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БІОМАСА Й ХИЖАЦТВО МЕДУЗИ AURELIA AURITA L. У ЧОРНОМУ МОРІ В ЖОВТНІ 2010 РОКУ

БІОМАСА Й ХИЖАЦТВО МЕДУЗИ AURELIA AURITA L. У ЧОРНОМУ МОРІ В ЖОВТНІ 2010 РОКУ

Investigations of food spectrum and daily ration of the jellyfish, Aurelia aurita l., in the Northwestern Black See in October 2010 were carried out. Unicellular algae (32%), copepods (24%) and chaetognaths (20%) prevailed in biomass in the jellyfish diet in the shelf areas, while copepods exclusive...

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Bibliographic Details
Main Authors: Аннінський, Б. Є., Дацик, Н. О.
Format: Article
Language:Ukrainian
Published: Marine Ecological Journal 2023
Subjects:
медуза Аurelia aurita
біомаса
харчовий спектр
раціон
виїдання зоопланктону
Чорне море
Online Access:https://mej.od.ua/index.php/mej/article/view/171
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Summary:Investigations of food spectrum and daily ration of the jellyfish, Aurelia aurita l., in the Northwestern Black See in October 2010 were carried out. Unicellular algae (32%), copepods (24%) and chaetognaths (20%) prevailed in biomass in the jellyfish diet in the shelf areas, while copepods exclusively (77 %) were dominating in the open see. Daily ration of medusa population with a biomass 80 – 220 g m-2 could achieve in autumn 19 – 27 mg m-2, or 0.8 – 2.7 % in energy values versus body energy content. The rate of zooplankton eating out was insufficient to compensate metabolic demands of this species (4 – 6 % day-1 – by the energy equivalent). Eating daily up to 4% of mesoplankton production, this species weakly influenced planktonic community of the sea during the autumn period when the observations were conducted.

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