Fitness advantage resulting from the preference of traits that increase the number of offspring .- Fecundity selection
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Differential survival and reproduction of individuals due to differences in phenotype.
Other factors affecting reproductive success include sexual selection (now often included in natural selection) and fecundity selection.
Orb-weaver spiders are members of the spider family Araneidae.
The larger size female is typically thought to be selected through fecundity selection, the idea that bigger females can produce more eggs, thus more offspring.
Science of heredity and variation in living organisms.
Phrase that originated from Darwinian evolutionary theory as a way of describing the mechanism of natural selection.
The biological concept of fitness refers to both reproductive success (fecundity selection), as well as survival (viability selection), and is not prescriptive in the specific ways in which organisms can be more "fit" by having phenotypic characteristics that enhance survival and reproduction (which was the meaning that Spencer had in mind).
Genus of intracellular bacteria that infects mainly arthropod species, including a high proportion of insects, and also some nematodes.
Wolbachia strains captured from 1988 in southern California still induce a fecundity deficit, but nowadays the fecundity deficit is replaced with a fecundity advantage such that infected Drosophila simulans produces more offspring than the uninfected ones.
So much variability in the lifespans of organisms.
"The key conceptual insight that allowed Medawar, Williams, and others, to develop the evolutionary theory of aging is based on the notion that the force of natural selection, a measure of how effectively selection acts on survival rate or fecundity as a function of age, declines with progressive age."
Primitively eusocial orchid bee of the American tropics.
Finally, a mother may eat her daughter's eggs to gain more nutrients, increasing her own longevity and fecundity.
Form of speciation (specifically ecological speciation) arising from reproductive isolation that occurs due to a change in breeding time that reduces or eliminates gene flow between two populations of a species.
Studies of salmonid fishes (involving reproductive lifespans, size at adulthood, age, energy storage, the mass of ovaries, egg sizes, number of eggs in a clutch, fecundity, and rates of development) and flowering plants (involving plant size, duration of flowing time, the number of flowers, the number of fruits, the timing of fruiting, and leaf size) have provided strong evidence of IBT leading to ABT as well as studies of yearly allochrony.