. All rights reserved |
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0028-0836 |
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| Notes |
10.1038/nature08891 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
5111 |
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| Author |
Moon, C.; Baldridge, M.T.; Wallace, M.A.; Burnham, C.-A.D.; Virgin, H.W.; Stappenbeck, T.S. |
| Title |
Vertically transmitted faecal IgA levels determine extra-chromosomal phenotypic variation |
Type |
Journal Article |
| Year |
2015 |
Publication |
Nature |
Abbreviated Journal |
Nature |
| Volume |
521 |
Issue |
7550 |
Pages |
90-93 |
| Keywords |
Phenotype |
| Abstract |
The proliferation of genetically modified mouse models has exposed phenotypic variation between investigators and institutions that has been challenging to control1-5. In many cases, the microbiota is the presumed culprit of the variation. Current solutions to account for phenotypic variability include littermate and maternal controls or defined microbial consortia in gnotobiotic mice6,7. In conventionally raised mice, the microbiome is transmitted from the dam2,8,9. Here we show that microbially–driven dichotomous fecal IgA levels in WT mice within the same facility mimic the effects of chromosomal mutations. We observed in multiple facilities that vertically-transmissible bacteria in IgA-Low mice dominantly lowered fecal IgA levels in IgA-High mice after cohousing or fecal transplantation. In response to injury, IgA-Low mice showed increased damage that was transferable by fecal transplantation and driven by fecal IgA differences. We found that bacteria from IgA-Low mice degraded the secretory component (SC) of SIgA as well as IgA itself. These data indicate that phenotypic comparisons between mice must take into account the non-chromosomal hereditary variation between different breeders. We propose fecal IgA as one marker of microbial variability and conclude that cohousing and/or fecal transplantation enables analysis of progeny from different dams. |
| Address |
Department of Pathology and Immunology, Washington University School of Medicine, St Louis, Missouri 63110, USA. |
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eng |
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0028-0836 |
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no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
6005 |
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| Author |
Milinski, M.; Rockenbach, B. |
| Title |
Human behaviour: Punisher pays |
Type |
Journal Article |
| Year |
2008 |
Publication |
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Abbreviated Journal |
Nature |
| Volume |
452 |
Issue |
7185 |
Pages |
297-298 |
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| Abstract |
The tendency of humans to punish perceived free-loaders, even at a cost to themselves, is an evolutionary puzzle: punishers perish, and those who benefit the most are those who have never punished at all.
Humans are champions of cooperation. Reciprocity – the idea that, if I help you this time, you'll help me next time1 – is a secret of our success. |
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Nature Publishing Group |
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0028-0836 |
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| Notes |
10.1038/452297a |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
4405 |
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| Author |
McGonigle, B. |
| Title |
Can apes learn to count? |
Type |
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| Year |
1985 |
Publication |
Nature |
Abbreviated Journal |
Nature |
| Volume |
315 |
Issue |
6014 |
Pages |
16-17 |
| Keywords |
Animals; Behavior, Animal/physiology; Cognition; Pan troglodytes/*physiology |
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0028-0836 |
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| Notes |
PMID:3990806 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
2794 |
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| Author |
McElreath, R.; Luttbeg, B.; Fogarty, S.P.; Brodin, T.; Sih, A. |
| Title |
Evolution of animal personalities |
Type |
Journal Article |
| Year |
2007 |
Publication |
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Abbreviated Journal |
Nature |
| Volume |
450 |
Issue |
7167 |
Pages |
E5-E5 |
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Nature Publishing Group |
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0028-0836 |
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| Notes |
10.1038/nature06326 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
4295 |
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| Author |
Maynard Smith, J.; Price, G.R. |
| Title |
The Logic of Animal Conflict |
Type |
Journal Article |
| Year |
1973 |
Publication |
Nature |
Abbreviated Journal |
Nature |
| Volume |
246 |
Issue |
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Pages |
15-18 |
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| Notes |
10.1038/246015a0 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
4844 |
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| Author |
Matsuzawa, T. |
| Title |
Use of numbers by a chimpanzee |
Type |
Journal Article |
| Year |
1985 |
Publication |
Nature |
Abbreviated Journal |
Nature |
| Volume |
315 |
Issue |
6014 |
Pages |
57-59 |
| Keywords |
Animals; Behavior, Animal/physiology; Cognition; Female; Mathematics; Pan troglodytes/*physiology |
| Abstract |
Recent studies have examined linguistic abilities in apes. However, although human mathematical abilities seem to be derived from the same foundation as those in language, we have little evidence for mathematical abilities in apes (but for exceptions see refs 7-10). In the present study, a 5-yr-old female chimpanzee (Pan troglodytes), 'Ai', was trained to use Arabic numerals to name the number of items in a display. Ai mastered numerical naming from one to six and was able to name the number, colour and object of 300 types of samples. Although no particular sequence of describing samples was required, the chimpanzee favoured two sequences (colour/object/number and object/colour/number). The present study demonstrates that the chimpanzee was able to describe the three attributes of the sample items and spontaneously organized the 'word order'. |
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0028-0836 |
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| Notes |
PMID:3990808 |
Approved |
no |
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Equine Behaviour @ team @ |
Serial |
2793 |
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| Author |
Marean, C.W.; Gifford-Gonzalez, D. |
| Title |
Late Quaternary extinct ungulates of East Africa and palaeoenvironmental implications |
Type |
Journal Article |
| Year |
1991 |
Publication |
Nature |
Abbreviated Journal |
Nature |
| Volume |
350 |
Issue |
6317 |
Pages |
418-420 |
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| Abstract |
UNGULATE communities of two East African savannas, the Serengeti and Athi-Kapiti Plains, are dominated by wildebeest (Connochaetes taurinus) supplemented by zebra (Equus burchelli), topi (Damaliscus lunatus), hartebeest (Alcelaphus buselaphus), buffalo (Syncerus caffer) eland (Taurotragus oryx) and gazelles (Gazella grand and G. thomsoni)1-3. Before this research, little was known of East African large mammal communities in the Late Pleistocene and early to middle Holocene. We document an extinct impala-sized alcelaphine antelope that is numerically dominant in Late Pleistocene archaeofaunal assemblages from the Athi-Kapiti Plains. The extinct giant buffalo Pelorovis antiquus is present, and a number of arid-adapted regionally extinct species are common. The small alcelaphine is rare in northern Tanzania, but regionally extinct arid-adapted species are present in Late Pleistocene deposits. These data indicate that as recently as 12,000 years ago, the large mammal community structure of East African savannas was very different and dry grasslands and arid-adapted ungulates expanded at least as far south as northern Tanzania during the Last Glacial Maximum. |
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| Notes |
10.1038/350418a0 |
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no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
2345 |
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| Author |
Johnson, D.D.P.; Stopka, P.; Knights, S. |
| Title |
Sociology: The puzzle of human cooperation |
Type |
Journal Article |
| Year |
2003 |
Publication |
Nature |
Abbreviated Journal |
Nature |
| Volume |
421 |
Issue |
6926 |
Pages |
911-2; discussion 912 |
| Keywords |
Altruism; *Cooperative Behavior; Evolution; Humans; *Models, Biological; Punishment; Reward; Risk |
| Abstract |
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| Address |
Olin Institute for Strategic Studies, Harvard University, Cambridge, Massachusetts 02138, USA. dominic@post.harvard.edu |
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English |
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0028-0836 |
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| Notes |
PMID:12606989 |
Approved |
no |
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refbase @ user @ |
Serial |
467 |
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