Pendulous Crop in Broilers

Ebling, PD; Pontalti, GC; Villanueva, A.E.; Ribeiro, Aml

doi:10.1590/1516-635x1703395-398

Cited by 4 publications

(4 citation statements)

References 3 publications

(3 reference statements)

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“…The condition is more prevalent in turkeys, but can be found in broiler chickens and occasionally occurs at relatively high levels (Ebling et al, 2015). Despite the usually low incidence, research on pendulous crop may provide clues on management and nutrition required to produce a 'healthy' crop.…”

Section: Pendulous Cropmentioning

confidence: 99%

The role of the crop in poultry production

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Apajalahti

Svihus

et al. 2016

World's Poultry Science Journal

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The importance of the crop is often underestimated in poultry production. In addition to storing ingested feed, it also can impact nutrient digestion by digesta softening and the initial activity of feed (endogenous and exogenous) and microbial enzymes. The crop represents the first major defence against poultry pathogens and zoonotic organisms with well established adaptive and innate immune function, and a lactobacilli dominated microbiota capable of reducing the passage of these organisms further along the digestive tract. However, the potential to improve bird productivity and health, as well as affect meat and egg safety, are influenced by the nature of the diet, and in particular feed entry and extended presence in the crop. This is required to promote lactobacilli fermentation, the production of lactic acid and other volatile fatty acids, and the lowering of crop pH. Management practices such as meal feeding and the use of lighting programs with extended dark periods encourage crop utilisation. Further, the use of feed additives such as prebiotics and probiotics may enhance crop function, which in turn contributes to well-being of the entire digestive tract. A healthy and functional crop, along with other segments of digestive tract, has increased importance in an era of reduced antibiotic use in poultry feeds.

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Section: Pendulous Cropmentioning

confidence: 99%

The role of the crop in poultry production

Classen

Apajalahti

Svihus

et al. 2016

World's Poultry Science Journal

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“…Pendulous crop ( PC ) syndrome is characterized by loss of muscle tone and distention of the crop which prolapses in front of the supportive tissue layers ( Hinshaw, 2003 ; Ebling et al, 2015 ; Crespo, 2019 ; Çelik and Kıvanç, 2020 ), resulting in the crop not functioning as it should. PC cannot be identified early and there is no treatment, meaning that the crop never returns to its normal position ( Hinshaw, 2003 ).…”

Section: Introductionmentioning

confidence: 99%

“…PC cannot be identified early and there is no treatment, meaning that the crop never returns to its normal position ( Hinshaw, 2003 ). Birds continue to eat but, the flow of feed from the crop to the proventriculus-gizzard is impaired due to the reduced muscle function ( Ebling et al, 2015 ; Crespo, 2019 ). This can lead to impaired nutrition digestion and absorption in the digestive tract, ulceration of the crop lining, and ultimately, emaciation and mortality ( Crespo, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

“…As such, the main strategy is to cull birds with PC to avoid decreased bird well-being and financial losses due to reduced feed efficiency and carcass condemnation. Even though live weight can be normal, birds with PC generally have significantly lower carcass weight ( Ebling et al, 2015 ). Hence, PC is a serious issue in poultry production from both a production and animal welfare perspective.…”

Section: Introductionmentioning

confidence: 99%

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Accuracy of genomic selection for reducing susceptibility to pendulous crop in turkey (Meleagris gallopavo)

et al. 2022

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Pendulous crop ( PC ) in the turkey occurs when the crop distends from its normal position, thereby preventing the movement of feed and water from the crop down into the digestive system. This condition negatively impacts the turkey industry at both production and welfare levels. In this study, we estimated the genetic parameters for PC incidence and its genetic correlation with 5 production traits. Additionally, we evaluated the prediction accuracy and bias of breeding values for the selection candidates using pedigree ( BLUP ) or pedigree-genomic ( ssGBLUP ) relationships among the animals. A total of 245,783 turkey records were made available by Hybrid Turkeys, Kitchener, Canada. Of these, 6,545 were affected with PC. In addition, the data included 9,634 records for breast meat yield ( BMY ); 5,592 records for feed conversion ratio ( FCR ) and residual feed intake ( RFI ) in males; 170,844 records for body weight ( BW ) and walking score ( WS ) between 18 and 20 wk of age for males (71,012) and females (99,832), respectively. Among this population, 36,830 were genotyped using a 65K SNP Illumina Inc. chip. While all animals passed the quality control criteria, only 53,455 SNP markers were retained for subsequent analysis. Heritability for PC was estimated at 0.16 ± 0.00 and 0.17 ± 0.00 using BLUP and ssGBLUP, respectively. The incidence of PC was not genetically correlated with WS or FCR. Low unfavourable genetic correlations with BW (0.12 and 0.14), BMY (0.24 and 0.24) and RFI (−0.33 and −0.28) were obtained using BLUP and ssGBLUP, respectively. Using ssGBLUP showed higher prediction accuracy (0.51) for the breeding values for the selection candidates than the pedigree-based model (0.35). Whereas the bias of the prediction was slightly reduced with ssGBLUP (0.33 ± 0.05) than BLUP (0.30 ± 0.08), both models showed a regression coefficient lower than one, indicating inflation in the predictions. The results of this study suggest that PC is a heritable trait and selection for lower PC incidence rates is feasible. Although further investigation is necessary, selection for BW, BMY, and RFI may increase PC incidence. Incorporating genomic information would lead to higher accuracy in predicting the genetic merit for selection candidates.

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Long-Term Prognosis and Treatment of Crop Impaction in Chickens via Ingluviotomy with Local Infiltration Anesthetic: Case Report

Lin¹

2022

Avian Diseases

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Pendulous Crop in Broilers

Cited by 4 publications

References 3 publications

The role of the crop in poultry production

The role of the crop in poultry production

Accuracy of genomic selection for reducing susceptibility to pendulous crop in turkey (Meleagris gallopavo)

Long-Term Prognosis and Treatment of Crop Impaction in Chickens via Ingluviotomy with Local Infiltration Anesthetic: Case Report

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