Table 1 The proportion of female Richardson’s ground squirrels (Urocitellus richardsonii) that successfully weaned litters (the number of females that successfully weaned litters divided by the number of females that mated), the number of male and female juveniles emerged at the Assiniboine Park Zoo in Winnipeg, the dates of juvenile emergence, and the number of female yearlings recruited into the population, Canada between 2007 and 2014.

From: Extreme climate event promotes phenological mismatch between sexes in hibernating ground squirrels

Year

Proportion that successfully weaned

Juvenile emergence dates

Juveniles emerged

Yearlings recruited

2007

16 May–5 June

114

34

2008

0.87

21 May–10 June

347

36

2009

0.79

5 June–16 June

153

19

2010

22

2011

0.60

1 June–21 June

170

29*

2012

0.82

16 May–4 June

238

12

2013

0.79

1 June–21 June

289

34

2014

0.81

1 June–16 June

375

53

  1. *Number of yearling females inferred based on body weight at first capture since juveniles were not marked in the previous year.