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- W2330780003 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 510:255-263 (2014) - DOI: https://doi.org/10.3354/meps10799 Body size reduction under starvation, and the point of no return, in ephyrae of the moon jellyfish Aurelia aurita Zhilu Fu1, Masashi Shibata1, Ryosuke Makabe2, Hideki Ikeda1, Shin-ichi Uye1,* 1Graduate School of Biosphere Science, Hiroshima University, 4-4 Kagamiyama 1 Chome, Higashi-Hiroshima 739-8528, Japan 2Faculty of Science and Engineering, Ishinomaki Senshu University, 1 Shinmito Minamisakai, Ishinomaki 986-8580, Japan *Corresponding author: suye@hiroshima-u.ac.jp ABSTRACT: Scyphozoan ephyrae need to start feeding before their endogenous nutritional reserves run out, and the success of feeding and growth is crucial to their recruitment into the medusa population. To evaluate starvation resistance in first-feeding ephyrae of the moon jellyfish Aurelia aurita s.l., we determined their point of no return (PNR50), i.e. days of starvation after which 50% of ephyrae die even if they then feed. PNR50 values were 33.8, 38.4 and 58.6 d at 15, 12 and 9°C, respectively. Before reaching PNR50, the ephyrae showed significant body size reduction: ca. 30 and 50% decrease in disc diameter and carbon content, respectively. These PNR50 values are nearly 1 order of magnitude longer than those of larval marine molluscs, crustaceans and fishes, which is attributable to the ephyra’s extremely low metabolic (i.e. respiration) rate relative to its copious carbon reserves. Such a strong endurance under prolonged starvation is likely an adaptive strategy for A. aurita ephyrae, the release of which is programmed to occur during the annual period of lowest temperatures, allowing them to cope with the concomitant seasonal food scarcity. Future studies are needed to identify causes of death for wild ephyrae, which are prone to starvation and/or predation, to forecast outbreaks prior to the season of medusa blooms. KEY WORDS: Jellyfish bloom · Mortality · Population dynamics · Predation · Starvation Full text in pdf format Supplementary material PreviousNextCite this article as: Fu Z, Shibata M, Makabe R, Ikeda H, Uye S (2014) Body size reduction under starvation, and the point of no return, in ephyrae of the moon jellyfish Aurelia aurita. Mar Ecol Prog Ser 510:255-263. https://doi.org/10.3354/meps10799 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 510. Online publication date: September 09, 2014 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2014 Inter-Research." @default.
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- W2330780003 title "Body size reduction under starvation, and the point of no return, in ephyrae of the moon jellyfish Aurelia aurita" @default.
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