scholarly journals Evolution of reproductive isolation as a by-product of divergent life-history evolution in laboratory populations ofDrosophila melanogaster

2012 ◽  
Vol 2 (12) ◽  
pp. 3214-3226 ◽  
Author(s):  
Shampa M. Ghosh ◽  
Amitabh Joshi
Keyword(s):  
Life History ◽  
Reproductive Isolation ◽  
Life History Evolution ◽  
Laboratory Populations ◽  
History Evolution

scholarly journals Ageing and immortality

2000 ◽  
Vol 355 (1403) ◽  
pp. 1657-1662 ◽  
Author(s):  
Michael R. Rose ◽  
Laurence D. Mueller
Keyword(s):  
Life History ◽  
Natural Selection ◽  
Survival Data ◽  
Life History Evolution ◽  
Late Life ◽  
Mortality Rates ◽  
Laboratory Populations ◽  
Phases Of Development ◽  
History Evolution

The concept of the force of natural selection was developed to explain the evolution of ageing. After ageing, however, comes a period in which mortality rates plateau and some individual organisms could, in theory, live forever. This late–life immortality has no presently agreed upon explanation. Two main theories have been offered. The first is heterogeneity within ageing cohorts, such that only extremely robust individuals survive ageing. This theory can be tested by comparisons of more and less robust cohorts. It can also be tested by fitting survival data to its models. The second theory is that late–life plateaus in mortality reflect the inevitable late–life plateau in the force of natural selection. This theory can be tested by changing the force of natural selection in evolving laboratory populations, particularly the age at which the force plateaus. This area of research has great potential for elucidating the overall structure of life–history evolution, particularly the interrelationship between the three life–history phases of development, ageing and immortality.

scholarly journals Gene Trees versus Species Trees: Reassessing Life-History Evolution in a Freshwater Fish Radiation

2010 ◽  
Vol 59 (5) ◽  
pp. 504-517 ◽  
Author(s):  
Jonathan M. Waters ◽  
Diane L. Rowe ◽  
Christopher P. Burridge ◽  
Graham P. Wallis
Keyword(s):  
Life History ◽  
Freshwater Fish ◽  
Life History Evolution ◽  
Gene Trees ◽  
Species Trees ◽  
History Evolution

scholarly journals Life‐history evolution in the anthropocene: effects of increasing nutrients on traits and trade‐offs

2015 ◽  
Vol 8 (7) ◽  
pp. 635-649 ◽  
Author(s):  
Emilie Snell‐Rood ◽  
Rickey Cothran ◽  
Anne Espeset ◽  
Punidan Jeyasingh ◽  
Sarah Hobbie ◽  
...  
Keyword(s):  
Life History ◽  
Life History Evolution ◽  
Trade Offs ◽  
History Evolution

Meristem allocation and life-history evolution in herbaceous plants

2006 ◽  
Vol 84 (1) ◽  
pp. 143-150 ◽  
Author(s):  
Stephen P. Bonser ◽  
Lonnie W. Aarssen
Keyword(s):  
Life History ◽  
Apical Dominance ◽  
Reproductive Effort ◽  
Life History Evolution ◽  
Meristem Development ◽  
Vegetative Traits ◽  
History Evolution ◽  
Meristem Allocation ◽  
Branching Intensity ◽  
Iteroparous Species

Generalisations of life histories in plants are often framed in terms of allocation to reproduction. For example, relative allocation to reproduction is commonly found to be higher in semelparous than in iteroparous plant species. However, the association between vegetative traits and life history has been largely unexplored. In higher plants, reproductive and vegetative function can be measured in terms of meristem allocation. Under this approach, two vegetative traits (apical dominance (the suppression of axillary meristem development) and branching intensity (the commitment of axillary meristems to branches)) can be measured as well as one reproductive trait (reproductive effort). We used phylogenetically independent contrasts to compare reproductive and vegetative function in annual semelparous and perennial iteroparous species. Twenty congeneric species pairs (each species pair represented by one semelparous and one iteroparous species) across nine families were selected based on availability of herbarium specimens. Semelparous life-history evolution was associated with higher reproductive effort. Conversely, iteroparous life-history evolution was associated with higher apical dominance. Branching intensity was not associated with life history. An evolutionary association between life history and apical dominance but not branching intensity suggests a complex relationship between allocation to vegetative traits and the evolution of plant strategies across environments.

"A New View of Life-History Evolution"?: A Response

Oikos ◽  
1982 ◽  
Vol 38 (1) ◽  
pp. 118 ◽  
Author(s):  
William J. Etges
Keyword(s):  
Life History ◽  
Life History Evolution ◽  
History Evolution ◽  
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