Species Profile

Banff Longnose Dace

Scientific Name: Rhinichthys cataractae smithi
Taxonomy Group: Fishes
Range: Alberta
Last COSEWIC Assessment: May 2000
Last COSEWIC Designation: Extinct
SARA Status: No Schedule, No Status

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Quick Links: | Photo | Description | Habitat | Biology | Reasons for extinction | Documents

Image of Banff Longnose Dace

Banff Longnose Dace Photo 1
Banff Longnose Dace Photo 2



The back of the Banff Longnose Dace was olive black, its sides were lighter and the underparts were white. There was a black stripe from the tip of the snout to the tail in the young of the species; seen from the side, the head was in the shape of a wedge. The maximum length of adults was 54.0 mm.


Distribution and Population

The Banff Longnose Dace was found only in a marsh into which the Cave and Basin Hotsprings drain, in Banff National Park. There is no estimate as to the past size of the population of Banff Longnose Dace. This subspecies is now considered extinct.



The Banff longnose dace existed only in one marsh, where vegetation was present on the muddy bottom, the current slight and the water shallow.



Spawning occurred in May, June or early July. One parent guarded the nest. This species grows very slowly.


Reasons for extinction

There were three main limiting factors for this species: 1) the introduction of tropical fishes into the pool, which created competition and predation on the eggs and young of the Banff Longnose Dace; 2) leakage of chlorine from a swimming pool into the marsh, which has changed the habitat of this species; and 3) construction of a beaver dam at the end of the marsh, which may have obstructed movements of the dace.




PLEASE NOTE: Not all COSEWIC reports are currently available on the SARA Public Registry. Most of the reports not yet available are status reports for species assessed by COSEWIC prior to May 2002. Other COSEWIC reports not yet available may include those species assessed as Extinct, Data Deficient or Not at Risk. In the meantime, they are available on request from the COSEWIC Secretariat.

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