The distribution of neurons and fibres containing monoamines (MA, that is noradrenaline, dopamine, and serotonin) was studied in the brain of the weakly electric fish, Eigenmannia lineata, by formaldehyde-induced fluorescence histochemistry. Control experiments using a catecholamine-precursor (Dopa), a MA-depleting (reserpine), and a MA-accumulating (nialamide) drug, together with microspectrof...

.................................................................................................................................... xii Chapter I: INTRODUCTION ...................................................................................................... 1 Background and Significance ................................................................................................. 1 Met...

Monoamines and neuropeptides interact to modulate behavioral plasticity in both vertebrates and invertebrates. In Caenorhabditis elegans behavioral state or "mood" is dependent on food availability and is translated by both monoaminergic and peptidergic signaling in the fine-tuning of most behaviors. In the present study, we have examined the interaction of monoamines and peptides on C. elegans...

Domesticated chicks are precocial and therefore have relatively well-developed feeding behavior. The role of hypothalamic neuropeptides in food-intake regulation in chicks has been reported for decades. However, we hypothesized that nutrients and their metabolites in the brain may be involved in food intake in chicks because these animals exhibit a very frequent feeding pattern. Therefore, the ...

Among the many responses to GH administration is suppression of voluntary feed intake (FI) in some species, attributed to improvement in the efficiency of nutrient utilization and, therefore, reduced need for ingested substrates. Commercial broiler chickens have been genetically selected for generations for rapid growth, realized largely via the major correlated response of increased voluntary ...