Production characteristics of the copepods Arctodiaptomus salinus and Calanipeda aquaedulcis fed with a mixture of microalgae Dinophyceae and Prymnesiophyceae

Main Article Content

L. O. Aganesova

researcher, PhD

http://orcid.org/0000-0003-4052-7985

https://elibrary.ru/author_items.asp?id=822967

Abstract

The ubiquitous copepod species Arctodiaptomus salinus (Daday, 1885) and Calanipeda aquaedulcis (Krichagin, 1873) are important components of food chains of numerous fresh- and saltwater areas. These copepods are suitable for feeding larvae of both marine and freshwater fish species; however, influence of nutrition on the production characteristics of these species is not well understood. Previously we determined that monocultures of microalgae Dinophyceae and Prymnesiophyceae are optimal feeding objects for egg production by females of A. salinus and C. aquaedulcis, survival rate, and development time of these copepods throughout ontogenesis. The aim of this work was to determine the production characteristics of copepods A. salinus and C. aquaedulcis under optimal temperature conditions depending on the model of the feeding with a mixture of microalgae Dinophyceae and Prymnesiophyceae. The highest survival rates of A. salinus from the naupliar stage to the adult one (93–95 %) were observed when copepods were fed with a monoculture of microalga Isochrysis galbana (Parke, 1949) or a mixture I. galbana + Prorocentrum cordatum (Ostenfeld) J. D. Dodge, 1975; the shortest development time (19 days) – when copepods were fed with a mixture of three microalgae I. galbana + P. cordatum + Prorocentrum micans (Ehrenberg, 1834). The shortest development time of C. aquaedulcis from the naupliar stage to the adult one (13 days) was observed when copepods were fed with a mixture of microalgae I. galbana + P. cordatum. The shortest duration of the naupliar stage of development of both copepod species was observed when their diet included I. galbana as a monoculture or one of mixture components. During the copepodit stage, the pattern remains the same, only with P. cordatum. The maximum absolute fecundity of C. aquaedulcis reached 24 eggs per female (I. galbana), of A. salinus – 16 eggs per female (P. cordatum). Egg hatching of C. aquaedulcis when being fed with both monocultures of microalgae P. cordatum and I. galbana and with their mixture reached 100 %. The highest egg hatching rate for A. salinus was reached only when copepod females were fed with a mixture of microalgae I. galbana + P. micans.

Article Details

Aganesova L. O. Production characteristics of the copepods Arctodiaptomus salinus and Calanipeda aquaedulcis fed with a mixture of microalgae Dinophyceae and Prymnesiophyceae. Marine Biological Journal, 2020, vol. 5, no. 2, pp. 3-11. doi: 10.21072/mbj.2020.05.2.01
Keywords:
copepods, Arctodiaptomus salinus, Calanipeda aquaedulcis, survival, development, reproduction, microalgae, mixture of microalgae, Dinophyceae, Prymnesiophyceae
Section
Scientific communications

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