Lesions of Gonadotropin-Releasing Hormone-lmmunoreactive Terminal Nerve Cells: Effects on the Reproductive Behavior of Male Dwarf Gouramis
- 1 January 1997
- journal article
- research article
- Published by S. Karger AG in Neuroendocrinology
- Vol. 65 (6), 403-412
- https://doi.org/10.1159/000127203
Abstract
Functions of the terminal nerve (TN) are largely unknown. To examine whether gonadotropin-releasing hormone (GnRH)-immunoreactive TN cells (TN-GnRH cells) are involved in the control of reproductive behavior, effects of lesions of TN-GnRH cells were studied in male dwarf gouramis, Colisa Mia. After bilateral electrolytic lesion, a characteristic impairment was observed in one of the repertoires of male reproductive behavior, nest-building. The occurrence of mating trials in which males showed no nest-building was increased. However, the incidence of nest-building behavior during postoperative trials was not affected by the lesion. No impairment was observed in other reproductive repertoires. These results suggest that (1) TN-GnRH cells are involved in the control of the threshold for nest-building behavior initiation and (2) TN-GnRH cells are not a prerequisite for other aspects of reproductive behavior in the male gouramis.Keywords
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