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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50828

Title: Diving as an anti-predator behavior in mosquito pupae
Authors: Amit Kant Awasthi
Cheng-Han Wu
Jiang-Shiou Hwang
Contributors: 國立臺灣海洋大學:生命科學暨生物科技學系
Keywords: Culex
Anti-predator behavior
Diving behavior
Diving angle
Escape success
Date: 2012-09
Issue Date: 2018-10-26T08:19:50Z
Publisher: Zoological Studies
Abstract: Abstract: Amit Kant Awasthi, Cheng-Han Wu, and Jiang-Shiou Hwang (2012) Diving as an anti-predator behavior in
mosquito pupae. Zoological Studies 51(8): 1225-1234. Diving is considered an anti-predator (escape) behavior
in mosquito pupae. However, pupal diving has not yet been properly studied or characterized. Our videographic
2-dimensional observations in this study elucidate the pupal behavior of Culex pipiens quinquefasciatus in the
presence and absence of the predatory fish Poecilia reticulata. Pupae exhibited significantly higher speeds
and more-diverse escape responses in the presence of the fish compared to the control. These escape
responses included shallow, medium, and deep diving, surface movements, floating up, and fish-following
upward movement. The no-predator control showed merely shallow diving and surface movements. Pupae
adjusted their self-righting behavior according to the fish-following speed and effectively shortened their selfrighting time during a fast chase. Although diving pupae preferred smaller acute angles in the presence and
absence of predators, the medium diving angles were significantly higher than the shallow diving angles in the
presence of a predator. Pupae achieved complete escape success during diving down, but the escape success
of a pupa depended on whether or not the predatory fish continued to pursue the pupa. Although 96% of pupae
successfully escaped during the 1st fish attack, their ultimate escape success decreased when fish continued
their pursuit. Pupae had more responses and significantly higher escape speeds in the presence of a predator
than in the control. Mosquito pupae diving behaviors demonstrate their escape behavior during predator
encounters. Diving tactics in Culex pupae that help them escape from aquatic predators lead to increased
fitness.
Relation: 51(8) pp.1225-1234
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50828
Appears in Collections:[生命科學暨生物科技學系] 期刊論文

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