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===Reproduction=== [[File:Flying Termites after rain.jpg|thumbnail|alt=Hundreds of winged termite reproductives swarming after a summer rain, filling the field of the photograph.|Alates swarming during nuptial flight after rain|left]] Termite alates (winged virgin queens and kings) only leave the colony when a [[nuptial flight]] takes place. Alate males and females pair up together and then land in search of a suitable place for a colony.<ref name=v2010>{{cite web|last1=Miller|first1=D.M.|title=Subterranean Termite Biology and Behavior|publisher=Virginia Tech (Virginia State University)|access-date=8 January 2015|url=https://pubs.ext.vt.edu/444/444-502/444-502.html|date=5 March 2010}}</ref> A termite king and queen do not mate until they find such a spot. When they do, they excavate a chamber big enough for both, close up the entrance and proceed to mate.<ref name=v2010/> After mating, the pair may never surface again, spending the rest of their lives in the nest. Nuptial flight time varies in each species. For example, alates in certain species emerge during the day in summer while others emerge during the winter.<ref name=Gouge>{{cite web|last1=Gouge|first1=D.H.|last2=Smith|first2=K.A.|last3=Olson|first3=C.|last4=Baker|first4=P.|title=Drywood Termites|url=http://ag.arizona.edu/pubs/insects/az1232/|publisher=University of Arizona|work=Cooperative Extension, College of Agriculture & Life Sciences|access-date=16 September 2015|date=2001|archive-date=10 November 2016|archive-url=https://web.archive.org/web/20161110102210/http://ag.arizona.edu/pubs/insects/az1232/|url-status=dead}}</ref> The nuptial flight may also begin at dusk, when the alates swarm around areas with many lights. The time when nuptial flight begins depends on the environmental conditions, the time of day, moisture, wind speed and precipitation.<ref name=Gouge/> The number of termites in a colony also varies, with the larger species typically having 100–1,000 individuals. However, some termite colonies, including those with many individuals, can number in the millions.<ref name=styria/> The queen only lays 10–20 eggs in the very early stages of the colony, but lays as many as 1,000 a day when the colony is several years old.<ref name=aus/> At maturity, a primary queen has a great capacity to lay eggs. In some species, the mature queen has a greatly distended abdomen and may produce 40,000 eggs a day.<ref>{{cite journal |last1=Kaib |first1=M. |last2=Hacker |first2=M. |last3=Brandl |first3=R. |title=Egg-laying in monogynous and polygynous colonies of the termite ''Macrotermes michaelseni'' (Isoptera, Macrotermitidae)|journal=Insectes Sociaux |date=2001 |volume=48 |issue=3 |pages=231–237 |doi=10.1007/PL00001771|s2cid=35656795 }}</ref> The two mature ovaries may have some 2,000 [[ovariole]]s each.<ref>{{cite book|last1=Gilbert|first1=executive editors, G.A. Kerkut, L.I.|title=Comprehensive insect physiology, biochemistry, and pharmacology |date=1985 |publisher=Pergamon Press |location=Oxford |isbn=978-0-08-026850-7 |page=167 |edition=1st |url=https://books.google.com/books?id=bkTgBAAAQBAJ&q=termite+queen+ovarioles&pg=PA167}}</ref> The abdomen increases the queen's body length to several times more than before mating and reduces her ability to move freely; attendant workers provide assistance. [[File:Egg grooming behaviour of Reticulitermes speratus workers in a nursery cell - pone.0000813.s006.ogv|thumb|alt=In this movie, workers pick eggs from the egg pile, groom them and then return them into the egg pile. They coat the eggs with their saliva to protect them against drying out and to protect them against infection: the saliva contains lyzozyme which has antibacterial properties. The lysozyme also acts as an egg recognition pheromone.|Egg grooming behaviour of ''[[Reticulitermes|Reticulitermes speratus]]'' workers in a nursery cell]]The king grows only slightly larger after initial mating and continues to mate with the queen for life (a termite queen can live between 30 and 50 years); this is very different from ant colonies, in which a queen mates once with the males and stores the gametes for life, as the male ants die shortly after mating.<ref name=Keller1998>{{cite journal |last1=Keller|first1=L.|year=1998 |title=Queen lifespan and colony characteristics in ants and termites |journal=Insectes Sociaux|volume=45|pages=235–246|doi=10.1007/s000400050084|issue=3|s2cid=24541087}}</ref><ref name=Michael/> If a queen is absent, a termite king produces pheromones which encourage the development of replacement termite queens.<ref>{{cite book|last1=Wyatt|first1=T.D.|title=Pheromones and animal behaviour: communication by smell and taste|url=https://archive.org/details/pheromonesanimal0000wyat|url-access=registration|date=2003|publisher=Cambridge University Press|location=Cambridge|isbn=978-0-521-48526-5|page=[https://archive.org/details/pheromonesanimal0000wyat/page/119 119]|edition=Repr. with corrections 2004.}}</ref> As the queen and king are monogamous, sperm competition does not occur.<ref>{{cite journal|last1=Morrow|first1=E.H.|title=How the sperm lost its tail: the evolution of aflagellate sperm.|journal=Biological Reviews of the Cambridge Philosophical Society|date=2004|volume=79|issue=4|pages=795–814|doi=10.1017/S1464793104006451|pmid=15682871|s2cid=25878093}}</ref> Termites going through incomplete metamorphosis on the path to becoming alates form a subcaste in certain species of termite, functioning as potential supplementary reproductives. These supplementary reproductives only mature into primary reproductives upon the death of a king or queen, or when the primary reproductives are separated from the colony.<ref name="uflorida">{{cite web |title=Native subterranean termites |url=http://entnemdept.ufl.edu/creatures/urban/termites/native_subterraneans.htm |access-date=8 January 2015 |publisher=University of Florida}}</ref><ref>{{cite web|title=Supplementary reproductive|url=http://www2.hawaii.edu/~entomol/glossary/definition_supplementary_reproductive.htm|archive-url=https://web.archive.org/web/20141030112432/http://www2.hawaii.edu/~entomol/glossary/definition_supplementary_reproductive.htm |archive-date=30 October 2014|publisher=University of Hawaii|access-date=16 September 2015}}</ref> Supplementaries have the ability to replace a dead primary reproductive, and there may also be more than a single supplementary within a colony.<ref name=aus/> Some queens have the ability to switch from sexual reproduction to [[asexual reproduction]]. Studies show that while termite queens mate with the king to produce colony workers, the queens reproduce their replacements ([[Neoteny|neotenic]] queens) [[Parthenogenesis|parthenogenetically]].<ref>{{cite journal|last1=Yashiro|first1=T.|last2=Matsuura|first2=K.|title=Termite queens close the sperm gates of eggs to switch from sexual to asexual reproduction|journal=Proceedings of the National Academy of Sciences |date=2014 |volume=111 |issue=48 |pages=17212–17217 |doi=10.1073/pnas.1412481111 |pmid=25404335 |pmc=4260566 |bibcode=2014PNAS..11117212Y|doi-access=free}}</ref><ref>{{cite journal |last1=Matsuura |first1=K.|last2=Vargo |first2=E.L.|last3=Kawatsu |first3=K. |last4=Labadie |first4=P. E. |last5=Nakano |first5=H.|last6=Yashiro |first6=T. |last7=Tsuji |first7=K. |title=Queen Succession Through Asexual Reproduction in Termites |journal=Science |date=2009 |volume=323 |issue=5922 |pages=1687 |doi=10.1126/science.1169702 |pmid=19325106 |bibcode=2009Sci...323.1687M|s2cid=21785886}}</ref> The neotropical termite ''Embiratermes neotenicus'' and several other related species produce colonies that contain a primary king accompanied by a primary queen or by up to 200 [[neoteny|neotenic]] queens that had originated through [[thelytoky|thelytokous parthenogenesis]] of a founding primary queen.<ref name="pmid26019158">{{cite journal |vauthors=Fougeyrollas R, Dolejšová K, Sillam-Dussès D, Roy V, Poteaux C, Hanus R, Roisin Y |title=Asexual queen succession in the higher termite Embiratermes neotenicus |journal=Proc. Biol. Sci. |volume=282 |issue=1809 |pages=20150260 |date=June 2015 |pmid=26019158 |pmc=4590441 |doi=10.1098/rspb.2015.0260 }}</ref> The form of [[parthenogenesis]] likely employed maintains [[zygosity|heterozygosity]] in the passage of the [[genome]] from mother to daughter, thus avoiding [[inbreeding depression]].
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