Feeding peculiarities of deep-sea acorn worm (Hemichordata, Enteropneusta, Torquaratoridae) from the Bering sea

Ezhova, O.V.; Trukhan, M.A.; Lukinykh, A.I.; Krylova, E.M.; Galkin, S.V.; Gebruk, A.V.; Malakhov, V.V.

Авторы: Ezhova O.V., Trukhan M.A., Lukinykh A.I., Krylova E.M., Galkin S.V., Gebruk A.V., Malakhov V.V.
Журнал: Doklady Biological Sciences
Том: 500
Год издания: 2021
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
Первая страница: 149
Последняя страница: 152
DOI: 10.1134/S0012496621050033
Аннотация: Deep-sea hemichordates Torquaratoridae gen. sp. reach high abundance up to 12 spec. m–2 at the depths of 1830–2130 m on the slope of the Volcanologists Massif in the south-western part of the Bering Sea, dominating in the benthic community at these depths. Their abundance exceeds by two orders the values recorded earlier. In order to clarify this phenomenon, we examined the gut contents of Torquaratoridae gen. sp. The detritus particles and frustules of planktonic diatoms Thalassiosira, Coscinodiscus, Actinocyclus, Chaetoceros, Neodenticula, and Grammatophora were the most common in the gut, as well as the remains of skeletons of benthic invertebrates with little admixture of mineral particles. According to obtained data, Torquaratoridae gen. sp. are mobile deposit feeders with high selectivity to fresh phytodetritus, able to compete with holothurians occupying similar trophic niche. Unusually high abundance of acorn worms is apparently related to high organic matter flux to the seafloor as a result of spring phytoplankton bloom in the surfacewater layer of the Bering Sea.
Добавил в систему: Ежова Ольга Владимировна

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Feeding peculiarities of deep-sea acorn worm (Hemichordata, Enteropneusta, Torquaratoridae) from the Bering seaстатья

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