M. Campler, M. Pairis-Garcia, J. Rault, G. Coleman, A. Arruda
Implementing timely and humane euthanasia on-farm is of key importance for safeguarding animal welfare. Equally important is the skill, attitude, and knowledge among caretakers to successfully perform euthanasia on-farm. This study investigated the potential of an interactive euthanasia training program in conjunction with a survey designed to investigate attitudes and perceived knowledge of the Common Swine Industry Audit euthanasia guidelines. The survey results showed that caretakers self-reported improved knowledge of industry expectations immediately post training compared to their perceived knowledge pre-training. This study provides insight regarding interactive training programs and identifies variation in perceived euthanasia knowledge within swine caretaker demographics.
{"title":"Interactive euthanasia training program for swine caretakers; a study on program implementation and perceived caretaker knowledge","authors":"M. Campler, M. Pairis-Garcia, J. Rault, G. Coleman, A. Arruda","doi":"10.54846/jshap/1173","DOIUrl":"https://doi.org/10.54846/jshap/1173","url":null,"abstract":"Implementing timely and humane euthanasia on-farm is of key importance for safeguarding animal welfare. Equally important is the skill, attitude, and knowledge among caretakers to successfully perform euthanasia on-farm. This study investigated the potential of an interactive euthanasia training program in conjunction with a survey designed to investigate attitudes and perceived knowledge of the Common Swine Industry Audit euthanasia guidelines. The survey results showed that caretakers self-reported improved knowledge of industry expectations immediately post training compared to their perceived knowledge pre-training. This study provides insight regarding interactive training programs and identifies variation in perceived euthanasia knowledge within swine caretaker demographics.","PeriodicalId":17095,"journal":{"name":"Journal of Swine Health and Production","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49278845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. Trevisan, R. Robbins, J. Angulo, L. Dufresne, W. Lopez, Nubia R. Macedo, D. Linhares
Objective: Describe the relationship of weekly breeding herd status based on processing fluid (PF) testing for porcine reproductive and respiratory syndrome virus (PRRSV) RNA by quantitative reverse transcriptase-polymerase chain reaction (qRT-PCR) on subsequent viral shedding and cumulative mortality during the nursery phase. Materials and methods: Weekly cohorts (n = 121) of newborn piglets were classified into PRRSV exposure groups according to PRRSV detection in PF: low (quantification cycles [Cq] ≤ 27), medium (27 < Cq ≤ 34), high (34 < Cq ≤ 37), and negative (Cq > 37). At 6 weeks of age, oral fluids (OF) were collected from a subset of 41 cohorts, tested by qRT-PCR, and results used to classify the nursery shedding status into the same aforementioned categories. Cumulative nursery mortality was recorded for all 121 cohorts and compared between the different PRRSV exposure groups. Test agreement was assessed between PF and OF results of 41 cohorts. Moreover, the effect of 4:1 OF pooling on the probability of testing qRT-PCR-positive was evaluated. Results: The nursery mortality for low Cq cohorts was 3.40 percentage points (range, 3.28-3.99) higher than other exposure groups. Overall, Cq values were higher in PF than in OF samples, and fair agreement (κ = 0.2398) between PF and OF was encountered. Compared to individual samples, 4:1 OF pooling resulted in 100% specificity and 76.92% sensitivity. Implications: Weekly PF testing for PRRSV allowed for exposure group classification for each pig batch produced, which was a good predictor of subsequent cumulative nursery mortality.
{"title":"Relationship between weekly porcine reproductive and respiratory syndrome virus exposure in breeding herds and subsequent viral shedding and mortality in the nursery","authors":"G. Trevisan, R. Robbins, J. Angulo, L. Dufresne, W. Lopez, Nubia R. Macedo, D. Linhares","doi":"10.54846/jshap/1177","DOIUrl":"https://doi.org/10.54846/jshap/1177","url":null,"abstract":"Objective: Describe the relationship of weekly breeding herd status based on processing fluid (PF) testing for porcine reproductive and respiratory syndrome virus (PRRSV) RNA by quantitative reverse transcriptase-polymerase chain reaction (qRT-PCR) on subsequent viral shedding and cumulative mortality during the nursery phase. Materials and methods: Weekly cohorts (n = 121) of newborn piglets were classified into PRRSV exposure groups according to PRRSV detection in PF: low (quantification cycles [Cq] ≤ 27), medium (27 < Cq ≤ 34), high (34 < Cq ≤ 37), and negative (Cq > 37). At 6 weeks of age, oral fluids (OF) were collected from a subset of 41 cohorts, tested by qRT-PCR, and results used to classify the nursery shedding status into the same aforementioned categories. Cumulative nursery mortality was recorded for all 121 cohorts and compared between the different PRRSV exposure groups. Test agreement was assessed between PF and OF results of 41 cohorts. Moreover, the effect of 4:1 OF pooling on the probability of testing qRT-PCR-positive was evaluated. Results: The nursery mortality for low Cq cohorts was 3.40 percentage points (range, 3.28-3.99) higher than other exposure groups. Overall, Cq values were higher in PF than in OF samples, and fair agreement (κ = 0.2398) between PF and OF was encountered. Compared to individual samples, 4:1 OF pooling resulted in 100% specificity and 76.92% sensitivity. Implications: Weekly PF testing for PRRSV allowed for exposure group classification for each pig batch produced, which was a good predictor of subsequent cumulative nursery mortality.","PeriodicalId":17095,"journal":{"name":"Journal of Swine Health and Production","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48549406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Castevens, J. B. Ferreira, T. Gillespie, C. Olsen, J. Nielsen, G. Almond
The study objective was to determine if sows are anemic at any reproductive stage or parity. Hemoglobin concentrations were determined for 2683 sows from 11 farms. The overall trend was for hemoglobin concentrations to peak during mid-gestation and reach a nadir in early lactation when most (74.2%) sows were anemic.
{"title":"Assessment of hemoglobin concentration in relation to sow reproductive stage and parity","authors":"K. Castevens, J. B. Ferreira, T. Gillespie, C. Olsen, J. Nielsen, G. Almond","doi":"10.54846/jshap/1182","DOIUrl":"https://doi.org/10.54846/jshap/1182","url":null,"abstract":"The study objective was to determine if sows are anemic at any reproductive stage or parity. Hemoglobin concentrations were determined for 2683 sows from 11 farms. The overall trend was for hemoglobin concentrations to peak during mid-gestation and reach a nadir in early lactation when most (74.2%) sows were anemic.","PeriodicalId":17095,"journal":{"name":"Journal of Swine Health and Production","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46063980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Objective: Determine the effects of dietary copper on growth in pigs given iron at weaning. Materials and methods: Weanlings (n = 144) were allocated to a 2 × 2 × 2 factorial arrangement of treatments (6 pens/treatment, 3 pigs/pen). Factors were size (large or small), 100 mg intramuscular iron doses (birth or birth and weaning), and dietary copper (14.2 or 250 ppm). Average daily gain (ADG), feed intake (ADFI), and gain to feed ratio were determined for 49 days. Blood was sampled at weaning and days 7 and 49. Results: Hemoglobin (P < .001) and hematocrit (P = .002) at weaning were less in large pigs. Pigs receiving two doses of iron had greater hemoglobin (P = .05) and hematocrit (P = .04). Hemoglobin (P = .03) and hematocrit (P = .03) were greater in pigs fed the control diet. In large pigs only, body weights at day 49 were greater (P = .05) for individuals receiving two doses of iron. The interaction between number of iron doses and diet affected many growth measures including ADG (P = .02) and ADFI (P = .04) for the overall trial. In all cases, performance was greater in copper-fed pigs receiving two doses of iron. Implications: At weaning, larger pigs had hematology characteristics consistent with a lower iron status. Iron treatment at weaning increased hemoglobin. Copper enhanced growth only if pigs received iron at weaning. In copper-fed pigs, hemoglobin was less, possibly indicating a negative effect on iron absorption.
{"title":"Growth performance and hematology characteristics in pigs treated with iron at weaning as influenced by nursery diets supplemented with copper","authors":"M. Estienne, S. Clark-Deener, K. Williams","doi":"10.54846/jshap/1165","DOIUrl":"https://doi.org/10.54846/jshap/1165","url":null,"abstract":"Objective: Determine the effects of dietary copper on growth in pigs given iron at weaning. Materials and methods: Weanlings (n = 144) were allocated to a 2 × 2 × 2 factorial arrangement of treatments (6 pens/treatment, 3 pigs/pen). Factors were size (large or small), 100 mg intramuscular iron doses (birth or birth and weaning), and dietary copper (14.2 or 250 ppm). Average daily gain (ADG), feed intake (ADFI), and gain to feed ratio were determined for 49 days. Blood was sampled at weaning and days 7 and 49. Results: Hemoglobin (P < .001) and hematocrit (P = .002) at weaning were less in large pigs. Pigs receiving two doses of iron had greater hemoglobin (P = .05) and hematocrit (P = .04). Hemoglobin (P = .03) and hematocrit (P = .03) were greater in pigs fed the control diet. In large pigs only, body weights at day 49 were greater (P = .05) for individuals receiving two doses of iron. The interaction between number of iron doses and diet affected many growth measures including ADG (P = .02) and ADFI (P = .04) for the overall trial. In all cases, performance was greater in copper-fed pigs receiving two doses of iron. Implications: At weaning, larger pigs had hematology characteristics consistent with a lower iron status. Iron treatment at weaning increased hemoglobin. Copper enhanced growth only if pigs received iron at weaning. In copper-fed pigs, hemoglobin was less, possibly indicating a negative effect on iron absorption.","PeriodicalId":17095,"journal":{"name":"Journal of Swine Health and Production","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43705869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Dee, Jon A. DeJong, C. Neill, B. Ratliff, Aaron Singrey, E. Hansen, E. Nelson, J. Keegan, A. Gaines
Survivability and infectivity of porcine epidemic diarrhea virus within complete feed was tested in the presence or absence of a dry lactic acid-based feed acidifier product (Guardicate) at levels of 0.75%, 1.0%, or 1.5%. The virus was inactivated, and contaminated feed did not cause infection at all three inclusion rates.
{"title":"Inactivation of porcine epidemic diarrhea virus in contaminated swine feed through inclusion of a dry lactic acid-based product","authors":"S. Dee, Jon A. DeJong, C. Neill, B. Ratliff, Aaron Singrey, E. Hansen, E. Nelson, J. Keegan, A. Gaines","doi":"10.54846/jshap/1175","DOIUrl":"https://doi.org/10.54846/jshap/1175","url":null,"abstract":"Survivability and infectivity of porcine epidemic diarrhea virus within complete feed was tested in the presence or absence of a dry lactic acid-based feed acidifier product (Guardicate) at levels of 0.75%, 1.0%, or 1.5%. The virus was inactivated, and contaminated feed did not cause infection at all three inclusion rates.","PeriodicalId":17095,"journal":{"name":"Journal of Swine Health and Production","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44643009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Karli J. Lane, Anna K. Johnson, Carson E. J. Stilwill, L. Karriker, J. Harmon, K. Stalder
Objectives: To determine the effect of heat lamps versus heat mats on piglet performance measures, sow lying behavior, piglet behavior, and energy use. Materials and methods: Seventeen multiparous crossbred sows housed in farrowing stalls were randomly assigned to one of two heat source treatments: Baby Pig Heat Mat - Single 48 (MAT; n = 8) or Poly Heat Lamp Fixture (LAMP; n = 9). Piglets were weighed on day 1 and at weaning and any mortalities were recorded to evaluate piglet production measures. For 7 days over the course of lactation (day 1, 2, 3, 4, 5, week before weaning, and day before weaning), sows and their litters were observed for 2 hours twice daily to evaluate behavior. Electric meters were attached to individual heat source units to monitor energy use. Results: Piglet production parameters were unaffected by treatment type; litter weaning weight (P = .85), litter average daily gain (P = .79), and preweaning mortality (P = .58). Piglet behavior had variation in the number of piglets using a heat source within day across treatments (P < .001). The number of piglets in contact with the sow decreased during early lactation for both treatment types and increased during late lactation with more MAT pigs tending to be in contact with the sow (P < .001). Implications: Using heat mats as supplemental heat in the farrowing house may result in decreased energy use and increased savings without hindering piglet production parameters.
{"title":"Comparison of heat lamps and heat mats in the farrowing house: effect on piglet production, energy use, and piglet and sow behavior through live observation","authors":"Karli J. Lane, Anna K. Johnson, Carson E. J. Stilwill, L. Karriker, J. Harmon, K. Stalder","doi":"10.54846/jshap/1188","DOIUrl":"https://doi.org/10.54846/jshap/1188","url":null,"abstract":"Objectives: To determine the effect of heat lamps versus heat mats on piglet performance measures, sow lying behavior, piglet behavior, and energy use. Materials and methods: Seventeen multiparous crossbred sows housed in farrowing stalls were randomly assigned to one of two heat source treatments: Baby Pig Heat Mat - Single 48 (MAT; n = 8) or Poly Heat Lamp Fixture (LAMP; n = 9). Piglets were weighed on day 1 and at weaning and any mortalities were recorded to evaluate piglet production measures. For 7 days over the course of lactation (day 1, 2, 3, 4, 5, week before weaning, and day before weaning), sows and their litters were observed for 2 hours twice daily to evaluate behavior. Electric meters were attached to individual heat source units to monitor energy use. Results: Piglet production parameters were unaffected by treatment type; litter weaning weight (P = .85), litter average daily gain (P = .79), and preweaning mortality (P = .58). Piglet behavior had variation in the number of piglets using a heat source within day across treatments (P < .001). The number of piglets in contact with the sow decreased during early lactation for both treatment types and increased during late lactation with more MAT pigs tending to be in contact with the sow (P < .001). Implications: Using heat mats as supplemental heat in the farrowing house may result in decreased energy use and increased savings without hindering piglet production parameters.","PeriodicalId":17095,"journal":{"name":"Journal of Swine Health and Production","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43999755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Tinkle, Mark Wilson, J. Torrison, M. Parsley, Kylee Dubertstein, M. Azain, C. Dove
Objective: To determine the effect of functional claw trimming versus blunt claw trimming on the gait of sows. Materials and methods: Nineteen sows (PIC C29) were transported to the research center and claws were trimmed 3 times over an 8-day period. Dewclaws were trimmed even with the coronary band of the hoof on day 1. Claws were blunt trimmed on day 4 and functional trimming occurred on day 8. The gait of each sow was recorded prior to each trimming to compare the effect of the previous trimming. A final gait recording was taken on day 12. The gait data collected from the sows was compared across days to determine if any changes occurred. Results: Positive improvements in gait data were noted after dewclaw trimming. Changes were seen in velocity (P = .03), stride length (P = .02), stride duration (P = .04), stance (P = .04), and rear percent stance (P = .03). Blunt trimming offset the improvement gained by trimming dewclaws, seen in the changes to rear percent stance (P = .02) and front swing (P = .04). Functional trimming increased the improvement observed by trimming dewclaws. Changes were seen in the stance (P < .001), percent stance (P < .001), stride duration (P = .003), stride length (P = .008), and velocity (P = .003). Implications: Trimming dewclaws and functionally trimming claws improved the sow’s gait. Blunt trimming did not provide the same benefits observed by trimming dewclaws or functionally trimming the claws.
{"title":"Comparison of blunt versus functional claw trimming effects on sow gait","authors":"A. Tinkle, Mark Wilson, J. Torrison, M. Parsley, Kylee Dubertstein, M. Azain, C. Dove","doi":"10.54846/jshap/1143","DOIUrl":"https://doi.org/10.54846/jshap/1143","url":null,"abstract":"Objective: To determine the effect of functional claw trimming versus blunt claw trimming on the gait of sows. Materials and methods: Nineteen sows (PIC C29) were transported to the research center and claws were trimmed 3 times over an 8-day period. Dewclaws were trimmed even with the coronary band of the hoof on day 1. Claws were blunt trimmed on day 4 and functional trimming occurred on day 8. The gait of each sow was recorded prior to each trimming to compare the effect of the previous trimming. A final gait recording was taken on day 12. The gait data collected from the sows was compared across days to determine if any changes occurred. Results: Positive improvements in gait data were noted after dewclaw trimming. Changes were seen in velocity (P = .03), stride length (P = .02), stride duration (P = .04), stance (P = .04), and rear percent stance (P = .03). Blunt trimming offset the improvement gained by trimming dewclaws, seen in the changes to rear percent stance (P = .02) and front swing (P = .04). Functional trimming increased the improvement observed by trimming dewclaws. Changes were seen in the stance (P < .001), percent stance (P < .001), stride duration (P = .003), stride length (P = .008), and velocity (P = .003). Implications: Trimming dewclaws and functionally trimming claws improved the sow’s gait. Blunt trimming did not provide the same benefits observed by trimming dewclaws or functionally trimming the claws.","PeriodicalId":17095,"journal":{"name":"Journal of Swine Health and Production","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48531941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
L. Thomas, R. Goodband, S. Dritz, M. Tokach, J. Woodworth, J. DeRouchey
The objective of this paper is to describe a production tool for swine producers, veterinarians, and nutritionists to benchmark feed usage and feed cost within gestation, lactation, and gilt development phases of a production system. The model was developed using Microsoft Excel (version 16.0.11328.20438) and includes key variables within the breeding herd affecting feed usage. Data from a commercial production system was used to determine model accuracy as well as demonstrate its use. The results from this production tool provide estimates for feed usage and feed cost within each subpopulation of animals in the breeding herd.
{"title":"Calculating breeding herd feed usage and cost in commercial production systems","authors":"L. Thomas, R. Goodband, S. Dritz, M. Tokach, J. Woodworth, J. DeRouchey","doi":"10.54846/jshap/1168","DOIUrl":"https://doi.org/10.54846/jshap/1168","url":null,"abstract":"The objective of this paper is to describe a production tool for swine producers, veterinarians, and nutritionists to benchmark feed usage and feed cost within gestation, lactation, and gilt development phases of a production system. The model was developed using Microsoft Excel (version 16.0.11328.20438) and includes key variables within the breeding herd affecting feed usage. Data from a commercial production system was used to determine model accuracy as well as demonstrate its use. The results from this production tool provide estimates for feed usage and feed cost within each subpopulation of animals in the breeding herd.","PeriodicalId":17095,"journal":{"name":"Journal of Swine Health and Production","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45598760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ella Akin, Anna K. Johnson, S. Millman, Cassandra Jass, K. Stalder, John P. Stinn, J. Ross
The National Pork Board provides recommendations for humane handling tools and non-ambulatory pig handling methods. However, there are limited published studies that evaluate the efficacy of handling tools for on-farm manual movement of grow-finish non-ambulatory or cadaver pigs. A sked, deer sled, and modified deer sled were studied as handling tools for non-ambulatory grow-finish pigs. Handling tools were tested on-farm using pig cadavers (59-134 kg) to evaluate effectiveness based on employee effort and opinion. Our results support the sked and deer sled as effective handling tools to move grow-finish pigs, while the modified deer sled was ineffective.
{"title":"Alternative handling tools for moving grow-finish pig cadavers","authors":"Ella Akin, Anna K. Johnson, S. Millman, Cassandra Jass, K. Stalder, John P. Stinn, J. Ross","doi":"10.54846/jshap/1155","DOIUrl":"https://doi.org/10.54846/jshap/1155","url":null,"abstract":"The National Pork Board provides recommendations for humane handling tools and non-ambulatory pig handling methods. However, there are limited published studies that evaluate the efficacy of handling tools for on-farm manual movement of grow-finish non-ambulatory or cadaver pigs. A sked, deer sled, and modified deer sled were studied as handling tools for non-ambulatory grow-finish pigs. Handling tools were tested on-farm using pig cadavers (59-134 kg) to evaluate effectiveness based on employee effort and opinion. Our results support the sked and deer sled as effective handling tools to move grow-finish pigs, while the modified deer sled was ineffective.","PeriodicalId":17095,"journal":{"name":"Journal of Swine Health and Production","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41613196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Faccin, F. Laskoski, H. Cemin, A. Mellagi, M. Bernardi, Rafael R. Ulguim Dvm, F. P. Bortolozzo, M. Tokach
Objective: Determine the effects of nursery pig weaning weight (WW) and first week postweaning growth rate (ADG7) on average daily gain (ADG), final weight, removals, and mortality under field conditions. Materials and methods: In this 42-day study, 1602 pigs (mean [SD] weight: 5.42 [0.9] kg) were weaned at 19 to 21 days of age. Four successive batches of weaned pigs were moved into the same nursery room. Within each batch, pigs were allotted by WW to have approximately one-third of each class (LightWW, MediumWW, and HeavyWW) in all pens. On day 7, pigs were individually weighed and designated according to their ADG7 into four classes within their batch: NegativeADG7, LowADG7, MediumADG7, and HighADG7. An equation was developed and validated to quantify the association between WW and ADG7 with ADG. Results: Weaning weight had no effect on ADG7 (P = .42), but increasing WW and ADG7 increased (P < .001) ADG and final weight at 42 days. Pig removal was reduced if pigs had heavy WW or gained weight in the first week after weaning (≤ 3.2%) compared to pigs that lost weight during the first week in the LightWW (20.9%) or MediumWW (10.3%) categories. Overall mortality was 1.1% with no effects of WW, ADG7, or its interaction (P > .54). The equation generated indicated that WW and ADG7 together had moderate accuracy (R² = 0.54; P < .001) to predict ADG. Implication: The WW and ADG7 are not correlated, but they affect and partially predict the overall nursery performance.
{"title":"Evaluating the impact of weaning weight and growth rate during the first week post weaning on overall nursery performance","authors":"J. Faccin, F. Laskoski, H. Cemin, A. Mellagi, M. Bernardi, Rafael R. Ulguim Dvm, F. P. Bortolozzo, M. Tokach","doi":"10.54846/jshap/1138","DOIUrl":"https://doi.org/10.54846/jshap/1138","url":null,"abstract":"Objective: Determine the effects of nursery pig weaning weight (WW) and first week postweaning growth rate (ADG7) on average daily gain (ADG), final weight, removals, and mortality under field conditions. Materials and methods: In this 42-day study, 1602 pigs (mean [SD] weight: 5.42 [0.9] kg) were weaned at 19 to 21 days of age. Four successive batches of weaned pigs were moved into the same nursery room. Within each batch, pigs were allotted by WW to have approximately one-third of each class (LightWW, MediumWW, and HeavyWW) in all pens. On day 7, pigs were individually weighed and designated according to their ADG7 into four classes within their batch: NegativeADG7, LowADG7, MediumADG7, and HighADG7. An equation was developed and validated to quantify the association between WW and ADG7 with ADG. Results: Weaning weight had no effect on ADG7 (P = .42), but increasing WW and ADG7 increased (P < .001) ADG and final weight at 42 days. Pig removal was reduced if pigs had heavy WW or gained weight in the first week after weaning (≤ 3.2%) compared to pigs that lost weight during the first week in the LightWW (20.9%) or MediumWW (10.3%) categories. Overall mortality was 1.1% with no effects of WW, ADG7, or its interaction (P > .54). The equation generated indicated that WW and ADG7 together had moderate accuracy (R² = 0.54; P < .001) to predict ADG. Implication: The WW and ADG7 are not correlated, but they affect and partially predict the overall nursery performance.","PeriodicalId":17095,"journal":{"name":"Journal of Swine Health and Production","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46184942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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