{"id":{"repo_id":"sdstate","oai_identifier":"oai:openprairie.sdstate.edu:etd-1241"},"canonical_url":"https://search.dev.ndltd.org/etd/sdstate/oai:openprairie.sdstate.edu:etd-1241","repository":{"repo_id":"sdstate","name":"South Dakota State University","base_url":"https://openprairie.sdstate.edu/do/oai/"},"display":{"title":"Food Selectivity of Bigmouth Buffalo (Ictiobus cyprinellus, Valenciennes) in Lake Poinsett, South Dakota","abstract":"Food habits of bigmouth buffalo fry, subadults, and adults were studied in lake Poinsett, South Dakota, from January to November, 1968. Fifty-six fry fed primarily (75.0% by volume) on benthic organisms. Four hundred fifty-five subadults and adults fed entirely on plankton. Daphnia pulex adults comprised 83.7 to 96.7% of the food items during periods of ice cover (January to April). Daphnia pulex adults and juveniles comprised 68.5% by volume and cyclopoid copepods 29.7%^ of the diet from April to July. Summer (July to October) samples showed ingestion of D. pulex adults and juveniles (36.9%), Anacystis sp. (22.3%), and Daphnia galeata mendotae (16.0%). Fall (October) samples showed ingestion of D. Pulex (adults and juveniles) and D. galeata mendotae which totaled 60.9%. Cyclopoid copepods contributed 23.0%. Food selectivity of subadult and adult bigmouth buffalo for eight categories of zooplankton was determined using the index described by Ivlev (1961). Selectively for D. pulex averaged +0.48 for the sampling period. Calanoid copepods were negatively selected for the entire period with a mean of -0.74. The other six categories (Diaphanasoma bryachyurum, Daphnia galeata mendotae, Daphnia pulex juveniles, Bosmina longirostris, Chydorus sphaericus, and cyclopoid copepods) appeared to be taken when available; without selection. Selectivity appeared to be dependent on the morphology of the gill rakers for all organisms except calanoid copepods which appeared to avoid ingestion.","abstract_html":"Food habits of bigmouth buffalo fry, subadults, and adults were studied in lake Poinsett, South Dakota, from January to November, 1968. Fifty-six fry fed primarily (75.0% by volume) on benthic organisms. Four hundred fifty-five subadults and adults fed entirely on plankton. Daphnia pulex adults comprised 83.7 to 96.7% of the food items during periods of ice cover (January to April). Daphnia pulex adults and juveniles comprised 68.5% by volume and cyclopoid copepods 29.7%^ of the diet from April to July. Summer (July to October) samples showed ingestion of D. pulex adults and juveniles (36.9%), Anacystis sp. (22.3%), and Daphnia galeata mendotae (16.0%). Fall (October) samples showed ingestion of D. Pulex (adults and juveniles) and D. galeata mendotae which totaled 60.9%. Cyclopoid copepods contributed 23.0%. Food selectivity of subadult and adult bigmouth buffalo for eight categories of zooplankton was determined using the index described by Ivlev (1961). Selectively for D. pulex averaged +0.48 for the sampling period. Calanoid copepods were negatively selected for the entire period with a mean of -0.74. The other six categories (Diaphanasoma bryachyurum, Daphnia galeata mendotae, Daphnia pulex juveniles, Bosmina longirostris, Chydorus sphaericus, and cyclopoid copepods) appeared to be taken when available; without selection. Selectivity appeared to be dependent on the morphology of the gill rakers for all organisms except calanoid copepods which appeared to avoid ingestion.","abstract_has_math":false,"creators":["Starostka, Victor J."],"institution":null,"degree_name":"Master of Science (MS)","degree_level":"Thesis - Open Access","degree_discipline":"Wildlife Management","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1969,"date_issued":"1969-01-01T08:00:00Z","date_published":"1969-01-01T08:00:00Z","updated_at":"2026-07-24T04:27:44Z","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/241","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Starostka, Victor J."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"thesis:degree_discipline","label":"Discipline","values":["Wildlife Management"]},{"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/241"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Food habits of bigmouth buffalo fry, subadults, and adults were studied in lake Poinsett, South Dakota, from January to November, 1968. Fifty-six fry fed primarily (75.0% by volume) on benthic organisms. Four hundred fifty-five subadults and adults fed entirely on plankton. Daphnia pulex adults comprised 83.7 to 96.7% of the food items during periods of ice cover (January to April). Daphnia pulex adults and juveniles comprised 68.5% by volume and cyclopoid copepods 29.7%^ of the diet from April to July. Summer (July to October) samples showed ingestion of D. pulex adults and juveniles (36.9%), Anacystis sp. (22.3%), and Daphnia galeata mendotae (16.0%). Fall (October) samples showed ingestion of D. Pulex (adults and juveniles) and D. galeata mendotae which totaled 60.9%. Cyclopoid copepods contributed 23.0%. Food selectivity of subadult and adult bigmouth buffalo for eight categories of zooplankton was determined using the index described by Ivlev (1961). Selectively for D. pulex averaged +0.48 for the sampling period. Calanoid copepods were negatively selected for the entire period with a mean of -0.74. The other six categories (Diaphanasoma bryachyurum, Daphnia galeata mendotae, Daphnia pulex juveniles, Bosmina longirostris, Chydorus sphaericus, and cyclopoid copepods) appeared to be taken when available; without selection. Selectivity appeared to be dependent on the morphology of the gill rakers for all organisms except calanoid copepods which appeared to avoid ingestion."]},{"key":"dc:title","label":"Title","values":["Food Selectivity of Bigmouth Buffalo (Ictiobus cyprinellus, Valenciennes) in Lake Poinsett, South Dakota"]}]}],"canonical_facts":{"dc:creator":["Starostka, Victor J."],"dc:description.abstract":["Food habits of bigmouth buffalo fry, subadults, and adults were studied in lake Poinsett, South Dakota, from January to November, 1968. Fifty-six fry fed primarily (75.0% by volume) on benthic organisms. Four hundred fifty-five subadults and adults fed entirely on plankton. Daphnia pulex adults comprised 83.7 to 96.7% of the food items during periods of ice cover (January to April). Daphnia pulex adults and juveniles comprised 68.5% by volume and cyclopoid copepods 29.7%^ of the diet from April to July. Summer (July to October) samples showed ingestion of D. pulex adults and juveniles (36.9%), Anacystis sp. (22.3%), and Daphnia galeata mendotae (16.0%). Fall (October) samples showed ingestion of D. Pulex (adults and juveniles) and D. galeata mendotae which totaled 60.9%. Cyclopoid copepods contributed 23.0%. Food selectivity of subadult and adult bigmouth buffalo for eight categories of zooplankton was determined using the index described by Ivlev (1961). Selectively for D. pulex averaged +0.48 for the sampling period. Calanoid copepods were negatively selected for the entire period with a mean of -0.74. The other six categories (Diaphanasoma bryachyurum, Daphnia galeata mendotae, Daphnia pulex juveniles, Bosmina longirostris, Chydorus sphaericus, and cyclopoid copepods) appeared to be taken when available; without selection. Selectivity appeared to be dependent on the morphology of the gill rakers for all organisms except calanoid copepods which appeared to avoid ingestion."],"dc:identifier":["https://openprairie.sdstate.edu/etd/241"],"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":["Food Selectivity of Bigmouth Buffalo (Ictiobus cyprinellus, Valenciennes) in Lake Poinsett, South Dakota"],"thesis:degree_discipline":["Wildlife Management"],"thesis:degree_level":["Thesis - Open Access"],"thesis:degree_name":["Master of Science (MS)"]},"updated_at":"2026-07-24T04:27:44Z"}