Influence of diet on respiratory quotients and fat deposition in growing pigs

Charlet-Lery, Geneviève; Morel, Marie-Thérèse

doi:10.1051/animres:19770346

Cited by 2 publications

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“…The decreasing RQ after a protein diet (Figure 1a) suggests an increased oxidation of fat (RQ ¼ 0.70) and amino acids (RQ ¼ 0.81) due to a lack of glucose (RQ ¼ 1) availability. Similar changes in the RQ after carbohydrate and protein diets in growing pigs were described by Charlet-Lery and Morel (1977). The increased amino acid oxidation after the protein diet could be related to the circadian rhythm of the 13 C enrichment of expired CO 2 , which was nearly invariable for SYN but showed clear fluctuations for ASYN ( Figure 1b).…”

Section: Discussionsupporting

confidence: 68%

Synchronising the availability of amino acids and glucose increases protein retention in pigs

Borne

Schrama

Heetkamp

et al. 2007

Animal

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Effects of synchronising the availability of amino acids and glucose within a day on protein and energy metabolism were studied in growing pigs. Ten pigs of on average 54 (s.e. 1.0) kg live weight were assigned to each of two dietary treatments (synchronous v. asynchronous nutrient supply) in a change-over design. On the synchronous treatment (SYN), pigs received two balanced meals: one at 0800 h and one at 1600 h. On the asynchronous treatment (ASYN), pigs received virtually all protein at 0800 h and all carbohydrates at 1600 h. The dietary supply of ingredients and nutrients to pigs was similar for both treatments. Pigs were housed individually in respiration chambers. Faecal apparent nutrient digestibility was determined and nitrogen and energy balances were measured. Faecal apparent digestibility of energy, organic matter and non-starch polysaccharides was higher ( P , 0.05) for SYN than for ASYN. The efficiency of utilisation of digestible protein with protein gain was higher ( P ¼ 0.001) for SYN (56.7%) than for ASYN (47.1%). The substantial decrease ( P , 0.05) in respiratory quotient and 13 C enrichment of the expired CO 2 after the morning meal indicated higher amino acid oxidation for ASYN than for SYN. Heat production and energy retention as fat were not affected by nutrient synchrony. In conclusion, an asynchronous availability of glucose and amino acids within a day increases amino acid oxidation, resulting in a substantial reduction in protein utilisation but with virtually no effect on fat retention.

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Section: Discussionsupporting

confidence: 68%

Synchronising the availability of amino acids and glucose increases protein retention in pigs

Borne

Schrama

Heetkamp

et al. 2007

Animal

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“…This is also reflected in their seasonal energy balance. The body weight of male minks and polecats can vary over 30% during the year (CHARLET-LERY et al 1984;KORHONEN and HARRI 1986;KORHONEN andJUSKELAlNEN 1987;KORHONEN 1988 b). I n females this change is less, varying from 18 to 23% for mated (KORHONEN 1988b) and from 9 to 20% for nonmated females (KORHONEN and HARRI 1986;KORHONEN and JAAsKELAINEN 1987).…”

Section: Resultsmentioning

confidence: 99%

Seasonal regulation of weight loss in female farm mink

Korhonen

1990

Animal Physiology Nutrition

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Zusammenfassung Saisonale Regulation von Gewichtsverlusten bei weiblichen Zuchtnerzen (Mustela vison) Um die saisonalen Gewichtsveränderungen bei weiblichen Zuchtnerzen zu erfassen, wurden Veränderungen in der Energieaufnahme, dem Körpergewicht, der Bewegungsaktivität und dem allgemeinen Verhalten der Nerze von Mitte Dezember bis Ende Mai beobachtet. Das Körpergewicht von erwachsenen Weibchen lag zu Beginn der Paarungssaison relativ niedrig. Die Unterschiede im Körpergewicht zwischen dem Maximum im Dezember und dem Minimum im März betrugen 16%. Die Futteraufnahme stieg zu Beginn des Frühjahrs kontinuierlich an. Dieselbe Tendenz zeigte die Bewegungsaktivität. Gewichtsverluste waren eine direkte Folge von Energie‐Aufnahme und Energie‐Umsatz. Die saisonale Regulation des Körpergewichtes und des Energieansatzes ist demnach beim Nerz ein dynamischer Prozeß, der nur durch die Interaktion verschiedener Faktoren erklärt werden kann.

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Influence of diet on respiratory quotients and fat deposition in growing pigs

Abstract: to the same variety and were introduced at the level of 70 per cent into isonitrogenous diets ( 20 % CP) offered till the age of 9 weeks. In these conditions, a marked effect was

Cited by 2 publications

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Synchronising the availability of amino acids and glucose increases protein retention in pigs

Synchronising the availability of amino acids and glucose increases protein retention in pigs

Seasonal regulation of weight loss in female farm mink

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