Range usage or body weight has minor effect on the gastrointestinal passage rate of commercial free-range laying hen

M Kolakshyapati; T V Nguyen; T Z Sibanda; I Ruhnke

Abstract

Free-range flocks are composed of hens that prefer to spend the majority of their time in sheds, "stayers", and hens that prefer to spend the majority of their time on the range, "rangers". While it was previously shown that rangers and stayers differ significantly in egg production, the rationale and underlying mechanism for the different performance remains unknown (Ruhnke and Sibanda, 2018). Range usage may contribute to improved digestive organ development such as the gizzard due to the positive effects of coarse fibre and grit stones leading to an increased grinding activity, and subsequently a decreased passage rate resulting in an increased exposure time of nutrients to digestive enzymes and overall increased nutrient digestibility (Amerah et al. 2009; Hetland et al. 2004). On the other hand, body weight may influence passage rate, due to a larger digestive tract convolute and subsequently larger quantities of enzyme secretion, and a larger intestinal absorption surface.

Original language	English
Pages	i-i
Publication status	Published - 1 Oct 2019
Event	RAAN 2019: Recent Advances in Animal Nutrition - Australia - University of New England, Armidale, Australia Duration: 25 Oct 2019 → 27 Oct 2019

Conference

Conference	RAAN 2019: Recent Advances in Animal Nutrition - Australia
City	Armidale, Australia
Period	25/10/19 → 27/10/19

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@conference{b432cb8563a04fa69cc289ccf4855075,

title = "Range usage or body weight has minor effect on the gastrointestinal passage rate of commercial free-range laying hen",

abstract = "Free-range flocks are composed of hens that prefer to spend the majority of their time in sheds, {"}stayers{"}, and hens that prefer to spend the majority of their time on the range, {"}rangers{"}. While it was previously shown that rangers and stayers differ significantly in egg production, the rationale and underlying mechanism for the different performance remains unknown (Ruhnke and Sibanda, 2018). Range usage may contribute to improved digestive organ development such as the gizzard due to the positive effects of coarse fibre and grit stones leading to an increased grinding activity, and subsequently a decreased passage rate resulting in an increased exposure time of nutrients to digestive enzymes and overall increased nutrient digestibility (Amerah et al. 2009; Hetland et al. 2004). On the other hand, body weight may influence passage rate, due to a larger digestive tract convolute and subsequently larger quantities of enzyme secretion, and a larger intestinal absorption surface.",

author = "M Kolakshyapati and Nguyen, \{T V\} and Sibanda, \{T Z\} and I Ruhnke",

note = "Publication also known as {"}Recent Advances in Animal Nutrition - Australia 2019{"}; RAAN 2019: Recent Advances in Animal Nutrition - Australia ; Conference date: 25-10-2019 Through 27-10-2019",

year = "2019",

month = oct,

day = "1",

language = "English",

pages = "i--i",

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TY - CONF

T1 - Range usage or body weight has minor effect on the gastrointestinal passage rate of commercial free-range laying hen

AU - Kolakshyapati, M

AU - Nguyen, T V

AU - Sibanda, T Z

AU - Ruhnke, I

N1 - Publication also known as "Recent Advances in Animal Nutrition - Australia 2019"

PY - 2019/10/1

Y1 - 2019/10/1

N2 - Free-range flocks are composed of hens that prefer to spend the majority of their time in sheds, "stayers", and hens that prefer to spend the majority of their time on the range, "rangers". While it was previously shown that rangers and stayers differ significantly in egg production, the rationale and underlying mechanism for the different performance remains unknown (Ruhnke and Sibanda, 2018). Range usage may contribute to improved digestive organ development such as the gizzard due to the positive effects of coarse fibre and grit stones leading to an increased grinding activity, and subsequently a decreased passage rate resulting in an increased exposure time of nutrients to digestive enzymes and overall increased nutrient digestibility (Amerah et al. 2009; Hetland et al. 2004). On the other hand, body weight may influence passage rate, due to a larger digestive tract convolute and subsequently larger quantities of enzyme secretion, and a larger intestinal absorption surface.

AB - Free-range flocks are composed of hens that prefer to spend the majority of their time in sheds, "stayers", and hens that prefer to spend the majority of their time on the range, "rangers". While it was previously shown that rangers and stayers differ significantly in egg production, the rationale and underlying mechanism for the different performance remains unknown (Ruhnke and Sibanda, 2018). Range usage may contribute to improved digestive organ development such as the gizzard due to the positive effects of coarse fibre and grit stones leading to an increased grinding activity, and subsequently a decreased passage rate resulting in an increased exposure time of nutrients to digestive enzymes and overall increased nutrient digestibility (Amerah et al. 2009; Hetland et al. 2004). On the other hand, body weight may influence passage rate, due to a larger digestive tract convolute and subsequently larger quantities of enzyme secretion, and a larger intestinal absorption surface.

M3 - Abstract

SP - i-i

T2 - RAAN 2019: Recent Advances in Animal Nutrition - Australia

Y2 - 25 October 2019 through 27 October 2019