R/P-29

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Effects of low dissolved oxygen in the Chesapeake Bay. II. Trophic interactions in a zooplankton-fish larvae-nekton assemblage (Original title: Effects of low dissolved oxygen levels in the Chesapeake Bay on behavior, growth and survival of fish larvae)

Principal Investigator:

Edward D. Houde

Start/End Year:

1990 - 1994

Institution:

Chesapeake Biological Laboratory, University of Maryland Center for Environmental Science

Co-Principal Investigator:

Denise L. Breitberg, Academy of Natural Sciences Estuarine Research Center

Topic(s):

Description:

The proposed research will provide data on behavior, growth and survival needed to assess the impact of anoxic and hypoxic waters in the Chesapeake Bay on mortality of larval fishes. We will determine whether larvae of two important forage species avoid oxygen-poor water in a stratified water column, as well as effects of low DO on growth, survival, swimming behavior and susceptibility to predation -- factors likely to influence larval mortality when hypoxic waters are not avoided. In addition, we will compare results of laboratory experiments with samples collected to examine the relationship between DO and larval distributions in the field.

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