swim bladder


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air blad·der

a gas-filled sac that is present in most fish and functions as a hydrostatic organ; it is located beneath the vertebral column primarily in the anterior abdomen and is connected with the esophagus in some species (for example, goldfish). Oxygen is transferred from a rich venous sinus into the swim bladder to increase buoyancy.
Synonym(s): swim bladder

swim bladder

n.
A gas-filled structure in many fishes that functions to maintain buoyancy and, in some species, to aid in respiration or to produce sound. Also called air bladder, gas bladder.

swim bladder

see AIR BLADDER.
References in periodicals archive ?
The origin and evolution of the surfactant system in fish: insights into the evolution of lungs and swim bladders.
Histological study of fresh swim bladder revealed several layers (Fig.
Structure of an air-breathing organ and the swim bladder in the Alaska Blackfish, Dallia pectoralis Bean.
In order to determine the effects of the addition of probiotic bacteria on the inflammatory and hematological response in Nile tilapia, fish were fed diets containing Lactobacillus plantarum isolated from tilapia after carrageenin or saline injection in the swim bladder.
Another danger to the American and European eel is an Asian parasite introduced through aquaculture that invades the eel's swim bladder and affects its migration.
Along time ago, an inquisitive drinker was experimenting with sturgeon swim bladder and said to himself, "I wonder what this would do to my alcoholic beverage.
The swim bladder is like a small balloon that the fish can fill with oxygen from its gills.
If IDers do make this prediction, Kaufmann argues that it has already been refuted by the fish swim bladder, which developed into lungs with a radically different function.
That would be a problem for most fish, since many of them have a gas-filled organ called a swim bladder that helps them stabilize their bodies at different water depths.
According to the Vegetarian Society, the swim bladder of tropical fish, referred to by those in the know as isinglass, is regularly used to clarify wine.
Topics include the diverse sound-generating mechanisms in fishes, evolutionary trends in swim bladder sound mechanisms, propagation of fish sounds, agonistic behavior and acoustic communication, reproductive behavior and acoustic interactions, detection, hydromechanical communication, olfactory systems, and public chemical information in anti-predator behavior.