Table 2. Key biological attributes and references for the six species examined in the standardized PVA comparisons. The species “code” is used in all other tables and figures. N (Ext) is the initial population size when extinctions are measured (all projected for 50 years). N/T (No Ext) is the initial size and simulation duration for those simulations set up to show no extinctions.









Survival


Scientific name
Common name
Code
Taxon
r
Age 1st breeding
Fecundity
(CV)
Juvenile
(CV)
Adult
(CV)
No.
stages
N
(Ext)
N/T
(No Ext)
Canis lupus 1
Isle Royale wolf
WO
mammal
0.013
3 yr
0.56 (0.71)
0.53 (0.18)
0.90 (0.18)
10
20
200/20 yr
Cervas elaphus 2
Rhum deer
RD
mammal
-0.062
3 yr
0.30 (0.14)
0.81 (0.13)
0.71 (0.14)
14
220
220/20 yr
Grus
americana 3
Whooping Crane
WC
bird
0.044
4 yr
0.23 (0.29)
0.91 (0.08)
0.91 (0.08)
20
12
100/50 yr
Sceloporus graciosus 4
sage-brush lizard
LZ
reptile
0.0167
2 yr
0.89 (0.51)
0.55 (0.31)
0.59 (0.33)
5
30
200/10 yr
Tricholimnas sylvestris 5
Lord Howe Island Woodhen
WH
bird
-0.004
1 yr
0.55 (0.15)
0.35 (0.17)
0.75 (0.15)
7
50
100/10 yr
N/A 6
hypothetical
HP
bird or mammal
0.015
3 yr
0.58 (0.10)
0.67 (0.10)
0.77 (0.10)
10
30
100/25 yr

1 Vucetich et al. (1997), Peterson et al. (1998). An isolated population restricted to Isle Royale, and island in Lake Superior.
2 Lowe (1969), Clutton-Brock et al. (1982). An island population (west Scotland) declining due to culling pressure.
3 Mirande et al. (1997). A long-lived, migratory, endangered North American crane.
4 Tinkle et al. (1993). A small lizard inhabiting semiarid grasslands of western United States.
5 Brook et al. (1997) b. L.H.I. = Lord Howe Island. A small, ground-dwelling, flightless rail endemic to the island, east of Australia.
6 Hypothetical generalized bird or mammal-like life history.