Ear stones

(Anat.) otoliths. See Otolith.

See also: Ear

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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The inner ears of fish are similar in most ways to those of humans and other terrestrial vertebrates, with a system of connecting ducts and chambers and containing calcareous ear stones called otoliths.
The team also investigated how well they could identify a fish's origins using genetic and chemical tests--in the first case, analysing the DNA at 15 different genetic markers, and in the second, analysing the composition of fish ear stones, known as otoliths, which absorb elements from the surrounding water.
Ear stones, otoliths, are still best for aging those species.
The new study examined otoliths, or "ear stones," from nearly 200 Atlantic bluefins caught over a six-year period from both eastern and western stocks.
To get more specific information on where the tuna spend time, Jay Rooker of Texas A&M University at Galveston set out to identify the origins of fish by examining the chemicals of their otoliths, or "ear stones." Nearly 200 Atlantic bluefins, from both sides of the ocean, were tracked over a six-year period.
Fish otoliths, the aragonitic "ear stones" of the acousticolateralis sensory system, are often preserved in sediments where no other parts of the animal survive.
* Researchers used a technique called otolith microchemistry, which involved examining changes in chemical composition in the otoliths (small ear stones) along a "timeline" that represents a fish's life.
Scientists know the creature only by its distinctive otoliths, which is Greek for "ear stones." Those features develop during most stages of a fish's life and show numerous growth rings, says Scott J.