Editing Fish farming (section)

=== Stocking density ===
Secondly, farmed fish are kept in concentrations never seen in the wild (e.g. 50,000 fish in a {{convert|2|acre|m2|adj=on}} area.<ref>{{cite web|url=http://www.gi.alaska.edu/ScienceForum/ASF9/984.html|title=Fuss over Farming Fish, Alaska Science Forum|access-date=30 January 2016|archive-url=https://web.archive.org/web/20120419072032/http://www2.gi.alaska.edu/ScienceForum/ASF9/984.html|archive-date=2012-04-19|url-status=dead}}</ref>). However, fish tend also to be animals that aggregate into large schools at high density. Most successful aquaculture species are schooling species, which do not have social problems at high density. Aquaculturists feel that operating a rearing system above its design capacity or above the social density limit of the fish will result in decreased growth rate and increased [[feed conversion ratio]] (kg dry feed/kg of fish produced), which results in increased cost and risk of health problems along with a decrease in profits. Stressing the animals is not desirable, but the concept of and measurement of stress must be viewed from the perspective of the animal using the scientific method.<ref>{{cite journal | year = 2006 | title = Current issues in fish welfare| url = http://curis.ku.dk/ws/files/22567895/Review_paper__Current_issues_in_fish_welfare.pdf| journal = Journal of Fish Biology | volume = 68 | issue = 2| pages = 332–372 | doi=10.1111/j.0022-1112.2006.001046.x| last1 = Huntingford| first1 = F. A| last2 = Adams| first2 = C| last3 = Braithwaite| first3 = V. A| last4 = Kadri| first4 = S| last5 = Pottinger| first5 = T. G| last6 = Sandoe| first6 = P| last7 = Turnbull| first7 = J. F| bibcode = 2006JFBio..68..332H| s2cid = 84511123}}</ref>