大仓鼠在繁殖期的行为关系及交配行为

BEHAVIORAL INTERACTIONS AND MATING BEHAVIOR OF RATLIKE HAMSTERS (CRICETULUS TRITON) DURING THE BREEDING SEASON

在Ｙ型迷宫中进行气味选择测定时，被试大仓鼠偏好异性的气味，证明身体气味有性吸引和性识别作用。在Ｙ型迷宫进行性别选择测定时，在雌雄靶鼠个体之间，被试大仓鼠不表现出性别偏好，这是攻击行为和交配行为共同影响的结果；与空白相比较，被试鼠都选择靶鼠，说明独居大仓鼠之间存在频繁的探究行为。通过观察箱内对两鼠间的行为关系的观察发现，异性之间主要有攻击行为和交配行为；同性之间主要发生攻击行为，同时胜鼠或优势鼠的胁腺标记行为显著多于从属鼠，说明胁腺标记可以表明优势地位；雄鼠与非性接受状态的雌鼠相遇时，攻击行为很少，但无友好行为，只有简单的雄鼠爬跨雌鼠的行为；任何陌生的雄鼠与性接受状态的雌鼠相遇发生交配行为，交配结束又相互攻击；交配行为表现为多次爬跨多次射精；雄鼠有库利奇（Ｃｏｏｌｉｄｇｅ）效应，雌鼠可以连续接受几只雄鼠的交配，表明大仓鼠为多配制的婚配制度。从行为关系和交配行为看大仓鼠在繁殖期独居。

In a Y-maze, the focal female ratlike hamster s( Cricetulus triton ) preferred body odor of males to females or control ( P <0 05); the male did not show a se xual preference for body odor( P >0 05),while preferred body odor of conspeci fic t o control, these results indicated that body odor are attractive to the hamster, and the hamsters response to the odor had sexual difference The focal hamster spent more time in one of arms of Y-maze with hamster demo n strator than another control arm( P <0 05 or P <0 01); males spent more t ime in one of arms with same sex hamster demonstrator than another with the opposite sex i ndividual conspecific ( P <0 01), and females did not spend different time ( P >0 0 5) The results were mediated by combination of agonistic behavior and mating patterns The staged dyadic encounters were conducted in a neutral arena Paired encou n ters between both same sexes contained frequent agonistic acts and few amiable a cts, and the victors had more attack and flank gland marking( P <0 05 or P <0 01); although both males and females exhibited less aggression when paired with oppos ite sex conspecific, amiable acts were also fewer,and females received males' m ounting only on the estrus day of estrous cycle and attacked males on other days of The above results implied that the hamster was solitary and that flank gl a nd marking was positively related to agonistic behavior and dominant status Ra t like hamsters had a typical mating behavior and exhibit multiple intromission fo llowed by multiple ejaculations Both males' Coolidge effect and females' multip le matings indicated that the hamster was polygynous or promiscuous mating