A novel obligate cultivation mutualism between damselfish and Polysiphonia algae.

A novel obligate cultivation mutualism between damselfish and Polysiphonia algae. Research Abstract Details 

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A novel obligate cultivation mutualism between damselfish and Polysiphonia algae. Abstract Text:

Hiroki Hata,Makoto Kato,

In cultivation mutualisms, farming animals prepare fields for cultivars, enhance their growth and harvest them. For example, in terrestrial ecosystems, plant-herbivore cultivation mutualisms arose between humans and their crops only relatively recently. We discovered an obligate cultivation mutualism between a damselfish and an alga in a coral reef ecosystem. The damselfish, Stegastes nigricans, manages algal farms through territorial defence against the invading grazers and through weeding of unpalatable algae. As a result, the algal farms of S. nigricans are dominated by one species, Polysiphonia sp. We performed an exhaustive survey of algal assemblages inside and outside the territories of five damselfish species around the Ryukyu Islands, Japan, using molecular and morphological characteristics. Polysiphonia sp. 1 grew exclusively inside the farms of S. nigricans, and never elsewhere. Since only Polysiphonia sp. 1 is harvested and consumed by the damselfish as a staple food, this interdependent relationship is an obligate cultivation mutualism. This is the first record of an obligate plant-herbivore cultivation mutualism in a marine ecosystem. Our data also suggest that three other Polysiphonia species are facultatively mutual with, commensal with, or parasitic on other damselfish species.

A novel obligate cultivation mutualism between damselfish and Polysiphonia algae. Publishing Authors By Initials

H Hata,M Kato,

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A novel obligate cultivation mutualism between damselfish and Polysiphonia algae. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Biology letters

VOLUME: 2

Page Numbers: 593-6

Journal Abbreviation: Biol. Lett.

ISSN: 1744-9561

DAY: 22

MONTH: Dec

YEAR: 2006

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LANGUAGE: eng

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Grant and Affiliation Information for A novel obligate cultivation mutualism between damselfish and Polysiphonia algae.

AFFILIATION: Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-Nihonmatsu, Sakyo, Kyoto 606-8501, Japan. hata@d01.mbox.media.kyoto-u.ac.jp

Country: England

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MEDLINETA: Biol Lett

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