Taylor G T, Bartko G, Farr S
Horm Behav. 1987 Jun;21(2):234-44. doi: 10.1016/0018-506x(87)90048-1.
Urine deposited by a rat on a conspecific was quantified with injections of sodium fluorescein, a substance that changes the color of urine. The hypothesis examined in experiment 1 was that marking the environment and a conspecific would be similarly androgen-sensitive behaviors during each of three stages--before castration, after castration, and with restorative therapy with testosterone propionate. Findings were that castration reduced both forms of marking, and testosterone therapy to castrated males restored environmental marking in a dose-response fashion. However, the findings for social marking were more complex; for example, a physiological 200-micrograms testosterone dosage to castrated males was unable to elevate conspecific marking over the rates of marking by castrates without testosterone replacement. In experiment 2 the ontogeny conspecific marking in juvenile males was examined in relation to the pubertal surge of androgens. Results suggested that juvenile male marking of an adult male decreased despite a pubertal increase of androgens. Conclusions were that testicular hormones influenced both forms of marking but were less important in the social setting. Moreover, conspecific marking is not simply an extension of marking the environment.
通过注射荧光素钠来量化大鼠在同种个体上排泄的尿液，荧光素钠是一种能改变尿液颜色的物质。实验1检验的假设是，在阉割前、阉割后以及丙酸睾酮恢复治疗这三个阶段中的每一个阶段，标记环境和同种个体将是类似的雄激素敏感行为。结果发现，阉割会减少这两种标记形式，对阉割后的雄性大鼠进行睾酮治疗会以剂量反应方式恢复环境标记。然而，社会标记的结果更为复杂；例如，给阉割后的雄性大鼠注射200微克的生理剂量睾酮，无法使同种个体标记率超过未进行睾酮替代的阉割大鼠的标记率。在实验2中，研究了幼年雄性大鼠同种个体标记的个体发生与雄激素青春期激增的关系。结果表明，尽管雄激素在青春期有所增加，但幼年雄性大鼠对成年雄性大鼠的标记却减少了。结论是，睾丸激素影响这两种标记形式，但在社会环境中作用较小。此外，同种个体标记并非简单地是标记环境的延伸。
