Seasonal dynamics of the total lipid content in the body of the European anchovy Engraulis encrasicolus (Linnaeus, 1758) in 2017–2020
Analysis of the lipid content in the body of the European anchovy (Engraulis encrasicolus) at all stages of its life cycle for the years 2017–2020 has been conducted. This article presents a comparison of the obtained data with the reference range of lipid content that had been calculated based on the results of long-term studies. It has been found that the differences in the content of constructive and energybearing substances in the body of an anchovy individual is age-specific: the lipid content in fingerlings is lower than in the individuals at the later stages of the life-cycle. Following the investigation of interseasonal dynamics of the lipid content in the body, it has been identified that the lowest lipid content was characteristic for the anchovy in April–May, and the highest lipid content was observed in October. Analysis of the inter-annual dynamics of the lipid content in the body at the end of the feeding period has shown that, in recent years, there is a trend for the gradual decline of their amount due to increasing load of environmental factors on fish population.
Main Authors: | , , , , , , , , |
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Format: | Journal Contribution biblioteca |
Language: | Russian |
Published: |
2021
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Subjects: | Engraulis encrasicolus, Anchovy physiology, Life cycle, Seasonal variations, Feeding period, Long-term studies, Size groups, Физиология хамсы, Сезонные изменения, Жизненный цикл, Размерные группы, ASFA_2015::L::Lipids, |
Online Access: | http://hdl.handle.net/1834/41848 |
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Summary: | Analysis of the lipid content in the body of the European anchovy (Engraulis encrasicolus) at all stages of its life cycle for the years 2017–2020 has been conducted. This article presents a comparison of the obtained data with the reference range of lipid content that had been calculated based on the results of long-term studies. It has been found that the differences in the content of constructive and energybearing substances in the body of an anchovy individual is age-specific: the lipid content in fingerlings is lower than in the individuals at the later stages of the life-cycle. Following the investigation of interseasonal dynamics of the lipid content in the body, it has been identified that the lowest lipid content was characteristic for the anchovy in April–May, and the highest lipid content was observed in October. Analysis of the inter-annual dynamics of the lipid content in the body at the end of the feeding period has shown that, in recent years, there is a trend for the gradual decline of their amount due to increasing load of environmental factors on fish population. |
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