Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2021 Apr 21;11(5):1188.
doi: 10.3390/ani11051188.

Population Dynamics, Fecundity and Fatty Acid Composition of Oithona nana (Cyclopoida, Copepoda), Fed on Different Diets

Fawzy I Magouz  1 , Mohamed A Essa  2 , Mustafa Matter  2 , Abdallah Tageldein Mansour  3   4 , Mohamed Alkafafy  5 , Mohamed Ashour  2
Affiliations

Population Dynamics, Fecundity and Fatty Acid Composition of Oithona nana (Cyclopoida, Copepoda), Fed on Different Diets

Fawzy I Magouz et al. Animals (Basel). .

Abstract

The marine copepod species Oithona nana is considered as one of the most successfully mass cultured Cyclopoida species in marine hatcheries. This study investigated the effects of four feed diets (soybean, yeast, rice bran, and corn starch) on the population growth, growth rate, population composition, fecundity, and fatty acid composition of native isolated Cyclopoida copepod species O. nana. The experiment was continued for 15 days and the copepods were fed on one of the four diets with a concentration of 1 g 10-6 individual day-1. The results revealed that corn starch was found to be the most supportive diet for population growth and population growth rate. For nutritional value, copepods fed on rice bran were detected to have the highest content of MUFA, PUFA, and the lowest SFA and SFA/UFA ratio; more importantly, the rice bran diet was the only treatment that showed C20:5ω3. Moreover, copepods fed on rice bran showed the highest significant female fecundity, copepodite, and nauplii percent. Finally, the protocols described in the current study concluded that the dry feeds, especially corn starch, are very useful and applicable in hatcheries for maximizing the fecundity and density of Cyclopoida copepod species, O. nana.

Keywords: Oithona nana; artificial diets; fatty acid profile; larvae rearing; live feeds.

PubMed Disclaimer

Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Isolated adult Copepoda, Cyclopoida: Oithona nana: (A) male; and (B) female.
Figure 2
Figure 2
Effect of different diets on the population growth (individual L−1) of Cyclopoida copepod, Oithona nana. Data are presented as the mean ± standard errors. The letters (a, b, and c) above each bar indicate the significant differences (p ≤ 0.05) between different diets at the same day.
Figure 3
Figure 3
Effect of different diets on the population growth rate (r) of Cyclopoida copepods, Oithona nana. Data are presented as mean ± standard errors. The letters (a, ab, b, and c) above each bar indicate the significant differences (p ≤ 0.05) among different diets on the same day.
Figure 4
Figure 4
Effect of different diets on mean percentages of population compositions of Oithona nana. Data are presented as mean ± standard errors. The letters (a, b, and c) above each bar indicate the significant differences (p ≤ 0.05) between the developmental stages (adult males, adult females, nauplii, and copepodites) among the different diets.
Figure 5
Figure 5
Effect of different diets on fecundity of Oithona nana. Data are presented as mean ± standard errors. The letters (a, b, and c) above each bar indicate the significant differences (p ≤ 0.05) among the different diets.
See this image and copyright information in PMC

References

    1. Khairy H.M., El-Sayed H.S. Effect of enriched Brachionus plicatilis and Artemia salina nauplii by microalga Tetraselmis chuii (Bütcher) grown on four different culture media on the growth and survival of Sparus aurata larvae. Afr. J. Biotechnol. 2012;11:399–415.
    1. Abdel-Rahman S., Abdel Razek F., AbouZeid A., Ashour M. Population growth rate, fecundity, filtration and ingestion rate of marine rotifer Brachionus plicatilis fed with motile and immotile microalgae. Egypt. J. Aquat. Res. 2008;34:426–439.
    1. Abdel-Rahman H., Abdel Razek A., AbouZeid A., Ashour M. Optimum growth conditions of three isolated diatoms species Skeletonema costatum, Chaetoceros calcitrans and Detonula confervacea and their utilization as feed for marine penaeid shrimp larvae. Egypt. J. Aquat. Res. 2010;36:161–183.
    1. Drillet G., Frouël S., Sichlau M.H., Jepsen P.M., Højgaard J.K., Joarder A.K., Hansen B.W. Status and recommendations on marine copepod cultivation for use as live feed. Aquaculture. 2011;315:155–166. doi: 10.1016/j.aquaculture.2011.02.027. - DOI
    1. Sharawy Z.Z., Ashour M., Abbas E., Ashry O., Helal M., Nazmi H., Kelany M., Kamel A., Hassaan M., Rossi Jr W. Effects of dietary marine microalgae, Tetraselmis suecica, on production, gene expression, protein markers and bacterial count of Pacific white shrimp Litopenaeus vannamei. Aquac. Res. 2020;51:2216–2228. doi: 10.1111/are.14566. - DOI

LinkOut - more resources