Aganesova, L.O. & A.N. Khanaychenko. (2024). Effect of Microalgae Species and Concentration on Grazing Rate and Egg Production of Copepods Calanipeda aquaedulcis Kritschagin, 1873 and Arctodiaptomus salinus (Daday, 1885). Russian Journal Of Marine Biology. 50(3):146-155. Jun 2024.
Effect of Microalgae Species and Concentration on Grazing Rate and Egg Production of Copepods Calanipeda aquaedulcis Kritschagin, 1873 and Arctodiaptomus salinus (Daday, 1885).
Russian Journal Of Marine Biology
50(3):146-155. Jun 2024
Publication
The effect of the concentration of microalgae, the haptophyte Isochrysis galbana and the dinophyte Prorocentrum cordatum, on the daily grazing rate (G) and daily egg production rate (EPR) of the brackish-water copepods Arctodiaptomus salinus and Calanipeda aquaedulcis was studied under experimental conditions. The daily grazing rates of the copepods increased logarithmically with increasing microalgae concentration. The maximum grazing rates in both species are observed when feeding on I. galbana at a concentration of 170-196 mu g C/mL. The maximum daily EPR in females of C. aquaedulcis (129% of the body weight in the carbon equivalent) were obtained when they fed on I. galbana at a concentration of 15.4 mu g C/mL or on P. cordatum at 4 mu g C/mL. The maximum EPR values in A. salinus females were 34% of their weight in the carbon equivalent when feeding on P. cordatum at a concentration of 26 mu g C/mL, and 45% in their carbon equivalent at 8.9 mu g C/mL of I. galbana. The further increase in the microalgae concentration leads to a decrease in the EPR values. The efficiency of ingested food utilization for egg production in the carbon equivalent (gross growth efficiency, GGE, %) of C. aquaedulcis was significantly higher than that of A. salinus, regardless of the species and concentration of microalgae.
