Fish Inner Ear Otolith Growth Under Real Microgravity (Spaceflight) and Clinorotation

2015 ◽  
Vol 28 (3) ◽  
pp. 351-356 ◽  
Author(s):  
Ralf Anken ◽  
Sonja Brungs ◽  
Dennis Grimm ◽  
Miriam Knie ◽  
Reinhard Hilbig
Keyword(s):  
Inner Ear ◽  
Otolith Growth ◽  
Real Microgravity

scholarly journals Fish ears are sensitive to sex change

2008 ◽  
Vol 5 (1) ◽  
pp. 73-76 ◽  
Author(s):  
Stefan P.W Walker ◽  
Mark I McCormick
Keyword(s):  
Life History ◽  
Inner Ear ◽  
Fisheries Management ◽  
Life History Theory ◽  
Sex Change ◽  
Reproductive Mode ◽  
Reef Fishes ◽  
Otolith Growth ◽  
History Of ◽  
Complex Life History

Many reef fishes change sex during their life. The testing of life-history theory and effective fisheries management therefore relies on our ability to detect when this fundamental transition occurs. This study experimentally illustrates the potential to glean such information from the otolithic bodies of the inner-ear apparatus in the sex-changing fish Parapercis cylindrica . It will now be possible to reconstruct the complete, often complex life history of hermaphroditic individuals from hatching through to terminal reproductive status. The validation of sex-change associated otolith growth also illustrates the potential for sex-specific sensory displacement. It is possible that sex-changing fishes alter otolith composition, and thus sensory-range specificity, to optimize life history in accordance with their new reproductive mode.

Electronmicroscopic investigations on the role of vesicle-like bodies in inner ear maculae for fish otolith growth

2000 ◽  
Vol 25 (10) ◽  
pp. 2031-2034
Author(s):  
M. Ibsch ◽  
P. Vöhringer ◽  
R.H. Anken ◽  
H. Rahmann
Keyword(s):  
Inner Ear ◽  
Otolith Growth ◽  
Fish Otolith

Otoconia formation in the chick embryo

1983 ◽  
Vol 41 ◽  
pp. 572-573
Author(s):  
C.D. Fermin ◽  
M. Igarashi
Keyword(s):  
Chick Embryo ◽  
Inner Ear ◽  
Gallus Domesticus ◽  
The Body ◽  
Abnormal Behavior ◽  
Intensive Study ◽  
Basic Fuchsin ◽  
Gestational Period ◽  
Sensory Epithelia ◽  
Transmission Electron

Otoconia are microscopic geometric structures that cover the sensory epithelia of the utricle and saccule (gravitational receptors) of mammals, and the lagena macula of birds. The importance of otoconia for maintanance of the body balance is evidenced by the abnormal behavior of species with genetic defects of otolith. Although a few reports have dealt with otoconia formation, some basic questions remain unanswered. The chick embryo is desirable for studying otoconial formation because its inner ear structures are easily accessible, and its gestational period is short (21 days of incubation).The results described here are part of an intensive study intended to examine the morphogenesis of the otoconia in the chick embryo (Gallus- domesticus) inner ear. We used chick embryos from the 4th day of incubation until hatching, and examined the specimens with light (LM) and transmission electron microscopy (TEM). The embryos were decapitated, and fixed by immersion with 3% cold glutaraldehyde. The ears and their parts were dissected out under the microscope; no decalcification was used. For LM, the ears were embedded in JB-4 plastic, cut serially at 5 micra and stained with 0.2% toluidine blue and 0.1% basic fuchsin in 25% alcohol.

Control of the Microcirculation of the Inner Ear

1975 ◽  
Vol 8 (2) ◽  
pp. 455-466 ◽  
Author(s):  
James B. Snow ◽  
Fumiro Suga
Keyword(s):  
Inner Ear
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