Small-Scale Vertical Movements of Summer Flounder Relative to Diurnal, Tidal, and Temperature Changes
Virginia Institute of Marine Science
MARINE AND COASTAL FISHERIES
Observation of animal movements on small spatial scales provides a means to understand how large-scale species distributions are established from individual behavioral decisions. Small-scale vertical movements of 14 Summer Flounder Paralichthys dentatus residing in Chesapeake Bay were observed by using depth data collected with archival tags. A generalized linear mixed model was employed to examine the relationship between these vertical movements and environmental covariates such as tidal state, time of day, lunar phase, and temperature. Vertical movements increased with warming water temperatures, and this pattern was most apparent at night and during rising and falling tides. Fish generally exhibited greater vertical movements at night, but the difference between vertical movements in the day and those at night decreased as fish increased in size. Results from this study fill a void in understanding the small-scale movements of Summer Flounder and could be incorporated into individual-based models to investigate how species distributions develop in response to environmental conditions.
PARALICHTHYS-DENTATUS; ULTRASONIC TELEMETRY; CHESAPEAKE BAY; BLUEFIN TUNA; DYNAMICS; FISH; CONSUMPTION; METABOLISM; SALINITY; BEHAVIOR
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Steve Cadrin (University of Massachusetts Amherst) provided guidance on archival tag specifications and attachment techniques. Captain Chandler Hogg, Captain Craig Paige, and numerous volunteers from the Virginia Institute of Marine Science (VIMS) were instrumental in collecting Summer Flounder for the archival tagging project. We are grateful for comments provided by Rob Latour (VIMS), Tracey Sutton (VIMS), Harry Wang (VIMS), Steve Cadrin, and Susanna Musick (VIMS) on a previous version of this paper. Funding was provided by the National Oceanic and Atmospheric Administration's Sea Grant Population Dynamics Fellowship to M.J.H. and VIMS. This paper is Contribution Number 3349 of the Virginia Institute of Marine Science, College of William and Mary.
Mark J. Henderson & Mary C. Fabrizio (2014) Small-Scale Vertical Movements of Summer Flounder Relative to Diurnal, Tidal, and Temperature Changes, Marine and Coastal Fisheries, 6:1, 108-118, DOI: 10.1080/19425120.2014.893468