An Analysis of 1974 Striped Bass spawning success in the Potomac Estuary.

Polgar, T. T. and Mihursky, J. A. and Ulanowicz, Robert E. and Wilson, J. S. (1976) An Analysis of 1974 Striped Bass spawning success in the Potomac Estuary. In: Wiley, Martin (ed.) Estuarine Processes: Volume 1. Uses, Stresses, and Adaptation to the Estuary. New York, Academic Press, pp. 151-165.

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Abstract

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.

Item Type: Book Section
Title: An Analysis of 1974 Striped Bass spawning success in the Potomac Estuary.
Personal Creator/Author:
CreatorsEmail
Polgar, T. T.
Mihursky, J. A.
Ulanowicz, Robert E.
Wilson, J. S.
Corporate Creator/Author: University of Maryland. Center for Environmental Science- CBL
Title of Book: Estuarine Processes: Volume 1. Uses, Stresses, and Adaptation to the Estuary
Editors:
EditorsEmail
Wiley, Martin
Refereed: Yes
Page Range: pp. 151-165
Date: 1976
Publisher: Academic Press
Place of Publication: New York
Additional Information: UMCES (University of Maryland Center for Environmental Science); Ref. No. 76-186 UMCES (University of Maryland Center for Environmental Science); Contribution No. 686
Uncontrolled Keywords: Striped Bass; Potomac River; United States
Subjects: Management
Fisheries
Item ID: 1997
Depositing User: Kathleen Heil
Date Deposited: 10 Apr 2009 17:22
Last Modified: 14 Dec 2010 16:47
URI: http://aquaticcommons.org/id/eprint/1997

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