![]() Journal of Sea Research 113:51-57.įunding: CN and MKH are grateful to be funded by the Studienstiftung des deutschen Volkes with a PhD fellowship. First 3D reconstruction of the rhizocephalan root system using MicroCT. are available to all interested researchers upon request from Christoph Noever, University of Bergen, because this data is already published under Noever, C., Keiler, J., & Glenner, H. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.ĭata Availability: Data of Sylon spp. Received: AugAccepted: JPublished: July 5, 2017Ĭopyright: © 2017 Nagler et al. PLoS ONE 12(7):Įditor: Claude Wicker-Thomas, CNRS, FRANCE With this study we add new and significant information to our global understanding of the evolution of parasitic castrators, of interactions between a parasitic castrator and its host and of different parasitic strategies within parasitic castrators exemplified by rhizocephalans.Ĭitation: Nagler C, Hörnig MK, Haug JT, Noever C, Høeg JT, Glenner H (2017) The bigger, the better? Volume measurements of parasites and hosts: Parasitic barnacles (Cirripedia, Rhizocephala) and their decapod hosts. Comparing the rhizocephalan Sylon hippolytes, a parasite of caridean shrimps, and representatives of Peltogaster, parasites of hermit crabs, we could match their different traits on a reconstructed relationship. Our results show positive correlations between the volume of (1) entire rhizocephalan (externa + interna) and host body, (2) rhizocephalan externa and host body, (3) rhizocephalan visceral mass and rhizocephalan body, (4) egg mass and rhizocephalan externa, (5) rhizocephalan egg mass and their egg number. Using advanced imaging methods (micro-CT in conjunction with 3D modeling), we measured the volume of parasitic structures (externa, interna, egg mass, egg number, visceral mass) and the volume of the entire host. ![]() Thus, the ratio of the host and parasite sizes is crucial for the understanding of the parasite’s energetic cost. ![]() Parasitism results in the castration of their hosts, achieved by absorbing the entire reproductive energy of the host. The adult female parasite consists of a body that can be differentiated into two distinct regions: a sac-like structure containing the reproductive organs (the externa), and a trophic, root like system situated inside the hosts body (the interna). Rhizocephala, a group of parasitic castrators of other crustaceans, shows remarkable morphological adaptations to their lifestyle. ![]()
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