Abstract
In an ecosystem, which is apparently very limited in N and P, the planktivorous damselfish Chromis chromis acts as an important vector in transferring nutrients from the pelagic into littoral food webs. C. chromis are more efficient at absorbing nutrients from their diet than herbivorous Pomacentridae, and excrete more faeces in the spring when their plankton food is more abundant. Faeces released in the water column sink rapidly to the substratum and are consumed by herbivorous and omnivorous fish. Faeces released into night-shelters are rapidly consumed by invertebrate detritivores, and particularly mobile scavengers, such as shrimps and hermit crabs. Night-time accrual of Chromis faeces represents a very important flux of N and P. Such fluxes are predictable in time and space and have thus far been ignored in studies of the western Mediterranean.
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Acknowledgements
We thank the staff of STARESO (Station de Recherche Sous-Marine et Océanographiques) for their hospitality and assistance in the field, also Dr. Costas Frangoulis for lending me his thesis and providing additional zooplanton data. Two anonymous reviewers provided constructive comments and have contributed significantly to improving this manuscript. J.K. Pinnegar was supported by the Fisheries Society of the British Isles 1996 studentship.
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Communicated by J. P. Thorpe, Port Erin
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Pinnegar, J.K., Polunin, N.V.C. Planktivorous damselfish support significant nitrogen and phosphorus fluxes to Mediterranean reefs. Marine Biology 148, 1089–1099 (2006). https://doi.org/10.1007/s00227-005-0141-z
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DOI: https://doi.org/10.1007/s00227-005-0141-z