... sensitivity is due to exposure-dependent increases in the expression of odorant receptor (OR) proteins that are activated by specific odorants experienced during imprinting. To test this hypothesis, we exposed juvenile coho salmon, Oncorhynchus kisutch , to the basic amino acid odorant l -arginine during...

... at different temperatures (26°C, 30°C and 34°C), before being placed in nutrient-replete or -depleted seawater for 24 h. The corals were then incubated with 13 C-labelled sodium bicarbonate and different 15 N-labelled nitrogen forms (ammonium, urea and dissolved free amino acids) to determine...

... bass had higher olfactory sensitivity to amino acid odorants when delivered in seawater than in freshwater. Conversely, brackish water-adapted bass had largely similar sensitivities to the same odorants when delivered in seawater or freshwater, although sensitivity was still slightly higher in seawater...

...Mais Jubouri; Giancarlo G. M. Talarico; Jean-Michel Weber; Jan A. Mennigen ABSTRACT In rainbow trout, dietary carbohydrates are poorly metabolized compared with other macronutrients. One prevalent hypothesis suggests that high dietary amino acid levels could contribute to the poor utilization...

... concentration of several amino acids, indicating a potential dispersal–foraging trade-off. As a possible consequence of this lower food intake, dispersers also laid smaller eggs. Responses to tomato were consistent with this plant being a stressor for T . urticae , including reduced fecundity and reduced...

..., which is then reabsorbed for amino acid synthesis or reconversion to urea. * Author for correspondence ( [email protected] ) Competing interests The authors declare no competing or financial interests. 16 10 2018 3 12 2018 © 2019. Published by The Company...

... very distinct mechanical behaviours compared with the remaining species. Extensibility, strength and force were the main variables separating these species groups, which were highest for M. californianus and lowest for P. nobilis . Furthermore, the analysis of the amino acid composition revealed that I...

... to significant decreases in the activity of some ornithine–urea cycle enzymes (argininosuccinate synthetase/argininosuccinate lyase and arginase) from the liver of P. sinensis . As a decrease in urea synthesis occurred without the accumulation of ammonia and total free amino acids, it can be deduced that ammonia...

..., as indicated by reductions in the level of serum amino acids in starved fish. In contrast, starvation appears to promote protein catabolism in liver as the level of methionine, proline and lysine metabolite 2-piperidine carboxylic acid increased significantly. Also, starvation resulted in significant changes...

... with sucrose, glucose, fructose, maltose, myo-inositol and 20 common amino acids. In electrophysiological recordings from nine sensilla, responses were obtained to certain compounds tested at 100 mmol l −1 , and the response spectra differed from broad to narrow. The four sugars excited the same receptor...

..., it was non-ureotelic and non-ureoosmotic, acting mainly as an osmoconformer with its plasma osmolality, [Na + ] and [Cl − ] comparable to those of the external medium. There were significant increases in the content of several free amino acids (FAAs), including glutamate, glutamine and glycine, in muscle...

...Guojin Wu; Zandong Li SUMMARY It has been speculated that free amino acids digested from proteins in bird eggs are transported to the circulation for the nourishment of the embryo. In the present study, we found that early chicken embryo protein in the serum might be utilized efficiently...

... taurine-,glycine- and non-conjugated compounds along with three stimulatory amino acids as a comparison were investigated using extracellular electrophysiological techniques. Integrated multiunit responses were obtained from the branch of the facial nerve innervating taste buds on the maxillary barbel...

... and liver, of P. schlosseri at 3 h post-feeding. Thus,it can be concluded that P. schlosseri was capable of unloading ammonia originally present in some of its tissues in anticipation of ammonia released from the catabolism of excess amino acids after feeding. Subsequently, there were significant increases...

...[cortisol] induced by stress. However, increased dietary TRP tended to elevate basal levels of plasma cortisol in non-stressed fish. As will be discussed below, these effects of dietary TRP could both be mediated by the brain 5-HT system, TRP being the amino acid precursor of 5-HT. Still, feeding the fish...

... ammonia into urea in its liver. However, aerial exposure did not affect this capability and did not induce detoxification of the accumulated ammonia to urea. Mudskippers exposed to terrestrial conditions and constant darkness did, however, show significant decreases in the total free amino acid content...

...J. D. Rhodes; P. C. Croghan; A. F. G. Dixon ABSTRACT Ingestion, excretion and respiration in aphids were studied using artificial diets labelled with radioactive sucrose or amino acids. The rate of ingestion of a 25 % w/v sucrose diet was 12.4 nl mg –1 h –1 and the honeydew excretion rate was 5.3...

... to the investigation of most metabolic substrates, including fatty acids, glycerol, amino acids and lactate, in addition to glucose. Future application of the continuous infusion technique under steady-state as well as non-steady-state conditions will add a new dimension to the general understanding of fish metabolism...

... to amino acids, potent stimulants for fish, were altered between fresh water and sea water. The magnitudes of the responses to the six amino acids examined were similar in artificial pond water and artificial sea water, indicating that a large change in NaCl concentration between fresh and sea water does...

... 1995 ornithine–urea cycle enzymes glutamine synthetase ureogenesis amino acids feeding stress gulf toadfish Opsanus beta The vast majority of teleost fish excrete their waste nitrogen principally as ammonia (ammoniotely); however, recent studies have expanded the list...