Matches in SemOpenAlex for { <https://semopenalex.org/work/W2034856095> ?p ?o ?g. }
- W2034856095 endingPage "98" @default.
- W2034856095 startingPage "85" @default.
- W2034856095 abstract "Recent literature suggests that heterotrophic protists could improve the biochemical constituents of poor quality algae for subsequent use by higher trophic levels, a phenomenon dubbed “trophic upgrading”. We conducted experiments to test trophic upgrading effects on the omnivorous calanoid copepod Acartia tonsa. Two heterotrophic protists, Oxyrrhis marina and Gymnodinium dominans, were grown on three algal species of different nutritional qualities: Dunaliella tertiolecta, Isochrysis galbana and Rhodomonas salina. In parallel incubations, the copepods were fed the heterotrophic protists or the algae that the protists grew on. We measured the ingestion rate, egg production rate and egg hatching success of the copepods in each treatment. Comparison of the egg production efficiency (EPE; egg carbon production/carbon ingestion×100%) between parallel diet treatments allowed us to calculate the trophic upgrading index (TUI; ratio of EPE-heterotrophic protist to EPE-alga). The copepods ingested similar amount, or 20–30% more algae than heterotrophic protists. Daily rations ranged 50–122% of body C per day. Copepods feeding on O. marina that grew on D. tertiolecta had higher egg production rate and egg hatching success than copepods feeding on D. tertiolecta directly, and the resultant TUI between the two treatments was 19.7. Similarly, the copepod egg production was improved by G. dominans that grew on D. tertiolecta and the resultant TUI was 23.3. TUI was near 1 between I. galbana treatment and the parallel heterotrophic protist treatments, indicating no or little trophic upgrading effects on the copepod's egg production. However, egg hatching success was significantly lower with G. dominans growing on I. galbana. O. marina that grew on R. salina induced a lower EPE relative to the alga itself, yielding a TUI of less than 1. Biochemical data showed that the heterotrophic protists contained eicosapentanoic acid (EPA) and docosahexanoic acid (DHA) even when they fed on alga that lacked these essential fatty acids, which may explain some of the observed trophic upgrading effects and species-specific differences in our experiments. However, our data also suggested that dietary EPA and DHA could not be the sole factors regulating the copepod's reproductive output, and that egg production and egg hatching appeared to have different nutritional requirements and respond differently to the copepod's diets." @default.
- W2034856095 created "2016-06-24" @default.
- W2034856095 creator A5039135345 @default.
- W2034856095 creator A5048514503 @default.
- W2034856095 date "2005-05-01" @default.
- W2034856095 modified "2023-09-25" @default.
- W2034856095 title "Trophic modification of food quality by heterotrophic protists: species-specific effects on copepod egg production and egg hatching" @default.
- W2034856095 cites W1564438346 @default.
- W2034856095 cites W1965372719 @default.
- W2034856095 cites W1966178340 @default.
- W2034856095 cites W1972976303 @default.
- W2034856095 cites W1975073465 @default.
- W2034856095 cites W1975499757 @default.
- W2034856095 cites W1979065060 @default.
- W2034856095 cites W1981421679 @default.
- W2034856095 cites W1985223581 @default.
- W2034856095 cites W1986621100 @default.
- W2034856095 cites W1998786646 @default.
- W2034856095 cites W2001922109 @default.
- W2034856095 cites W2004313625 @default.
- W2034856095 cites W2006716271 @default.
- W2034856095 cites W2012838166 @default.
- W2034856095 cites W2013416031 @default.
- W2034856095 cites W2017099774 @default.
- W2034856095 cites W2018035963 @default.
- W2034856095 cites W2020190465 @default.
- W2034856095 cites W2025015574 @default.
- W2034856095 cites W2045224607 @default.
- W2034856095 cites W2047781423 @default.
- W2034856095 cites W2075168674 @default.
- W2034856095 cites W2082476651 @default.
- W2034856095 cites W2082678969 @default.
- W2034856095 cites W2095101020 @default.
- W2034856095 cites W2097529929 @default.
- W2034856095 cites W2101292717 @default.
- W2034856095 cites W2105722876 @default.
- W2034856095 cites W2118616044 @default.
- W2034856095 cites W2120002606 @default.
- W2034856095 cites W2134390122 @default.
- W2034856095 cites W2137682784 @default.
- W2034856095 cites W2140434929 @default.
- W2034856095 cites W2140709637 @default.
- W2034856095 cites W2143182887 @default.
- W2034856095 cites W2146024532 @default.
- W2034856095 cites W2148498334 @default.
- W2034856095 cites W2148837415 @default.
- W2034856095 cites W2150987833 @default.
- W2034856095 cites W2152044154 @default.
- W2034856095 cites W2158057679 @default.
- W2034856095 cites W2158232230 @default.
- W2034856095 cites W2171642261 @default.
- W2034856095 cites W326485191 @default.
- W2034856095 cites W4234321805 @default.
- W2034856095 doi "https://doi.org/10.1016/j.jembe.2004.12.004" @default.
- W2034856095 hasPublicationYear "2005" @default.
- W2034856095 type Work @default.
- W2034856095 sameAs 2034856095 @default.
- W2034856095 citedByCount "78" @default.
- W2034856095 countsByYear W20348560952012 @default.
- W2034856095 countsByYear W20348560952013 @default.
- W2034856095 countsByYear W20348560952014 @default.
- W2034856095 countsByYear W20348560952015 @default.
- W2034856095 countsByYear W20348560952016 @default.
- W2034856095 countsByYear W20348560952017 @default.
- W2034856095 countsByYear W20348560952018 @default.
- W2034856095 countsByYear W20348560952019 @default.
- W2034856095 countsByYear W20348560952020 @default.
- W2034856095 countsByYear W20348560952021 @default.
- W2034856095 crossrefType "journal-article" @default.
- W2034856095 hasAuthorship W2034856095A5039135345 @default.
- W2034856095 hasAuthorship W2034856095A5048514503 @default.
- W2034856095 hasConcept C104317684 @default.
- W2034856095 hasConcept C134018914 @default.
- W2034856095 hasConcept C18206936 @default.
- W2034856095 hasConcept C18903297 @default.
- W2034856095 hasConcept C2777235683 @default.
- W2034856095 hasConcept C2777744765 @default.
- W2034856095 hasConcept C2778330419 @default.
- W2034856095 hasConcept C2781174647 @default.
- W2034856095 hasConcept C2781305811 @default.
- W2034856095 hasConcept C35195898 @default.
- W2034856095 hasConcept C523546767 @default.
- W2034856095 hasConcept C54355233 @default.
- W2034856095 hasConcept C55493867 @default.
- W2034856095 hasConcept C559758991 @default.
- W2034856095 hasConcept C59822182 @default.
- W2034856095 hasConcept C72958200 @default.
- W2034856095 hasConcept C84766238 @default.
- W2034856095 hasConcept C86803240 @default.
- W2034856095 hasConceptScore W2034856095C104317684 @default.
- W2034856095 hasConceptScore W2034856095C134018914 @default.
- W2034856095 hasConceptScore W2034856095C18206936 @default.
- W2034856095 hasConceptScore W2034856095C18903297 @default.
- W2034856095 hasConceptScore W2034856095C2777235683 @default.
- W2034856095 hasConceptScore W2034856095C2777744765 @default.
- W2034856095 hasConceptScore W2034856095C2778330419 @default.
- W2034856095 hasConceptScore W2034856095C2781174647 @default.
- W2034856095 hasConceptScore W2034856095C2781305811 @default.