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Low predation intensity on the stalked crinoid Democrinus sp. (Echinodermata), in Roatán, Honduras, reveals deep water as likely predation refuge

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Predation has been hypothesized to play a key role in the evolutionary and ecological history of crinoids. Whereas evidence of predation on crinoids in the form of injuries can be common, quantifying predation intensity, which is critical for properly evaluating such hypotheses, has proven challenging. Here, we used a longitudinal approach to quantify predation intensity on the extant, deepwater, stalked crinoid, Democrinus sp. These quantitative estimates are based on data collected from a manned submersible during expeditions conducted over a 2-yr span. These results indicate that this deepwater crinoid is subject to much lower predation intensity than are crinoids living in shallow-water, consistent with (1) an inverse relationship between predation intensity and depth, and (2) the hypothesis that for stalked crinoids, which are unable to handle high predation intensity, deep water is a refugium.
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Document Type: Research Article

Affiliations: 1: University of Michigan Museum of Paleontology, 1105 North University Ave, Ann Arbor, Michigan 48109;, Email: [email protected] 2: University of Michigan Museum of Paleontology, 1105 North University Ave, Ann Arbor, Michigan 48109

Publication date: January 1, 2021

This article was made available online on May 14, 2020 as a Fast Track article with title: "Low predation intensity on the stalked crinoid Democrinus sp. (Echinodermata) in Roatán, Honduras reveals deep water as likely predation refuge".

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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