Journal of APPLIED BIOMEDICINE
ISSN 1214-0287 (on-line)
ISSN 1214-021X (printed)

Volume 6 (2008), No 2, p 73-79




Locomotor activity and serum tryptophan and serotonin in goats: daily rhythm

Giuseppe Piccione, Claudia Giannetto, Anna Assenza, Francesco Fazio, Giovanni Caola

Address: Giuseppe Piccione, Laboratorio di Cronofisiologia Veterinaria, Facolta di Medicina Veterinaria, Universita di Messina, Polo Universitario dell’Annunziata, 98168 Messina - Italy.
giuseppe.piccione@unime.it

Received 20th February 2008.
Revised 27th February 2008.
Published online 22nd April 2008.

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SUMMARY
The goal of the present study was to investigate the daily amount of motor activity and the daily rhythm of tryptophan and serotonin in goats housed in individual boxes under a 12/12 light/dark cycle. We equipped six Girgentana breed goats with Actiwatch-Mini (Cambridge Neurotechnology Ltd, UK), actigraphy-based data loggers that record a digitally integrated measure of motor activity. Also blood samples were collected at four-hour intervals over a 48 h period via an intravenous cannula inserted into the jugular vein. The concentration of tryptophan (TRP) and serotonin (5-HT) were assessed by the high-performance liquid chromatography (HPLC) method. Our results outline a diurnal pattern of motor activity and levels of tryptophan in the serum, and a nocturnal pattern of levels of serotonin in the serum, which underline the impact of endogenous serotoninergic activity on the behavioural aspects of the circadian response to light.

KEY WORDS
motor activity; tryptophan; serotonin; daily rhythm; Capra hircus

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CITED

Piccione G, Giannetto C, Marafioti S, Casella S, Assenza A, Fazio F. Effect of different farming management on daily total locomotor activity in sheep. J Veter Behav Clin Appl Res. 6: 243-247, 2011.

Piccione G, Giannetto C, Marafioti S, Casella S, Caola G. Comparison between circadian motor activity in pony and horse. Rev Chilena Hist Nat. 84: 263-268, 2011.

Piccione G, Giannetto C, Marafioti S, Casella S, Fazio F, Caola G. Daily rhythms of rectal temperature and total locomotor activity in trained and untrained horses. J Vet Behav-Clin Applicat Res. 6: 115-120, 2011.

Piccione G, Giannetto C, Casella S, Marafioti S, Messina V, Assenza A, Faggio C, Fazio F. Nycthemeral rhythms of total locomotor activity and oxidative markers in horse. J Appl Biomed. 9: 43-48, 2011.

Piccione G, Giannetto C, Casella S, Caola G. Daily locomotor activity in five domestic animals. Anim Biol. 60: 15-24, 2010.

Giannetto C, Casella S, Caola G, Piccione G. Photic and non-photic entrainment on daily rhythm of locomotor activity in goats. Anim Sci J. 81: 122-128, 2010.

Giannetto C, Piccione G. Daily rhythms of 25 physiological variables in Bos taurus, maintained under natural conditions. J Appl Biomed. 7: 55-61, 2009.

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