Editing Tide (section)

=== Biological rhythms ===
The approximately 12-hour and fortnightly tidal cycle has large effects on intertidal<ref>{{cite journal |last1=Bos |first1=A.R. |last2=Gumanao |first2=G.S. |last3=van Katwijk |first3=M.M. |last4=Mueller |first4=B. |last5=Saceda |first5=M.M. |last6=Tejada |first6=R.P. |name-list-style=amp |date=2011 |title=Ontogenetic habitat shift, population growth, and burrowing behavior of the Indo-Pacific beach star ''Archaster typicus'' (Echinodermata: Asteroidea) |journal=[[Marine Biology (journal)|Marine Biology]] |volume=158 |issue=3 |pages=639–648 |doi=10.1007/s00227-010-1588-0 |pmid=24391259 |pmc=3873073|bibcode=2011MarBi.158..639B }}</ref> and marine organisms.<ref>{{cite journal |last1=Bos |first1=A.R. |last2=Gumanao |first2=G.S. |name-list-style=amp |date=2012 |title=The lunar cycle determines availability of coral reef fishes on fish markets |journal=[[Journal of Fish Biology]] |volume=81 |issue=6 |pages=2074–2079 |doi=10.1111/j.1095-8649.2012.03454.x |pmid=23130702|bibcode=2012JFBio..81.2074B }}</ref> Hence their [[biological rhythm]]s tend to occur in rough multiples of these periods.<ref>{{Cite book |last=Naylor |first=Ernest |url=https://books.google.com/books?id=7zLqjQlzM60C |title=Chronobiology of Marine Organisms |date=2010-02-04 |publisher=[[Cambridge University Press]] |isbn=978-1-139-48494-7 |language=en |chapter=Chapter 5: Lunar and semilunar biorhythms |via=[[Google Books]] |access-date=2022-01-03 |archive-date=2023-09-16 |archive-url=https://web.archive.org/web/20230916153532/https://books.google.com/books?id=7zLqjQlzM60C |url-status=live }}</ref> Many other animals such as the [[vertebrate]]s, display similar circatidal rhythms.<ref>{{Cite journal |last1=Zhu |first1=Bokai |last2=Dacso |first2=Clifford C. |last3=O'Malley |first3=Bert W. |date=2018-07-01 |title=Unveiling "Musica Universalis" of the Cell: A Brief History of Biological 12-Hour Rhythms |url=https://doi.org/10.1210/js.2018-00113 |journal=[[Journal of the Endocrine Society]] |volume=2 |issue=7 |pages=727–752 |doi=10.1210/js.2018-00113 |pmid=29978151 |pmc=6025213 |issn=2472-1972 |access-date=2022-01-03 |archive-date=2023-09-16 |archive-url=https://web.archive.org/web/20230916153533/https://academic.oup.com/jes/article/2/7/727/5033317 |url-status=live }}</ref> Examples include [[gestation]] and egg hatching. In humans, the [[menstrual cycle]] lasts roughly a [[lunar month]], an even multiple of the tidal period. Such parallels at least hint at the [[common descent]] of all animals from a marine ancestor.<ref name=Descent>{{cite book |last=Darwin |first=Charles |author-link=Charles Darwin |date=1871 |title=[[The Descent of Man, and Selection in Relation to Sex]] |publisher=John Murray |location=London}}</ref>