Table 1 Average litter size, life span and lifetime reproductive success (LRS) in different ancestry classes of a Swedish arctic fox population, as well as their respective sample sizes

From: Strongly deleterious mutations influence reproductive output and longevity in an endangered population

Ancestry

Fitness traits

 

Sample size

pair combination

litter size (n. cubs)

n. litters

native x native

6.30

37

native x immigrant

11.17

6

immigrant x immigrant F1-F4

5.14

59

immigrant F1-F4 x immigrant F1-F4

6.05

19

individual ancestry

life span (yrs)

LRS (n. cubs)

n. individuals

native

3.8

7.60

30

immigrant F1

4.8

12.19

21

immigrant F2 + F3

3.2

6.94

34

  1. Litters were divided into different pair combinations of native and immigrant descendants. Average life span and lifetime reproductive success were assessed for individual foxes of different ancestry that survived their first year of life.
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