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首页> 美国卫生研究院文献>other >Maternal Food Restriction During Lactation Affects Body Weightand Sexual Behavior of Male Offspring in Meadow Voles (Microtus pennsylvanicus)
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Maternal Food Restriction During Lactation Affects Body Weightand Sexual Behavior of Male Offspring in Meadow Voles (Microtus pennsylvanicus)

机译：哺乳期的母体食物限制影响草甸田鼠（田鼠）的体重和雄性后代的性行为

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Little is known about the occurrence of individual variation in sexual behavior and how maternal nutrition can affect this variation. We tested the hypothesis that male offspring of female meadow voles, Microtus pennsylvanicus, that were 30% food restricted (FR) during days 1–7 of lactation (FR 1–7), days 8–14 of lactation (FR 8–14), or late days 15–21 of lactation (FR 15–21) lactation show persistent, negative effects on their sexual behavior as adults relative to male offspring of females that were not food restricted. We measured three components of sexual behavior, attractivity, proceptivity and receptivity, beginning when the males were 98 days of age. Food restriction during middle lactation (FR 8–14) but not during early (FR 1–7) and late lactation (FR 15–21) was sufficient to induce adult male voles to produce anogenital marks that were not as attractive as those produced by control males. Food restriction during lactation did not affect the proceptive behavior of male voles but did affect their receptivity. Only 4 of 12 FR 8–14 male voles mated compared to 9 of 12 FR 1–7 males, 8 of 12 FR 15–21 males, and 8 of 11 control males. However, no differencesexisted in their copulatory behavior among the males that did mate. The bodyweight of FR 1–7 and FR 8–14 males was lower than that of FR15–21 and control males when they were between 22 days of age (weaning)and 48 days of age (puberty) but was similar when the males were 98 days of age.Food intake was similar for the FR and control males between day 22 and day 98.It remains unclear, however, if this type of maternal effect representsstrategic programming of offspring behavior in response to the environmentexperienced by mothers or is a product of developmental processes of foodrestriction prior to weaning (href="#R18" rid="R18" class=" bibr popnode tag_hotlink tag_tooltip" id="__tag_527581277">Forstmeier et al.2004).
机译：人们对性行为的个体变化的发生以及孕产妇营养如何影响这种变化知之甚少。我们测试了以下假设：雌性草地田鼠的雄性后田鼠（Microtus pennsylvanicus）在哺乳期的第1-7天（FR 1-7），哺乳期的第8-14天（FR 8-14）有30％的食物限制（FR） ，或哺乳期15-21的晚期（FR 15-21）相对于不受食物限制的雌性的雄性后代，对成年后的性行为表现出持续的负面影响。我们从男性98天开始测量了性行为的三个组成部分，即吸引力，亲和力和接受力。哺乳中期（FR 8-14）的食物限制，但哺乳初期（FR 1-7）和哺乳后期（FR 15-21）的食物限制不足以诱使成年雄性田鼠产生不如其产生的生殖器痕迹那么有吸引力。控制男性。哺乳期间的食物限制不会影响雄性田鼠的感受性行为，但会影响它们的感受性。在12 FR 8-14雄性田鼠中只有4只交配，而在12 FR 1-7雄性中有9雄性，在12 FR 15-21雄性中有8雄，而11例对照雄性中有8。但是，没有区别在交配的雄性中存在交配行为。身体FR 1–7和FR 8–14男性的体重低于FR15–21岁，对照组为22岁以下的男性（断奶）和48天（青春期），但当男性为98天时相似。在第22天至第98天之间，FR和对照男性的食物摄入量相似。但是，尚不清楚这种母体作用是否代表应对环境的后代行为的战略规划母亲经验丰富或是食物发育过程的产物断奶前的限制（href="#R18" rid="R18" class=" bibr popnode tag_hotlink tag_tooltip" id="__tag_527581277"> Forstmeier等。2004 ）。

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