The use of markers to determine energy metabolizability and nutrient digestibility in avian species

Sales, J.; Janssens, Geert

doi:10.1079/wps20030019

Cited by 53 publications

(30 citation statements)

References 77 publications

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“…Likewise, Sales & Janssens (2003b) Regarding the use or not of the Fe 2 O 3 marker, the metabolizabilities were similar for the two methodologies. However, the use of the marker in the 3-day collection led to the lowest CP metabolizability (P<0.02), which may be explained by the specific aspects concerning the digesta flow in birds.…”

Section: Resultsmentioning

confidence: 78%

“…However, commercially available forms of Cr 2 O 3 may contain small amounts of soluble forms of the metal that, if absorbed, may affect results (Neto et al, 2003). According to Sales & Janssens (2003a), the lower results obtained with this methodology are explained by the inherent mistakes to it, such as the variability in the indicator recovery rate in excreta or the lack of uniformity due to the manner in which the indicator combines with larger particles.…”

Section: Resultsmentioning

confidence: 99%

“…Adding indicators to feeds eliminates the need to measure feed intake and to collect all the excreta produced (Sales & Janssens, 2003b). This method produces good results compared to total collection, although indicator recovery in excreta may vary (Jagger et al, 1992).…”

Section: Introductionmentioning

confidence: 97%

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Study of methodological variations in apparent nutrient metabolism determination in broiler chickens

et al. 2009

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-An experiment was conducted to define a protocol to determine metabolizable nutrient and energy values of diets. The metabolizability (M) was calculated of the dry matter (DM); crude protein (CP); gross energy (GE) and AME n of a single diet. Eighty-one 21-day old (d) male birds were used. The tested methodologies were: Cr 2 O 3 (0.5%) as an indicator (partial collection) or Fe 2 O 3 (1%) as a marker; fasting (0, 4, 6 and 8 h) prior to excreta collection and at the end of the feeding period on the last day of collection (total collection). The excreta collection periods were also tested (3 and 5 days).Twenty 31-day old male broilers from the same group of birds were used to assess the effect of fasting on digestive organ weight. At the end of fasting the digestive organs were removed and weighed. Metabolism coefficients and energy were not different between 3 and 5 days of total collection. CPM was lower for marker utilization and 3 days excreta collection compared to the total collection. Eight hours fasting resulted in significantly lower CPM compared to the other periods or the no fasting. With the methodology of partial collection with 5 days of collection, the lowest values were observed for all the responses, compared to the 3 day collection period. The use of the total collection methodology produced the highest DMM and CPM compared to partial collection. No influence of fasting was observed on the digestive organ sizes, indicating that until 8 hours of fasting no changes were observed in either relative or absolute organ weight. However, the relative jejunum weight of birds submitted to 4 hours fasting was higher than that of birds under no fasting. Total collection, during a 3 day period, without fasting and marker use, is the best methodology for ingredient and feed evaluation of growing birds.Key Words: chromic oxide, excreta collection, fasting, ferric oxide, metabolizable energy organ size Estudo de variações metodológicas na determinação do metabolismo aparente de nutrientes em frangos de corte RESUMO -Realizou-se um ensaio com frangos de corte para a definição de um protocolo de determinação da metabolizabilidade dos nutrientes e da energia da dieta. Foram estimados os coeficientes de metabolizabilidade de matéria seca (MS), proteína bruta (PB), energia bruta (EB) e a energia metabolizável aparente corrigida para nitrogênio (EMA n )de uma mesma dieta, utilizando-se 81 aves, de 21 dias de idade. As metodologias testadas foram as seguintes: utilização de 0,5% de Cr 2 O 3 como indicador (coleta parcial) ou 1% de Fe 2 O 3 como marcador e aplicação ou não de jejum (0, 4, 6 e 8 horas)pré-início de coleta e após a última refeição, no último dia de coleta (coletas totais). Períodos de coleta de três ou cinco dias também foram testados. Retiradas do mesmo grupo original, 20 aves de 31 dias de idade foram usadas para avaliar o efeito do jejum sobre o tamanho dos órgãos digestivos. Após o jejum, os órgãos foram retirados e pesados. Os coeficientes de metabolizabilidade e a EMA n determinados pelo m...

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Section: Resultsmentioning

confidence: 78%

Section: Resultsmentioning

confidence: 99%

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Study of methodological variations in apparent nutrient metabolism determination in broiler chickens

et al. 2009

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“…Existem, basicamente, dois métodos para a realização desses ensaios: o método convencional ou de coleta total e o método dos indicadores ou substâncias índices. Conforme citado por SALES & JANSSENS (2003), o primeiro requer controle da quantidade do alimento ingerido e das fezes excretadas, exigindo também maior tempo de coleta. Já o segundo pode ser realizado em menor espaço de tempo e não há necessidade da mensuração do que é ingerido e excretado.…”

Section: Introductionunclassified

Metodologias para determinação da digestibilidade de dietas contendo fontes proteicas vegetal ou animal em cães

et al. 2013

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RESUMO Objetivou-se avaliar diferentes metodologias de determinação da digestibilidade em cães, alimentados com duas dietas contendo fontes proteicas animal (farinha de vísceras de aves -FVA) e vegetal (farelo de soja -FS Palavras-chave: ensaio de digestibilidade, indicadores, ingredientesproteicos. ABSTRACT The objective was to evaluate different methods of measuring digestibility in dogs fed two diets containing animal (poultry by products -PBP) and vegetable (soybean meal -SBM) protein sources. The methods evaluated were: total fecal collection (TFC) and indicators: acid insoluble ash (AIA), acid detergent fi ber (ADF) and crude fi ber (CF). Eight dogs were distributed in Cross

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“…However, Oberleas et al (1990) criticized usage of Cr 2 O 3 as marker because it rapidly carried in liquid phase rather than solid phase of digesta. Analytical estimation of Cr 2 O 3 is highly variable with low repeatability (Sales and Janssens, 2003). Acid insoluble ash can also be used as indigestible marker.…”

Section: Digestibility Markermentioning

confidence: 99%

Digestible Amino Acids: Significance and Prospects in Poultry

Ullah¹,

Ali²,

Mehr-un-Nisa³

et al. 2015

IJAB

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Amino acids (AA) are protein's hydrolytic products. In the recent years, poultry diets are being formulated on digestible AA (DAA) basis rather than total AA. Different techniques including precision-fed rooster assay, precision-fed cecectomized rooster assay, ileal AA digestibility and precision-fed broiler chick assay are used to determine the DAA coefficients of feed ingredients. However, nutritionists consider that the ileal digestibility in growing and adult birds is more accurate than other techniques. In all these digestibility techniques, apparent AA digestibility is corrected for endogenous AA losses to achieve standardized AA digestibility values. The digestibility values, determined using different digestibility techniques, of any feed ingredient vary. This variation in digestibility values can be minimized by adopting same digestibility technique for the estimation of DAA coefficients. Birds fed diets formulated on DAA basis resulted in better growth performance, feed efficiency and production economics. The main objective of this review is to examine the poultry's performance fed diet formulated based on the DAA.

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The use of markers to determine energy metabolizability and nutrient digestibility in avian species

Cited by 53 publications

References 77 publications

Study of methodological variations in apparent nutrient metabolism determination in broiler chickens

Study of methodological variations in apparent nutrient metabolism determination in broiler chickens

Metodologias para determinação da digestibilidade de dietas contendo fontes proteicas vegetal ou animal em cães

Digestible Amino Acids: Significance and Prospects in Poultry

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