Field bioassays show heterospecific mating preference asymmetry between hybridizing North American Papilio butterfly species (Lepidoptera: Papillonidae)
Field bioassays show heterospecific mating preference asymmetry between hybridizing North American Papilio butterfly species (Lepidoptera: Papillonidae)
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DOI：
10.1007/s10164-002-0050-2
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发表时间：
2002-01-01
影响因子：
0.9
通讯作者：
Scriber, JM
中科院分区：
文献类型：
--
作者：
Deering, MD;Scriber, JM
自然杂交种的种间交配偏好的研究很少。然而，这是唯一的方法，潜在的关键栖息地的具体因素可以包括在交配行为评估。我们进行了交配选择（男性偏好）的研究，使用拴系对异种，大小匹配的处女黄色女性的凤蝶和P canadensis与自由飞行的男性P glaucus种群在中南部佛罗里达。和自由飞翔的雄性加拿大白蛉种群在密歇根州北方。佛罗里达男性显然更喜欢同种P glaucus女性的对，所示的触摸/尝试交配和实际交配观察。在1997年，66.7%的总尝试（n = 168）和94.2%的所有交配（n = 69）是与同种。在1998年，同样的模式，同种男性偏好观察，与触摸/尝试（n = 49）和100%的交配（n = 30）与P. glaucus女性的67.3%。与此相反，自然种群的加拿大P男性没有表现出预期的同种偏好。事实上，与野生P canadensis男性在t997一个非常强烈的偏好，观察到的异种P glaucus女性的对，占75.8%的所有触摸/尝试交配（n = 483）和81.7%的所有交配（n = 476）。这些杂交凤蝶种间交配偏好的强烈不对称性可能反映了灰蝶雌性的祖先特征，这可能是由于先前拥有的配偶感觉偏差或雌性中的“好基因”指标，导致了加拿大凤蝶雄性的强烈偏好。然而，不能排除在物种重叠（同域）的杂交区或附近的生殖隔离的加强。
Few studies of interspecific mating preferences of naturally hybridizing species have been done in the field. Yet this is the only way potentially critical habitat-specific factors can be included in mating behavior evaluations. We conducted mate selection (male preference) studies using tethered pairs of heterospecific, size-matched virgin yellow females of Papilio glaucus and P canadensis with free-flying male P glaucus populations in south-central Florida. and with free-flying male P canadensis populations in northern Michigan. Florida males clearly preferred the conspecific P glaucus females of the pairs, as indicated by the touches/attempted matings and by the actual copulations observed. In 1997, 66.7% of the total attempts (n = 168) and 94.2% of all copulations (n = 69) were with the conspecific. In 1998 the same pattern of conspecific male preference was observed, with 67.3% of the touches/attempts (n = 49) and 100% of the copulations (n = 30) being with the P. glaucus females. In contrast, the natural populations of P canadensis males did not show the expected conspecific preference. In fact, with wild P canadensis males in t997 a very strong preference was observed for the heterospecific P glaucus females of the pairs, accounting for 75.8% of all touches/attempted matings (n = 483) and 81.7% of all copulations (n = 476). The strong asymmetry in interspecific mating preferences among these hybridizing Papilio species may reflect an ancestral trait in P. glaucus females that elicits strong preference in P canadensis males, due perhaps to previously possessed mate sensory bias or "good genes" indicators in the females. However, reinforcement of reproductive isolation in or near the hybrid zone of species overlap (sympatry) cannot be ruled out.