Abstract

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 615:121-131 (2019) - DOI: https://doi.org/10.3354/meps12920 Hidden predators on coral reefs: muricid consumption of vermetids A. L. Brown1,2,*, T. K. Frazer2,3, G. Li4, J. R. Hilsenroth2, J. S. Shima5, C. W. Osenberg1 1Odum School of Ecology, University of Georgia, Athens, GA 30602, USA 2School of Natural Resource and Environment, University of Florida, Gainesville, FL 32611, USA 3School of Forest Resources and Conservation, Fisheries and Aquatic Sciences Program, University of Florida, Gainesville, FL 32611, USA 4UC Berkeley Richard B. Gump Marine Station, BP 244, Maharepa 98728, Mo’orea, French Polynesia 5School of Biological Sciences, Victoria University of Wellington, Wellington 6140, New Zealand *Corresponding author: anyabrown@ufl.edu ABSTRACT: Predators, through their effects on prey densities, sizes, and behaviors, can shape ecological communities. Thus, quantitative assessments of predator-prey relationships are key to understanding these effects. Here, we documented the patterns and processes underlying the effects of 2 predatory muricid gastropods, Mancinella armigera and Menathais tuberosa, on the sessile vermetid gastropod Ceraesignum maximum. We used a combination of field surveys and manipulative lab and field experiments to quantify muricid abundances, predator feeding rates, and effects of predator density on vermetid mortality. The 2 predators exhibited spatial segregation, with M. armigera being more common close to the reef crest and M. tuberosa increasing in density away from and shoreward of the reef crest. We demonstrated that recently killed vermetids were more common in the vicinity of M. armigera. Laboratory assays revealed that M. armigera killed 0.55 C. maximum predator-1 d-1, a rate that was ~60% greater than for M. tuberosa. Although the 2 predators were spatially segregated in the field, they did not demonstrate interference competition or intraguild predation in the lab. Consumption rates of C. maximum by M. armigera in the field were approximately equal to those quantified in the lab, and although consumption rates decreased over time, predator density had no effect on predator consumption rate. In addition, we observed no evidence of size selectivity by predators. This study is the first to quantitatively examine predator-prey interactions involving C. maximum, and our findings suggests that muricids can limit vermetid populations where both are present. KEY WORDS: Predation · Ceraesignum maximum · Multiple predator effects · Coral reefs Full text in pdf format Supplementary material PreviousNextCite this article as: Brown AL, Frazer TK, Li G, Hilsenroth JR, Shima JS, Osenberg CW (2019) Hidden predators on coral reefs: muricid consumption of vermetids. Mar Ecol Prog Ser 615:121-131. https://doi.org/10.3354/meps12920 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 615. Online publication date: April 18, 2019 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2019 Inter-Research.

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