Bibliography and Index of the Sirenia and Desmostylia  

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"Kikuchi, Mumi"

 
 
 Kikuchi, Mumi; Suzuki, Miwa; Ueda, Keiichi; Miyahara, Hirokazu; Uchida, Senzo (detail)
   
2011
The differences in behavioral responses to a net obstacle between day and night in captive manatees: does entanglement happen at night?
Fisheries Science 77(5): 795-798. 2 tables. 1 fig. DOI: 10.1007/s12562-011-0388-x. Sept. 2011.
–ABSTRACT: Entanglement in fishing gear occurs in endangered manatees and may result in serious injury or death. Such incidents may happen more frequently at night when the animal's visual sense is limited. In this study, we examined the differences in behavioral response of captive manatees to a net obstacle during light (day) and dark (night) periods. We used a plastic net as the obstacle, and video-recorded the manatees' behavior. The experiments showed that captive manatees avoided the obstacle during the day more frequently than at night, which suggests that the manatees can perceive the obstacle more readily during light periods. However, there was no difference in the frequency of bumping or actively touching the obstacle between light and dark periods. The results suggest that the manatees can recognize the net obstacle even at night by purposely touching it, but they avoid it less frequently, and that entanglement during light periods may occur during accidental bumping, rather than from a failure to recognize it altogether.
 
 
 Kikuchi, Mumi; Silva, Vera Maria Ferreira da; Rosas, Fernando César Weber; Souza, Diogo; Miyazaki, Nobuyuki (detail)
   
2012
The implications of turning behaviour performed by Amazonian manatees after release into the wild.
Journal of Ethology 30(1): 187-190. 1 tab. 2 figs. DOI:10.1007/s10164-011-0290-0. Jan. 2012.
–ABSTRACT: Sirenians have dichromatic colour vision and tactile hairs but have not developed underwater echolocation. Amazonian manatees (Trichechus inunguis) live in turbid water and it has been unclear how they understand their surroundings. In this study, we recorded the 3D movements of two captive-raised Amazonian manatees. The results revealed that the manatees always swam in a circular pattern. Both animals used slower, narrower turning motions as they approached the flooded forests, which are abundant in aquatic vegetation. Therefore, we suggest that these two manatees swam in a circular pattern to detect all directions of their surroundings especially using sensitive facial bristles.
 
 
 Kikuchi, Mumi; Silva, Vera Maria Ferreira da; Rosas, Fernando César Weber; Miyazaki, Nobuyuki (detail)
   
2013
Application of acceleration data loggers to classify the behavior of captive Amazonian manatees (Trichechus inunguis).
Coastal Marine Science 34(1): 24-30. 2 tabs. 4 figs.
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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