Population Structure of the Eastern Prawn, Macrobrachium nipponense (Crustacea, Decapoda, Palaemonidae), in the First Years of its Introduction into the Kiliya Delta of the Danube
The population structure, growth, and relative condition factor of the eastern prawn, Macrobrachium nipponense (De Haan, 1849), in the first years of its introduction into the Kiliya Delta of the Danube were studied. The quantitative predominance of males over females (♀ : ♂&nb...
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oai:ojs.akademperiodyka.org.ua:article-6932025-06-27T09:02:55Z Population Structure of the Eastern Prawn, Macrobrachium nipponense (Crustacea, Decapoda, Palaemonidae), in the First Years of its Introduction into the Kiliya Delta of the Danube Zorina-Sakharova, K. Ye. Hoshka, K. I. Lіashenko, A. V. Lіashenko, V. A. invasive crustaceans sex structure morphometric analysis prawn growth relative condition factor The population structure, growth, and relative condition factor of the eastern prawn, Macrobrachium nipponense (De Haan, 1849), in the first years of its introduction into the Kiliya Delta of the Danube were studied. The quantitative predominance of males over females (♀ : ♂ = 1.0 : 2.5) was established, with egg-bearing females comprising 10.0 % of the total prawn population. PCA results indicate that TL and AL are the primary differences separating females from most males, while egg-bearing and non-egg-bearing females differ in most morphometric parameters, with the key traits being RChL, LChL, and 1AbH. LDA results showed that males, egg-bearing and non-egg-bearing females differed significantly in the population based on the studied characteristics. The growth coefficients indicated a positive allometric growth type for males (b = 3.62) and near-isometric growth for females (b = 3.09). For 65.4 of females and 57.8 % of males, the values of the condition factor Kn > 1, indicating high fatness in individuals of both sexes. Publishing House "Akademperiodyka" of the National Academy of Sciences of Ukraine 2025-05-20 Article Article application/pdf https://ojs.akademperiodyka.org.ua/index.php/Zoodiversity/article/view/693 10.15407/zoo2025.03.217 Zoodiversity; Vol. 59 No. 3 (2025): Zoodiversity Zoodiversity (Vestnik Zoologii); Том 59 № 3 (2025): Zoodiversity 2707-7268 2707-725X 10.15407/zoo2025.03 en https://ojs.akademperiodyka.org.ua/index.php/Zoodiversity/article/view/693/323 Copyright (c) 2025 Kateryna Zorina-Sakharova |
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Zoodiversity |
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| datestamp_date |
2025-06-27T09:02:55Z |
| collection |
OJS |
| language |
English |
| topic_facet |
invasive crustaceans sex structure morphometric analysis prawn growth relative condition factor |
| format |
Article |
| author |
Zorina-Sakharova, K. Ye. Hoshka, K. I. Lіashenko, A. V. Lіashenko, V. A. |
| spellingShingle |
Zorina-Sakharova, K. Ye. Hoshka, K. I. Lіashenko, A. V. Lіashenko, V. A. Population Structure of the Eastern Prawn, Macrobrachium nipponense (Crustacea, Decapoda, Palaemonidae), in the First Years of its Introduction into the Kiliya Delta of the Danube |
| author_facet |
Zorina-Sakharova, K. Ye. Hoshka, K. I. Lіashenko, A. V. Lіashenko, V. A. |
| author_sort |
Zorina-Sakharova, K. Ye. |
| title |
Population Structure of the Eastern Prawn, Macrobrachium nipponense (Crustacea, Decapoda, Palaemonidae), in the First Years of its Introduction into the Kiliya Delta of the Danube |
| title_short |
Population Structure of the Eastern Prawn, Macrobrachium nipponense (Crustacea, Decapoda, Palaemonidae), in the First Years of its Introduction into the Kiliya Delta of the Danube |
| title_full |
Population Structure of the Eastern Prawn, Macrobrachium nipponense (Crustacea, Decapoda, Palaemonidae), in the First Years of its Introduction into the Kiliya Delta of the Danube |
| title_fullStr |
Population Structure of the Eastern Prawn, Macrobrachium nipponense (Crustacea, Decapoda, Palaemonidae), in the First Years of its Introduction into the Kiliya Delta of the Danube |
| title_full_unstemmed |
Population Structure of the Eastern Prawn, Macrobrachium nipponense (Crustacea, Decapoda, Palaemonidae), in the First Years of its Introduction into the Kiliya Delta of the Danube |
| title_sort |
population structure of the eastern prawn, macrobrachium nipponense (crustacea, decapoda, palaemonidae), in the first years of its introduction into the kiliya delta of the danube |
| description |
The population structure, growth, and relative condition factor of the eastern prawn, Macrobrachium nipponense (De Haan, 1849), in the first years of its introduction into the Kiliya Delta of the Danube were studied. The quantitative predominance of males over females (♀ : ♂ = 1.0 : 2.5) was established, with egg-bearing females comprising 10.0 % of the total prawn population. PCA results indicate that TL and AL are the primary differences separating females from most males, while egg-bearing and non-egg-bearing females differ in most morphometric parameters, with the key traits being RChL, LChL, and 1AbH. LDA results showed that males, egg-bearing and non-egg-bearing females differed significantly in the population based on the studied characteristics. The growth coefficients indicated a positive allometric growth type for males (b = 3.62) and near-isometric growth for females (b = 3.09). For 65.4 of females and 57.8 % of males, the values of the condition factor Kn > 1, indicating high fatness in individuals of both sexes. |
| publisher |
Publishing House "Akademperiodyka" of the National Academy of Sciences of Ukraine |
| publishDate |
2025 |
| url |
https://ojs.akademperiodyka.org.ua/index.php/Zoodiversity/article/view/693 |
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