Juvenile salmonid production in a Lake Erie nursery stream

Juvenile salmonid production in a Lake Erie nursery stream Normandale Creek (2531m2) provides spawning and nursery grounds for lake‐run rainbow trout, Salmo gairdneri Richardson, brown trout, Salmo frutta L., and coho salmon, Oncorhynchus kisutch (Walbaum). Upstream movements are significantly correlated with peak stream discharge (P < 0.05). In 1973–1974, 59 adult salmonids constructed 86 nests of which 60% were disturbed by re‐use or sand deposition. From a calculated deposition of 90 400 ova, 483 juveniles, 6 cm in fork length (f.l.), were resident in the stream when estimates by electrofishing first became valid. Estimated within‐stream (i.e. all sections combined) monthly densities of wild juveniles >6 cm f.l. ranged from six to 22 fish (100 m2)−1, and biomass from 1.3 to 3.1 gm−2. The highest within‐section biomass was 8.3 gm−2 in November. Additions of hatchery‐reared rainbow trout temporarily increased monthly within‐stream juvenile density up to 23 fish (100 m2)−1, and biomass to 8.2 g m−2. Density and biomass were positively correlated (P < 0.05) with both instream and bank cover, and biomass negatively correlated (P < 0.05) with gradient. The importance of substratum and flow characteristics on juvenile density and biomass was strongly indicated although not statistically significant. Annual within‐section production of juveniles > 6 cm f.l. ranged from 4.79 to 5.93 g m−2 year−1 in Sections III and IV, respectively. Inclusion of calculated probable numbers of fish < 6 cm f.l. increased within‐section production from 5.93 to 18.65 g m−2 year−l in upstream Section IV. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Fish Biology Wiley

Juvenile salmonid production in a Lake Erie nursery stream

Journal of Fish Biology, Volume 21 (4) – Oct 1, 1982

Loading next page...
 
/lp/wiley/juvenile-salmonid-production-in-a-lake-erie-nursery-stream-0CnvFG5kPG
Publisher
Wiley
Copyright
Copyright © 1982 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0022-1112
eISSN
1095-8649
DOI
10.1111/j.1095-8649.1982.tb02852.x
Publisher site
See Article on Publisher Site

Abstract

Normandale Creek (2531m2) provides spawning and nursery grounds for lake‐run rainbow trout, Salmo gairdneri Richardson, brown trout, Salmo frutta L., and coho salmon, Oncorhynchus kisutch (Walbaum). Upstream movements are significantly correlated with peak stream discharge (P < 0.05). In 1973–1974, 59 adult salmonids constructed 86 nests of which 60% were disturbed by re‐use or sand deposition. From a calculated deposition of 90 400 ova, 483 juveniles, 6 cm in fork length (f.l.), were resident in the stream when estimates by electrofishing first became valid. Estimated within‐stream (i.e. all sections combined) monthly densities of wild juveniles >6 cm f.l. ranged from six to 22 fish (100 m2)−1, and biomass from 1.3 to 3.1 gm−2. The highest within‐section biomass was 8.3 gm−2 in November. Additions of hatchery‐reared rainbow trout temporarily increased monthly within‐stream juvenile density up to 23 fish (100 m2)−1, and biomass to 8.2 g m−2. Density and biomass were positively correlated (P < 0.05) with both instream and bank cover, and biomass negatively correlated (P < 0.05) with gradient. The importance of substratum and flow characteristics on juvenile density and biomass was strongly indicated although not statistically significant. Annual within‐section production of juveniles > 6 cm f.l. ranged from 4.79 to 5.93 g m−2 year−1 in Sections III and IV, respectively. Inclusion of calculated probable numbers of fish < 6 cm f.l. increased within‐section production from 5.93 to 18.65 g m−2 year−l in upstream Section IV.

Journal

Journal of Fish BiologyWiley

Published: Oct 1, 1982

References

  • Production of salmon and trout in a stream in Scotland
    Egglishaw, Egglishaw
  • Evaluation of the contributions of supplemental plantings of brown trout Salmo trutta (L) to a self‐sustaining fishery in the Sydenham River, Ontario, Canada
    Millard, Millard; MacCrimmon, MacCrimmon

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create folders to
organize your research

Export folders, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off