EFFECTS OF FORMULATED FEED ON WATER QUALITY IN FINGERLING WALEYE PRODUCTION PONDS

SARAH E. KAATZ, JOSEPH E. MORRIS

Abstract


Six 0.04-ha plastic-lined ponds were used at the Iowa Department of NaturalResources’ Rathbun Fish Culture and Research Facility to evaluate the use ofsupplemental fish food on walleye (Sander vitreus) fingerling growth and survival,and on the benthic invertebrate community. Walleye were stocked 3-4 days posthatch on 2 May 2003, and harvested 5-6 June 2003. Organic fertilizer (alfalfapellets, 112kg/ha/week) was used to increase primary production and inorganicfertilizers were added periodically to maintain a target nutrient ratio of 7:1 nitratenitrogento total phosphorus (NO3-N: TP). Additional nutrients in the form of LansyCW fish feed were added to three of the six ponds. The objective of this project wasto determine the effect of a commercial fish diet on water quality. At the end of theculture season, there were significant differences between water chemistryparameters in the ponds; the feed treatments had higher levels of nitrogenouscompounds and total phosphorus.

Keywords


walleye; feed; water quality

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Scientific Papers Animal Science and Biotechnologies publish open access articles under the terms of the Creative Commons Attribution 4.0 Licence (read full legal code).


LUCRARI STIINTIFICE ZOOTEHNIE SI BIOTEHNOLOGII (SCIENTIFIC PAPERS ANIMAL SCIENCE AND BIOTECHNOLOGIES)

ISSN print 1841 - 9364
ISSN online 2344 - 4576
ISSN-L  1841 - 9364
(former ISSN 1221-5287, E-ISSN 1841-9364)

PUBLISHER: AGROPRINT Timisoara, Romania
PAPER ACCESS: Full text articles available for free
FREQUENCY: Semiannual
PUBLICATION LANGUAGE: English
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Banat´s University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timisoara
Bioengineering Faculty of Animal Resources
300645, Timişoara, Calea Aradului 119, Romania

E-mail: spasb [at] animalsci-tm.ro
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