Bibliography and Index of the Sirenia and Desmostylia  

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"Nowacek, Douglas P."

 
 
 Flamm, Richard O.; Owen, Edward C. G.; Owen, C. F. W.; Wells, Randall S.; Nowacek, Douglas P. (detail)
   
2000
Aerial videogrammetry from a tethered airship to assess manatee life-stage structure.
Mar. Mamm. Sci. 16(3): 617-630. 3 tabs. 5 figs.
 
 
 Nowacek, Stephanie M.; Nowacek, Douglas P.; Johnson, M. P.; Shorter, K. A.; Powell, James Arthur, Jr.; Wells, Randall S. (detail)
   
2002
Manatee behavioral responses to vessel approaches: results of digital acoustic logger tagging of manatees in Belize.
Mote Mar. Lab. Tech. Rept. No. 847: 1-61.
 
 
 Nowacek, Douglas P.; Casper, B. M.; Wells, Randall S.; Nowacek, Stephanie M.; Mann, D. A. (detail)
   
2003
Intraspecific and geographic variation of West Indian manatee (Trichechus manatus spp.) vocalizations.
Jour. Acoustical Soc. Amer. 114(1): 66-69.
 
 
 Nowacek, Stephanie M.; Wells, Randall S.; Owen, Edward C. G.; Speakman, Todd R.; Flamm, Richard O.; Nowacek, Douglas P. (detail)
   
2004
Florida manatees, Trichechus manatus latirostris, respond to approaching vessels.
Biol. Conserv. 119: 517-523.
 
 
 Mann, David A.; O'Shea, Thomas J.; Nowacek, Douglas P. (detail)
   
2006
Nonlinear dynamics in manatee vocalizations.
Mar. Mamm. Sci. 22(3): 548-555. 2 tabs. 3 figs. July 2006.
 
 
 Chapla, Marie E.; Nowacek, Douglas P.; Rommel, Sentiel A.; Sadler, Valerie M. (detail)
   
2007
CT scans and 3D reconstructions of Florida manatee (Trichechus manatus latirostris) heads and ear bones.
Hearing Research 228(1-2): 123-135. 6 tabs. 9 figs. + online supplementary material. doi:10.1016/j.heares.2007.01.029
–ABSTRACT: The auditory anatomy of the Florida manatee (Trichechus manatus latirostris) was investigated using computerized tomography (CT),three-dimensional reconstructions, and traditional dissection of heads removed during necropsy. The densities (kg/m3) of the soft tissues of the head were measured directly using the displacement method and those of the soft tissues and bone were calculated from CT measurements (Hounsfield units). The manatee's fatty tissue was significantly less dense than the other soft tissues within the head (p< 0.05). The squamosal bone was significantly less dense than the other bones of the head (p< 0.05). Measurements of the ear bones (tympanic, periotic, malleus, incus, and stapes) collected during dissection revealed that the ossicular chain was overly massive for the mass of the tympanoperiotic complex.
 
 
 Rycyk, Athena M.; Deutsch, Charles J.; Barlas, Margaret E.; Hardy, Stacie K.; Frisch, Katherine; Leone, Erin H.; Nowacek, Douglas P. (detail)
   
2018
Manatee behavioral response to boats.
Mar. Mamm. Sci. 34(4): 924-962. 5 tabs. 15 figs. + suppl. information. doi:10.1111/mms.12491. Feb. 28, 2018.
–ABSTRACT: The long?term viability of the Florida manatee is threatened in part by mortality from boat collisions. This study investigated manatee behavior during boat approaches to better understand factors that lead to manatee–boat collisions. Digital acoustic recording tags (DTAGs) and Argos?linked GPS tags were deployed on 18 manatees in southwest Florida, and boat traffic around them was mapped. Suites of manatee behavioral, environmental, and boat?related factors were recorded during opportunistic boat passes. We built generalized linear mixed models to determine which factors accounted for variation in occurrence, number, and timing of manatee behavioral changes during boat passes. Manatees responded to boats, changing their orientation, depth, and fluking behavior most often when a boat approached closely (<10 m). Manatees were also more likely to change their depth when not on a seagrass bed and when actively fluking before a boat pass. Boat speed did not affect the occurrence or intensity of manatee response. Compared to fast approaches, however, slower passes allowed the manatee more time to respond, and behavioral change occurred earlier relative to the time of the boat's closest point of approach. We conclude that faster boats likely pose a greater risk of collision with manatees than do slower boats.
Daryl P. Domning, Research Associate, Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, D.C. 20560, and Laboratory of Evolutionary Biology, Department of Anatomy, College of Medicine, Howard University, Washington, D.C. 20059.
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