Abstract
Abstract
Background
The provision of environmental enrichments to Muscovy ducks could reduce the expression of the aggressive behaviors. The aim of the present study was to evaluate the effects of black soldier fly (BSF) and yellow mealworm (YM) live larva provision on Muscovy duck performance, excreta corticosterone metabolites (ECM), behavior, and blood parameters.
Methods
A total of 126 3-day-old female Muscovy ducklings were allotted to 18 pens (6 replicates/treatment, 7 birds/pen) and assigned to 3 experimental treatments: a control group fed commercial feed, and two experimental treatments fed commercial feed plus the 5% (based on the expected daily feed intake, as fed basis) of BSF and YM live larvae (BSF and YM groups, respectively). A two-phase feeding program was applied: starter (from 3 to 31 days of age) and grower-finisher (from 32 to 55 days of age). The live weight, average daily gain, average daily feed intake, and feed conversion ratio were calculated. Larva consumption times were collected, and video recordings were performed during 3 periods (P) each day: the hour before (P1), during (P2), and after (P3) the larva administration. ECM were evaluated at 3, 31, and 55-day-old. Finally, the total red and white blood cell counts, serum proteins, lipids, and liver and renal function serum enzymes were evaluated on 12 birds/treatment.
Results
The experimental treatment did not affect the growth performance of the birds (P > 0.05). Larva consumption times were always similar between the two insect species, except at 14–18 days of age, were BSF larvae were consumed faster than YM larvae (P < 0.001). The birds showed less walking activity during P2, and preening behavior increased in YM birds during P3. The C birds increased the attack behavior over the weeks (P < 0.05). During weeks 1–3 the YM group reduced the attack frequency (P1 > P3; P < 0.05). Finally, the provision of live BSF and YM larvae significantly reduced the ECM at 55 days of age and the heterophil to lymphocyte ratio (P < 0.05).
Conclusions
Live BSF and YM larva supplementation in Muscovy duck improves duck welfare, without impairing birds’ growth performance.
Funder
This paper is supported by the PRIMA programme under grant agreement No 2015, project SUSTAvianFEED. The PRIMA programme is supported by the European Union.
Publisher
Springer Science and Business Media LLC
Subject
Animal Science and Zoology,Biochemistry,Food Science,Biotechnology
Reference40 articles.
1. Botreau R, Veissier I, Butterworth A, Bracke MB, Keeling LJ. Definition of criteria for overall assessment of animal welfare. Anim Welf. 2007;16(2):225.
2. Broom DM. Animal welfare in the European Union. Directorate general for internal policies. European Union; 2017. http://www.europarl.europa.eu/supporting-analyses. Accessed 18 May 2023.
3. Alonso ME, González-Montaña JR, Lomillos JM. Consumers’ concerns and perceptions of farm animal welfare. Animals. 2020;10(3):385.
4. European Commission (EC). Summary of response statistics for public internet consultation on the protection and welfare of farmed animals. 2005. http://ec.europa.eu/food/animal/welfare/sum_response_stats_en.pdf. Accessed 22 May 2023.
5. Martelli G. Consumers’ perception of farm animal welfare: an Italian and European perspective. Ital J Anim Sci. 2009;8:31–41.
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