scholarly journals Life history of Xenodexia ctenolepis: implications for life history evolution in the family Poeciliidae

2007 ◽  
Vol 92 (1) ◽  
pp. 77-85 ◽  
Author(s):  
DAVID REZNICK ◽  
TOMAS HRBEK ◽  
SUNNY CAURA ◽  
JAAP DE GREEF ◽  
DEREK ROFF
Keyword(s):  
Life History ◽  
Life History Evolution ◽  
The Family ◽  
History Of ◽  
History Evolution

scholarly journals Repeated loss of variation in insect ovary morphology highlights the role of developmental constraint in life-history evolution

2020 ◽  
Author(s):  
Samuel H. Church ◽  
Bruno A. S. de Medeiros ◽  
Seth Donoughe ◽  
Nicole L. Márquez Reyes ◽  
Cassandra G. Extavour
Keyword(s):  
Life History ◽  
Nurse Cell ◽  
Life History Evolution ◽  
Trade Off ◽  
Offspring Number ◽  
Size Number ◽  
History Of ◽  
Insect Ovary ◽  
Ovariole Number ◽  
History Evolution

AbstractThe number of offspring an organism can produce is a key component of its evolutionary fitness and lifehistory. Here we perform a test of the hypothesized trade off between the number and size of offspring using thousands of descriptions of the number of egg-producing compartments in the insect ovary (ovarioles), a common proxy for potential offspring number in insects. In contrast to prior claims, we find that ovariole number is not generally negatively correlated with the size of insect eggs, and we highlight several factors that may have contributed to this size-number trade off being strongly asserted in previous studies. We reconstruct the evolutionary history of the nurse cell arrangement within the ovariole, and show that the diversification of ovariole number and egg size have both been largely independent of nurse cell presence or position within the ovariole. Instead we show that ovariole number evolution has been shaped by a series of transitions between variable and invariant states, with multiple independent lineages evolving to have almost no variation in ovariole number. We highlight the implications of these invariant lineages on our understanding of the specification of ovariole number during development, as well as the importance of considering developmental processes in theories of life-history evolution.

scholarly journals Life-history evolution in ants: the case of Cardiocondyla

2017 ◽  
Vol 284 (1850) ◽  
pp. 20161406 ◽  
Author(s):  
Jürgen Heinze
Keyword(s):  
Life History ◽  
Life Histories ◽  
Life History Evolution ◽  
Phenotypic Traits ◽  
Wide Range ◽  
Terrestrial Habitats ◽  
Genomic Studies ◽  
History Of ◽  
History Evolution ◽  
Nesting Habits

Ants are important components of most terrestrial habitats, and a better knowledge of the diversity of their life histories is essential to understand many aspects of ecosystem functioning. The myrmicine genus Cardiocondyla shows a wide range of colony structures, reproductive behaviours, queen and male lifespans, and habitat use. Reconstructing the evolutionary pathways of individual and social phenotypic traits suggests that the ancestral life history of Cardiocondyla was characterized by the presence of multiple, short-lived queens in small-sized colonies and a male polyphenism with winged dispersers and wingless fighters, which engage in lethal combat over female sexuals within their natal nests. Single queening, queen polyphenism, the loss of winged males and tolerance among wingless males appear to be derived traits that evolved with changes in nesting habits, colony size and the spread from tropical to seasonal environments. The aim of this review is to bring together the information on life-history evolution in Cardiocondyla and to highlight the suitability of this genus for functional genomic studies of adaptation, phenotypic plasticity, senescence, invasiveness and other key life-history traits of ants.

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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