Diel movement patterns of the Hawaiian
implications for ecological interactions between sympatric
D. Cartamil, J. Vaudo, C. Lowe, B. Wetherbee & K. Holland
ecological and commercial importance, there is almost nothing
known about the fine-scale movement patterns of Dasyatid rays.
We used acoustic telemetry to track the movement patterns of seven
Hawaiian Stingrays, Dasyatis lata, in Kaneohe Bay, Oahu,
Hawaii. These rays
were tracked up to 72 hours each and analyzed using GIS methods to
elucidate diel patterns in activity space and rate of movement.
Additionally, we examined our data in light of previously
published data on juvenile scalloped hammerhead shark,
Sphyrna lewini, movement patterns in Kaneohe Bay (Lowe, in
press). Our study
D. lata and S. lewini pups in Kaneohe Bay show overlap in
habitat use and time of activity – we discuss the implications of
these findings for competition between the two species.
Manuscript published in the journal Marine Biology, Vol. 142(5): pp.
This project was funded by the
Pauley Summer Program run through the Hawaii Institute of Marine