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Next article FreeAbout the CoverPDFPDF PLUSFull Text Add to favoritesDownload CitationTrack CitationsPermissionsReprints Share onFacebookTwitterLinked InRedditEmailQR Code SectionsMoreCoverThe copepod pictured on the cover is a harpacticoid, possibly a Tigriopus. Copepods are the most abundant metazoan in the earth’s waters and are found in marine and fresh water, from lakes and streams to ocean trenches. They range in size from 0.1 to 10 mm and are a crucial link in the aquatic food web for fish and other planktivores.In this issue (pp. 62–71), A. S. Tyrell, N. S. Fisher, and D. M. Fields report on their study of two marine calanoid copepods, Acartia tonsa (Dana, 1849) and Parvocalanus crassirostris (Dahl F., 1894). They describe an experiment that independently tested temperature and viscosity effects on the respiration of these two species. They find that although temperature influences oxygen consumption rates, water viscosity has a minimal effect on oxygen uptake. Through examination of net carbon assimilation rates and modeling, they relate the influence of temperature on oxygen consumption to variation in feeding strategies in different copepod species.Credits: Photo, © Håkan Kvarnström, hakankvarnstrom.com Next article DetailsFiguresReferencesCited by The Biological Bulletin Volume 239, Number 1August 2020 Published in association with the Marine Biological Laboratory Article DOIhttps://doi.org/10.1086/711317 Views: 142 © 2020 by The University of Chicago. All rights reserved.PDF download Crossref reports no articles citing this article.