Clownfish in hypoxic anemones replenish host O2 at only localised scales

Abstract The clownfish-anemone association exemplifies a symbiosis where both members benefit from nutrient exchange and protection from predators. Clownfish also perform aeration-like behaviour in their host anemones at night, but it is not yet known whether this is stimulated by the onset of hypox...

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Autores principales:	N. A. Herbert, S. Bröhl, K. Springer, A. Kunzmann
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/fce8d594dda34885b127df41026117e8
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spelling	oai:doaj.org-article:fce8d594dda34885b127df41026117e82021-12-02T16:07:00ZClownfish in hypoxic anemones replenish host O2 at only localised scales10.1038/s41598-017-06695-x2045-2322https://doaj.org/article/fce8d594dda34885b127df41026117e82017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06695-xhttps://doaj.org/toc/2045-2322Abstract The clownfish-anemone association exemplifies a symbiosis where both members benefit from nutrient exchange and protection from predators. Clownfish also perform aeration-like behaviour in their host anemones at night, but it is not yet known whether this is stimulated by the onset of hypoxia, and whether both members benefit from O2 replenishment. Oxygen at 3 distances above the sea anemone Entacmaea quadricolor (0.2, 1.2 and 2.2 cm) therefore was measured under 3 light levels (photon flux density = 0, 55 and 110 µmol m−2 s−1), with and without the anemonefish Amphiprion frenatus. Hypoxia (O2 < 50% air saturation) was recorded in the anemone, but only at 0.2 cm away from the anemone surface under dark conditions when A. frenatus was absent. This localised layer of hypoxia was eliminated by the presence of A. frenatus exhibiting aeration-like behaviour. Respirometry revealed that A. frenatus is extremely hypoxia tolerant (S crit = 14.3% at 25 °C), suggesting that aeration behaviour does not provide a major metabolic advantage to clownfish because they do not breathe water at 0.2 cm and are not metabolically constrained by O2 at distances ≥ 1.2 cm. That the aeration behaviour of A. frenatus facilitates only the metabolism of its O2-conforming host reveals a unique aspect of this symbiotic relationship.N. A. HerbertS. BröhlK. SpringerA. KunzmannNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q N. A. Herbert S. Bröhl K. Springer A. Kunzmann Clownfish in hypoxic anemones replenish host O2 at only localised scales
description	Abstract The clownfish-anemone association exemplifies a symbiosis where both members benefit from nutrient exchange and protection from predators. Clownfish also perform aeration-like behaviour in their host anemones at night, but it is not yet known whether this is stimulated by the onset of hypoxia, and whether both members benefit from O2 replenishment. Oxygen at 3 distances above the sea anemone Entacmaea quadricolor (0.2, 1.2 and 2.2 cm) therefore was measured under 3 light levels (photon flux density = 0, 55 and 110 µmol m−2 s−1), with and without the anemonefish Amphiprion frenatus. Hypoxia (O2 < 50% air saturation) was recorded in the anemone, but only at 0.2 cm away from the anemone surface under dark conditions when A. frenatus was absent. This localised layer of hypoxia was eliminated by the presence of A. frenatus exhibiting aeration-like behaviour. Respirometry revealed that A. frenatus is extremely hypoxia tolerant (S crit = 14.3% at 25 °C), suggesting that aeration behaviour does not provide a major metabolic advantage to clownfish because they do not breathe water at 0.2 cm and are not metabolically constrained by O2 at distances ≥ 1.2 cm. That the aeration behaviour of A. frenatus facilitates only the metabolism of its O2-conforming host reveals a unique aspect of this symbiotic relationship.
format	article
author	N. A. Herbert S. Bröhl K. Springer A. Kunzmann
author_facet	N. A. Herbert S. Bröhl K. Springer A. Kunzmann
author_sort	N. A. Herbert
title	Clownfish in hypoxic anemones replenish host O2 at only localised scales
title_short	Clownfish in hypoxic anemones replenish host O2 at only localised scales
title_full	Clownfish in hypoxic anemones replenish host O2 at only localised scales
title_fullStr	Clownfish in hypoxic anemones replenish host O2 at only localised scales
title_full_unstemmed	Clownfish in hypoxic anemones replenish host O2 at only localised scales
title_sort	clownfish in hypoxic anemones replenish host o2 at only localised scales
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/fce8d594dda34885b127df41026117e8
work_keys_str_mv	AT naherbert clownfishinhypoxicanemonesreplenishhosto2atonlylocalisedscales AT sbrohl clownfishinhypoxicanemonesreplenishhosto2atonlylocalisedscales AT kspringer clownfishinhypoxicanemonesreplenishhosto2atonlylocalisedscales AT akunzmann clownfishinhypoxicanemonesreplenishhosto2atonlylocalisedscales
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Clownfish in hypoxic anemones replenish host O2 at only localised scales

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