{"id":{"repo_id":"sdstate","oai_identifier":"oai:openprairie.sdstate.edu:etd-1169"},"canonical_url":"https://search.dev.ndltd.org/etd/sdstate/oai:openprairie.sdstate.edu:etd-1169","repository":{"repo_id":"sdstate","name":"South Dakota State University","base_url":"https://openprairie.sdstate.edu/do/oai/"},"display":{"title":"Rainbow Trout Cage Culture Utilizing Different Strains, Stocking Densities, and Feeding Methods in Eastern South Dakota Dugout Ponds","abstract":"Rainbow trout (Salmo gairdneri) cage culture techniques were investigated in dugouts as part of a continuing program to evaluate the potential of small-scale, landowner-based aquaculture operations. Trout raised in the study did not reach a marketable size (200 g) due to the short growing season and small size at stocking. No significant (P >0.05) differences in growth were detected between stocking densities of 60, 80, 100, and 120 fish/m³. Demand feeding resulted in significantly greater length (P≤0.01), weight (P≤0.01), and relative weight (P≤0.05) than hand feeding in both years tested. Rainbow trout of the Hildebrand strain reached a significantly greater (P≤0.01) length, weight, and relative weight than those of the Growth or Kamloops strains. Hildebrand strain rainbow trout also had significantly (P≤0.01) better food conversion ratios than the other two strains. Due to the short growing season it is not economically feasible to raise rainbow trout in eastern South Dakota dugouts at this time. It is recommended that further trout culture work be centered on more heat tolerant strains.","abstract_html":"Rainbow trout (Salmo gairdneri) cage culture techniques were investigated in dugouts as part of a continuing program to evaluate the potential of small-scale, landowner-based aquaculture operations. Trout raised in the study did not reach a marketable size (200 g) due to the short growing season and small size at stocking. No significant (P &gt;0.05) differences in growth were detected between stocking densities of 60, 80, 100, and 120 fish/m³. Demand feeding resulted in significantly greater length (P≤0.01), weight (P≤0.01), and relative weight (P≤0.05) than hand feeding in both years tested. Rainbow trout of the Hildebrand strain reached a significantly greater (P≤0.01) length, weight, and relative weight than those of the Growth or Kamloops strains. Hildebrand strain rainbow trout also had significantly (P≤0.01) better food conversion ratios than the other two strains. Due to the short growing season it is not economically feasible to raise rainbow trout in eastern South Dakota dugouts at this time. It is recommended that further trout culture work be centered on more heat tolerant strains.","abstract_has_math":false,"creators":["Maher, Jay Patrick"],"institution":null,"degree_name":"Master of Science (MS)","degree_level":"Thesis - Open Access","degree_discipline":"Wildlife and Fisheries Science","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1987,"date_issued":"1987-01-01T08:00:00Z","date_published":"1987-01-01T08:00:00Z","updated_at":"2026-07-24T04:27:36Z","subjects":["Natural Resources and Conservation"],"languages":["en"],"rights":["<p>No Copyright - Non-Commercial Use Only<br /><a href=\"http://rightsstatements.org/vocab/InC-EDU/1.0/\">http://rightsstatements.org/vocab/NoC-NC/1.0/</a></p>"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://openprairie.sdstate.edu/etd/169","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Maher, Jay Patrick"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"thesis:degree_discipline","label":"Discipline","values":["Wildlife and Fisheries Science"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis - Open Access"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science (MS)"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Natural Resources and Conservation"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["<p>No Copyright - Non-Commercial Use Only<br /><a href=\"http://rightsstatements.org/vocab/InC-EDU/1.0/\">http://rightsstatements.org/vocab/NoC-NC/1.0/</a></p>"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://openprairie.sdstate.edu/etd/169"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Rainbow trout (Salmo gairdneri) cage culture techniques were investigated in dugouts as part of a continuing program to evaluate the potential of small-scale, landowner-based aquaculture operations. Trout raised in the study did not reach a marketable size (200 g) due to the short growing season and small size at stocking. No significant (P >0.05) differences in growth were detected between stocking densities of 60, 80, 100, and 120 fish/m³. Demand feeding resulted in significantly greater length (P≤0.01), weight (P≤0.01), and relative weight (P≤0.05) than hand feeding in both years tested. Rainbow trout of the Hildebrand strain reached a significantly greater (P≤0.01) length, weight, and relative weight than those of the Growth or Kamloops strains. Hildebrand strain rainbow trout also had significantly (P≤0.01) better food conversion ratios than the other two strains. Due to the short growing season it is not economically feasible to raise rainbow trout in eastern South Dakota dugouts at this time. It is recommended that further trout culture work be centered on more heat tolerant strains."]},{"key":"dc:title","label":"Title","values":["Rainbow Trout Cage Culture Utilizing Different Strains, Stocking Densities, and Feeding Methods in Eastern South Dakota Dugout Ponds"]}]}],"canonical_facts":{"dc:creator":["Maher, Jay Patrick"],"dc:description.abstract":["Rainbow trout (Salmo gairdneri) cage culture techniques were investigated in dugouts as part of a continuing program to evaluate the potential of small-scale, landowner-based aquaculture operations. Trout raised in the study did not reach a marketable size (200 g) due to the short growing season and small size at stocking. No significant (P >0.05) differences in growth were detected between stocking densities of 60, 80, 100, and 120 fish/m³. Demand feeding resulted in significantly greater length (P≤0.01), weight (P≤0.01), and relative weight (P≤0.05) than hand feeding in both years tested. Rainbow trout of the Hildebrand strain reached a significantly greater (P≤0.01) length, weight, and relative weight than those of the Growth or Kamloops strains. Hildebrand strain rainbow trout also had significantly (P≤0.01) better food conversion ratios than the other two strains. Due to the short growing season it is not economically feasible to raise rainbow trout in eastern South Dakota dugouts at this time. It is recommended that further trout culture work be centered on more heat tolerant strains."],"dc:identifier":["https://openprairie.sdstate.edu/etd/169"],"dc:language":["en"],"dc:rights":["<p>No Copyright - Non-Commercial Use Only<br /><a href=\"http://rightsstatements.org/vocab/InC-EDU/1.0/\">http://rightsstatements.org/vocab/NoC-NC/1.0/</a></p>"],"dc:subject":["Natural Resources and Conservation"],"dc:title":["Rainbow Trout Cage Culture Utilizing Different Strains, Stocking Densities, and Feeding Methods in Eastern South Dakota Dugout Ponds"],"thesis:degree_discipline":["Wildlife and Fisheries Science"],"thesis:degree_level":["Thesis - Open Access"],"thesis:degree_name":["Master of Science (MS)"]},"updated_at":"2026-07-24T04:27:36Z"}