Caring males do not respond to cues about losses in paternity in the burying beetle Nicrophorus vespilloides
Caring males do not respond to cues about losses in paternity in the burying beetle Nicrophorus vespilloides
复制标题
在埋葬甲虫 Nicrophorus vespilloides 中，有爱心的雄性不会对有关失去亲子关系的线索做出反应
DOI：
10.1016/j.anbehav.2017.03.017
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发表时间：
2017
期刊：
影响因子：
2.5
通讯作者：
P. Smiseth
中科院分区：
文献类型：
--
作者：
M. Paquet;Ross Wotherspoon;P. Smiseth
亮点预计雄性会减少对亲子鉴定损失的亲代投资。为此，雄性需要可靠的亲子鉴定损失线索。我们在埋葬甲虫中操纵了三种亲子鉴定损失线索。我们发现对雄性照顾、体重变化或后代体重和数量没有影响。在双亲照顾的物种中，雄性可能会受到选择来调整其为后代提供的照顾量，以应对亲子鉴定损失。先前对鸟类和鱼类的研究为男性护理对父权丧失的临时调整提供了混合的经验证据。造成这种不一致的一个潜在原因是，男性需要获得有关失去亲子关系的可靠线索，并且可能很难评估男性使用了哪些线索（如果有的话）。在这里，我们操纵了埋葬甲虫 Nicrophorus vespilloides 中父子关系丧失的三个线索：（死亡的）雄性竞争对手的存在（N = 44），雌性的暂时消失（N = 41）以及雌性竞争对手的表皮碳氢化合物的存在（N = 44）。我们关注这三个线索，因为有证据表明雄性在其他物种中对这些线索做出反应，也有证据表明我们的研究物种在其他情况下对这些线索做出反应。我们发现这三个线索对雄性提供的直接或间接照顾量、雄性体重变化或后代的数量和体重没有影响。我们的研究结果没有提供任何证据表明单亲父母会根据失去父权的线索来调整他们对当前子女的投资。之前的研究表明，大多数到达尸体的野生雌性已经储存了精子，因此雄性很可能通过与雌性频繁交配而进化出对雌性一妻多夫的固定反应。
HighlightsMales are expected to reduce their parental investment to losses in paternity.To do so males need reliable cues of losses in paternity.We manipulated three cues of losses in paternity in the burying beetle.We found no effect on male care, weight change, or offspring weight and number.In species with biparental care, males may be under selection to adjust the amount of care they provide for their offspring in response to losses in paternity. Previous work on birds and fishes provide mixed empirical evidence for facultative adjustments in male care to losses in paternity. One potential reason for this inconsistency is that males need access to reliable cues of losses in paternity, and that it might be difficult to assess what cues, if any, are used by males. Here we manipulated three cues of losses in paternity in the burying beetle Nicrophorus vespilloides: the presence of a (dead) rival male (N= 44), the temporary absence of the female (N= 41) and the presence of a rival male's cuticular hydrocarbons on the female (N= 44). We focused on these three cues because there is evidence that males respond to these cues in other species and there is also evidence that our study species responds to these cues in other contexts. We found no effect of the three cues on the amount of direct or indirect care provided by the male, male weight change, or the number and weight of offspring. Our results provide no evidence that single male parents adjust their investment in the current brood based on cues of losses in paternity. As previous work showed that most wild females arriving on a carcass already store sperm, it is likely that males have evolved a fixed response to female polyandry by mating very frequently with the female.