02006nas a2200205   4500008004100000245009400041210006900135260001000204300001400214490000700228520140900235653001401644653001801658653001301676653001101689653001501700100002101715700001601736856004801752       2006                        eng d00aClose-range acoustic signaling and mate choice in Hawaiian crickets (Gryllidae: Laupala )0 aCloserange acoustic signaling and mate choice in Hawaiian cricke  cApril  a770–7760 v593 aAbstract&nbsp;&nbsp;Evolution of the mate recognition system (MRS) can play a central role in animal speciation. One dramatic consequence of changes in the MRS is the failure of individuals from divergent lineages to successfully court and mate, thereby reducing gene flow between these groups. Here, we test the role of an acoustic mating signal on mate choice in a Hawaiian cricket genus (Gryllidae: Laupala). Speciation in Laupala is proceeding at an extremely rapid rate, apparently driven by divergence in aspects of the mate recognition system, most conspicuously the pulse rate of male calling song. Previous studies demonstrate that females prefer the pulse rate of a conspecific male's song when perceived at long range, in laboratory phonotaxis trials. In this study, we examined mate choice in two species that differ dramatically in pulse rate: Laupala paranigra and Laupala kohalensis. We tested the female's preference in both species for pulse rates at close range, by providing females an opportunity to mate with hybrid males producing a range of intermediate pulse rates. Results of our study demonstrate that while strong behavioral barriers exist between these two species, variation in the pulse rate of male calling song did not predict female mate choice at close range. These results suggest a more complex architecture to mate recognition in Laupala than previously hypothesized.10abehaviour10acommunication10acrickets10ahawaii10aorthoptera1 aMendelson, Tamra1 aShaw, Kerry  uhttp://dx.doi.org/10.1007/s00265-005-0107-701818nas a2200181   4500008004100000245017300041210006900214260001300283300001800296490000700314520119400321653001701515653001301532653001101545653001501556100002001571856004501591       2002                        eng d00aConflict between nuclear and mitochondrial DNA phylogenies of a recent species radiation: What mtDNA reveals and conceals about modes of speciation in Hawaiian crickets0 aConflict between nuclear and mitochondrial DNA phylogenies of a   cDecember  a16122–161270 v993 a10.1073/pnas.242585899 It has been asserted that recent mtDNA phylogenies support the plausibility of sympatric speciation, long considered a controversial mechanism of the origin of species. If such inferences are reliable, mtDNA phylogenies should be congruent with phylogenies based on other data. In previous work, a mtDNA phylogeny suggested that diversification of the Hawaiian cricket genus was initiated by single invasions into each of several Hawaiian islands, followed by multiple sympatric divergences within each island. In contrast, a systematic hypothesis based on morphology argues that speciation in has occurred primarily in allopatry, with two independent species radiations diversifying across the archipelago. In this study, I analyze nuclear DNA (nDNA) sequences from to compare with sequences from the mtDNA. The nDNA phylogeny corroborates the hypothesis of allopatric divergence and multiple invasions, and when compared with mtDNA patterns, suggests that interspecific hybridization is a persistent feature of the history of . The discrepancy between mtDNA and nDNA phylogenies reveals that speciation histories based on mtDNA alone can be extensively misleading.10abioacoustics10acrickets10ahawaii10aspeciation1 aShaw, Kerry, L.  uhttp://dx.doi.org/10.1073/pnas.242585899