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Assessing the Spawning Potential of ...

Embke, Holly Susan.

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Assessing the Spawning Potential of Grass Carp in the Sandusky River Under Varying Conditions.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Assessing the Spawning Potential of Grass Carp in the Sandusky River Under Varying Conditions./
Author:	Embke, Holly Susan.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
Description:	60 p.
Notes:	Source: Masters Abstracts International, Volume: 57-02.
Contained By:	Masters Abstracts International57-02(E).
Subject:	Aquatic sciences. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10702646
ISBN:	9780355442274

Assessing the Spawning Potential of Grass Carp in the Sandusky River Under Varying Conditions.
Embke, Holly Susan.

Assessing the Spawning Potential of Grass Carp in the Sandusky River Under Varying Conditions. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 60 p.

Source: Masters Abstracts International, Volume: 57-02.

Thesis (M.S.)--The University of Toledo, 2017.

Invasive Grass Carp (Ctenopharyngodon idella) have been stocked for decades in the United States for vegetation control. Adults have been found in all of the Great Lakes except Lake Superior, but no self-sustaining populations have yet been identified in Great Lakes tributaries. Previous research suggested natural reproduction has occurred in the Sandusky River; hence I sampled ichthyoplankton using bongo net tows and larval light traps June through August 2015 and 2016 to determine if Grass Carp were spawning. I identified and staged eight eggs that were morphologically consistent with Grass Carp. Five eggs were confirmed as Grass Carp using quantitative PCR and DNA sequencing, while three were retained for future analysis. All eggs were collected during high-flow events, either on the day of or 1-2 days following peak flow, supporting a suggestion that high-flow conditions favor Grass Carp spawning. From my egg collection findings, I used hydraulic modeling to estimate the most probable spawning and hatching locations for these eggs. Preliminary model results suggest eggs were most likely released near the hypothesized spawning site near Fremont, Ohio at river km 21.25. Hatch locations were near the mouth of the Sandusky River at Muddy Creek Bay, with the majority of eggs likely hatching at river km 2.9. These locations will help guide future sampling efforts, inform risk assessments and aid targeted control efforts.

ISBN: 9780355442274Subjects--Topical Terms:

3174300
Aquatic sciences.

Assessing the Spawning Potential of Grass Carp in the Sandusky River Under Varying Conditions.
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