Assessing the reproductive contributions of sympatric anadromous and freshwater‐resident brook trout
- 15 March 2005
- journal article
- Published by Wiley in Journal of Fish Biology
- Vol. 66 (3) , 741-757
- https://doi.org/10.1111/j.0022-1112.2005.00636.x
Abstract
The δ13C, δ15N and δ34S isotope values of newly emerged, brook trout Salvelinus fontinalis alevins (free‐swimming individuals beginning exogenous feeding) were examined to determine if progeny of anadromous female spawners could be detected and their contributions to reproduction assessed in river systems with mixed migration strategies. Separation of anadromous and freshwater resident and immigrant sources of progeny could be detected primarily using δ13C values before alevins reached a size of 28 mm fork length and c. 20 days after exogenous feeding began. Among 10 populations, the contributions of anadromous females ranged from 0 to 42% of newly emerged alevins. Correlations between anadromous contributions and estimates of total brook trout density and alevin production were unexpectedly negative.Keywords
This publication has 58 references indexed in Scilit:
- Genetic Population Structure of Brook Trout Inhabiting a Large River WatershedTransactions of the American Fisheries Society, 2004
- Spatial and Temporal Movements of a Riverine Brook Trout PopulationTransactions of the American Fisheries Society, 2002
- Egg Survival in a Fluvial Population of Masu Salmon in Relation to Intragravel Conditions in Spawning ReddsTransactions of the American Fisheries Society, 2001
- Identification of Anadromous and Nonanadromous Adult Brook Trout and Their Progeny in the Tabusintac River, New Brunswick, by Means of Multiple-Stable-Isotope AnalysisTransactions of the American Fisheries Society, 1999
- Application of Stable Isotope Techniques to Trophic Studies of Age-0 Smallmouth BassTransactions of the American Fisheries Society, 1998
- Genetic assessment of the reproductive success of Atlantic salmon precocious parr by means of VNTR lociHeredity, 1996
- Incorporation of nitrogen and carbon from spawning coho salmon into the trophic system of small streams: evidence from stable isotopesCanadian Journal of Fisheries and Aquatic Sciences, 1996
- Coastal Cutthroat Trout: A Life History CompendiumTransactions of the American Fisheries Society, 1989
- Diadromous and Resident Trout Salmo Trutta: Is Their Difference Due to Genetics?Oikos, 1982
- A Comparative Study of Anadromous and Freshwater Populations of Brook Trout (Salvelinus fontinalis (Mitchill))Journal of the Fisheries Research Board of Canada, 1952