Diversity of filter feeding and variations in cross-flow filtration of five ram-feeding fish species

Frontiers in Marine Science

Marine Science

Alexander Blanke¹  Kristina Schreiber¹  Santiago Eduardo²  Jan Hagenmeyer³  Leandra Hamann⁴  Tobias Spanke⁵ 

[1] Bonn Institute for Organismic Biology, Section Animal Biodiversity, University of Bonn, Bonn, Germany;Bonn Institute for Organismic Biology, Section Animal Biodiversity, University of Bonn, Bonn, Germany;Otto-von-Guericke-Universität Magdeburg, Magdeburg, Germany;Bonn Institute for Organismic Biology, Section Animal Biodiversity, University of Bonn, Bonn, Germany;Ruhr-University Bochum, Bochum, Germany;Bonn Institute for Organismic Biology, Section Animal Biodiversity, University of Bonn, Bonn, Germany;The Whitney Laboratory for Marine Bioscience, University of Florida, Saint Augustine, FL, United States;Centre for Taxonomy and Morphology (ztm), Leibniz Institute for the Analysis of Biodiversity Change, Bonn, Germany;

关键词: filter-feeding;    cross-flow filtration;    morphometrics;    gill arch;    gill raker;    morphotypes;    particle separation;    water tunnel;   

DOI  :  10.3389/fmars.2023.1253083

 received in 2023-07-04, accepted in 2023-09-18,  发布年份 2023

来源: Frontiers

【 摘 要 】

IntroductionFilter-feeding fish separate food particles from the surrounding water by cross-flow filtration in which a suspension flows parallel to a porous filter medium, thereby transporting particles along the surface.MethodsHere, we investigate cross-flow filtration in five ram-feeding fish species from two groups, Scombridae (Scomber scombrus and Rastrelliger kanagurta) and Clupeidae (Clupea harengus, Sardina pilchardus, and Engraulis encrasicolus). Using a combination of morphometrics, micro-CT scanning, video analysis, and water tunnel experiments, we give a detailed description of the gill arch system, calculate filtration parameters, observe particle movement, and identify morphological traits that induce cross-flow filtration.ResultsOur findings suggest that these ram-feeding fish species use a combination of cross-flow and dead-end filtration as the underlying filtration principle. Specifically, the particles are transported along the surface of gill rakers and denticles towards the esophagus where they accumulate before being periodically swallowed. We infer three distinct morphotypes characterized by variations in geometry, mesh size, and surface structures, which indicate variations of the general mechanism.DiscussionThe description presented in this study contributes to the development of models for investigating the influence of morphological variation on fluid flow and particle retention in filter-feeding fish and on their ecology and biomimetic application.

【 授权许可】

Unknown   
Copyright © 2023 Hamann, Schreiber, Hagenmeyer, Eduardo, Spanke and Blanke