Show simple item record

AuthorCruza, Joana
AuthorTeodosio, M. Alexandra
AuthorBen-Hamadou, Radhouane
AuthorChicharo, Luis
AuthorGarrido, Susana
AuthorRe, Pedro
AuthorSantos, A. Miguel P.
Available date2020-11-26T11:21:09Z
Publication Date2017
Publication NameEstuarine, Coastal and Shelf Science
ResourceScopus
URIhttp://dx.doi.org/10.1016/j.ecss.2016.12.028
URIhttp://hdl.handle.net/10576/17106
AbstractEstimates of copepod secondary production are of great importance to infer the global organic matter fluxes in aquatic ecosystems and species-specific responses of zooplankton to hydrologic variability. However, there is still no routine method to determine copepods secondary production in order to eliminate time consuming experimental analyses. Therefore, we determined whether there is a correlation between Egg Production Rates (EPR) and RNA:DNA ratios of Acartia species, by measuring their seasonal and spatial variability and the influence of environmental factors for Acartia sp. collected in the Guadiana river estuary. EPR of Acartia tonsa was positively related with chlorophyll a concentration, freshwater inflow and biomass of dinoflagellates, while Acartia clausi was only related to dinoflagellates. Dinoflagellates seem to be the optimal food item influencing the reproduction of both Acartia species in the studied area. The biochemical index RNA:DNA was positively related to EPR, indicating that it is a good proxy of copepod production and a promising method to use in the future to estimate secondary production.
SponsorThe authors wish to thank to Antero Fernandes, David Pil? and Renata Gon?alves for their support during field work. J.C. was supported by Portuguese Foundation for Science and Technology (FCT) through a Doctoral Fellowship (SFRH/BD/28198/2006). MAT would like to thanks also FCT through a sabbatical fellowship (SFRH/BSAB/113684/2015). The authors also acknowledge European Regional Development Fund (COMPETE program- Operational Competitiveness Programme), and by national funds from FTC through project UID/Multi/04326/2013. S.G. is supported by FCT through a Post-Doctoral Fellowship (SFRH/BPD/105419/2014) and by the Investigador FCT Program (IF/01546/2015).
Languageen
PublisherAcademic Press
SubjectAcartia clausi
Acartia tonsa
Guadiana river estuary
Hatching success
Secondary production
Zooplankton
TitleRNA:DNA ratios as a proxy of egg production rates of Acartia
TypeArticle
Pagination96-109
Volume Number187
dc.accessType Abstract Only


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record