Physostomous - definition of physostomous by The Free Dictionary
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(Zoology) (of fishes) having a duct connecting the air bladder to part of the alimentary canal. Compare physoclistous
[C19: from Greek phusa bladder + -stomous, from stoma mouth]
References in periodicals archive
Sardine and anchovy are physostomous
, possessing a swim bladder with a pneumatic duct to the stomach and an anal duct to the cloaca (Whitehead and Blaxter, 1989).
swim bladder allows these species to release expanding gas pressure through a pneumatic duct, which connects the swim bladder and the food canal.
parasitize fish that are physostomous
not physoclistous (walleye are physoclistous).
The presence of a physostomous
swim bladder, the bony shield of the head and high fat deposition provided the fish the opportunity to explore the bottom habitat despite higher pressure (Willoughby 1976).