Gustatory response in the young yellowtail Seriola quinqueradiata.

The diversity of chemical stimulation in fish olfaction and gustation

“…Cross-adaptation and differential enzyme treatments suggest that carboxylic and amino acids stimulate independent receptors. Of 24 organic acids tested, lactic acid was most stimulatory for the yellowtail, with a threshold of 10 -6 M. This matches that for LPro for this species and these organic acids share the same fibre type with L-AIa (Hidaka et al, 1992). The carp gustatory receptors are stimulated by a wide range of carboxylic acids (Marui and Caprio, 1992).…”

“…The gustatory sensitivity of fish to carboxylic acids has been studied only in a few species: Salmo salar (Sutterlin and Sutterlin, 1970), Anguilla japonica (Yoshii et al, 1979), Cyprinus carpio (Marui and Caprio, 1992), and Seriola quinqueradiata (Hidaka et al, 1992). The in vitro palatine nerve preparation of decapitated Atlantic salmon responded to several carboxylic acids only at high concentrations (10-3-10 -Z M).…”

Gustatory response in the shimaisaki (tigerfish) Therapon oxyrhynchus.

“…[1][2][3][4][5][6] We have recently attempted to record the peripheral neural responses of some species of marine teleosts. This paper describes the responses of the shimaisaki tigerfish, Therapon oxyrhynchus.…”

An Evaluation of Amino Acid Sources and Binders in Semipurified Diet for Red Sea Urchin <i>Pseudocentrotus depressus</i>

“…Certain amino acids, dipeptides and nucleotides are known to function as feed ing attractant for fish, abalone and crabs, [22][23][24][25] and a phos pholipid is known to be a feeding attractant for sea urchin.19) However, the casein hydrolysate used in this ex periment was composed only of peptides with molecular weights over 5000, and it is possible that some portion of the peptides may function as a feed attractant, although casein hydrolysate does not contain any known at tractants. If that is the case, then supplementing a small amount of casein hydrolysate into formulated diets might be useful in increasing the appetite of urchins.…”