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Articles by B.A. McCrea
Total Records ( 3 ) for B.A. McCrea
  B.A. McCrea , M.A. Leslie , L.M. Stevenson , K.S. Macklin , L.J. Bauermeister and J.B. Hess
  A study was performed to compare the performance of heritage (Bourbon Red) and conventional (Broad Breasted White) turkey varieties in an outdoor range management system in the Southeastern United States. Turkeys were brooded indoors to 4 weeks of age and then moved to outdoor pens until processed at 17 weeks of age. Period and cumulative BW gain, feed intake and feed conversion were compared at 7, 10, 13 and 17 weeks of age. The final live weight, carcass weight and carcass yield were compared for both varieties and sexes of turkeys. Foot pad lesions were scored at 4, 7, 10, 13 and 17 weeks of age. The presence of Salmonella, Campylobacter, Clostridium perfringens, total aerobes and total enteric counts were determined via cloacal swabs or carcass rinsate. Significant differences between varieties with regard to live performance and carcass data were noted. The BBW turkeys had a higher feed intake, weight gain, live weights, carcass weights and carcass yields than the BR turkeys. Significant differences between the sexes for live weight and carcass weight but not carcass yield were also noted. Foot pad lesions were often identified in the BBW strain, with the majority of the BBW turkeys (75.2%) having detectable lesions by week 17. In comparison, the BR turkey had no lesions at week 17. The pathogen load of the two varieties was not different with the exception of Clostridium perfringens and total anaerobic counts, both of which were higher in BBW. The data collected in this study will aid small producers with alternative production of heritage turkey varieties.
  B.A. McCrea , J.R. Moyle , J. Flores , J. Timmons and N. Zimmermann
  The Delmarva Chicken Festival has had an educational exhibit organized by extension poultry specialists/veterinarians for 25 years. A three question survey of the general public was performed at the 64th and 65th Annual Festivals to determine how much of the educational material has reached the general public. The results indicate that extension outreach needs to continue on educating the public that hormones are not used in chicken feed; that there is not nutritional difference between brown-shelled eggs and white-shelled eggs; and that commercial poultry farmers are stewards of the environment that we all share.
  J.R. Moyle , L.A. Brooks and B.A. McCrea

Background and Objective: A major component of biosecurity on commercial broiler farms is limiting movement of individuals, animals, or other fomites between farms. Scavengers, particularly vultures and other animals, can travel back and forth between farms, carrying diseases and parasites with them as they search for food such as poultry mortalities. Of particular concern are the avian scavengers, Turkey Vultures (Cathartes aura) and Black Vultures (Coragyps atratus), because of their ability to travel long distances and visit multiple farms in a single day. As a result of farmer concern regarding increases in avian scavengers, this study was conducted to assess activity at commercial poultry operations. Materials and Methods: This was an observational study based on 318 days of viewing on four farms. Game cameras were placed on four commercial broiler farms pointed at the composters and farmer surveys were filled out on several other farms. Results: Based on 318 days’ worth of data, Turkey Vultures were seen on 59% (n = 187) of the days and Black Vultures were seen on 14% (n = 44) of the days. On 28% (n = 89) of the camera days, the species of vulture could not be distinguished and for 21% (n = 66) of the days, no vultures were present at the broiler farm composter. The largest groups of vultures were seen in the morning and then again, less frequently, in the afternoon hours. Conclusion: Based on the farmer scouting results, the majority of the time (27.7% of instances), vultures were seen on the manure structure, which was often located near the composter. Other animals seen while using the game cameras included cats, eagles, hawks, dogs, raccoons and foxes.

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