L. Bean-Hodgins, M. Mohammadigheisar, A. M. Edwards, Elijah G. Kiarie
Plasma and tibia attributes were investigated in broiler chickens raised on three gut health management programs in commercial farms (study 1) and research station settings (study 2). The programs were: 1) conventional antibiotics (CON), 2) raised without medically important antimicrobials (RWMIA), and 3) raised without antibiotics (RWA). Birds had free access to feed and water from placement to harvest; samples of blood and left tibia were collected on d 28 in both studies and further samples were taken on d 41 in study 2. In both studies, there were no program differences (P > 0.05) on plasma metabolites with exception of enzyme concentrations with notably higher levels of circulating plasma alkaline phosphatase (ALP) in birds reared on the RWA program (P ≤ 0.04). Differences were observed among programs for tibia length in both studies (P < 0.05). Birds reared on RWMIA exhibited significantly (P = 0.016) higher tibia ash than CON on d 41. Observed differences in the plasma enzyme concentrations, tibia length, and ash concentration suggest altered metabolism which could be linked to gut health management programs and their ability to support gut integrity and function in the absence of antibiotics.
{"title":"Comparative impact of conventional and alternative gut health management programs on plasma and tibia attributes in broiler chickens raised in commercial and research settings","authors":"L. Bean-Hodgins, M. Mohammadigheisar, A. M. Edwards, Elijah G. Kiarie","doi":"10.1139/cjas-2024-0023","DOIUrl":"https://doi.org/10.1139/cjas-2024-0023","url":null,"abstract":"Plasma and tibia attributes were investigated in broiler chickens raised on three gut health management programs in commercial farms (study 1) and research station settings (study 2). The programs were: 1) conventional antibiotics (CON), 2) raised without medically important antimicrobials (RWMIA), and 3) raised without antibiotics (RWA). Birds had free access to feed and water from placement to harvest; samples of blood and left tibia were collected on d 28 in both studies and further samples were taken on d 41 in study 2. In both studies, there were no program differences (P > 0.05) on plasma metabolites with exception of enzyme concentrations with notably higher levels of circulating plasma alkaline phosphatase (ALP) in birds reared on the RWA program (P ≤ 0.04). Differences were observed among programs for tibia length in both studies (P < 0.05). Birds reared on RWMIA exhibited significantly (P = 0.016) higher tibia ash than CON on d 41. Observed differences in the plasma enzyme concentrations, tibia length, and ash concentration suggest altered metabolism which could be linked to gut health management programs and their ability to support gut integrity and function in the absence of antibiotics.","PeriodicalId":9512,"journal":{"name":"Canadian Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141807239","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}
Aloma Zoratti, Jéssica Gonçalves Vero, J. Genova, N. Devillers, S. Conte, A. Bridi, E. Piasentier, L. Faucitano
Behaviour, heart rate (HR) and blood lactate concentration of 144 pigs, equally distributed into lighter (L, 122 kg on average) and heavier (H, 153 kg on average) groups, were assessed to study the effects of slaughter weight on pigs’ response to a simulated loading and unloading procedure using four ramp configurations, i.e., 0º (level ramp), 15º slope and 1.66 m length, 15º slope and 2.71 m length (15ºLO), and 25º slope and 1.66 m. No interaction was found between ramp configuration and slaughter weight (P > 0.10). The frequencies of pigs’ slips or falls (P = 0.01) increased on sloped ramps compared to the floor level (Padj < 0.05), and pigs jumped-off more from the 25° than the 15°LO ramp (Padj = 0.05). Pigs negotiating the 25° slope ramp presented a higher concentration of blood lactate than those walking at the floor level (P = 0.02). When compared to L pigs, H pigs were more reluctant to move (P = 0.05) and, presented higher increments of HR (ΔHR) during handling (P = 0.03). In conclusion, heavier pigs were more difficult to handle, regardless of the ramp steepness, which alone reduced ease of handling and affected the physiological condition of pigs.
{"title":"Simulation of loading and unloading through ramps of different configuration: effects on the ease of handling and physiological response of pigs of two slaughter weights","authors":"Aloma Zoratti, Jéssica Gonçalves Vero, J. Genova, N. Devillers, S. Conte, A. Bridi, E. Piasentier, L. Faucitano","doi":"10.1139/cjas-2024-0029","DOIUrl":"https://doi.org/10.1139/cjas-2024-0029","url":null,"abstract":"Behaviour, heart rate (HR) and blood lactate concentration of 144 pigs, equally distributed into lighter (L, 122 kg on average) and heavier (H, 153 kg on average) groups, were assessed to study the effects of slaughter weight on pigs’ response to a simulated loading and unloading procedure using four ramp configurations, i.e., 0º (level ramp), 15º slope and 1.66 m length, 15º slope and 2.71 m length (15ºLO), and 25º slope and 1.66 m. No interaction was found between ramp configuration and slaughter weight (P > 0.10). The frequencies of pigs’ slips or falls (P = 0.01) increased on sloped ramps compared to the floor level (Padj < 0.05), and pigs jumped-off more from the 25° than the 15°LO ramp (Padj = 0.05). Pigs negotiating the 25° slope ramp presented a higher concentration of blood lactate than those walking at the floor level (P = 0.02). When compared to L pigs, H pigs were more reluctant to move (P = 0.05) and, presented higher increments of HR (ΔHR) during handling (P = 0.03). In conclusion, heavier pigs were more difficult to handle, regardless of the ramp steepness, which alone reduced ease of handling and affected the physiological condition of pigs.","PeriodicalId":9512,"journal":{"name":"Canadian Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141806461","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}
C. Plett, Nancy L. McLean, Carole Lafreniere, Shabtai Bittman, Kim Ominski, J.C. Plaizier
Production practices for first cut alfalfa (ALF), alfalfa-grass (AFG) and grass silages (GRS) were surveyed on dairy farms in four Canadian regions, i.e. British Columbia (BC, n=21), Prairies (PRA, n=32), Central Canada (CEN, n=218), and Atlantic Canada (ATL, n=17). Results are presented as percentages of responses by region; forage type, silo type, wilting method and inoculant use varied among regions. In CEN (93.0%), ATL (88.2%), and PRA (68.8%) AFG was most common. In BC, GRS was most common (66.7%). ALF was only reported in the PRA (28.1%) and CEN (5.6%). Respondents from BC only reported bunkers (52.4%) and baleage (28.6%). Bunkers were most common in PRA (31.3%), followed by baleage (28.1%), piles (18.8%) and tower silos (6.3%). In CEN tower silos were most common (37.2%), followed by bunkers (33.9%), baleage (22.0%), and piles (1.8%). In ATL bunkers (29.4%) and baleage (29.4%) were most common, followed by tower silos (17.7%), and piles (11.8%). Wilting was mostly done in windrows: BC (55.0%), PRA (45.0%), CEN (77.1%), and ATL (71.0%). In BC and ATL, 45% and 17.7%, respectively, of respondents used tedders to enhance wilting. In BC, CEN, ATL, and PRA, 55%, 58.3%, 64.7% and 44.8% respectively of respondents used inoculants.
{"title":"Characterization of First Cut Alfalfa and Grass Silage Management Practices on Canadian Dairy Farms","authors":"C. Plett, Nancy L. McLean, Carole Lafreniere, Shabtai Bittman, Kim Ominski, J.C. Plaizier","doi":"10.1139/cjas-2024-0010","DOIUrl":"https://doi.org/10.1139/cjas-2024-0010","url":null,"abstract":"Production practices for first cut alfalfa (ALF), alfalfa-grass (AFG) and grass silages (GRS) were surveyed on dairy farms in four Canadian regions, i.e. British Columbia (BC, n=21), Prairies (PRA, n=32), Central Canada (CEN, n=218), and Atlantic Canada (ATL, n=17). Results are presented as percentages of responses by region; forage type, silo type, wilting method and inoculant use varied among regions. In CEN (93.0%), ATL (88.2%), and PRA (68.8%) AFG was most common. In BC, GRS was most common (66.7%). ALF was only reported in the PRA (28.1%) and CEN (5.6%). Respondents from BC only reported bunkers (52.4%) and baleage (28.6%). Bunkers were most common in PRA (31.3%), followed by baleage (28.1%), piles (18.8%) and tower silos (6.3%). In CEN tower silos were most common (37.2%), followed by bunkers (33.9%), baleage (22.0%), and piles (1.8%). In ATL bunkers (29.4%) and baleage (29.4%) were most common, followed by tower silos (17.7%), and piles (11.8%). Wilting was mostly done in windrows: BC (55.0%), PRA (45.0%), CEN (77.1%), and ATL (71.0%). In BC and ATL, 45% and 17.7%, respectively, of respondents used tedders to enhance wilting. In BC, CEN, ATL, and PRA, 55%, 58.3%, 64.7% and 44.8% respectively of respondents used inoculants.","PeriodicalId":9512,"journal":{"name":"Canadian Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141827718","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}
Sarah E Erickson, Murray Jelinski, Calvin Booker, E. Janzen, K. Schwartzkopf-Genswein
Lameness is the second most prevalent morbidity in North American feedlot cattle and is both an animal welfare and economic concern for the industry. Lameness accounts for 30 to 40% of all feedlot treatments with greater than 70% being foot-related lameness (FRL). This review focused on foot rot (FR), digital dermatitis (DD) and toe tip necrosis syndrome (TTNS). While there are significant study-to-study differences regarding the prevalence of FR, DD and TTNS, it is unequivocal that FR is the most prevalent FRL. Poor pen conditions are risk factors for both FR and DD, but the epidemiology of the two diseases is quite different. Whereas FR is diagnosed throughout the feeding period, DD typically occurs after 80 days on feed (DOF). Toe tip necrosis syndrome is the least prevalent of the three FRL, but has the greatest negative effect on animal welfare and production performance. Most cases of TTNS occur within 50 DOF with treatment failure leading to a significant loss in production performance and even death. This review provides an overview of the epidemiology of lameness in feedlot cattle, with emphasis on the prevalence and risk factors associated with FR, DD and TTNS.
{"title":"A Review of Foot-Related Lameness in Feedlot Cattle","authors":"Sarah E Erickson, Murray Jelinski, Calvin Booker, E. Janzen, K. Schwartzkopf-Genswein","doi":"10.1139/cjas-2024-0047","DOIUrl":"https://doi.org/10.1139/cjas-2024-0047","url":null,"abstract":"Lameness is the second most prevalent morbidity in North American feedlot cattle and is both an animal welfare and economic concern for the industry. Lameness accounts for 30 to 40% of all feedlot treatments with greater than 70% being foot-related lameness (FRL). This review focused on foot rot (FR), digital dermatitis (DD) and toe tip necrosis syndrome (TTNS). While there are significant study-to-study differences regarding the prevalence of FR, DD and TTNS, it is unequivocal that FR is the most prevalent FRL. Poor pen conditions are risk factors for both FR and DD, but the epidemiology of the two diseases is quite different. Whereas FR is diagnosed throughout the feeding period, DD typically occurs after 80 days on feed (DOF). Toe tip necrosis syndrome is the least prevalent of the three FRL, but has the greatest negative effect on animal welfare and production performance. Most cases of TTNS occur within 50 DOF with treatment failure leading to a significant loss in production performance and even death. This review provides an overview of the epidemiology of lameness in feedlot cattle, with emphasis on the prevalence and risk factors associated with FR, DD and TTNS.","PeriodicalId":9512,"journal":{"name":"Canadian Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141659807","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. Y. Mowete, D. Santschi, K. Kwiatkowski, Paula Azevedo, N. De Neve, V. Fievez, J. Plaizier
Relationships between farm and animal factors and the fatty acid (FA) profile and milk amyloid A (MAA) content of milk were determined in 336 Holstein dairy cows on 24 Quebec farms using multiple regression. Cows with a somatic cell count (SCC) above 200,000, and farms feeding palm oil were excluded. Independent factors of the regression models included days in milk (DIM), parity, yield, fat and protein contents of milk, SCC, and the dietary contents of neutral detergent fibre (NDF) and crude fat (CFAT). Non- significant variables with P-values >0.25 were stepwise removed. Models with high fits were those of total short chain FA, medium chain FA, odd- and branched-chain FA (OBCFA), and saturated long chain FA with R2 of 0.33, 0.36, 0.34, and 0.41, respectively. The fat and protein contents and yield of milk did not affect the milk FA profile. Higher NDF increased the milk fat proportions of short chain FA and OBCFA and decreased those of monounsaturated (MUFA) and polyunsaturated FA (PUFA). Higher CFAT reduced this proportion of short chain FA but increased those of MUFA and PUFA. Increasing DIM reduced this proportion of short chain FA and increased that of medium chain FA. Higher SCC increased MAA.
{"title":"Animal and Farm Factors Affecting the Fatty Acid Profile and Amyloid A Concentration of Milk on Quebec Dairy Farms","authors":"S. Y. Mowete, D. Santschi, K. Kwiatkowski, Paula Azevedo, N. De Neve, V. Fievez, J. Plaizier","doi":"10.1139/cjas-2024-0013","DOIUrl":"https://doi.org/10.1139/cjas-2024-0013","url":null,"abstract":"Relationships between farm and animal factors and the fatty acid (FA) profile and milk amyloid A (MAA) content of milk were determined in 336 Holstein dairy cows on 24 Quebec farms using multiple regression. Cows with a somatic cell count (SCC) above 200,000, and farms feeding palm oil were excluded. Independent factors of the regression models included days in milk (DIM), parity, yield, fat and protein contents of milk, SCC, and the dietary contents of neutral detergent fibre (NDF) and crude fat (CFAT). Non- significant variables with P-values >0.25 were stepwise removed. Models with high fits were those of total short chain FA, medium chain FA, odd- and branched-chain FA (OBCFA), and saturated long chain FA with R2 of 0.33, 0.36, 0.34, and 0.41, respectively. The fat and protein contents and yield of milk did not affect the milk FA profile. Higher NDF increased the milk fat proportions of short chain FA and OBCFA and decreased those of monounsaturated (MUFA) and polyunsaturated FA (PUFA). Higher CFAT reduced this proportion of short chain FA but increased those of MUFA and PUFA. Increasing DIM reduced this proportion of short chain FA and increased that of medium chain FA. Higher SCC increased MAA.","PeriodicalId":9512,"journal":{"name":"Canadian Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141668361","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}
Hannah Facey, M. Kithama, M. Mohammadigheisar, S. Barbut, L. Huber, A. Shoveller, Elijah G. Kiarie
We previously reported that high levels (≥50%) of black soldier fly larvae meal (BSFLM) reduced growth and altered organs morphology in broiler chickens. We further examined gastrointestinal, breast, bone, plasma, and litter attributes in broiler chickens fed partial to complete replacement of soybean meal (SBM) with BSFLM. A total of 1,152 d-old Ross × Ross 708 male chicks (n=8) were allocated to 48 pens and assigned one of six diets: a basal corn-SBM diet (0BSFLM), four diets in which SBM in 0BSFLM was replaced with BSFLM at 12.5, 25, 50, and 100% (12.5BSFLM, 25BSFLM, 50BSFLM, 100BSFLM) and a final diet (0+AGP) in which 0BSFLM was fed with coccidiostat and antibiotic. Birds were bled for plasma and necropsied for samples. Litter samples were collected on d 45 to 47. Breast weight, woody breast, and hardness scores and tibia morphometry reduced linearly in response to BSFLM inclusion (P<0.001). BSFLM linearly increased plasma Lys, Met, Thr, uric acid, creatine kinase and decreased Arg and potassium (P<0.05). Litter ammonium nitrogen and potassium decreased linearly in response to BSFLM (P<0.001). In conclusion, the data suggested physiological and metabolic inefficiencies in broiler chickens fed isocaloric and isonitrogenous diets with ≥50% BSFLM replacement of SBM.
{"title":"Complete replacement of soybean meal with black soldier fly larvae meal in feeding program for broiler chickens from placement through to 49 days of age: impact on gastrointestinal, breast, skeletal, plasma, and litter attributes","authors":"Hannah Facey, M. Kithama, M. Mohammadigheisar, S. Barbut, L. Huber, A. Shoveller, Elijah G. Kiarie","doi":"10.1139/cjas-2024-0006","DOIUrl":"https://doi.org/10.1139/cjas-2024-0006","url":null,"abstract":"We previously reported that high levels (≥50%) of black soldier fly larvae meal (BSFLM) reduced growth and altered organs morphology in broiler chickens. We further examined gastrointestinal, breast, bone, plasma, and litter attributes in broiler chickens fed partial to complete replacement of soybean meal (SBM) with BSFLM. A total of 1,152 d-old Ross × Ross 708 male chicks (n=8) were allocated to 48 pens and assigned one of six diets: a basal corn-SBM diet (0BSFLM), four diets in which SBM in 0BSFLM was replaced with BSFLM at 12.5, 25, 50, and 100% (12.5BSFLM, 25BSFLM, 50BSFLM, 100BSFLM) and a final diet (0+AGP) in which 0BSFLM was fed with coccidiostat and antibiotic. Birds were bled for plasma and necropsied for samples. Litter samples were collected on d 45 to 47. Breast weight, woody breast, and hardness scores and tibia morphometry reduced linearly in response to BSFLM inclusion (P<0.001). BSFLM linearly increased plasma Lys, Met, Thr, uric acid, creatine kinase and decreased Arg and potassium (P<0.05). Litter ammonium nitrogen and potassium decreased linearly in response to BSFLM (P<0.001). In conclusion, the data suggested physiological and metabolic inefficiencies in broiler chickens fed isocaloric and isonitrogenous diets with ≥50% BSFLM replacement of SBM.","PeriodicalId":9512,"journal":{"name":"Canadian Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141667092","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}
Goats play a crucial role in providing humans with various types of valuable products including milk and meat. The underlying genetic mechanisms of important morphological aspects remain largely unknown in goats, highlighting the need for further investigation. A genome-wide association analysis (GWAS) was conducted for three morphological phenotypes in Egyptian goats. All animals were genotyped using the Illumina 65K SNP BeadChips. Results of GWAS for wattles identified two significant (P ≤ 1.4x10-6, FDR ≤ 0.05) single nucleotide polymorphisms (SNPs) on chromosome 10 within a region (72-74 Mb) containing FMN1 and GREM1 genes that are important for limb development and growth. For horns, three significant SNPs were identified on chromosome 1 (119-131 Mb) harboring candidate genes for embryonic development and tissue differentiation, such as CEP70, DZIP1L, CLDN18, SOX14 and SLC35G2. For supernumerary teats, four significant SNPs located on chromosomes 25 (8.7 Mb), 9 (47.8 Mb), 17 (45.1 Mb) and 28 (6.7 Mb) were identified, harboring candidate genes involved in morphogenesis and reproductive traits such as EMP2, MDN1, PCDH10 and GHITM. This study identified novel candidate genes alongside previously reported ones in other goat breeds, suggesting their potential as candidate genes for the studied traits in Egyptian goats.
{"title":"Genomic regions underlying variation in wattles, horns and supernumerary teats phenotypes in Egyptian goats","authors":"Ahmed M. A. Sallam","doi":"10.1139/cjas-2023-0109","DOIUrl":"https://doi.org/10.1139/cjas-2023-0109","url":null,"abstract":"Goats play a crucial role in providing humans with various types of valuable products including milk and meat. The underlying genetic mechanisms of important morphological aspects remain largely unknown in goats, highlighting the need for further investigation. A genome-wide association analysis (GWAS) was conducted for three morphological phenotypes in Egyptian goats. All animals were genotyped using the Illumina 65K SNP BeadChips. Results of GWAS for wattles identified two significant (P ≤ 1.4x10-6, FDR ≤ 0.05) single nucleotide polymorphisms (SNPs) on chromosome 10 within a region (72-74 Mb) containing FMN1 and GREM1 genes that are important for limb development and growth. For horns, three significant SNPs were identified on chromosome 1 (119-131 Mb) harboring candidate genes for embryonic development and tissue differentiation, such as CEP70, DZIP1L, CLDN18, SOX14 and SLC35G2. For supernumerary teats, four significant SNPs located on chromosomes 25 (8.7 Mb), 9 (47.8 Mb), 17 (45.1 Mb) and 28 (6.7 Mb) were identified, harboring candidate genes involved in morphogenesis and reproductive traits such as EMP2, MDN1, PCDH10 and GHITM. This study identified novel candidate genes alongside previously reported ones in other goat breeds, suggesting their potential as candidate genes for the studied traits in Egyptian goats.","PeriodicalId":9512,"journal":{"name":"Canadian Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141680238","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}
Pascal Drouin, Érica Benjamim da Silva, Richard Anthony Scuderi, Julien Tremblay, Mathieu Castex, E. Apper
Whole-plant corn untreated (Control) or treated with an inoculant (Lentilactobacillus buchneri, Lentilactobacillus hilgardii, and Pediococcus pentosaceus, INO) was ensiled for 210 d in mini-silos at constant (MS-C) or variable temperature (MS-V) or for 220 d in bunkers. Bunker samples were collected at 50 (D50) and 150 (D150) cm below silo surface. Samples from MS-V and MS-C had similar pH and concentrations of lactic acid, propionic acid, 1,2-propanediol, and ethanol, but different acetic acid content (P = 0.009). Additionally, MS-V exhibited greater bacterial (P = 0.002) and fungal (P = 0.011) richness than MS-C. Inoculation decreased (P < 0.001) lactic acid levels while increasing (P < 0.05) acetic acid, 1,2-propanediol, and fungal richness in both mini-silos and bunker. In bunkers, samples collected from D50 had a lower aerobic stability (P < 0.05) than D150, but inoculation increased (P < 0.05) aerobic stability compared to Control, regardless of sampling depth. The storage temperature of mini-silos did not markedly impact the fermentation profile or fungal community. Overall, inoculation increased acetic acid production and fungal diversity in mini-silos, regardless of the storage temperature, and in bunkers, irrespective of sampling the depth, improving the aerobic stability of D50 and D150 bunker silages after long-term ensiling.
{"title":"Effects of an inoculant containing Lentilactobacillus hilgardii (CNCM-I-4785) on the microbiome, fermentation, and aerobic stability of corn silage stored for long-term at different incubation temperatures","authors":"Pascal Drouin, Érica Benjamim da Silva, Richard Anthony Scuderi, Julien Tremblay, Mathieu Castex, E. Apper","doi":"10.1139/cjas-2023-0117","DOIUrl":"https://doi.org/10.1139/cjas-2023-0117","url":null,"abstract":"Whole-plant corn untreated (Control) or treated with an inoculant (Lentilactobacillus buchneri, Lentilactobacillus hilgardii, and Pediococcus pentosaceus, INO) was ensiled for 210 d in mini-silos at constant (MS-C) or variable temperature (MS-V) or for 220 d in bunkers. Bunker samples were collected at 50 (D50) and 150 (D150) cm below silo surface. Samples from MS-V and MS-C had similar pH and concentrations of lactic acid, propionic acid, 1,2-propanediol, and ethanol, but different acetic acid content (P = 0.009). Additionally, MS-V exhibited greater bacterial (P = 0.002) and fungal (P = 0.011) richness than MS-C. Inoculation decreased (P < 0.001) lactic acid levels while increasing (P < 0.05) acetic acid, 1,2-propanediol, and fungal richness in both mini-silos and bunker. In bunkers, samples collected from D50 had a lower aerobic stability (P < 0.05) than D150, but inoculation increased (P < 0.05) aerobic stability compared to Control, regardless of sampling depth. The storage temperature of mini-silos did not markedly impact the fermentation profile or fungal community. Overall, inoculation increased acetic acid production and fungal diversity in mini-silos, regardless of the storage temperature, and in bunkers, irrespective of sampling the depth, improving the aerobic stability of D50 and D150 bunker silages after long-term ensiling.","PeriodicalId":9512,"journal":{"name":"Canadian Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141346452","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}
Madelena M. Lazurko, Nathan E. Erickson, John Campbell, Kathy A Larson, Cheryl Waldner
Canadian cow-calf producers are facing pressure to adopt management practices and technologies that help increase the economic and environmental sustainability, and public perception of beef production. Our aim was to describe technology adoption, management and record keeping practices in Canadian cow-calf herds, assess associations between herd attributes, productivity outcomes and adoption; and identify opportunities for improvement. Surveys from 131 Canadian cow-calf producers recruited through a national surveillance program were analyzed. Individual female records (80%) and feed testing (84%) were commonly reported as currently or occasionally used, followed by on-farm weigh scales (66%). Western herds were likely to utilize feed testing and nutritionists, ionophores and growth promoting implants, while eastern herds commonly used reproductive technologies. Large herds (>300 cows) were more likely to adopt technologies that aid in data capture (i.e., weigh scales) and follow recommended practices (i.e., feed testing). Paper was the main record keeping format. Production records were commonly utilized for culling and replacement heifer selection. Technology use has increased across the country compared to previous surveys and producers are implementing practices to help increase production efficiency. However, there is an opportunity to increase use of technologies that support individual animal and herd data to help inform ranch decisions.
{"title":"Technology adoption and management practices used in Canadian cow-calf herds","authors":"Madelena M. Lazurko, Nathan E. Erickson, John Campbell, Kathy A Larson, Cheryl Waldner","doi":"10.1139/cjas-2023-0080","DOIUrl":"https://doi.org/10.1139/cjas-2023-0080","url":null,"abstract":"Canadian cow-calf producers are facing pressure to adopt management practices and technologies that help increase the economic and environmental sustainability, and public perception of beef production. Our aim was to describe technology adoption, management and record keeping practices in Canadian cow-calf herds, assess associations between herd attributes, productivity outcomes and adoption; and identify opportunities for improvement. Surveys from 131 Canadian cow-calf producers recruited through a national surveillance program were analyzed. Individual female records (80%) and feed testing (84%) were commonly reported as currently or occasionally used, followed by on-farm weigh scales (66%). Western herds were likely to utilize feed testing and nutritionists, ionophores and growth promoting implants, while eastern herds commonly used reproductive technologies. Large herds (>300 cows) were more likely to adopt technologies that aid in data capture (i.e., weigh scales) and follow recommended practices (i.e., feed testing). Paper was the main record keeping format. Production records were commonly utilized for culling and replacement heifer selection. Technology use has increased across the country compared to previous surveys and producers are implementing practices to help increase production efficiency. However, there is an opportunity to increase use of technologies that support individual animal and herd data to help inform ranch decisions.","PeriodicalId":9512,"journal":{"name":"Canadian Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141369509","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}
288 one-day-old Ross 308 broiler chicks were randomly allotted into 4 dietary treatments; 1)Control (CON; corn-wheat-soybean based diet), 2)CON + 0.05% bacitracin methylene disalicylate (BMD), 3)CON + 0.3% ROD, and 4)CON + 2.5% GP and raised for 28 d. On d 21-27, birds were exposed to either a thermoneutral (TN; 24°C±1) or heat stress (HS; 32-34°C for 8 hr/day). On d 28, twelve male birds per treatment/temperature group were euthanized for measuring blood and intestinal health parameters. 0.05% BMD and 0.3% ROD inclusion improved (P ≤ 0.05) the ABWG and FCR, compared to CON. HS reduced (P ≤ 0.05) AFI, bursa and spleen weights, plasma ALT, lipase, and CK but increased (P ≤ 0.05) ALP, serum immunoglobulins compared to TN birds. HS further reduced (P ≤ 0.05) duodenal VH:CD, jejunal VH and VH:CD but this was reversed by ROD and GP. 0.05% BMD and 2.5% GP increased (P < 0.001) the relative abundance of Blautia and Sellimonas compared to the CON diet. ROD increased (P = 0.010) the relative abundance of Faecalibacterium compared to the BMD diet. The results suggest that 0.3% ROD extract may function as an alternative to antibiotics in improving broiler growth performance and intestinal health.
{"title":"Evaluating the effects of red osier dogwood extract and grape pomace on growth performance, plasma biochemistry, intestinal morphology and microbiota, and immune and antioxidant status of broiler chickens challenged with heat stress","authors":"Fisayo Oretomiloye, D. Adewole","doi":"10.1139/cjas-2023-0125","DOIUrl":"https://doi.org/10.1139/cjas-2023-0125","url":null,"abstract":"288 one-day-old Ross 308 broiler chicks were randomly allotted into 4 dietary treatments; 1)Control (CON; corn-wheat-soybean based diet), 2)CON + 0.05% bacitracin methylene disalicylate (BMD), 3)CON + 0.3% ROD, and 4)CON + 2.5% GP and raised for 28 d. On d 21-27, birds were exposed to either a thermoneutral (TN; 24°C±1) or heat stress (HS; 32-34°C for 8 hr/day). On d 28, twelve male birds per treatment/temperature group were euthanized for measuring blood and intestinal health parameters. 0.05% BMD and 0.3% ROD inclusion improved (P ≤ 0.05) the ABWG and FCR, compared to CON. HS reduced (P ≤ 0.05) AFI, bursa and spleen weights, plasma ALT, lipase, and CK but increased (P ≤ 0.05) ALP, serum immunoglobulins compared to TN birds. HS further reduced (P ≤ 0.05) duodenal VH:CD, jejunal VH and VH:CD but this was reversed by ROD and GP. 0.05% BMD and 2.5% GP increased (P < 0.001) the relative abundance of Blautia and Sellimonas compared to the CON diet. ROD increased (P = 0.010) the relative abundance of Faecalibacterium compared to the BMD diet. The results suggest that 0.3% ROD extract may function as an alternative to antibiotics in improving broiler growth performance and intestinal health.","PeriodicalId":9512,"journal":{"name":"Canadian Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141110128","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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