Effect of Microalgae Species and Concentration on Grazing Rate and Egg Production of Copepods Calanipeda aquaedulcis Kritschagin, 1873 and Arctodiaptomus salinus (Daday, 1885)
{"title":"Effect of Microalgae Species and Concentration on Grazing Rate and Egg Production of Copepods Calanipeda aquaedulcis Kritschagin, 1873 and Arctodiaptomus salinus (Daday, 1885)","authors":"L. O. Aganesova, A. N. Khanaychenko","doi":"10.1134/s1063074024700081","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The effect of the concentration of microalgae, the haptophyte <i>Isochrysis galbana</i> and the dinophyte <i>Prorocentrum cordatum</i>, on the daily grazing rate (<i>G</i>) and daily egg production rate (<i>EPR</i>) of the brackish-water copepods <i>Arctodiaptomus salinus</i> and <i>Calanipeda aquaedulcis</i> 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>I. galbana</i> at a concentration of 170–196 μg C/mL. The maximum daily <i>EPR</i> in females of <i>C. aquaedulcis</i> (129% of the body weight in the carbon equivalent) were obtained when they fed on <i>I. galbana</i> at a concentration of 15.4 μg C/mL or on <i>P. cordatum</i> at 4 µg C/mL. The maximum <i>EPR</i> values in <i>A. salinus</i> females were 34% of their weight in the carbon equivalent when feeding on <i>P. cordatum</i> at a concentration of 26 μg C/mL, and 45% in their carbon equivalent at 8.9 μg C/mL of <i>I. galbana</i>. The further increase in the microalgae concentration leads to a decrease in the <i>EPR</i> values. The efficiency of ingested food utilization for egg production in the carbon equivalent (gross growth efficiency, <i>GGE</i>, %) of <i>C. aquaedulcis</i> was significantly higher than that of <i>A. salinus</i>, regardless of the species and concentration of microalgae.</p>","PeriodicalId":49584,"journal":{"name":"Russian Journal of Marine Biology","volume":null,"pages":null},"PeriodicalIF":0.5000,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Marine Biology","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1134/s1063074024700081","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MARINE & FRESHWATER BIOLOGY","Score":null,"Total":0}
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Abstract
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 μg 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 μg C/mL or on P. cordatum at 4 µg 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 μg C/mL, and 45% in their carbon equivalent at 8.9 μg 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.
期刊介绍：
The Russian Journal of Marine Biology was founded in 1975 by Alexey V. Zhirmunsky, member of the Russian Academy of Sciences. The Russian Journal of Marine Biology covers a wide range of research and some applied aspects of marine biology as a synthetic science related to various fields of study on marine biota and environment. It presents fundamental research on biological processes at molecular, cellular, organismal, and populational levels in marine organisms. Consideration is given to marine objects as models in life sciences. The journal also publishes papers dedicated to events in Russian and international marine biological science and the history of biology.
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