Gobbling chronology of eastern wild turkeys in South Carolina. Issue 2 (18th December 2018)

• Record Type: Journal Article
• Authors: Wightman, Patrick H.; Kilgo, John C.; Vukovich, Mark; Cantrell, Jay R.; Ruth, Charles R.; Cohen, Bradley S.; Chamberlain, Michael J.; Collier, Bret A.
• Is Part Of: Journal of wildlife management. Volume 83:Issue 2(2019)
• Page Start: 325
• Page End: 333
• Publication Date: 2018-12-18
• Subjects: gobbling chronology -- hunting -- hunting regulations -- Meleagris gallopavo -- season timing -- wild turkey; Wildlife management -- Periodicals; Zoology -- Periodicals; 333.954
• DOI: 10.1002/jwmg.21600
• Languages: English
• ISSNs: 0022-541X

Abstract

ABSTRACT: Eastern wild turkeys ( Meleagris gallopavo silvestris ) use a polygynous‐promiscuous mating system, wherein males compete for mating opportunities and communicate with females via courtship behaviors. One courtship behavior is vocalization (gobbling), which attracts females and signals dominance to other males. However, temporal variation in gobbling activity may be influenced by external stimuli, environmental variation, and hunter activity. Gobbling activity is a key determinant of hunter satisfaction, and gobbling chronology is often used by state agencies to inform regulatory processes. To identify factors influencing gobbling activity, we evaluated daily gobbling chronology on 3 sites in South Carolina, USA (Webb Wildlife Management Area [WMA] Complex, Savannah River Site, Crackerneck WMA) with different levels of hunter activity. We used autonomous recording units (ARUs; n = 45) across 8, 280 days to collect 53, 937 hours of ambient sound recordings and identified 68, 426 gobbles. Gobbling activity varied daily and site interacting with minutes since sunrise best predicted daily gobbling activity. We noted distinct differences in predicted numbers of gobbles between hunted sites and an unhunted site, suggesting that hunting may be an important determinant of gobbling activity. Across our study sites, we observed that ≥72% of gobbling activity occurred between 30 minutes before and 60 minutes after sunrise. We found no clear evidence of well‐defined unimodal or bimodal peaks in daily or weekly gobbling activity. Across sites, <44% of gobbling activity occurred during legal hunting seasons in South Carolina, with between 30% and 48% of gobbling activity occurring after legal hunting seasons. Because hunter satisfaction is primarily influenced by gobbling activity, wildlife managers in South Carolina may consider adjusting dates of turkey hunting seasons to correspond hunting with periods when most gobbling occurs. © 2018 The Wildlife Society. Abstract : Our results indicated that eastern wild turkey gobbling activity was best predicted by time since sunrise while varying according to hunting regimes. Additionally, most gobbling occurred outside of the current public land hunting season framework in South Carolina. We suggest that accurate assessments of gobbling chronology, combined with reproductive phenology, harvest rates of males, and measurements of hunter satisfaction be considered by agencies when establishing season frameworks and bag limits.