Parentage of 920 gray-sided voles (Myodes rufocanus) born in a 3-ha outdoor enclosure between September 1992 and May 1994

This dataset provides the estimated birth location, sex, assigned parents, and estimated birth and death dates of 920 gray-sided voles (Myodes rufocanus) born in a 3-ha outdoor enclosure in Sapporo, Japan between September 1992 and May 1994, as well as capture–recapture data for 30 trapping sessions. We introduced 22 males and 25 females from several natural populations into the enclosure in late September 1992. Individuals in the enclosure were captured using live traps every two weeks until late April 1994, except for periods with deep snow cover. The location, body weight, and reproductive status of each vole were monitored throughout the study period. Complementary trapping was performed within the home ranges of breeding females to mark juveniles as early as possible. Upon first capture, each individual was marked by toe clipping for subsequent identification, and the cut toes were used as DNA samples. For each individual, candidate parents were selected based on female reproductio..., On 29 September 1992, 47 individuals (22 males and 25 females) from seven natural gray-sided vole populations were introduced into a 3-ha (200 m × 150 m) outdoor enclosure established in a secondary forest in Sapporo, Japan (42°59’03”N 141°23’14”E; Figure 1). These founders were chosen to maximize heterozygosity at three microsatellite loci. Until 27 April 1994, we conducted 3-day capture–mark–recapture surveys every two weeks using live traps set at 300 trap stations in a 20 × 15-grid pattern with 10-m spacing, except during periods of deep snow cover. Traps were set at 0900 h and checked at 1400 h and 2000 h every day; all traps were closed after the check at 2000 h. Through these surveys, we continuously monitored the location, weight, and reproductive status of each individual in the enclosure. Complementary trapping was also performed within the home ranges of breeding females to mark juveniles as early as possible (~20 days after birth). On first capture, each individual was marke..., , # Parentage of 920 gray-sided voles (*Myodes rufocanus*) born in a 3-ha outdoor enclosure between September 1992 and May 1994

This dataset was compiled as the result of an investigation of the mating system of gray-sided voles (*Myodes rufocanus*) within a 3-ha outdoor enclosure from September 1992 to May 1994. The data (vole_data.csv) included information on estimated birth locations, assigned parents, and estimated birth and death dates for 920 individuals born within the enclosure. They were derived from 215 litters, among which 51 litters had multiple paternity.

It was also accompanied with capture and recapture data of all individuals for 30 trapping sessions (capture_data.csv), which were conducted for 3 days every 2 weeks, except for periods with deep snow cover, using live traps set at 300 trap stations in a 20 × 15-grid pattern with 10-m spacing (Figure_1.png). Traps were set at 0900 h and checked at 1400 h and 2000 h every day; all traps were closed after the check at 2000 h...