Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/57280
Title: Food supply effects on the asexual reproduction and respiratory metabolism of Aurelia aurita polyps
Authors: Purcell, Jennifer E.
Bondyale Juez, Daniel Rickue 
Romero-Kutzner, Vanesa 
Martínez, Ico 
Caprioli, Rosa
Tames-Espinosa, Mayte 
Almunia Portolés,Javier 
Alonso, Ester
Packard, Theodore Train 
Gómez, May 
UNESCO Clasification: 251001 Oceanografía biológica
Keywords: Jellyfish
Scyphistoma
Starvation
Respiration
ETS
IDH
CO2 production
Metabolism
Issue Date: 2019
Project: Metabolismo Respiratorio de Medusas en Aguas de Canarias: Mermac 
Journal: Hydrobiologia 
Abstract: Because Aurelia spp. blooms have important regional effects, it is urgent to determine factors that may affect their proliferation and their effects on food webs. The life cycle of most scyphozoans includes an attached stage (polyp or scyphistoma) that reproduces asexually. To test the effects of food availability (unfed, fed 1-, 2-, or 3-times weekly), we measured production rates, mass, and metabolism of Aurelia aurita polyps. Metabolic measurements were physiological respiratory O2 consumption (R), potential O2 consumption (Φ), and potential CO2 production (ψNADP). Φ and ψNADP were calculated from enzymatic activities of the respiratory electron transport system (ETS) and from the CO2-producing enzyme, NADP+-dependent isocitrate dehydrogenase (NADP-IDH), respectively. The production of polyps dramatically increased from ~ 0.1 polyp day−1 (unfed) to ~ 0.65 polyp day−1 (fed 3-times week−1) over 33 days. Mass and metabolism (R, Φ, ψNADP) per polyp were significantly lower in unfed polyps, but indistinguishable among fed polyps. Our results suggested that the polyps maintained low-metabolic rates, putting available energy into asexual reproduction. The polyps were adapted to survive and reproduce when unfed, confirming their contribution to population persistence and potential jellyfish blooms.
URI: http://hdl.handle.net/10553/57280
ISSN: 0018-8158
DOI: 10.1007/s10750-019-04057-4
Source: Hydrobiologia [ISSN 0018-8158],
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