EurekaMag.com logo
+ Site Statistics
References:
53,517,315
Abstracts:
29,339,501
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Summer food limitation reduces brook and rainbow trout biomass in a southern Appalachian stream



Summer food limitation reduces brook and rainbow trout biomass in a southern Appalachian stream



Transactions of the American Fisheries Society 119.5: 894-901



Salmonid production in summer is assessed in a second- and third-order montane stream in eastern Tennessee in 1987. We sampled three stream sections, one containing exclusively brook trout Salvelinus fontinalis , one containing exclusively rainbow trout Oncorhynchus mykiss , and a third with a mixture of both species. Population estimates for July and Oct 1987 revealed reductions in biomass over the 4-month period that ranged from 31 to 49%, whereas population densities declined by 32-46% during the same period. Total net production during the 4-month period was low and ranged from 0.38 to 0.45 g/m super(2). From Jun-Sep, the mean number of prey items per stomach ranged from 4.2 to 29.9, whereas the mean relative weight of stomach contents ranged from 0.12 to 1.34 mg dry weight per gram wet weight of fish flesh. There was a strong positive correlation between the mean relative weight of stomach contents and the mean condition factor for a given date. Calculated energy intake was below the level necessary to provide energy for maintenance metabolism.

(PDF same-day service: $19.90)

Accession: 018137639

Download citation: RISBibTeXText

DOI: 10.1577/1548-8659(1990)119<0894:SFLRBA>2.3.CO;2



Related references

Encroachment of exotic rainbow trout into stream populations of native brook trout in the southern Appalachian Mountains. Transactions of the American Fisheries Society, 1142: 195-203, 1985

Microhabitat selection by brook and rainbow trout in a southern Appalachian stream. Transactions of the American Fisheries Society 121(6): 729-736, 1992

Encroachment of exotic rainbow trout salmo gairdneri into stream populations of native brook trout salvelinus fontinalis in the southern appalachian mountains usa. Transactions of the American Fisheries Society 114(2): 195-203, 1985

Food resource competition in southern Appalachian brook and rainbow trout. Proceedings of the Annual Conference Southeastern Association of Fish and Wildlife Agencies. October 29-November 1; 43: 239-247, 1989

Evidence of food limitation of rainbow and brown trout in southern appalachian usa soft water streams. Transactions of the American Fisheries Society 116(5): 692-702, 1987

Evidence of food limitation of rainbow and brown trout in southern Appalachian soft-water streams. Transactions of the American Fisheries Society 116.5: 692-702, 1987

Growth and production of sympatric brook trout salvelinus fontinalis and rainbow trout salmo gairdneri in an appalachian usa stream. Transactions of the American Fisheries Society 112(4): 469-475, 1983

Growth and production of sympatric brook and rainbow trout in an Appalachian stream. Transactions of the American Fisheries Society, 1124: 469-475, 1983

Movement, growth, and production of brown trout in sympatry with brook trout in a southern Appalachian stream. Proceedings of the Annual Conference Southeastern Association of Fish and Wildlife Agencies, 54: 146-156, 2000

Factors affecting competitive dominance of rainbow trout over brook trout in southern Appalachian streams: Implications of an individual-based model. Transactions of the American Fisheries Society 126(1): 1-20, 1997

Agonistic behavior, social dominance, and food consumption of brook trout and rainbow trout in a laboratory stream. Proceedings of the Annual Conference Southeastern Association of Fish and Wildlife Agencies, 36: 340-350, 1982

Dynamics and regulation of the southern brook trout Salvelinus fontinalis population in an Appalachian stream. Freshwater Biology: 1494-1508, 2010

Sedimentation effects on benthic macroinvertebrates and rainbow trout in a southern Appalachian stream. Canadian Forest Service Northern Forestry Centre Information Report NOR-X: 356: 451-453, 1998

Multiple electrofishing removals for eliminating rainbow trout in a small southern Appalachian stream. North American Journal of Fisheries Management 20(1): 259-266, February, 2000