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Animal species and evolution
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The article was published on 1963-01-01 and is currently open access. It has received 7870 citations till now. The article focuses on the topics: Species problem.read more
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Journal ArticleDOI
Multiple interacting loci control sex determination in lake malawi cichlid fish
TL;DR: The inheritance of sex in 19 fish species from the rapidly evolving flock of cichlids in Lake Malawi, Africa is described and it is found that many of these species have a male heterogametic system on linkage group 7.
Journal ArticleDOI
Ecological drivers of global gradients in avian dispersal inferred from wing morphology.
Catherine Sheard,Catherine Sheard,Montague H. C. Neate-Clegg,Montague H. C. Neate-Clegg,Nico Alioravainen,Nico Alioravainen,Samuel E. I. Jones,Samuel E. I. Jones,Claire Vincent,Hannah E. A. MacGregor,Hannah E. A. MacGregor,Tom P. Bregman,Santiago Claramunt,Santiago Claramunt,Joe Tobias,Joe Tobias +15 more
TL;DR: Variation of hand-wing index in over 10,000 bird species is examined, finding that it is higher in migratory and non-territorial species, and lower in the tropics, and also a strong predictor of geographical range size.
Journal ArticleDOI
Extensive genetic variation in mitochondrial dna's among geographic populations of the deer mouse, peromyscus maniculatus.
TL;DR: The data presented in this paper are of considerable significance to two different but closely interrelated aspects of mtDNA evolution: the use of restriction endonucleases to measure mitochondrial DNA sequence relatedness in natural populations and the observation that samples from Colorado and southern Michigan were very similar in mtDNA sequence.
Journal ArticleDOI
Callitrichids as phyletic dwarfs, and the place of the callitrichidae in platyrrhini
TL;DR: Two changes in the dentition are shown to be correlated with dwarfing in mammals and it is suggested that Callimico is an “incipient dwarf platyrrhine.”
Book ChapterDOI
The distribution, mechanisms and evolutionary significance of parthenogenesis in oribatid mites
Roy A. Norton,S. C. Palmer +1 more
TL;DR: It is speculated that automixy (meiotic thelytoky) was the process involved — even though some extant species may prove to be secondarily apomictic, just as apomicts evolve from sexually reproducing lineages.