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 |