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Welcome to the technical sessions schedule for the 2015 SEAFWA Annual Meeting.

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Wednesday, November 4 • 9:20am - 9:40am
The Effects of Tillage on Shot Concentrations in Dove Fields

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Kelly E. Douglass, David T. Cobb -North Carolina Wildlife Resources Commission; Phillip D. Doerr, North Carolina State University

Despite the research on lead (Pb) shot deposition and ingestion by mourning doves (Zenaida macroura), there has been no research to determine how management practices may be used to effectively reduce Pb shot concentrations in fields managed for dove hunting. We measured shot concentrations in 5 publicly managed mourning dove fields in North Carolina to determine if concentration levels were significantly affected by tillage. We used a complete block design with 12 plots, each of which received a combination of the following planting and management treatments: 3 crops (sunflower (Helianthus annuus), millet (Setaria italica or Brachiaria ramosa), or corn (Zea mays)) and 2 treatments (till or no-till). Soil samples (N = 4,204) were collected before, during, and after dove hunting seasons for 2 years from August 2007 to August 2009. Data were analyzed using a generalized linear mixed model, with a negative binomial distribution, to evaluate differences in shot concentrations among crops and seasons, and between treatments and areas of high and low hunter effort. Shot concentrations differed among seasons and crops and between areas of high and low hunter effort, including a significant interaction between crop and effort. We could not detect any significant effect of treatment, indicating that tillage does not reduce shot concentrations in dove fields. Managers could effectively reduce shot concentrations in dove fields and, therefore, reduce Pb exposure to doves, by limiting hunter access and/or effort or requiring nontoxic shot on managed dove fields.

Wednesday November 4, 2015 9:20am - 9:40am EST
Ballroom Salon A

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