BIMS Lab, Institut Pasteur de Tunis, Université de Tunis el Manar, 13 place Pasteur, B.P. 74, Belvédère, 1002 Tunis, Tunisie.
Ecology & Evolutionary Biology, College of Arts & Sciences, The University of Tennessee, 569 Dabney Hall, Knoxville, TN 37996-1610, USA.
J Theor Biol. 2018 Jul 14;449:53-59. doi: 10.1016/j.jtbi.2018.04.011. Epub 2018 Apr 12.
Both empirical and theoretical studies, have dealt with the question how to best optimize reproductive fitness for hermaphrodites, using models such as game theory or complicated energetic costs and benefits of mating displays. However, hermaphrodites exhibit a broad spectrum of sexual behaviors like simultaneous, sequential or lifetime gonochorist that cannot be explained using a unique formalism. A possible explanation of this diversity relies on the way these species maximize their fitness: Does the individual hermaphrodite split its time between strategies maximizing its instantaneous reproductive fitness or its evolutionary fitness? Here, we compare these two points of view and extend a game theoretical formalism to a sex allocation model that underlies all sexual behaviors as a result of a dynamic game whose payoff depends on the costs and benefits of sexual reproduction. Using this formalism, we prove that a simultaneous hermaphrodites strategy is stable even for high values of sex changing costs. Moreover, we prove that the stability of a sequential hermaphrodite is linked to the average energy allocated to the pure female strategy.
实证和理论研究都探讨了如何通过博弈论或交配展示的复杂能量成本和收益等模型，使雌雄同体动物的生殖适应性达到最佳。然而，雌雄同体动物表现出广泛的性行为，如同时、顺序或终生雌雄异体，这些不能用单一形式来解释。这种多样性的一种可能解释依赖于这些物种最大限度地提高适应性的方式：个体雌雄同体动物是否会在最大化其瞬时生殖适应性或进化适应性的策略之间分配时间？在这里，我们比较了这两种观点，并将博弈论形式主义扩展到一种性别分配模型，该模型是所有性行为的基础，是一个动态博弈的结果，其收益取决于有性生殖的成本和收益。使用这种形式主义，我们证明了即使在高性别转换成本的情况下，同时雌雄同体动物的策略也是稳定的。此外，我们证明了顺序雌雄同体的稳定性与分配给纯雌性策略的平均能量有关。
