Species recognition by male swordtails via chemical cues
Species recognition by male swordtails via chemical cues
复制标题
雄性剑尾鱼通过化学线索进行物种识别
DOI：
--
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
G. Rosenthal
中科院分区：
文献类型：
--
作者：
B. Wong;H. Fisher;G. Rosenthal
物种识别往往在雌性交配偏好中发挥关键作用。从男性的角度来看，对同种配偶识别的了解要少得多。在许多密切相关的类群中，雌性几乎没有明显的视觉差异，而雄性在识别配偶时可能不得不注意化学线索，这一可能性在脊椎动物中很少被探索。在这里，我们通过剑尾鱼的气味线索来检验雄性物种的识别。在二分选择实验中，我们首先测试了男性是否会对女性气味做出反应。我们发现，雄性被同种雌性气味和相关的异地同源剑鱼的气味所吸引，而不是水对照。然而，雄性对雌性的气味没有反应，这是一种近缘关系更远的共域贝类--剑尾鱼。然后，我们让雄性白纹伊蚊在同种和异种雌性刺激物之间进行选择。在这种情况下，当替代品是贝壳类时，雄性更喜欢同种气味。然而，当给出马林氏并殖吸虫的气味线索时，雄性白桦实际上更喜欢异种雌性。这里报告的一系列复杂的偏好，以前只记录在女性身上，强调了在决定实际交配结果时考虑两性行为的必要性。关键词：化学交流，配偶选择，斑潜蝇科，生殖隔离，性选择，物种形成。[Behaviv Ecol16：818-822(2005)]
Species recognition can often play a key role in female mating preferences. Far less is known about conspecific mate recognition from the male perspective. In many closely related taxa, females exhibit few obvious visual differences and males might have to attend to chemical cues in mate recognition, a possibility that has rarely been explored in vertebrates. Here, we examine male species recognition via odor cues in the swordtail fish, Xiphophorus birchmanni. In dichotomous choice experiments we first tested whether males respond to female odor cues. We found that males were attracted to conspecific female odor and those of a related allopatric congener, Xiphophorus malinche, over a water control. Males did not, however, respond to the female odor of the more distantly related sympatric platyfish, Xiphophorus variatus. We then gave male X. birchmanni the choice between conspecific and heterospecific female stimuli. Males, in this scenario, significantly preferred the conspecific odor when the alternative was platyfish. However, when offered odor cues of X. malinche, male X. birchmanni actually preferred the heterospecific female cue. The complex array of preferences reported here, previously documented only in females, underscores the need to consider the behavior of both sexes in dictating actual mating outcomes. Key words: chemical communication, mate choice, Poeciliidae, reproductive isolation, sexual selection, speciation. [Behav Ecol 16:818–822 (2005)]