scholarly journals Olfactory sensitivity to bile fluid and bile salts in the European eel (Anguilla anguilla), goldfish (Carassius auratus) and Mozambique tilapia (Oreochromis mossambicus) suggests a `broad range' sensitivity not confined to those produced by conspecifics alone

2009 ◽  
Vol 213 (2) ◽  
pp. 308-317 ◽  
Author(s):  
M. Huertas ◽  
L. Hagey ◽  
A. F. Hofmann ◽  
J. Cerda ◽  
A. V. M. Canario ◽  
...  
Keyword(s):  
Bile Salts ◽  
Carassius Auratus ◽  
Anguilla Anguilla ◽  
Oreochromis Mossambicus ◽  
European Eel ◽  
Olfactory Sensitivity ◽  
Mozambique Tilapia ◽  
Goldfish Carassius Auratus ◽  
Bile Fluid

Olfactory sensitivity to conspecific bile fluid and skin mucus in the European eel Anguilla anguilla (L.)

2007 ◽  
Vol 70 (6) ◽  
pp. 1907-1920 ◽  
Author(s):  
M. Huertas ◽  
P. C. Hubbard ◽  
A. V. M. Canário ◽  
J. Cerdà
Keyword(s):  
Anguilla Anguilla ◽  
European Eel ◽  
Olfactory Sensitivity ◽  
Skin Mucus ◽  
Bile Fluid

Olfactory sensitivity to amino acids in the juvenile stages of the European eel Anguilla anguilla (L.)

1992 ◽  
Vol 40 (4) ◽  
pp. 567-576 ◽  
Author(s):  
R. Crnjar ◽  
G. Slcalera ◽  
A. Bigiani ◽  
I. Tomassini Barbarossa ◽  
P. C. Magherini ◽  
...  
Keyword(s):  
Amino Acids ◽  
Anguilla Anguilla ◽  
European Eel ◽  
Olfactory Sensitivity ◽  
Juvenile Stages

scholarly journals Olfactory sensitivity to changes in environmental [Ca2+] in the freshwater teleost Carassius auratus: an olfactory role for the Ca2+-sensing receptor?

2002 ◽  
Vol 205 (18) ◽  
pp. 2755-2764 ◽  
Author(s):  
P. C. Hubbard ◽  
P. M. Ingleton ◽  
L. A. Bendell ◽  
E. N. Barata ◽  
A. V. M. Canário
Keyword(s):  
Olfactory System ◽  
Carassius Auratus ◽  
Sea Water ◽  
Sparus Aurata ◽  
In Situ Hybridisation ◽  
Extracellular Recording ◽  
Hill Coefficient ◽  
Olfactory Sensitivity ◽  
Goldfish Carassius Auratus

SUMMARY Olfactory sensitivity to changes in environmental Ca2+ has been demonstrated in two teleost species; a salmonid (Oncorhynchus nerka)and a marine/estuarine perciform (Sparus aurata). To assess whether this phenomenon is restricted to species that normally experience large fluctuations in external ion concentrations (e.g. moving from sea water to fresh water) or is present in a much wider range of species, we investigated olfactory Ca2+ sensitivity in the goldfish (Carassius auratus), which is a stenohaline, non-migratory freshwater cyprinid. Extracellular recording from the olfactory bulb in vivo by electroencephalogram (EEG) demonstrated that the olfactory system is acutely sensitive to changes in external Ca2+ within the range that this species is likely to encounter in the wild (0.05-3 mmol l-1). The olfactory system responded to increases in external calcium with increasing bulbar activity in a manner that fitted a conventional Hill plot with an apparent EC50 of 0.9±0.3 mmol l-1 (close to both ambient and plasma free [Ca2+]) and an apparent Hill coefficient of 1.1±0.3 (means ± S.E.M., N=6). Thresholds of detection were below 50 μmol l-1. Some olfactory sensitivity to changes in external [Na+] was also recorded, but with a much higher threshold of detection (3.7 mmol l-1). The olfactory system of goldfish was much less sensitive to changes in [Mg2+] and [K+]. Preliminary data suggest that Ca2+ and Mg2+ are detected by the same mechanism, although with a much higher affinity for Ca2+. Olfactory sensitivity to Na+ may warn freshwater fish that they are reaching the limit of their osmotic tolerance when in an estuarine environment. Olfaction of serine, a potent odorant in fish, was not dependent on the presence of external Ca2+ or Na+. Finally, the teleost Ca2+-sensing receptor (Ca-SR) was shown to be highly expressed in a subpopulation of olfactory receptor neurones by both immunocytochemistry and in situ hybridisation. The olfactory sensitivity to Ca2+ (and Mg2+) is therefore likely to be mediated by the Ca-SR. We suggest that olfactory Ca2+ sensitivity is a widespread phenomenon in teleosts and may have an input into the physiological mechanisms regulating internal calcium homeostasis.

Sign in / Sign up

Export Citation Format

Share Document