Effects of dietary replacement of fish meal by defatted black soldier fly larvae on growth performance, blood profiles, immune response, and diarrhea incidence in weaning pigs.

IF 2.5 2区农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Animal Bioscience Pub Date : 2025-10-22 DOI:10.5713/ab.25.0426

Noh Soo Duc, Jin Xing Hao, Jang Min Hyuk, Park Min Soo, Kim Yoo Yong

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Abstract

Purpose: The purpose of this experiment was to evaluate the effects of dietary replacement of fish meal by black soldier fly (BSF) larvae on growth performance, blood profiles, immune response, and diarrhea incidence in weaning pigs.

Methods: A total of 160 weaning ([Yorkshire × Landrace]) × Duroc) pigs (7.47 ± 0.02 kg body weight [BW]) were assigned to four treatments based on sex and initial body weight, with five replicates of eight pigs per pen in a randomized complete block design (RCBD). Experimental diets with black soldier fly (BSF) larvae replaced fish meal (FM) at 0, 25, 50, and 100% for phase I (0 to 2 weeks). Phase II (3 to 4 weeks) were as follows: 1) Control: corn‒soybean-based diet containing FM 4%, 2) BSF25: corn‒soybean-based diet containing FM 3% and BSF larvae 1%, 3) BSF50: corn‒soybean-based diet containing FM 2% and BSF larvae 2%, 4) BSF100: corn‒soybean-based diet containing BSF larvae 4%.

Results: The study found no significant differences among the treatment groups in BW and ADG during the experimental period. However, an increased tendency of ADFI was observed (linear, p=0.09), and G:F ratio tended to decrease as the replacement rate of fish meal with BSF larvae increased (linear, p=0.06). During phase I, creatinine concentration decreased linearly as BSF larvae level increased (linear, p=0.02). During phase II, a linear response was observed in the change of glucose concentration as an increase in BSF larvae level (linear, p=0.02). Meanwhile, pigs fed with increasing BSF larvae levels showed increased albumin and total protein concentration trends (linear, p=0.05, p=0.05).

Conclusion: Defatted BSF larvae can replace up to 50% of FM in weaning pig diets without detrimental effects on performance, blood metabolites, or immune response.These reassuring findings suggest that BSF larvae could be a sustainable and effective replacement for fish meal in pig diets.

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饲粮中脱脂黑虻幼虫替代鱼粉对断奶仔猪生长性能、血液特征、免疫反应和腹泻发生率的影响

目的：本试验旨在评价饲粮中添加黑兵蝇（BSF）幼虫替代鱼粉对断奶仔猪生长性能、血液特征、免疫反应和腹泻发生率的影响。方法：采用随机完全区组设计（RCBD），选取体重（7.47±0.02 kg [BW]）的断奶（[约克×长]）×杜洛克猪160头，按性别和初始体重分为4个处理，每栏5个重复，每栏8头猪。试验第一阶段（0 ~ 2周）以黑兵蝇（BSF）幼虫替代鱼粉（FM），比例分别为0、25、50%和100%。第二期（3 ~ 4周）试验为：1)对照：玉米-大豆基饲粮（含鱼粉4%），2)BSF25：玉米-大豆基饲粮（含鱼粉3%，BSF幼虫1%），3)BSF50：玉米-大豆基饲粮（含鱼粉2%，BSF幼虫2%），4)BSF100：玉米-大豆基饲粮（含BSF幼虫4%）。结果：试验期各处理组体重、平均日增重无显著差异。ADFI有升高的趋势（线性，p=0.09）， G:F有降低的趋势（线性，p=0.06）。第1阶段，肌酸酐浓度随BSF幼虫水平的升高呈线性下降（线性，p=0.02）。在II期，葡萄糖浓度随BSF幼虫水平的增加呈线性变化（线性，p=0.02）。同时，随着BSF幼虫水平的增加，猪的白蛋白和总蛋白浓度呈上升趋势（线性，p=0.05, p=0.05）。结论：脱脂BSF幼虫可替代断奶仔猪饲粮中高达50%的FM，且不会对生产性能、血液代谢产物或免疫反应产生不利影响。这些令人安心的发现表明，BSF幼虫可以持续有效地替代猪饲料中的鱼粉。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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