Editing Fish farming (section)

=== Extensive aquaculture ===
{{See also|Extensive farming}}
Extensive aquaculture relies on small or no external inputs of labour and [[Animal feed|feed]], compared to what is being produced. The fish are usually kept in natural [[Body of water|bodies of water]] or artificial ponds and are left to [[Reproduction|reproduce]] and feed without much intervention, surviving on the natural resources of where they are kept.<ref>{{Cite web |last1=Allen |first1=P.J |last2=Steeby |first2=J.A |date=2011 |title=Aquaculture: Challenges and Promise |url=https://www.nature.com/scitable/knowledge/library/aquaculture-challenges-and-promise-23690921/ |access-date=22 April 2025}}</ref><ref>{{Cite web |last=staff |first=Editorial |date=2024-10-01 |title=Fish farms, differences between intensive, extensive and semi-extensive |url=https://www.bluelifehub.com/2024/10/01/fish-farms-differences-between-intensive-extensive-and-semi-extensive/ |access-date=2025-04-22 |website=Blue Life Hub |language=en-GB}}</ref> This sort of aquaculture is the oldest, and most likely originated in [[China]] around 4000 years ago.<ref>{{Cite web |title=4. AQUACULTURE METHODS AND PRACTICES: A SELECTED REVIEW |url=https://www.fao.org/4/T8598E/t8598e05.htm#4.1%20historical%20perspective |access-date=2025-04-22 |website=www.fao.org}}</ref> 

Due to this type of aquaculture usually requiring large bodies of water, lakes and ponds may be converted to fish farms. This can pose a threat to local enviroments, both in terms of the habitats of local species being [[Habitat destruction|destroyed]], and [[invasive species]] being introduced.<ref>{{Cite web |title=Aquaculture |url=https://biology.kenyon.edu/stures/Compsnelson/Aquaculturepage.htm |access-date=2025-04-22 |website=biology.kenyon.edu}}</ref>
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