ISSN:
1432-1351
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary 1. Female American toads,Bufo americanus, were tested for mating call phonotaxis (MCP) toward conspecific, electronically-generated, mating ‘calls’ after administration of 1 of 4 drug regimens. 2. Minimum phonotaxis was displayed in the group receiving only prostaglandin F2α (PG). The addition of either progesterone the day before, or of arginine vasotocin immediately before the PG injection, or of both, produced a statistically significant increase in intensity of MCP (Fig. 1). This supports the hypothesis that PG-activation of the MCP circuits is facilitated by both progesterone and arginine vasotocin. 3. It is tentatively postulated that progesterone may lower the threshold of activation of the MCP circuits by PG, and that the arginine vasotocin may facilitate the penetration of the PG through the blood brain barrier (Fig. 3). 4. A more detailed description of the less intense levels of MCP is given (Fig. 2). 5. Further improvement in a drug regimen for the routine induction of intense MCP in non-gravid females is described (Fig. 2E).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00610834
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