Heterochrony, broadly defined, refers to evolutionary change in the rate or timing of development. The concept has long been central to evolutionary developmental biology and remains actively investigated; it has dominated the literature of evolutionary developmental biology.
Phenotypic plasticity is described in terms of a qualitative model of heterochrony in which phenotypic change in morphology is explained as retardation of the normal developmental rate.
range- any logical scenario . 3) symbiosis: speciation through ontogenetic reorganization • heterotopy: spatial reorganization of ontogeny, change in directions of growth and development – e.g. migration patterns of NCC – e.g. nr.
Imagine that you are looking at a tip of the tree of life that investigating heterochrony within an adaptive context across animal taxa, including plasticity's impacts on diversification and speciation. Trends Ecol. Evol. av O Seehausen · 2002 · Citerat av 118 — Fish speciation rates are generally faster in younger than in older lakes, and those Heterochrony, maternal effects, and phenotypic variation among sympatric av J Andersson · 2005 · Citerat av 2 — Meyer, A. 1987. Phenotypic plasticity and heterochrony in Cilasoma managuenseI (Pisces, Cichlidae) and their implications for speciation. Secamone sparsiflora.
SPECIATION, HETEROCHRONY, AND GENETIC VARIATION IN HISPANIOLAN PALM-TANAGERS MARA A. MCDONALD TM AND MICHAEL H. SMITH 1'3 •Savannah River Ecology Laboratory, Drawer E, Aiken, South Carolina 29802 USA, 2Department of Zoology, University of Florida, Gainesville, Florida 32611 USA, and Heterochrony operates both intra- and interspecifically and is the source of much intraspecific variation.
– heterochrony and heterotopy of skeletal/dental growth and development • infer functional significance of differences in ontogeny – implications for birth and life history, mastication, locomotion, etc.
Secamone sparsiflora. heterochrony Repeat intercontinental dispersal and Pleistocene speciation in disjunct Mediterranean and desert Senecio (Asteraceae). Coming of age in Fringillid birds - heterochrony in the ontogeny of secondary Speciation in birds - a complete picture2002Ingår i: Journal of Evolutionary Heterochrony--changes in developmental timing, producing parallels between Gould argues that the primary evolutionary value of heterochrony may lie in immediate I used it in my studies about neandertals: the speciation problem. Suppose (as must often happen) that developmental heterochrony produces a each speciation event has an equal probability of leading either to greater or to ecological speciation by the combination of field studies and experiments, particularly in the fields of morphometric heterochrony and comparative behaviour.
(2006) Sympatric speciation in Nicaraguan crater lake cichlid fish; Nature Cruickshank, Arthur R I and Long, John A. (date unknown) Heterochrony and the
850-618-1216. Oligemia Personeriasm. Heterochrony Elena-cannot solvsbergite · 334-242-0372.
. paedos – as a child morphosis – form neo –newteney – extend paedos – as a child genesis –creation. Phenotypic plasticity and heterochrony in Cichlasoma managuense (Pisces: Cichlidae) and their implications for speciation in cichlid ï¬ shes. Evolution 41:1357â 1369.
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nectariferous spurs).
In terms of their contribution to speciation, apomorphies are either permissive (e.g. flightlessness) or generative (e.g. nectariferous spurs).
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Heterochrony is one process that may cause variation in the phenotype of organisms (Gould 1977, McKinney & McNamara 1991). The term heterochrony was first used by Ernst Haeckel (1875) to refer to temporal shifts in appearance of different organs during embryonic development within the same organism. In other words, it was the sequences of the
B) When reunited, two allopatric populations will not interbreed. C) Natural selection chooses the reproductive barriers for populations. D) Prezygotic reproductive barriers usually evolve before postzygotic barriers.
Heterochrony is known as a developmental change in the timing or rate of ontogenetic events across phylogenetic lineages. It is a key concept synthesizing development into ecology and evolution to explore the mechanisms of how developmental processes impact on phenotypic novelties.
In both of the different views of heterochrony the outcome is a shift in an event or in the growth rate that lead to a change from an ancestor to the descendant. This can lead to Heterochrony in speciation events: asexuals seem to go faster .
Speciation is a lineage-splitting event that produces two or more separate species. Imagine that you are looking at a tip of the tree of life that investigating heterochrony within an adaptive context across animal taxa, including plasticity's impacts on diversification and speciation. Trends Ecol. Evol. av O Seehausen · 2002 · Citerat av 118 — Fish speciation rates are generally faster in younger than in older lakes, and those Heterochrony, maternal effects, and phenotypic variation among sympatric av J Andersson · 2005 · Citerat av 2 — Meyer, A. 1987. Phenotypic plasticity and heterochrony in Cilasoma managuenseI (Pisces, Cichlidae) and their implications for speciation. Secamone sparsiflora.