Use of respiration rates of scyphozoan jellyfish to estimate their effects on the food web

Purcell, Jennifer E., Fuentes, Veronica, Atienza, Dacha, Tilves, Uxue, Astorga, Diana, Kawahara, Masato and Hays, Graeme C. 2010, Use of respiration rates of scyphozoan jellyfish to estimate their effects on the food web, Hydrobiologia, vol. 645, no. 1, pp. 135-152, doi: 10.1007/s10750-010-0240-9.

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Title Use of respiration rates of scyphozoan jellyfish to estimate their effects on the food web
Author(s) Purcell, Jennifer E.
Fuentes, Veronica
Atienza, Dacha
Tilves, Uxue
Astorga, Diana
Kawahara, Masato
Hays, Graeme C.ORCID iD for Hays, Graeme C.
Journal name Hydrobiologia
Volume number 645
Issue number 1
Start page 135
End page 152
Total pages 18
Publisher Springer
Place of publication Berlin, Germany
Publication date 2010-05
ISSN 0018-8158
Keyword(s) jellyfish
Summary One of the main objectives of research on jellyfish is to determine their effects on the food web. They are voracious consumers that have similar diets to those of zooplanktivorous fish, as well as eating microplankton and ichthyoplankton. Respiration rates (RRs) can be used to estimate the amount of food needed to balance metabolism, and thereby estimate minimum ingestion. We compiled RRs for scyphozoan medusae in three suborders (Semeaostomeae, Rhizostomeae, and Coronatae) to determine if a single regression could relate RRs to mass for diverse scyphomedusan species. Temperature (7–30°C) was not a significant factor. RRs versus wet weight (WW) regressions differed significantly for semeaostome and rhizostome medusae; however, RRs versus carbon mass over five-orders of magnitude did not differ significantly among suborders. RRs were isometric against medusa carbon mass, with data for all species scaling to the power 0.94. The scyphomedusa respiration rate (SRR) regression enables estimation of RR for any scyphomedusa from its carbon mass. The error of the SRR regression was ±72%, which is small in comparison with the 1,000-fold variation in field sampling. This predictive equation (RR in ml O2 d−1 = 83.37 * g C0.940) can be used to estimate minimum ingestion by scyphomedusae without exhaustive collection of feeding data. In addition, effects of confinement on RRs during incubation of medusae were tested. Large medusae incubated in small container volumes (CV) relative to their size (ratios of CV:WW < 50) had RRs ~one-tenth those of medusae in relatively larger containers. Depleted oxygen during incubation did not depress RRs of the medusae; however, swimming may have been restricted and respiration reduced in consequence. We briefly review other problems with RR experiments and suggest protocols and limitations for estimating ingestion rates of jellyfish from metabolic rates.
Language eng
DOI 10.1007/s10750-010-0240-9
Field of Research 069999 Biological Sciences not elsewhere classified
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2010, Springer
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