Fecundity: Difference between revisions
Suppressing link to the 2nd edition because wikipedia complained having link in the work= item. |
Added contrast with fertility, copied fromfertility article |
||
| Line 1: | Line 1: | ||
In [[demography]] and [[biology]], '''fecundity''' is the ''actual'' reproductive rate of an [[organism]] or [[population]], measured by the number of [[gamete]]s (eggs), seed set, or asexual propagules. Fecundity is similar to [[fertility]] |
In [[demography]] and [[biology]], '''fecundity''' is the ''actual'' reproductive rate of an [[organism]] or [[population]], measured by the number of [[gamete]]s (eggs), seed set, or asexual propagules. Fecundity is similar to [[fertility]],<ref>{{cite web |
||
| url = http://en-ii.demopaedia.org/wiki/Fecundity |
| url = http://en-ii.demopaedia.org/wiki/Fecundity |
||
| title = Fecundity |
| title = Fecundity |
||
| Line 17: | Line 17: | ||
| page = [http://en-i.demopaedia.org/wiki/62#621 621-1] |
| page = [http://en-i.demopaedia.org/wiki/62#621 621-1] |
||
| accessdate = 8 February 2010 |
| accessdate = 8 February 2010 |
||
}}</ref> the natural capability to produce offspring. A lack of fertility is [[infertility]] while a lack of fecundity would be called [[Sterility (physiology)|sterility]]. |
|||
| ⚫ | |||
| ⚫ | Demography considers only human fecundity which is often intentionally limited through [[contraception]], while biology studies all organisms. Fecundity is under both [[Genetics|genetic]] and environmental control, and is the major measure of [[Fitness (biology)|fitness]]. ''Fecundation'' is another term for [[fertilization]]. ''Superfecundity'' refers to an organism's ability to store another organism's sperm (after [[copulation]]) and fertilize its own eggs from that store after a period of time, essentially making it appear as though fertilization occurred without sperm (i.e. [[parthenogenesis]]).{{Citation needed|date=October 2009}} |
||
Fecundity is important and well studied in the field of [[population ecology]]. Fecundity can increase or decrease in a [[population]] according to current conditions and certain [[regulating factors]]. For instance, in times of hardship for a population, such as a [[starvation|lack of food]], juvenile and eventually adult fecundity has been shown to decrease (i.e. due to a lack of resources the juvenile individuals are unable to reproduce, eventually the adults will run out of resources and reproduction will cease). |
Fecundity is important and well studied in the field of [[population ecology]]. Fecundity can increase or decrease in a [[population]] according to current conditions and certain [[regulating factors]]. For instance, in times of hardship for a population, such as a [[starvation|lack of food]], juvenile and eventually adult fecundity has been shown to decrease (i.e. due to a lack of resources the juvenile individuals are unable to reproduce, eventually the adults will run out of resources and reproduction will cease). |
||
Revision as of 14:01, 8 January 2016
In demography and biology, fecundity is the actual reproductive rate of an organism or population, measured by the number of gametes (eggs), seed set, or asexual propagules. Fecundity is similar to fertility,[1][2] the natural capability to produce offspring. A lack of fertility is infertility while a lack of fecundity would be called sterility.
Demography considers only human fecundity which is often intentionally limited through contraception, while biology studies all organisms. Fecundity is under both genetic and environmental control, and is the major measure of fitness. Fecundation is another term for fertilization. Superfecundity refers to an organism's ability to store another organism's sperm (after copulation) and fertilize its own eggs from that store after a period of time, essentially making it appear as though fertilization occurred without sperm (i.e. parthenogenesis).[citation needed]
Fecundity is important and well studied in the field of population ecology. Fecundity can increase or decrease in a population according to current conditions and certain regulating factors. For instance, in times of hardship for a population, such as a lack of food, juvenile and eventually adult fecundity has been shown to decrease (i.e. due to a lack of resources the juvenile individuals are unable to reproduce, eventually the adults will run out of resources and reproduction will cease).
Fecundity has also been shown to increase in ungulates with relation to warmer weather.
In sexual evolutionary biology, especially in sexual selection, fecundity is contrasted to reproductivity.
In obstetrics and gynecology, fecundability is the probability of being pregnant in a single menstrual cycle, and fecundity is the probability of achieving a live birth within a single cycle.[3]
See also
References
- ^ Etienne van de Valle (adapted by), from the French section edited by Louis Henry (1982). "Fecundity". Multilingual demographic dictionary, English section, second edition. Demopaedia.org, International Union for the Scientific Study of Population. p. 621-1. Retrieved 8 February 2010.
{{cite web}}:|author=has generic name (help); External link in|publisher= - ^ Eugene Grebenik (1958). "Fecundity". Multilingual demographic dictionary, English section. Prepared by the Demographic Dictionary Committee of the International Union for the Scientific Study of Population. Demopaedia.org, United Nations Department of Economic and Social Affairs (DESA). p. 621-1. Retrieved 8 February 2010.
{{cite web}}: External link in|publisher= - ^ Berek JS and Novak E. Berek & Novak's gynecology. 14th ed. 2007, Philadelphia: Lippincott Williams & Wilkins. Pg. 1186
