Partial replacement of fishmeal with duckweed (Spirodela polyrhiza) in feed for two carnivorous fish species, Eurasian perch (Perca fluviatilis) and rainbow trout (Oncorhynchus mykiss)

Stadtlander, Timo; Tschudi, Fridolin; Seitz, Andreas; Sigrist, Mathias; Refardt, Dominik; Leiber, Florian

doi:10.1155/2023/6680943

Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-27410

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Partial replacement of fishmeal with duckweed (Spirodela polyrhiza) in feed for two carnivorous fish species, Eurasian perch (Perca fluviatilis) and rainbow trout (Oncorhynchus mykiss)
Authors:	Stadtlander, Timo Tschudi, Fridolin Seitz, Andreas Sigrist, Mathias Refardt, Dominik Leiber, Florian
et. al:	No
DOI:	10.1155/2023/6680943 10.21256/zhaw-27410
Published in:	Aquaculture Research
Volume(Issue):	2023
Issue:	6680943
Issue Date:	2023
Publisher / Ed. Institution:	Hindawi
ISSN:	1365-2109 1355-557X
Language:	English
Subjects:	Duckweed; Protein; Fish meal; Cattle slurry; Eurasian perch; Rainbow trout; Sustainability; Fish feed; Fish meal replacement; Alternative protein; Perca fluviatilis; Oncorhynchus mykiss
Subject (DDC):	639.8: Aquaculture
Abstract:	Two four-week feeding trials were conducted with fingerlings of Eurasian perch (Perca fluviatilis, 3.52 ± 0.08 g) and rainbow trout (Oncorhynchus mykiss, 1.49 ± 0.05 g) fed with graded levels of dried (DWD) and fermented (DWF) duckweed meal (Spirodela polyrhiza). The purpose of these two trials was to evaluate DWD and DWF as replacements for fishmeal. Fishmeal protein was substituted by 12%, 24%, and 35% of duckweed protein and compared to control diets containing 40% (for perch) and 35% (for rainbow trout) fishmeal and no duckweed. The performance of the fish (growth, feed conversion, and protein and lipid utilization) and their whole-body composition were evaluated and compared with the control. While even the lowest inclusion level, regardless of its form (dried or fermented), resulted in significantly reduced performance in Eurasian perch, rainbow trout were able to utilize feed containing duckweed meal considerably well. Compared to the control, at a 12% inclusion level, rainbow trout showed an equal or comparable percent weight gain (PWG; DWD: 377%, DWF: 373%), specific growth rate (SGR; DWD: 4.37%/day, DWF: 4.33%/day), feed conversion ratio (FCR; DWD: 1.11, DWF: 1.12), and protein productive value (PPV; DWD: 21.5%, DWF: 21.2%). Increasing the inclusion levels above 12% of both DWD and DWF resulted in reduced performance in rainbow trout, with the most pronounced effects observed in the DWD35 group. All experimental diets, including control, affected the whole body composition of perch, most notably reducing the lipid content compared to initial fish. Compared to initial, control and DWD rainbow trout increased whole-body protein, lipid, and ash contents. In conclusion, for rainbow trout, fermented and dried S. polyrhiza duckweed meal appears to be a promising feed ingredient when used at a maximum inclusion level of 12%, while for Eurasian perch, it should not be considered as a feed ingredient.
URI:	https://digitalcollection.zhaw.ch/handle/11475/27410
Fulltext version:	Published version
License (according to publishing contract):	CC BY 4.0: Attribution 4.0 International
Departement:	Life Sciences and Facility Management
Organisational Unit:	Institute of Natural Resource Sciences (IUNR)
Published as part of the ZHAW project:	Nachhaltig produzierte Wasserlinsen als mögliche neue Proteinquelle für die Aquakultur
Appears in collections:	Publikationen Life Sciences und Facility Management

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Stadtlander, T., Tschudi, F., Seitz, A., Sigrist, M., Refardt, D., & Leiber, F. (2023). Partial replacement of fishmeal with duckweed (Spirodela polyrhiza) in feed for two carnivorous fish species, Eurasian perch (Perca fluviatilis) and rainbow trout (Oncorhynchus mykiss). Aquaculture Research, 2023(6680943). https://doi.org/10.1155/2023/6680943

Stadtlander, T. et al. (2023) ‘Partial replacement of fishmeal with duckweed (Spirodela polyrhiza) in feed for two carnivorous fish species, Eurasian perch (Perca fluviatilis) and rainbow trout (Oncorhynchus mykiss)’, Aquaculture Research, 2023(6680943). Available at: https://doi.org/10.1155/2023/6680943.

T. Stadtlander, F. Tschudi, A. Seitz, M. Sigrist, D. Refardt, and F. Leiber, “Partial replacement of fishmeal with duckweed (Spirodela polyrhiza) in feed for two carnivorous fish species, Eurasian perch (Perca fluviatilis) and rainbow trout (Oncorhynchus mykiss),” Aquaculture Research, vol. 2023, no. 6680943, 2023, doi: 10.1155/2023/6680943.

STADTLANDER, Timo, Fridolin TSCHUDI, Andreas SEITZ, Mathias SIGRIST, Dominik REFARDT und Florian LEIBER, 2023. Partial replacement of fishmeal with duckweed (Spirodela polyrhiza) in feed for two carnivorous fish species, Eurasian perch (Perca fluviatilis) and rainbow trout (Oncorhynchus mykiss). Aquaculture Research. 2023. Bd. 2023, Nr. 6680943. DOI 10.1155/2023/6680943

Stadtlander, Timo, Fridolin Tschudi, Andreas Seitz, Mathias Sigrist, Dominik Refardt, and Florian Leiber. 2023. “Partial Replacement of Fishmeal with Duckweed (Spirodela Polyrhiza) in Feed for Two Carnivorous Fish Species, Eurasian Perch (Perca Fluviatilis) and Rainbow Trout (Oncorhynchus Mykiss).” Aquaculture Research 2023 (6680943). https://doi.org/10.1155/2023/6680943.

Stadtlander, Timo, et al. “Partial Replacement of Fishmeal with Duckweed (Spirodela Polyrhiza) in Feed for Two Carnivorous Fish Species, Eurasian Perch (Perca Fluviatilis) and Rainbow Trout (Oncorhynchus Mykiss).” Aquaculture Research, vol. 2023, no. 6680943, 2023, https://doi.org/10.1155/2023/6680943.