兽类学报 ›› 2026, Vol. 46 ›› Issue (5): 720-733.DOI: 10.16829/j.slxb.151095
收稿日期:2025-04-23
接受日期:2025-05-22
出版日期:2026-09-30
发布日期:2026-08-12
通讯作者:
赵志军
作者简介:杜雅杰(2001- ),女,硕士,主要从事动物生理生态学研究.
基金资助:
Yajie DU, Zhen ZHAO, Kaiyuan ZHANG, Jing CAO, Zhijun ZHAO(
)
Received:2025-04-23
Accepted:2025-05-22
Online:2026-09-30
Published:2026-08-12
Contact:
Zhijun ZHAO
摘要:
食物的多样性和食物质量的季节性变化是野生小型哺乳动物必须应对的主要环境因子。哺乳期是动物能量需求最高的生活史阶段之一,在此期间对不同食物的选择偏好对确保哺乳期母体的能量需求和繁殖成功具有重要影响。本研究采用能量收支法和微生物16S rRNA基因测序,探讨了黑线仓鼠(Cricetulus barabensis)在哺乳期分别摄取高蛋白、高脂肪和高纤维食物对其能量摄入、繁殖输出及肠道菌群的影响。结果发现,黑线仓鼠显著偏好高脂食物,非繁殖期摄取高脂食物占总摄食量的59.8%,哺乳期高达78.1%,而标准维持鼠食物、高蛋白和高纤维食物仅占8.4%、3.3%和10.1%。与非繁殖期相比,哺乳期母体摄食量显著增加,静息代谢率亦显著提高,但自由选择食物的母体最大摄食量均未超过对照组水平。摄取高蛋白和高纤维食物母体的泌乳输出、幼体的胎仔质量均显著低于对照组和摄取高脂食物组。与非繁殖期相比,哺乳期母体的消化系统质量显著增加,摄取高纤维食物组的大肠和盲肠质量显著高于其他各组。盲肠厚壁菌门(Firmicutes)和拟杆菌门(Bacteroidota)为门水平上的优势菌群,与对照组相比,高蛋白食物组厚壁菌门相对丰度降低,而拟杆菌门相对丰度升高;高纤维食物组和高蛋白食物组α多样性(ASVs数量、Chao1指数和Shannon指数)显著降低,而高脂食物组和自由选择食物组未发生显著变化。结果表明,哺乳期黑线仓鼠对食物的选择具有显著的偏好,高蛋白食物具有较高食物特殊动力效应,可能是摄取比例较低的主要原因;消化系统可塑性可能达到瓶颈,在一定程度上限制了动物的选择偏好。摄取高纤维和高蛋白食物的母体未能通过增加能量摄入满足幼体的能量需求,泌乳能量支出显著降低是主要原因之一,这些变化可能与肠道微生物α多样性显著降低有关。食物资源可利用性的季节性变化对野生小型哺乳动物的季节性繁殖策略具有重要影响,仅利用高蛋白和高纤维食物会降低母体的繁殖价值。
中图分类号:
杜雅杰, 赵真, 张开元, 曹静, 赵志军. 食物偏好对哺乳期黑线仓鼠能量代谢和肠道菌群的影响[J]. 兽类学报, 2026, 46(5): 720-733.
Yajie DU, Zhen ZHAO, Kaiyuan ZHANG, Jing CAO, Zhijun ZHAO. The effect of food preference on energy metabolism and gut microbiota in lactating striped hamsters[J]. ACTA THERIOLOGICA SINICA, 2026, 46(5): 720-733.
图1 非繁殖组(NR)与哺乳组(Lac)黑线仓鼠的体质量和摄食量. Con:对照组;H-fiber:高纤维食物组;H-protein:高蛋白食物组;H-fat:高脂食物组;All-kind:自由选择食物组. P-Con、P-Hfiber、P-Hprotein和P-Hfat为黑线仓鼠每日各类食物摄食量. 折线图数据表示为平均值 ± 标准误,柱状图数据表示为平均值 ± 标准差. Pdiet 表示食物类型的影响. ** P < 0.01,*** P < 0.001;ns,P > 0.05
Fig. 1 Body mass and food intake of non-reproductive (NR) and lactating striped hamsters (Lac). Con: pellet chow diet was provided only; H-fiber: high-fiber diet was provided only; H-protein: high-protein diet was provided only; H-fat: high-fat diet was provided only; All-kind: the striped hamsters had free access to diet. P-Con, P-Hfiber, P-Hprotein and P-Hfat indicate the amount of food intake that hamsters preferred. Data are means ± SE for lines, and means ± SD for columns. Pdiet, effect of diet. ** P < 0.01, *** P < 0.001; ns, non-significant effect (P > 0.05)
图2 非繁殖组(NR)与哺乳组(Lac)黑线仓鼠的静息代谢率(RMR)和泌乳能量支出(MEO). A:母鼠整体RMR;B:母鼠单位体质量RMR;C:整窝幼仔RMR;D:幼仔单位体质量RMR;E:母鼠的泌乳能量支出. Con:对照组;H-fiber:高纤维食物组;H-protein:高蛋白食物组;H-fat:高脂食物组;All-kind:自由选择食物组.数据表示为平均值 ± 标准差. PLac 表示哺乳影响. ** P < 0.01,*** P < 0.001;ns,P > 0.05
Fig. 2 The resting metabolic rate (RMR) and milk energy output (MEO) of non-reproductive and/ or lactating striped hamsters (NR and Lac). A: RMR of females when expressed as per hamster; B: RMR of females when expressed as per gram; C: RMR of pups when expressed as per litter; D: RMR of pups when expressed as per gram of pups; E: MEO of females at peak lactation. Con: pellet chow diet was provided only; H-fiber: high-fiber diet was provided only; H-protein: high-protein diet was provided only; H-fat: high-fat diet was provided only; All-kind: the hamsters had free access to diet. Data are means ± SD. PLac, effect of lactation; ** P < 0.01, *** P < 0.001; ns, non-significant effect (P > 0.05)
图3 哺乳期黑线仓鼠的胎仔数与胎仔质量. Con:对照组;H-fiber:高纤维食物组;H-protein:高蛋白食物组;H-fat:高脂食物组;All-kind:自由选择食物组. 折线图数据表示为平均值 ± 标准误,柱状图数据表示为平均值 ± 标准差. Pdiet 表示食物类型的影响. * P < 0.05,** P < 0.01,*** P < 0.001;ns,P > 0.05
Fig. 3 Litter size and litter mass of lactating striped hamsters. Con: pellet chow diet was provided only; H-fiber: high-fiber diet was provided only; H-protein: high-protein diet was provided only; H-fat: high-fat diet was provided only; All-kind: the striped hamsters had free access to diet. Data are means ± SE for lines, and means ± SD for columns. Pdiet, effect of diet. * P < 0.05, ** P < 0.01, *** P < 0.001; ns, non-significant effect (P > 0.05)
图4 非繁殖组(NR)与哺乳组(Lac)黑线仓鼠的身体组成. Con:对照组;H-fiber:高纤维食物组;H-protein:高蛋白食物组;H-fat:高脂食物组;All-kind:自由选择食物组. 数据表示为平均值 ± 标准差. PLac 表示哺乳影响,Pdiet 表示食物类型的影响. * P < 0.05,** P < 0.01,*** P < 0.001
Fig. 4 Body composition of non-reproductive hamsters (NR) and lactating striped hamsters (Lac). Con: pellet chow diet was provided only; H-fiber: high-fiber diet was provided only; H-protein: high-protein diet was provided only; H-fat: high-fat diet was provided only; All-kind: the striped hamsters had free access to diet. Data are means ± SD. PLac, effect of lactation; Pdiet, effect of diet. * P < 0.05, ** P < 0.01, *** P < 0.001
图5 哺乳组黑线仓鼠肠道微生物群落的多样性. A:观测到的ASVs数量;B:Chao1指数反映的α多样性;C:Shannon指数反映的α多样性;D:稀释曲线反映的α多样性;E:Bray-Curtis距离反映的β多样性;F:Jaccard距离反映的β多样性;G、H:基于Bray-Curtis距离与Jaccard距离的PCoA表示5组肠道微生物群落组成的差异化分布模式. Con:对照组;H-fiber:高纤维食物组;H-protein:高蛋白食物组;H-fat:高脂食物组;All-kind:自由选择食物组. 群落多样性分析基于5组的ASVs数量. * P < 0.05,** P < 0.01,*** P < 0.001;ns,P > 0.05
Fig. 5 The community diversity of gut microbiota in lactating striped hamsters. A: Observed amplicon sequence variants (ASVs) number; B: the alpha diversity in chao1 index; C: the alpha diversity in shannon index; D: alpha diversity in dilution curve; E: the beta diversity in bray curtis distance; F: the beta diversity in jaccard distance; G, H: the Principal Co-ordinates analysis (PCoA) with Bray-Curtis distance and Jaccard distance shows the patterns of separation of gut microbiota community from the 5 groups in. Con: pellet chow diet was provided only; H-fiber: high-fiber diet was provided only; H-protein: high-protein diet was provided only; H-fat: high-fat diet was provided only; All-kind: the striped hamsters had free access to diet. The community diversity was analyzed based on the ASVs number in the 5 groups. * P < 0.05, ** P < 0.01, *** P < 0.001; ns, non-significant effect (P > 0.05)
图6 哺乳组黑线仓鼠肠道微生物的相对丰度. A:丰度排名前十的菌门;B:丰度排名前十的菌种;C:种水平的Venn图;D、E:前十大菌门与前十大菌种的聚类热图. Con:对照组;H-fiber:高纤维食物组;H-protein:高蛋白食物组;H-fat:高脂食物组;All-kind:自由选择食物组. 相对丰度分析基于5组母鼠的ASV数量
Fig. 6 Relative abundance of gut microbiota in lactating striped hamsters. A: the top ten phylum microbiota; B: the top ten species microbiota; C: the Venn figure of species microbiota; D, E: the cluster heatmap of top ten phylum microbiota and top ten species microbiota. Con: pellet chow diet was provided only; H-fiber: high-fiber diet was provided only; H-protein: high-protein diet was provided only; H-fat: high-fat diet was provided only; All-kind: the striped hamsters had free access to diet. The relative abundance was analyzed based on the amplicon sequence variant (ASV) number of each hamster in the 5 groups
图7 哺乳组黑线仓鼠肠道微生物丰度及预测功能差异. A ~ D:丰度排名前十的菌门的倍数变化;E ~ H:特定菌门对组间差异的贡献;I:肠道微生物预测功能的相对丰度;J:基于ASVs的微生物预测功能Venn图;K:肠道微生物预测功能的主成分分析. Con:对照组;H-fiber:高纤维食物组;H-protein:高蛋白食物组;H-fat:高脂食物组;All-kind:自由选择食物组. * P < 0.05,** P < 0.01,*** P < 0.001
Fig. 7 The differences in the abundance and the predicted function of gut microbiota in lactating striped hamsters. A - D: the fold changes in the top 10 phylum microbiota; E - H: the contributions of the specific phylum microbiota to the difference between the two groups; I: the relative abundance of the predicted function of gut microbiota; J: the Venn figure of predicted function of microbiota based on the amplicon sequence variants (ASVs); K: the principal components analysis (PCA) of the predicted function of gut microbiota. Con: pellet chow diet was provided only; H-fiber: high-fiber diet was provided only; H-protein: high-protein diet was provided only; H-fat: high-fat diet was provided only; All-kind: the striped hamsters had free access to diet. * P < 0.05, ** P < 0.01, *** P < 0.001
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