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Title: Responses of Five Holothurian Species to Attacks by a Predatory Gastropod, Tonna perdix 
Author: Kropp, Roy K.
Date: 1982-10
Publisher: University of Hawai'i Press
Citation: Kropp RK. 1982. Responses of five holothurian species to attacks by a predatory gastropod, Tonna perdix. Pac Sci 36(4): 445-452.
Abstract: In the laboratory Tonna perdix attacked and often engulfed individuals
of five holothurian species. Two species, Stichopus chloronotus and
S. horrens, sometimes escaped attacks by shedding a piece of body wall and
bounding away from the predator. Bounding employed an exaggerated, direct
arching peristalsis and was much faster than ordinary crawling. The general
response of each of the other three species, Holothuria atra, H. cinerascens, and
H. hilla, was a shortening of the body lengthwise accompanied by a swelling of
the body into a spherelike shape. This response was not usually effective as an
escape maneuver. Only H. hilla eviscerated during attacks and this was a direct
result of penetration of the visceral cavity by the tonnid radula.
ISSN: 0030-8870

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