Sneakers take a predation risk to gain sneaking opportunities

Sneakers take a predation risk to gain sneaking opportunities
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运动鞋冒着掠夺的风险来获得潜行的机会

DOI:
10.1016/j.anbehav.2020.07.020
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发表时间:
2020
期刊:
影响因子:
2.5
通讯作者:
Ota Kazutaka
Ota Kazutaka
中科院分区:
生物学2区
文献类型:
--
作者:
Mon S.M.;Yamada;T. and Okuda;T.;Ota Kazutaka

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交配行为阻碍了动物有效地发现和逃离捕食者的能力,从而增加了被捕食的风险。在这里,一个新的问题,即不同的生殖策略如何不同地影响这些能力,在三鳍金枪鱼Enneapterygiusetheostoma中进行了研究。一种缓慢的捕食者方法被呈现给具有不同交配策略(领地和潜行)和交配状态(交配和非交配)的雄性,总共有四种组合。当雄性变得警惕时,捕食者与雄性之间的距离与策略无关。交配雄鼠的距离比非交配雄鼠短,但只有当雄鼠面对刺激时才会这样。因此,交配状态同样削弱了这两种战术的危险检测能力。穿着运动鞋的交配状态很好地预测了雄性开始逃跑时捕食者-雄性之间的距离,交配个体的距离更短;然而,在领地雄性中,这一点并不明显。因此,运动鞋在交配时比领地雄性更晚逃脱,但两只雄性在非交配状态下与捕食者逃脱的距离相似。相反,交配的领地雄性比非交配的雄性更早返回产卵地点。总体而言,运动鞋做出了大胆的逃跑决定,而领地雄性在返回产卵地点时变得容易冒险。总而言之,偷偷摸摸的雄性在交配时付出了捕食的代价。
The act of mating increases predation risk by hindering an animal's ability to detect and escape from predators efficiently. Here, a novel issue of how alternative reproductive tactics differently influence these abilities was examined in the triplefin blenny,Enneapterygiusetheostoma. A slow predator approach was presented to males with different mating tactics (territorial and sneaking) and mating states (mating and nonmating), totalling four combinations. Predator–male distance when males became wary was independent of tactics. The distance was shorter for mating males than nonmating males, but only when males faced away from the stimulus. Thus, mating state diminished the capacity for detecting danger similarly for both tactics. Predator–male distance when males initiated the escape was well predicted by mating state in sneakers, with shorter distances for mating individuals; however, the same was not obvious in territorial males. Consequently, sneakers escaped later than territorial males during mating, but both males escaped at a similar distance from the predator when in a nonmating state. Instead, mating territorial males returned to the spawning sites earlier than nonmating males. Overall, sneakers made bold escape decisions, whereas territorial males became risk prone when returning to the spawning sites. In conclusion, sneaking males pay a predation cost when mating.
在体外受精的鱼中,运动鞋如何以及在多大程度上接近雌性?
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