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Anemonefish oxygenate their anemone hosts at night

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dc.contributorRaymond P. Henry, henryrp@auburn.eduen_US
dc.creatorSzczebak, Joseph T.
dc.creatorHenry, Raymond P.
dc.creatorAl-Horani, Fuad A.
dc.creatorChadwick, Nanette
dc.description.abstractMany stony coral-dwelling fishes exhibit adaptations to deal with hypoxia among the branches of their hosts; however, no information exists on the respiratory ecophysiology of obligate fish associates of non-coral organisms such as sea anemones and sponges. This study investigated metabolic and behavioral interactions between two-band anemonefish (Amphiprion bicinctus) and bulb-tentacle sea anemones (Entacmaea quadricolor) at night. We measured the net dark oxygen uptake (VO2, μmol O2h–1) of fish–anemone pairs when partners were separate from each other, together as a unit, and together as a unit but separated by a mesh screen that prevented physical contact. We also measured the effects of water current on sea anemone VO2 and quantified the nocturnal behaviors of fish in the absence and presence of host anemones in order to discern the impacts of anemone presence on fish behavior. Net VO2 of united pairs was significantly higher than that of both separated pairs and united pairs that were separated by a mesh screen. Anemone VO2 increased with flow rate from 0.5 to 2.0cms–1, after which VO2 remained constant up to a water flow rate of 8.0cms–1. Furthermore, the percentage time and bout frequency of flow-modulating behaviors by fish increased significantly when anemones were present. We conclude that physical contact between anemonefish and sea anemones elevates the VO2 of at least one of the partners at night, and anemonefish behavior at night appears to oxygenate sea anemone hosts and to augment the metabolism of both partners.en_US
dc.publisherThe Company of Biologistsen_US
dc.relation.ispartofJournal of Experimental Biologyen_US
dc.rights© The Company of Biologists. © The Authors. 2013. This manuscript version is made available under the CC-BY-NC-ND 4.0 license. Item should be cited as: Szczebak, J.T., Henry, R.P., Al-Horani, F.A. and Chadwick, N.E., 2013. Anemonefish oxygenate their anemone hosts at night. Journal of Experimental Biology, 216(6), pp.970-976.en_US
dc.subjectmutualism, ecophysiology, Amphiphrion bicinctus, sea anemone, oxygen consumption, nocturnal behavior.en_US
dc.titleAnemonefish oxygenate their anemone hosts at nighten_US
dc.type.genreJournal Article, Academic Journalen_US

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