Infauna


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Related to Infauna: Epifauna, Epifaunal

infauna

[in′fȯn·ə]
(zoology)
Aquatic animals which live in the bottom sediment of a body of water.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Infauna

 

animals dwelling in bottom sediments of seas, rivers, lakes, and ponds. They include many mollusks, echinoderms, segmented and round worms, insect larvae, some fishes, stone borers (some sponges, mollusks, sea urchins), and wood borers (the mollusk Teredo, some crustaceans). Infauna is categorized by the type of sediment in which it dwells: pelophilic (in ooze), psammophilic (in sand), lithophilic (in stones), and argillophilic (in clay). Most species of infauna feed on detritus. Certain forms of infauna carry out daily and seasonal vertical migrations. Infauna is important as a source of food for fishes that feed on bottom-dwelling animals (benthos).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Para evaluar la presencia, distribucion espacial y composicion de especies de la infauna pequena en una costa de manglar, se tomaron muestras con barrenos a lo largo de un transecto en la bahia Missionary, isla Hinchinbrook, noreste de Australia.
Robles, <<Modificaciones producidas durante "El Nino" en la infauna bentonica de areas someras del ecosisitema de afloramiento peruano>>, In: Arntz, W., Landa, A.
Non bioturbated laminated black shale indicate that oxygen levels beneath and just above the sediment-water interface were too low to support a burrowing infauna. Episodic winnowing is documented by skeletal accumulations of thin-shelled bivalves (Bositra sp.).
Aure, "The response of hyperbenthos and infauna to hypoxia in fjords alongthe Skagerrak: estimating loss of biodiversity due to eutrophication," in Integrated Coastal Zone Management, E.
Abundance and seasonality of infauna and epifauna inhabiting a Halodule wrightii meadow in Apalachicola Bay, Florida.
and Vinex, M., 1996, "Resource competition between macrobenthic epifauna and infauna in a Kenyan Avicenia marina mangrove forest," Marine Ecology Progress Series, 136, 123-135.
Additional studies on the infauna of seagrass and sandy bottoms should significantly increase molluscan diversity in the reef system of Maracajau, given that this group is characteristic of unconsolidated sea bottoms (Jones et al., 1990; Zuschin and Honegger, 1998).
Densities of zooplankton and infauna, two important food resources for postlarvae and small juveniles, were higher at the oligohaline upper sites of MIM (e.g., annual mean density of organisms from a drop sampler at sites 1-4 averaged 549.7 [m.sup.-2] compared to 379.5 [m.sup.-2] in samples from more saline lower sites 5 and 6; Akin 2001).
The use of infauna by juvenile Penaeus aztecus Ives and Penaeus setiferus (Linnaeus).