|Serotonin metabolism in the brain of wild and captive, Chaetodipterus faber (Pisces: Ephippidae)|
Cardillo, E.; Gago, N.; Guerrero, H.Y.; Marcano, D. (2000). Serotonin metabolism in the brain of wild and captive, Chaetodipterus faber (Pisces: Ephippidae), in: Norberg, B. et al. (Ed.) Proceedings of the 6th International Symposium on the Reproductive Physiology of Fish, Bergen, Norway, July 4-9, 1999. pp. 64
In: Norberg, B. et al. (Ed.) (2000). Proceedings of the 6th International Symposium on the Reproductive Physiology of Fish, Bergen, Norway, July 4-9, 1999. Department of Fisheries and Marine Biology, University of Bergen: Bergen. ISBN 82-7461-048-2. 499 pp., more
In: International Symposium on the Reproductive Physiology of Fish. Museo Nacional de Ciencias Naturales, more
|Authors|| || Top |
- Cardillo, E.
- Gago, N.
- Guerrero, H.Y.
- Marcano, D.
It is well known that some teleosts do no spawn when held under captive conditions. Nevertheless, no information exists on the possible mechanism involved in the inhibition of reproduction in captive fish. Chaetodipterus faber is a marine teleost found over a wide area of the Northeast coast of Venezuela. Some aspects of its reproductive physiology are known. In this study, we have evaluated the metabolism of serotonin (5HT) in the brain of three populations of adult Ch. faber: (1) wild, fishes caught in their natural habitat and sacrificed the day after capture; (2) cultured, fishes were growth under farm conditions; (3) captives, fishes were caught in the natural habitat and left during four months in captivity. Levels of 5HT and 5-hydroxyindoleacetic acid (5HIAA) were measured by HPLC-ED. The metabolite:amine ratio was used as index of serotonin activity. Animals were sacrificed by decapitation, brains were dissected and five regions were separated: Hypothalamus (H), olfactory bulbs (OB), telencephalon (T) and optic tectum (OT). Data were analysed with unpaired Student's t-test. Differences with p less than or equal to 0,05 were considered significant