Polgar, T. T. and Mihursky, J. A. and Ulanowicz, Robert E. and Wilson, J. S.
An Analysis of 1974 Striped Bass spawning success in the Potomac Estuary.
Wiley, Martin (ed.)
Estuarine Processes: Volume 1. Uses, Stresses, and Adaptation to the Estuary.
ABSTRACT: The Potomac River Fisheries Program is concerned with the longterm effects of power plant ichthyoplankton entrainment on striped bass(hforone smatilis) recruitment. Since striped bass population fluctuations are determined strongly by environmental conditions during spawning and early development, assessment of power plant-induced ichthyoplankton mortalities must consider the mechanisms controlling spawning success. Ichthyoplankton distributions for 1974, spawning population abundance and fecundity, and environmental conditions were considered for analysis. Loss of the early part of the spawn (including the peak) accounted for the highest mortalities among ichthyoplankton. This was due to the proximity of these distributions to the salt wedge where transport into regions un!ivorable to survival seems to have occurred. The later, successful portion of the spawn occurred further upstream, in fresh tidal portions of the river. The sequence of events Ieading to an assessment of factors affecting ichthyoplankton surnnl are evaluated. Due to high early mortalities in ichthyoplankton, 1974 spawning success was low, and a poor yearclass is projected.
||An Analysis of 1974 Striped Bass spawning success in the Potomac Estuary.
|Polgar, T. T.|
|Mihursky, J. A.|
|Ulanowicz, Robert E.|
|Wilson, J. S.|
||University of Maryland. Center for Environmental Science- CBL
|Title of Book:
||Estuarine Processes: Volume 1. Uses, Stresses, and Adaptation to the Estuary
|Place of Publication:
||UMCES (University of Maryland Center for Environmental Science); Ref. No. 76-186
UMCES (University of Maryland Center for Environmental Science); Contribution No. 686
||Striped Bass; Potomac River; United States
||10 Apr 2009 17:22
||14 Dec 2010 16:47
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