Effects of Hen Wild Turkey (Meleagris gallopavo) Incubation Recess Behavior on Survival and Nest Survival in Florida

Abstract

For bird species that exhibit comprehensive parental care (e.g., incubation, brooding, and extended parental care post-fledging), protection of self, as well as juvenile offspring, requires parent birds to have separate but overlapping anti-predator strategies during reproductive phases of the annual cycle. Behavior of nesting hen Meleagris gallopavo (Wild Turkey) may vary due to landscape features (e.g., roads, water source, or pastureland), potentially influencing predator encounter rates at the nest and consequently affecting nest survival. We assessed factors affecting nest survival and hen survival during incubation, including temporal patterns of M. g. osceola (Osceola Wild Turkey) and M.g. silvestris (Eastern Wild Turkey) recess behaviors. We used data on recess bouts from 37 hens fitted with global positioning system (GPS) transmitters and 54 confirmed nest attempts in north and north-central Florida to determine the effect of nest attendance on nest survival. On average, hens took 0.89 incubation recess bouts between 0800 and 1800, usually in the afternoon. Hen survival increased with an increase in daily recess bouts, longer daily recess bouts, and later nest incubation-initiation dates, and the probability of nest survival increased when hens took longer afternoon recess bouts. Nest survival was greater in the north-central region. These results indicate increases in recess duration contribute to greater hen and nest survival, which may be due to reduced nest-predator activity in the afternoon at the study sites. We recommend additional research into the relationship between predator activity and nesting Wild Turkeys on managed lands similar to those in our study.