Abstract
Based on the materials of long-term (2000–2019) studies of ichthyoplankton in the adjacent areas of the northern part of the Central Eastern Atlantic (exclusive economic zones of the northern and southern parts of Morocco and Mauritania), the species diversity of the ichthyoplankton has been studied using various indices that are widespread in ecological and faunistic research. A general trend towards an increase in the species diversity from the northern part of Morocco to the area of Mauritania has been revealed (the average values of the Margalef index increase from 4.63 to 7.02). The ichthyoplankton assemblages of the study areas are characterized by a medium and high biotic diversity (Simpson’s index 0.22–0.90); different degrees of their monodominance are observed more often (in 25 of the 44 observations, Pielou’s evenness index was less than 0.5) than the relatively equal abundance of all species. In the northern part of Morocco, similar trends have been revealed in the dynamics of diversity indices and abundance indices for European pilchard Sardina pilchardus at its early development stages; in the southern part of Morocco and in Mauritania, the trends in the diversity and abundance dynamics are similar in round sardinella Sardinella aurita. In the ichthyoplankton of the study areas, the dominant species is S. pilchardus and subdominant species are S. aurita, European anchovy Engraulis encrasicolus, and sparids (Sparidae).
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Arkhipov, A.G., Kolomeiko, F.V. & Pak, R.A. Assessment of the Species Diversity of Ichthyoplankton in the Northern Part of the Central Eastern Atlantic. J. Ichthyol. 62, 421–427 (2022). https://doi.org/10.1134/S0032945222020011
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DOI: https://doi.org/10.1134/S0032945222020011