Editing Fish farming (section)

=== Classic fry farming ===
This is also called a "flow through system".<ref>{{cite web|url=http://dnr.wi.gov/org/caer/cea/assistance/aquaculture/info.htm |title=Aquaculture |access-date=30 January 2016 |url-status=dead |archive-url=https://web.archive.org/web/20120106204931/http://dnr.wi.gov/org/caer/cea/assistance/aquaculture/info.htm |archive-date=January 6, 2012 }}</ref> Trout and other sport fish are often raised from eggs to [[Spawn (biology)#Fry|fry]] or fingerlings and then trucked to streams and released. Normally, the fry are raised in long, shallow, concrete tanks, fed with fresh stream water. The fry receive commercial fish food in pellets. While not as efficient as the New Alchemists' method, it is also far simpler and has been used for many years to stock streams with sport fish. European eel (''[[Anguilla anguilla]]'') aquaculturalists procure a limited supply of glass eels, juvenile stages of the European eel which swim north from the [[Sargasso Sea]] breeding grounds, for their farms. The European eel is threatened with extinction because of the excessive catch of glass eels by Spanish fishermen and overfishing of adult eels in, e.g., the Dutch [[IJsselmeer]]. Although European eel larvae can survive for several weeks, the full life cycle has not yet been achieved in captivity.<ref>{{Cite journal |last1=Jéhannet |first1=Pauline |last2=Palstra |first2=Arjan P. |last3=Heinsbroek |first3=Leon T. N. |last4=Kruijt |first4=Leo |last5=Dirks |first5=Ron P. |last6=Swinkels |first6=William |last7=Komen |first7=Hans |date=2021-06-08 |title=What Goes Wrong during Early Development of Artificially Reproduced European Eel Anguilla anguilla? Clues from the Larval Transcriptome and Gene Expression Patterns |journal=Animals |volume=11 |issue=6 |pages=1710 |doi=10.3390/ani11061710 |issn=2076-2615 |pmc=8227761 |pmid=34201077|doi-access=free }}</ref>