Editing Salmon (section)

===Lampreys===
It has been discovered that rivers which have seen a decline or disappearance of anadromous [[lamprey]]s, loss of the lampreys also affects the salmon in a negative way. Like salmon, anadromous lampreys stop feeding and die after spawning, and their decomposing bodies release nutrients into the stream. Also, along with species like [[rainbow trout]] and [[Sacramento sucker]], lampreys clean the gravel in the rivers during spawning.<ref>{{cite web | date = 19 January 2010 | title = Yuba River Steelhead Redd Surveys (preliminary draft) | url = http://www.yubaaccordrmt.com/Study%20Protocols/Steelhead%20Redd%202010%20Study%20Plan%201-19-10%20(deepwater%20strikeout).pdf | archive-url = https://web.archive.org/web/20180429222315/http://www.yubaaccordrmt.com/Study%20Protocols/Steelhead%20Redd%202010%20Study%20Plan%201-19-10%20(deepwater%20strikeout).pdf | archive-date = 29 April 2018 | url-status = live | publisher =  Yuba River Management Team (RMT) Web Site, Yuba County Water Agency }}</ref> Their larvae, called ammocoetes, are [[filter feeder]]s which contribute to the health of the waters. They are also a food source for the young salmon, and being fattier and oilier, it is assumed predators prefer them over salmon offspring, taking off some of the predation pressure on smolts.<ref>{{cite news | title = Elder's devotion to ugly fish lives on after his tragic death | date = 20 August 2014 | url = http://america.aljazeera.com/articles/2014/8/20/save-the-lampreyelmercrow.html | work = Al Jazeera America | archive-url = https://web.archive.org/web/20181116074100/http://america.aljazeera.com/articles/2014/8/20/save-the-lampreyelmercrow.html | archive-date = 16 November 2018 | url-status = live}}</ref>{{Unreliable source? | date = May 2019}} Adult lampreys are also the preferred prey of seals and sea lions, which can eat 30 lampreys to every salmon, allowing more adult salmon to enter the rivers to spawn without being eaten by the marine mammals.<ref>
{{cite news | title = Pacific Lamprey's Big Year | date = 18 June 2017 | url = http://kymkemp.com/2017/06/18/pacific-lampreys-big-year/ | work = Redheaded Blackbelt | archive-url = https://web.archive.org/web/20181116062430/http://kymkemp.com/2017/06/18/pacific-lampreys-big-year/ | archive-date = 16 November 2018 | url-status = live}}</ref><ref>
{{cite web | year = 2014 | title = A Primeval Marvel | url = http://terra.oregonstate.edu/files/2014/01/Terra-all-pages-single.pdf | work = terra | publisher = Oregon State University | volume = 9 | number = 2 | archive-url = https://web.archive.org/web/20180503042128/http://terra.oregonstate.edu/files/2014/01/Terra-all-pages-single.pdf | archive-date = 3 May 2018 | url-status = live}}</ref>