{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/98341"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/98341","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Foraging of juvenile crappies in turbidity: the difference is black and white","abstract":"Environmental conditions like turbidity can fluctuate rapidly during the early life of fishes and can impact foraging behaviors, and thus growth and survival. Black (Pomoxis nigromaculatus) and white (P. annularis) crappies have been hypothesized to respond strongly and distinctly to changes in turbidity, with black crappies often thought to respond more negatively than white crappies. To compare effects of three representative turbidity levels (0, 25, and 50 NTU) on juvenile crappie foraging, controlled experiments were used to quantify 1) overall consumption and size selectivity of a single prey type (Daphnia) and 2) prey type selection, total consumption, and energetic value of diets when three distinct prey types (Daphnia, Chaoborus, and Chironomus) were offered. Unexpectedly, black crappies exhibited universally greater diet biomass than white crappies. Black crappies displayed relatively higher prey consumption and were more size selective of a single prey type, whereas white crappies were less size selective and maintained similar overall consumption with increasing turbidity levels. Both species showed similar selection patterns among three prey types at all turbidity levels, preferring Chaoborus and avoiding Chironomus. However, black crappies also avoided Daphnia, whereas white crappies consumed them without preference. Overall, turbidity did not appear to impair the foraging of juvenile crappies.","abstract_html":"Environmental conditions like turbidity can fluctuate rapidly during the early life of fishes and can impact foraging behaviors, and thus growth and survival. Black (Pomoxis nigromaculatus) and white (P. annularis) crappies have been hypothesized to respond strongly and distinctly to changes in turbidity, with black crappies often thought to respond more negatively than white crappies. To compare effects of three representative turbidity levels (0, 25, and 50 NTU) on juvenile crappie foraging, controlled experiments were used to quantify 1) overall consumption and size selectivity of a single prey type (Daphnia) and 2) prey type selection, total consumption, and energetic value of diets when three distinct prey types (Daphnia, Chaoborus, and Chironomus) were offered. Unexpectedly, black crappies exhibited universally greater diet biomass than white crappies. Black crappies displayed relatively higher prey consumption and were more size selective of a single prey type, whereas white crappies were less size selective and maintained similar overall consumption with increasing turbidity levels. Both species showed similar selection patterns among three prey types at all turbidity levels, preferring Chaoborus and avoiding Chironomus. However, black crappies also avoided Daphnia, whereas white crappies consumed them without preference. Overall, turbidity did not appear to impair the foraging of juvenile crappies.","abstract_has_math":false,"creators":["Andree, Sara Renee"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Natural Res & Env Sciences","degree_department":null,"school":null,"contributors":["Wahl, David H.","Czesny, Sergiusz J.","Yannarell, Anthony C."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2017,"date_issued":"2017-09-29T17:56:30Z","date_published":"2017-09-29T17:56:30Z","updated_at":"2026-07-22T22:24:35Z","subjects":["Foraging","Turbidity","Early ontogeny"],"languages":["en"],"rights":["Copyright 2017 Sara Andree"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/98341","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Wahl, David H.","Czesny, Sergiusz J.","Yannarell, Anthony C."]},{"key":"dc:creator","label":"Author","values":["Andree, Sara Renee"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2017-09-29T17:56:30Z","2017-07-12","2017-08"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Natural Res & Env Sciences"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Foraging","Turbidity","Early ontogeny"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2017 Sara Andree"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/98341"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Environmental conditions like turbidity can fluctuate rapidly during the early life of fishes and can impact foraging behaviors, and thus growth and survival. Black (Pomoxis nigromaculatus) and white (P. annularis) crappies have been hypothesized to respond strongly and distinctly to changes in turbidity, with black crappies often thought to respond more negatively than white crappies. To compare effects of three representative turbidity levels (0, 25, and 50 NTU) on juvenile crappie foraging, controlled experiments were used to quantify 1) overall consumption and size selectivity of a single prey type (Daphnia) and 2) prey type selection, total consumption, and energetic value of diets when three distinct prey types (Daphnia, Chaoborus, and Chironomus) were offered. Unexpectedly, black crappies exhibited universally greater diet biomass than white crappies. Black crappies displayed relatively higher prey consumption and were more size selective of a single prey type, whereas white crappies were less size selective and maintained similar overall consumption with increasing turbidity levels. Both species showed similar selection patterns among three prey types at all turbidity levels, preferring Chaoborus and avoiding Chironomus. However, black crappies also avoided Daphnia, whereas white crappies consumed them without preference. Overall, turbidity did not appear to impair the foraging of juvenile crappies.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2017-09-29 without embargo terms","The student, Sara Andree, accepted the attached license on 2017-07-07 at 10:05.","The student, Sara Andree, submitted this Thesis for approval on 2017-07-07 at 10:31.","This Thesis was approved for publication on 2017-07-12 at 15:19.","DSpace SAF Submission Ingestion Package generated from Vireo submission #11331 on 2017-09-29 at 11:28:23","Made available in DSpace on 2017-09-29T17:56:30Z (GMT). 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Black (Pomoxis nigromaculatus) and white (P. annularis) crappies have been hypothesized to respond strongly and distinctly to changes in turbidity, with black crappies often thought to respond more negatively than white crappies. To compare effects of three representative turbidity levels (0, 25, and 50 NTU) on juvenile crappie foraging, controlled experiments were used to quantify 1) overall consumption and size selectivity of a single prey type (Daphnia) and 2) prey type selection, total consumption, and energetic value of diets when three distinct prey types (Daphnia, Chaoborus, and Chironomus) were offered. Unexpectedly, black crappies exhibited universally greater diet biomass than white crappies. Black crappies displayed relatively higher prey consumption and were more size selective of a single prey type, whereas white crappies were less size selective and maintained similar overall consumption with increasing turbidity levels. Both species showed similar selection patterns among three prey types at all turbidity levels, preferring Chaoborus and avoiding Chironomus. However, black crappies also avoided Daphnia, whereas white crappies consumed them without preference. Overall, turbidity did not appear to impair the foraging of juvenile crappies.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2017-09-29 without embargo terms","The student, Sara Andree, accepted the attached license on 2017-07-07 at 10:05.","The student, Sara Andree, submitted this Thesis for approval on 2017-07-07 at 10:31.","This Thesis was approved for publication on 2017-07-12 at 15:19.","DSpace SAF Submission Ingestion Package generated from Vireo submission #11331 on 2017-09-29 at 11:28:23","Made available in DSpace on 2017-09-29T17:56:30Z (GMT). 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