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Estimates of Food Consumption Rates for Invasive Blue Catfish

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dc.contributor.authorSchmitt, Joseph D.en
dc.contributor.authorHilling, Corbin D.en
dc.contributor.authorOrth, Donald J.en
dc.contributor.departmentFish and Wildlife Conservationen
dc.date.accessioned2021-07-01T14:20:49Zen
dc.date.available2021-07-01T14:20:49Zen
dc.date.issued2021-04-28en
dc.date.updated2021-07-01T14:20:47Zen
dc.description.abstractAs a prolific invasive species, Blue Catfish Ictalurus furcatus threaten native organisms in numerous estuarine and tidal freshwaters along the Atlantic coast of the United States. However, no published estimates of consumption rates are available for Blue Catfish in the scientific literature. This information is critical for development of bioenergetics models or estimation of population-level impacts on native species. Using a combination of field and laboratory studies, we provide the first estimates of daily ration, maximum daily ration, and consumption to biomass ratios for Blue Catfish populations. Ad libitum feeding trials conducted in our laboratory reveal that maximum daily ration in Blue Catfish varies by prey type, temperature, and fish size, with maximal feeding occurring in medium-sized Blue Catfish (500-600 mm total length) and at temperatures >= 15 degrees C. Furthermore, estimates of daily ration were higher for fish prey (Gizzard Shad Dorosoma cepedianum) than for crustacean prey (blue crab Callinectes sapidus). Diel feeding chronologies based on field-collected diet samples from 1,226 Blue Catfish demonstrated river-specific variability in daily ration and maximum daily ration. Blue Catfish daily ration ranged between 2.27% and 5.22% bodyweight per 24 h, while maximum daily ration ranges between 8.56% and 9.37% bodyweight per 24 h. Estimates of consumption to biomass ratios varied by river and Blue Catfish size groupings but range between 2.42 and 3.39, which is similar to other benthic omnivores. This research will inform the assessment of predatory impacts of invasive Blue Catfish in the Chesapeake Bay and beyond as it will enable researchers to estimate predatory impacts through the coupling of population models, food habit information, and consumption rate information (current study).en
dc.description.adminPublic domain – authored by a U.S. government employeeen
dc.description.notesWe thank B. Peoples, J. Emmel, Z. Moran, J. Woodward, A. Mosely, H. Kim, H. Lee, B. Greenlee, J. Odenkirk, R. Willis, K. Johnson, A. Weaver, Y. Jiao, and S. Smith for their assistance over the course of the study. We thank the anonymous reviewers and editors whose comments resulted in a much better manuscript. Data collection was supported by the Virginia Department of Game and Inland Fisheries through a Sport Fish Restoration Grant from the U.S. Fish and Wildlife Service (contract #2012-13705), and the senior author was partially supported through a fellowship from Virginia Sea Grant (R/71856A). Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the United States Government. There is no conflict of interest declared in this article.en
dc.description.sponsorshipVirginia Department of Game and Inland Fisheries through a Sport Fish Restoration Grant from the U.S. Fish and Wildlife Service [2012-13705]; Virginia Sea Grant [R/71856A]en
dc.description.versionPublished versionen
dc.format.extent12 page(s)en
dc.format.mimetypeapplication/pdfen
dc.identifiertafs.10300 (Article number)en
dc.identifier.doihttps://doi.org/10.1002/tafs.10300en
dc.identifier.eissn1548-8659en
dc.identifier.issn0002-8487en
dc.identifier.orcidOrth, Donald [0000-0002-9236-0147]en
dc.identifier.urihttp://hdl.handle.net/10919/104082en
dc.language.isoenen
dc.publisherWileyen
dc.relation.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000645043000001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=930d57c9ac61a043676db62af60056c1en
dc.rightsPublic Domainen
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/en
dc.subjectLife Sciences & Biomedicineen
dc.subjectFisheriesen
dc.subjectMAXIMUM DAILY CONSUMPTIONen
dc.subjectFRESH-WATER FISHen
dc.subjectDAILY RATIONen
dc.subjectICTALURUS-FURCATUSen
dc.subjectFLATHEAD CATFISHen
dc.subjectCHANNEL CATFISHen
dc.subjectFEEDING ECOLOGYen
dc.subjectTEMPERATUREen
dc.subjectDIETen
dc.subjectBIOENERGETICSen
dc.subject0704 Fisheries Sciencesen
dc.subjectFisheriesen
dc.titleEstimates of Food Consumption Rates for Invasive Blue Catfishen
dc.title.serialTransactions of the American Fisheries Societyen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.otherArticleen
dc.type.otherEarly Accessen
dc.type.otherJournalen
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/Natural Resources & Environmenten
pubs.organisational-group/Virginia Tech/Natural Resources & Environment/Fish and Wildlife Conservationen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Natural Resources & Environment/CNRE T&R Facultyen

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