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Impact of Nutritional Factors on Eating Behavior and Feather Damage of Laying Hens.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Impact of Nutritional Factors on Eating Behavior and Feather Damage of Laying Hens./
Author:	Van Krimpen, Marinus.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2008,
Description:	238 p.
Notes:	Source: Dissertations Abstracts International, Volume: 83-02, Section: B.
Contained By:	Dissertations Abstracts International83-02B.
Subject:	Foraging behavior. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28238554
ISBN:	9798516032127

Impact of Nutritional Factors on Eating Behavior and Feather Damage of Laying Hens.
Van Krimpen, Marinus.

Impact of Nutritional Factors on Eating Behavior and Feather Damage of Laying Hens. - Ann Arbor : ProQuest Dissertations & Theses, 2008 - 238 p.

Source: Dissertations Abstracts International, Volume: 83-02, Section: B.

Thesis (Ph.D.)--Wageningen University and Research, 2008.

This item must not be sold to any third party vendors.

Feather pecking remains one of the major problems facing the poultry industry. It is assumed that feather pecking behavior is a substitute for normal ground pecking or feeding behavior in the absence of adequate foraging incentives. This justifies a nutritional approach of this problem. Although energy and Non Starch Polysaccharides (NSP) concentrations and particle size of the added NSP source seem to reduce feather pecking behavior in laying hens, these nutritional factors were often confounded in experimental diets. Consequently, it's not clear which factor is most effective in causing these positive effects. In this project, the relationships between feed characteristics - satiety/ development of gut segments - feeding related behavior - feather pecking behavior are studied. The objectives of the present study were: 1. To review the impact of nutritional factors and feeding strategies on feather pecking behavior in laying hens. 2. To determine the independent effects of nutrient density, NSP concentration, and particle sizes of NSP on eating behavior, feather pecking, performance and digesta mean retention time in laying hens between 18 and 40 wk of age. 3. To investigate the carryCover effects of nutrient density and NSP concentration in rearing diets on eating behavior, feather pecking and performance in laying hens. From This study it could be concluded that increasing feeding related behavior and satiety by dietary manipulation are successful strategies in preventing feather pecking behavior, as long as this behavior is not developed in an earlier stage. In laying hens, nutrient dilution and addition of (coarse) insoluble NSP increase feeding related behavior, as expressed by prolonged eating time and decreased eating rate. Providing 15% diluted diets to rearing hens results in less feather damage during the laying period. Although dilution of the rearing diet does not prolong eating time in this stage, this might stimulate imprinting of pecks on feed, rather than on feathers of flock mates. Feeding related behavior and satiety of laying hens are mostly affected by eating diets with a high insoluble NSP content. Additive effects, however, are found if dietary energy content is reduced and the NSP source is coarsely ground. The most perspective feeding strategy to prevent feather damage is the supply of a 15% diluted diet during the rearing period, followed by a 10% diluted - coarsely ground - high NSP diet during the laying period.

ISBN: 9798516032127Subjects--Topical Terms:

3685207
Foraging behavior.

Impact of Nutritional Factors on Eating Behavior and Feather Damage of Laying Hens.
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506 $a This item must not be sold to any third party vendors.
520 $a Feather pecking remains one of the major problems facing the poultry industry. It is assumed that feather pecking behavior is a substitute for normal ground pecking or feeding behavior in the absence of adequate foraging incentives. This justifies a nutritional approach of this problem. Although energy and Non Starch Polysaccharides (NSP) concentrations and particle size of the added NSP source seem to reduce feather pecking behavior in laying hens, these nutritional factors were often confounded in experimental diets. Consequently, it's not clear which factor is most effective in causing these positive effects. In this project, the relationships between feed characteristics - satiety/ development of gut segments - feeding related behavior - feather pecking behavior are studied. The objectives of the present study were: 1. To review the impact of nutritional factors and feeding strategies on feather pecking behavior in laying hens. 2. To determine the independent effects of nutrient density, NSP concentration, and particle sizes of NSP on eating behavior, feather pecking, performance and digesta mean retention time in laying hens between 18 and 40 wk of age. 3. To investigate the carryCover effects of nutrient density and NSP concentration in rearing diets on eating behavior, feather pecking and performance in laying hens. From This study it could be concluded that increasing feeding related behavior and satiety by dietary manipulation are successful strategies in preventing feather pecking behavior, as long as this behavior is not developed in an earlier stage. In laying hens, nutrient dilution and addition of (coarse) insoluble NSP increase feeding related behavior, as expressed by prolonged eating time and decreased eating rate. Providing 15% diluted diets to rearing hens results in less feather damage during the laying period. Although dilution of the rearing diet does not prolong eating time in this stage, this might stimulate imprinting of pecks on feed, rather than on feathers of flock mates. Feeding related behavior and satiety of laying hens are mostly affected by eating diets with a high insoluble NSP content. Additive effects, however, are found if dietary energy content is reduced and the NSP source is coarsely ground. The most perspective feeding strategy to prevent feather damage is the supply of a 15% diluted diet during the rearing period, followed by a 10% diluted - coarsely ground - high NSP diet during the laying period.
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650 4 $a Physiology. $3 518431
650 4 $a Animal feathers. $3 3688663
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