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Swimming Sea Cucumbers (Echinodermata: Holothuroidea): A Survey, with Analysis of Swimming Behavior in Four Bathyal Species

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dc.contributor.author Miller, J. E.
dc.contributor.author Pawson, David L.
dc.date.accessioned 2007-05-11T17:13:44Z en_US
dc.date.accessioned 2013-03-18T14:08:22Z
dc.date.available 2007-05-11T17:13:44Z en_US
dc.date.available 2013-03-18T14:08:22Z
dc.date.issued 1990-06-01
dc.identifier.citation Smithsonian Contributions to the Marine Sciences; 35
dc.identifier.issn 0196-0768 en_US
dc.identifier.uri http://hdl.handle.net/10088/1130 en_US
dc.description Files listed include high and low resolution reproductions. en_US
dc.description.abstract New information on swimming behavior of four species of deep-sea holothurians has been obtained using the research submersibles Johnson-Sea-Link (Harbor Branch Oceanographic Institution) and Pisces V (University of Hawaii, HURL Program). Hansenothuria benti Miller and Pawson and Enypniastes eximia Theel were studied off the Bahama Islands, Paelopatides retifer Fisher off the Hawaiian Islands, and Pelagothuria natatrix Ludwig off the Galapagos Islands. Video recordings were made of swimming behavior, and individuals of all species were collected at the time of observation. Four contrasting life modes are represented: H. benti lives and feeds on the seafloor, but when disturbed it can swim vigorously for several minutes by rapidly flexing the anterior and posterior ends of the body into S curves. Enypniastes eximia swims almost continuously, briefly settling to the seafloor to ingest surface sediments. The bulbous body is propelled upwards by rhythmic pulsation of a webbed anterodorsal veil; stability during swimming is maintained by counteractive flexing of posterolateral veils. Paelopatides retifer lives on or near the seafloor and has been found up to 300 meters above the seafloor. The swimming behavior of this species combines locomotory movements of the two preceding species. An anterior veil pulsates, and the posterior half of the body flexes into S curves. Pelagothuria natatrix is truly pelagic, floating or drifting near the seafloor or high in the water column. Swimming is effected by infrequent and irregular pulsation of an enormous anterior veil. There is no evidence to suggest that P. natatrix descends to feed on the seafloor. Published data on the approximately 25 known species of swimming holothurians are summarized. Probable reasons for swimming behavior are discussed. Swimming appears to be most useful in predator avoidance, escape from physical hazards, locomotion, seeking out suitable substrata for feeding, and dispersal of juveniles or adults. en_US
dc.format.extent 9593127 bytes en_US
dc.format.extent 1310918 bytes en_US
dc.format.mimetype application/pdf en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.title Swimming Sea Cucumbers (Echinodermata: Holothuroidea): A Survey, with Analysis of Swimming Behavior in Four Bathyal Species
dc.identifier.srbnumber 15571
dc.identifier.eISSN 1943-667X en_US
dc.identifier.doi 10.5479/si.01960768.35.1
rft.jtitle Smithsonian Contributions to the Marine Sciences
rft.issue 35
rft.spage 1
rft.epage 18

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