Effects Of Spawning Run Delay On Spawning Migration Of Arctic Grayling. A Thesis For The Degree Of Master Of Science

Fleming, D.F.

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Effects Of Spawning Run Delay On Spawning Migration Of Arctic Grayling. A Thesis For The Degree Of Master Of Science

1989-09-01
By Fleming, D.F.

File Language:

English

Details

Creators:

Fleming, D.F.
Corporate Creators:

Alaska. Dept. of Transportation and Public Facilities
Corporate Contributors:

United States. Federal Highway Administration
Subject/TRT Terms:
Publication/ Report Number:

AK-RD-90-03
Resource Type:

Research Paper
Geographical Coverage:

Alaska ; United States
TRIS Online Accession Number:

00490593
Corporate Publisher:

Alaska. Dept. of Transportation and Public Facilities
NTL Classification:

AGR-IMPACTS-Environment
Abstract:

The effects of delays on the spawning run of Arctic grayling in Fish Creek, a tributary of the Jack River, near Cantwell, Alaska, were examined. Tagged grayling were delayed for 3, 6, or 12 days, and then released; control fish were released within 12 hours of capture. During the delays, a high proportion of females became ripe; most males were ripe before the delays and remained ripe over a longer period than females. Delayed and control fish were monitored by the recapture of tagged fish in upstream traps. Females released in a "running-ripe" condition migrated at higher rates, but failed to reach upstream areas in similar proportions as those of "less ripe" females. Reduction in distances traveled by grayling as a result of longer delays may lead to the use of non-preferred spawning habitats, underuse of spawning areas upstream, and decreases in recruitment. It is recommended that spawning delays for Arctic grayling not exceed 3 days.
Format:

PDF
Download URL:

https://rosap.ntl.bts.gov/view/dot/40637/dot_40637_DS1.pdf
File Type:

[PDF - 3.62 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha256:38d934f0efd3593b443d30bf263892065b4558a65519252ce566dad58765d8d4

File Language:

English

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