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Observations on the White Sea hydroid, Sarsia producta (Wright, 1858) (Hydrozoa, Athecata)
Orlov, D. (1996). Observations on the White Sea hydroid, Sarsia producta (Wright, 1858) (Hydrozoa, Athecata). Sarsia 81: 329-338
In: Sarsia. University of Bergen. Universitetsforlaget: Bergen. ISSN 0036-4827, more
Peer reviewed article  

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Keyword
    Marine

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  • Orlov, D.

Abstract
    Polyps of the White Sea hydroid Sarsia producta were collected, described and figured, in order to gain new insight into its ecology, morphology, colonial structure, and behaviour. Specific modes of feeding behaviour were observed on hydroids in situ, and their diet was examined. The diet of Sarsia producta is diverse and based on a wide range of items from different systems: dead organic matter, settled on the substrate or suspended in the water, phytoplankton and zooplankton, and epibenthic animals and algae. Successful capture of such a variety of food items is achieved by the particular feeding movements of the flexible body, well coordinated with the movements of hypostome and capitate tentacles. In total, these movements create a complicated feeding behaviour unusual among hydroids.

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