Methane production by two non-ruminant foregut-fermenting herbivores: The collared peccary (Pecari tajacu) and the pygmy hippopotamus (Hexaprotodon liberiensis)

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• 作者：Catharina Vendl^a ; Samuel Frei^a ; Marie Theres Dittmann^a ; ^b ; Samuel Furrer^c ; Sylvia Ortmann^d ; Arne Lawrenz^e ; Bastian Lange^f ; Adam Munn^g ; Michael Kreuzer^b ; Marcus Clauss^a ; ^{mclauss@vetclinics.uzh.ch" class="auth_mail" title="E-mail the corresponding author}
• 关键词：aD ; apparent digestibility ; ADF ; acid detergent fibre ; ADL ; acid detergent lignin ; CH4 ; methane ; CO2 ; carbon dioxide ; CF ; crude fibre ; CP ; crude protein ; DEI ; digestible energy intake ; DM ; dry matter ; DMI ; dry matter intake ; EE ; ether extract (&lsquo ; crude fat&rsquo ; ) ; dNDFi ; digestible neutral detergent fibre intake ; GE ; gross energy ; GEI ; gross energy intake ; GLM ; general linear model ; MEI ; metabolisable energy intake ; MR ; metabolic rate ; MRT ; mean retention time ; NDF ; neutral detergent fibre
• 刊名：Comparative Biochemistry and Physiology - Part A: Molecular & Integrative Physiology
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：191
• 期：Complete
• 页码：107-114
• 全文大小：644 K

文摘

Methane (CH₄) production varies between herbivore species, but reasons for this variation remain to be elucidated. Here, we report open-circuit chamber respiration measurements of CH₄ production in four specimens each of two non-ruminant mammalian herbivores with a complex forestomach but largely differing in body size, the collared peccary (Pecari tajacu, mean body mass 17 kg) and the pygmy hippopotamus (Hexaprotodon liberiensis, 229 kg) fed lucerne-based diets. In addition, food intake, digestibility and mean retention times were measured in the same experiments. CH₄ production averaged 8 and 72 L/d, 18 and 19 L/kg dry matter intake, and 4.0 and 4.2% of gross energy intake for the two species, respectively. When compared with previously reported data on CH₄ production in other non-ruminant and ruminant foregut-fermenting as well as hindgut-fermenting species, it is evident that neither the question whether a species is a foregut fermenter or not, or whether it ruminates or not, is of the relevance previously suggested to explain variation in CH₄ production between species. Rather, differences in CH₄ production between species on similar diets appear related to species-specific differences in food intake and digesta retention kinetics.