On Pseudocorynactis species and another related genus from the Indo-Pacific (Anthozoa: Corallimorphidae)

Revista de la Facultad de Ciencias Agrarias (Impact Factor: 0.47). 01/2010; XXI.
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Available from: Arthur R. Bos
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    • "Apart from juvenile fishes, commensal shrimps dwell among the branches and polyps of xeniid corals (Marin 2011;Marin et al. 2011). Similarly, the anemone-like polyps of the corallimorpharian Paracorynactis hoplites Haddon and Shackleton, 1893 host a combination of well-camouflaged commensal shrimps and juvenile fishes, including representatives of the Labridae (Ocaña et al. 2010;Bos et al. 2011b). A possible strategy to prey on associated fauna may have been developed by the venomous sea anemone Phyllodiscus semoni Kwietniewski, 1897, which can mimic soft corals such as the xeniid Efflatounaria sp. "
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    ABSTRACT: Polyps of the corallimorpharian Paracorynactis hoplites were studied in coral reefs of the Davao Gulf, the Philippines, between October 2007 and January 2009. Polyps of Paracorynactis hoplites preyed mainly on echinoderms. Predation on seven species of echinoderms was observed in the fi eld (four asteroids, two echinoids and one holothurian); an additional ten species were accepted during feeding trials (four asteroids, four echinoids and two holothurians). The echinoids Diadema setosum, Diadema savignyi and Echinotrix calamaris, and the ophiuriod Ophiomastix sp. were not adversely affected by the polyps. The opisthobranch Phyllidiella pustulosa (Mollusca) was accepted during feeding trials, whereas the gastropod Cypraea tigris was not adversely affected. In a feeding experiment, polyps of Paracorynactis hoplites (maximum diameter 170 mm) completely ingested crown-of-thorns sea stars (Acanthaster planci) of up to 340 mm diameter. The polyps had a mean daily biomass uptake of 24.5 g d-1 when having a single-species asteroid diet. Fishes of several species of families Apogonidae, Gobiidae, Labridae, Pomacentridae, and Pseudochromidae as well as the shrimps (Periclimenes holthuisi, Periclimenes lacerate, Stenopus hispidus and Thor amboinensis) lived near or among the tentacles of the polyps.
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