دورية أكاديمية
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Body weight and sex effects on digesta mean retention time in growing Saanen goats.

التفاصيل البيبلوغرافية
العنوان: Body weight and sex effects on digesta mean retention time in growing Saanen goats.
المؤلفون: Gindri M; Department of Animal Sciences, Universidade Estadual Paulista, Jaboticabal, SP, Brazil., Leite RF; Department of Animal Sciences, Universidade Estadual Paulista, Jaboticabal, SP, Brazil., Härter CJ; Department of Animal Sciences, Universidade Estadual Paulista, Jaboticabal, SP, Brazil., da Silva SP; Department of Animal Sciences, Universidade Estadual Paulista, Jaboticabal, SP, Brazil., St-Pierre N; Perdue AgriBusiness LLC, Salisbury, MD., Fernandes MHMDR; Department of Animal Sciences, Universidade Estadual Paulista, Jaboticabal, SP, Brazil., Berchielli TT; Department of Animal Sciences, Universidade Estadual Paulista, Jaboticabal, SP, Brazil., Teixeira IAMA; Department of Animal Sciences, Universidade Estadual Paulista, Jaboticabal, SP, Brazil.
المصدر: Translational animal science [Transl Anim Sci] 2020 Mar 18; Vol. 4 (2), pp. txaa028. Date of Electronic Publication: 2020 Mar 18 (Print Publication: 2020).
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Oxford University Press Country of Publication: England NLM ID: 101738705 Publication Model: eCollection Cited Medium: Internet ISSN: 2573-2102 (Electronic) Linking ISSN: 25732102 NLM ISO Abbreviation: Transl Anim Sci Subsets: PubMed not MEDLINE
أسماء مطبوعة: Publication: Oxford : Oxford University Press
Original Publication: [Champaign, IL] : American Society of Animal Science, [2017]-
مستخلص: Despite the important role of digesta mean retention time (MRT) on digestive efficiency of ruminants, it is poorly investigated in total gastrointestinal tract (GIT) of growing ruminants, especially in goats. The objective of this study was to evaluate the effect of body weight (BW) and sex on GIT MRT of particles and solutes in growing Saanen goats. A dataset from two studies, comprising 103 individual records of castrated males ( n  = 36), females ( n  = 34), and intact males ( n  = 33) Saanen goats slaughtered at 15, 22, 30, 37, and 45 kg BW, was used. Goats were fed basically with total mixed ration composed by dehydrated corn plant ( Zea mays ) milled to pass a 10-mm screen, cracked corn grain, and soybean (Glycine max) meal. Variables evaluated were BW, feed intake, feed intake level, composition of ingested diet, wet weight of GIT tissues, wet digesta pool size, digesta composition (dry matter and neutral detergent fiber [NDF]), indigestible NDF:NDF ratio of ingested diet and GIT digesta, MRT of particles (MRT iNDF ) and solutes (MRT Cr ), and reticulorumen selectivity factors (large particles/solutes). Reticulorumen, omasum, abomasum, small intestine, cecum, and colon-rectum segments were evaluated. The dataset was analyzed as mixed models considering sex, BW, and sex × BW interaction as fixed effects, and study and residual error as random effects. Sex did not affect MRT iNDF in any GIT segments. Females and intact males presented similar reticulorumen MRT Cr (5.6 h; P  = 0.92) and they presented lower reticulorumen MRT Cr than castrated males (7.0; P  ≤ 0.04). Total GIT MRT Cr was similar between castrated males and females (15.7 h; P  = 0.11) and between females and intact males (14.2 h; P  = 0.76). Body weight (BW) did not affect MRT iNDF in reticulorumen and colon-rectum and total GIT MRT Cr ( P  ≥ 0.11). Reticulorumen and omasum MRT Cr increased as BW increased ( P  < 0.01), and abomasum MRT Cr decreased as BW increased ( P  = 0.02). Feed intake, and wet tissues and wet pool size of all GIT segments increased as BW increased, except abomasum wet pool size ( P  ≤ 0.01). The mechanism related to sex effect on MRT has to be elucidated. Reticulorumen MRT iNDF and total GIT MRT Cr were modulated by intake and capacity of reticulorumen and GIT, respectively. On the other hand, reticulorumen MRT Cr seemed to be regulated by reticulo-omasal orifice opening and saliva secretion.
(© The Author(s) 2020. Published by Oxford University Press on behalf of the American Society of Animal Science.)
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فهرسة مساهمة: Keywords: dairy goat; digesta kinetic; digesta washing; gastrointestinal tract fill; sorting mechanism
تواريخ الأحداث: Date Created: 20200725 Latest Revision: 20200928
رمز التحديث: 20221213
مُعرف محوري في PubMed: PMC7284118
DOI: 10.1093/tas/txaa028
PMID: 32705026
قاعدة البيانات: MEDLINE
الوصف
تدمد:2573-2102
DOI:10.1093/tas/txaa028