Relationship of Young-of-the-Year Trout to Mature Trout and Groundwater
- 1 January 1965
- journal article
- research article
- Published by Oxford University Press (OUP) in Transactions of the American Fisheries Society
- Vol. 94 (1) , 32-39
- https://doi.org/10.1577/1548-8659(1965)94[32:royttm]2.0.co;2
Abstract
Estimates of the numbers of young-of-the-year and mature brook (Salvelinus fontinalis) and brown (Salmo trutta) trout present in 3.5 miles of the Pigeon River were made each Sept. 1949-60. Correlation coefficients (r) were calculated for the numbers of young-of-the-year trout and groundwater levels in Oct. as measured at an observation well within the Pigeon River drainage. For the 9 years of available data, 1949-57, there was a highly significant linear correlation between numbers of young-of-the-year brook trout and ground-water levels; for the brown trout no correlation was evident. During years of high groundwater level, large numbers of young-of-the-year brook trout were present. Correlation coefficients calculated for the number of mature trout estimated to be present each Sept. and the number of young-of-the-year trout present the following Sept., for 11 years of data, 1949-60, were nonsignificant for both brook trout and brown trout. Analyses of variance of regressions of young-of-the-year trout on groundwater levels and mature trout for the years 1949-57 agreed essentially with the correlation coefficients.Keywords
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