Results 181 to 190 of about 26,995 (218)

Sympatric speciation revealed by genome-wide divergence in the blind mole ratSpalax [PDF]

Proceedings of the National Academy of Sciences of the United States of America, 2015
Wei Hong, Hengwu Jiao, Guo-Dong Wang
exaly   +2 more sources

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Sympatric speciation by sexual selection

Nature, 1999
There is increasing evidence for the process of sympatric speciation, in which reproductive isolation of species occurs without physical isolation. Theoretical models have focused on disruptive natural selection as the crucial pressure for splitting a species.
M, Higashi, G, Takimoto, N, Yamamura
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WAITING FOR SYMPATRIC SPECIATION

Evolution, 2004
While it now appears likely that sympatric speciation is possible, its generality remains contentious. If it really is rare, then most natural populations must not fit the assumptions of sympatric speciation theory. A better understanding of these assumptions may help identify when sympatric speciation is or is not likely.
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The Maynard Smith model of sympatric speciation

Journal of Theoretical Biology, 2006
The paper entitled "Sympatric speciation," which was published by John Maynard Smith in 1966, initiated the development of mathematical models aiming to identify the conditions for sympatric speciation. A part of that paper was devoted to a specific two-locus, two-allele model of sympatric speciation in a population occupying a two-niche system ...
Sergey Gavrilets
exaly   +3 more sources

Evolution, Sympatric Speciation, and Risk Aversion

2020 IEEE Symposium Series on Computational Intelligence (SSCI), 2020
Speciation is a crucial topic in the biological sciences. Knowledge of this process helps explain the diversity of life. In the computational realm, considerable efforts have been made to understand mechanisms and conditions that lead to speciation. Speciation has profound implications for artificial life, evolutionary computation, and evolutionary ...
Oluwatobi I. Ajagbe, Dean Frederick Hougen   +1 more
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A new approach to sympatric speciation

Trends in Ecology & Evolution, 1987
Sympatric speciation has always been a controversial issue. Recently, the debate has centred around the possibility that host race formation in phytophagous insects occurs as a first stage in this process. Now a new approach to host race formation - examining the population genetics of performance on alternative hosts - is challenging a major ...
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Sympatric speciation in palms on an oceanic island

Nature, 2006
The origin of species diversity has challenged biologists for over two centuries. Allopatric speciation, the divergence of species resulting from geographical isolation, is well documented. However, sympatric speciation, divergence without geographical isolation, is highly controversial. Claims of sympatric speciation must demonstrate species sympatry,
Savolainen, Vincent, Anstett, Marie-Charlotte, Lexer, Christian, Hutton, Ian, Clarkson, James J., Norup, Maria Vibe, Powell, Martyn P., Springate, David, Salamin, Nicholas, Baker, William J.   +9 more
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Sympatric speciation in Galerucella

1994
For decades, the existence and importance of sympatric speciation has remained a controversial issue in speciation research. Very strong opinions exist according to which sympatric speciation could, at most, be a rarely occurring exception, restricted to special types of situations, such as shifts in host preference by herbivorous insects (e.g., Mayr ...
Christina Nokkala, Seppo Nokkala
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Refining the conditions for sympatric ecological speciation

Journal of Evolutionary Biology, 2012
AbstractCan speciation occur in a single population when different types of resources are available, in the absence of any geographical isolation, or any spatial or temporal variation in selection? The controversial topics of sympatric speciation and ecological speciation have already stimulated many theoretical studies, most of them agreeing on the ...
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Parallel speciation: a key to sympatric divergence

Trends in Ecology & Evolution, 2001
Until recently, our view of speciation was that reproductive isolation evolves during long periods of allopatry through the accumulation of genetic differences that result in genetic incompatibility. This view now contrasts with new findings that characters affecting reproductive isolation can diverge rapidly in sympatry as a result of natural ...
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