Livestock-Forest integrated system attenuates deleterious heat stress effects in bovine oocytes

IF 2.2 2区农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Animal Reproduction Science Pub Date : 2024-07-26 DOI:10.1016/j.anireprosci.2024.107568

Clara Slade Oliveira , Hugo Rocha Sabença Dias , Agostinho Jorge dos Reis Camargo , Anderson Mourão , Viviane Luzia da Silva Feuchard , Marcelo Dias Muller , Felipe Zandonadi Brandão , Luiz Altamiro Garcia Nogueira , Rui da Silva Verneque , Naiara Zoccal Saraiva , Luiz Sergio de Almeida Camargo

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引用次数: 0

Abstract

Global warming poses significant challenges to the fertility of tropical dairy cattle. One promising approach to mitigate heat stress effects on reproductive function and reduce the carbon footprint is the use of integrated livestock-forest (ILF) systems. The aim of this study was to investigate the effects of two different systems, namely Full Sun (FS) and ILF, on maternal hyperthermia and oocyte quality of Holstein and Girolando heifers during the tropical summer season. The temperature-humidity index (THI) data revealed intense heat stress during the experiment. Both the system (P<0.01) and the breed (P<0.01) factors had a significant impact on vaginal temperature, being hyperthermia more pronounced in the FS system and in the Holstein breed. Over the five time points collected at a 33-day interval, we observed distinct patterns for ILF (P=0.65) and FS (P<0.001) systems, suggesting an adaptive response in animals kept in FS systems. Furthermore, oocyte quality assessment revealed an effect of the system for oocyte diameter (P<0.001) and levels of IGFBP2 (P<0.001), and caspase 3 levels showed a decrease in ILF compared to FS for both Holstein (P<0.001) and Girolando (P<0.001) breeds. Collectively, these parameters indicate that oocyte quality during the summer months was superior in animals maintained in the ILF system. In conclusion, the ILF system demonstrated promising results in attenuating maternal hyperthermia and mitigating its effects on oocyte quality. Additionally, our observations suggest that animals in the FS system may exhibit an adaptive response to heat stress.

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家畜-森林综合系统可减轻牛卵母细胞中有害的热应力效应

全球变暖给热带乳牛的繁殖能力带来了巨大挑战。减轻热应激对繁殖功能的影响并减少碳足迹的一种可行方法是使用畜牧-森林（ILF）综合系统。本研究的目的是调查在热带夏季，全日照（FS）和ILF这两种不同的系统对荷斯坦母牛和吉兰多母牛的母体高热和卵母细胞质量的影响。温湿度指数（THI）数据显示试验期间存在强烈的热应激。系统（P<0.01）和品种（P<0.01）因素对阴道温度都有显著影响，在 FS 系统和荷斯坦品种中高热更为明显。在间隔 33 天收集的五个时间点上，我们观察到 ILF 系统（P=0.65）和 FS 系统（P<0.001）的不同模式，这表明在 FS 系统中饲养的动物有一种适应性反应。此外，卵母细胞质量评估显示，在荷斯坦（P<0.001）和吉罗兰多（P<0.001）品种中，卵母细胞直径（P<0.001）和IGFBP2水平（P<0.001）受饲养系统的影响，而Caspase 3水平在ILF中比在FS中下降。总之，这些参数表明，在 ILF 系统中饲养的动物夏季的卵母细胞质量更好。总之，ILF 系统在降低母体高热和减轻其对卵母细胞质量的影响方面表现出了良好的效果。此外，我们的观察结果表明，FS系统中的动物可能对热应激表现出适应性反应。

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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来源期刊

Animal Reproduction Science 农林科学-奶制品与动物科学

CiteScore

4.50

自引率

9.10%

发文量

136

审稿时长

54 days

期刊介绍： Animal Reproduction Science publishes results from studies relating to reproduction and fertility in animals. This includes both fundamental research and applied studies, including management practices that increase our understanding of the biology and manipulation of reproduction. Manuscripts should go into depth in the mechanisms involved in the research reported, rather than a give a mere description of findings. The focus is on animals that are useful to humans including food- and fibre-producing; companion/recreational; captive; and endangered species including zoo animals, but excluding laboratory animals unless the results of the study provide new information that impacts the basic understanding of the biology or manipulation of reproduction. The journal''s scope includes the study of reproductive physiology and endocrinology, reproductive cycles, natural and artificial control of reproduction, preservation and use of gametes and embryos, pregnancy and parturition, infertility and sterility, diagnostic and therapeutic techniques. The Editorial Board of Animal Reproduction Science has decided not to publish papers in which there is an exclusive examination of the in vitro development of oocytes and embryos; however, there will be consideration of papers that include in vitro studies where the source of the oocytes and/or development of the embryos beyond the blastocyst stage is part of the experimental design.