2017
DOI: 10.1163/15707563-00002537
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Trophic ecology and diet of Hydra vulgaris (Cnidaria; Hydrozoa)

Abstract: Hydra is a genus of common, sessile, solitary freshwater cnidarians, which are defined as carnivorous and efficient predators. The purpose of this study was to obtain information on the feeding habits and diet of Hydra vulgaris collected from its natural habitat in Nahuel Rucá Lake (Buenos Aires Province, Argentina). We found three categories of food items in the coelenteron: algae, fungi, and small invertebrates. Algae dominated the diet in terms of abundance and frequency of occurrence, but their volumetric … Show more

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Cited by 13 publications
(7 citation statements)
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“…Aquatic cnidarians and terrestrial insects sharing mutual parasites or viruses appears to be unlikely, given their approximately 600 million year divergence time and different habitats. Terrestrial insect larvae or imagos which fall into the water column may be preyed upon by Hydra , which are known to feed upon dipteran larvae and can engulf prey items in excess of 30mm in length [ 59 ]. As Teleopsis species, as well as members of other diopsid genera, often live over bodies of water [ 29 , 30 , 60 ] opportunistic predation may potentially allow diopsid mariner DNA to be taken up by Hydra cells resulting in horizontal transfer.…”
Section: Discussionmentioning
confidence: 99%
“…Aquatic cnidarians and terrestrial insects sharing mutual parasites or viruses appears to be unlikely, given their approximately 600 million year divergence time and different habitats. Terrestrial insect larvae or imagos which fall into the water column may be preyed upon by Hydra , which are known to feed upon dipteran larvae and can engulf prey items in excess of 30mm in length [ 59 ]. As Teleopsis species, as well as members of other diopsid genera, often live over bodies of water [ 29 , 30 , 60 ] opportunistic predation may potentially allow diopsid mariner DNA to be taken up by Hydra cells resulting in horizontal transfer.…”
Section: Discussionmentioning
confidence: 99%
“…Due to the importance of such research, many studies regarding feeding aspects in Cnidaria have been conducted [21]. For example, several studies have been carried out on feeding and trophic performances in Medusozoa (e.g., [22], [23], [24]), including freshwater species [25], due to their impacts on commercial marine and freshwater species [5].…”
Section: Discussionmentioning
confidence: 99%
“…En su papel como predadores en las comunidades bentónicas Schwartz et al (1983) señalan a los crustáceos del plancton como sus presas principales, así como a los gusanos oligoquetos. Deserti et al (2017) recogen la presencia de un amplio espectro de micro-invertebrados, hongos y microalgas en la cavidad gastrovascular de H. vulgaris. El ataque de H. oligactis sobre un oligoqueto se muestra en la Fig.…”
Section: Discussionunclassified