Assessment of Potential Indicator Species for Monitoring ...

2c. Breeding biology is well understood?
Nest in cavities where they are protected from desiccation. Eggs are attended by at
least one parent until they hatch. Juveniles emerge as fully formed adults. Breeding
occurs in March until May and juveniles hatch out in September (Orchard 1984).
2d. Migration behaviour is well documented?
Non-migratory.
2e. Information on historic abundance?
No.
3a. Can nests or animal be easily located?
Locating nest cavities could be difficult and highly disruptive.
3b. Can samples be easily collected?
It would not be easy to sample eggs and juveniles because of the difficulty in
finding them. It might be possible, however, to locate adults by pitfall trapping.
4a. Captive rearing possible and well understood?
Insufficient information.
4b. Captive breeding possible and well understood?
Insufficient information.
5a. Is there historic information on contaminant burdens in the Fraser Basin?
No.
5b. Has this species been used in contaminant studies in other regions?
No.
5c. Have biological effects for this species been studied?
No.
TAILED FROG Ascaphus truei
1a. Present in the Fraser Basin year-round?
Yes.
1b. Broad distribution?
Limited to the coastal and central regions of the Fraser Basin. With the exception
of one location in the interior, Tailed Frogs occur along the Fraser River only as far
up as the junction of the Thompson and Fraser Rivers (Orchard 1984; Green and
Campbell 1984).
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