NDLI: Nudibranch predation and dietary preference for the polyps of Aurelia labiata (Cnidaria: Scyphozoa)

Content Provider	Springer Nature Link
Author	Hoover, Richard A. Armour, Ruth Dow, Ian Purcell, Jennifer E.
Copyright Year	2012
Abstract	There is concern that jellyfish blooms may be increasing worldwide. Some factors controlling population size, such as temperature and food, often have been studied; however, the importance of predators is poorly known. Aeolid nudibranchs feed on cnidarians, but their predation on the benthic polyps of scyphozoan rarely has been documented. To understand the potential of nudibranchs to consume polyps, we tested several predation preference hypotheses with the generalist feeding nudibranch, Hermissenda crassicornis, and polyps of the common moon jellyfish, Aurelia labiata. Of the six prey species tested during feeding experiments, A. labiata polyps and the tunicate Distaplia occidentalis were significantly preferred. Nudibranch size, diurnal cycle, and ingestive conditioning did not significantly influence prey choice. Nudibranchs showed significant positive chemotaxis toward living polyps, hydroids, and tunicates, but not to sea anemones. Nudibranch chemotaxis was significantly more positive to polar extract of A. labiata than of D. occidentalis. Consumption of polyps was correlated with nudibranch size, with mean consumption by large nudibranchs (>0.92 g) of about 31 polyps h−1. Three other nudibranch species also ate A. labiata polyps. Our results emphasize the potential importance of predation for controlling jellyfish benthic polyp populations and consequent jellyfish blooms.
Starting Page	199
Ending Page	213
Page Count	15
File Format	PDF
ISSN	00188158
Journal	Hydrobiologia
Volume Number	690
Issue Number	1
e-ISSN	15735117
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-04-05
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Jellyfish Predator Selection Hydroid Tunicate Sea anemone Chemotaxis Ecology Freshwater & Marine Ecology Zoology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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