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The triozid Bactericera tremblayi, or onion psyllid, is recorded for the first time from France, and is associated for the first time with important damage on leek crops in several regions of the country. We compare the morphology of this species with the two other species of the B. nigricornis‐group, in order to avoid misidentifications, and illustrate the different stages of B. tremblayi. The published distribution of the three species is summarised and updated based on collection data, and the presence of B. tremblayi and B. trigonica in Jordan and Spain (Canary Islands) respectively, is also recorded for the first time. 相似文献
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Geheimen Regierungs und A. Burckhardt 《Forstwissenschaftliches Centralblatt》1911,33(8-9):457-468
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W. Liese A. Bernhart H. Burckhardt Hannes Mayer 《European Journal of Forest Research》1962,81(11-12):381-384
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Agonoscena pistaciae is a serious pest of pistachio in the Middle East and the Eastern Mediterranean. In this paper the presence of the species in Spain and Western Europe is confirmed. It is widespread in the regions of Castilla–La Mancha and Extremadura in Central Spain, where it develops mostly on Pistacia terebinthus, in contrast to the Middle East, where its preferred host is Pistacia vera. In the literature and internet sources, A. pistaciae is often confused with other, morphologically similar species, namely A. succincta and A. targionii. Morphological characters are listed and illustrated for the identification of the species found in the West Mediterranean. 相似文献
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John M. Fennell William C. Rosenthal Catherine E. Wagner Jason C. Burckhardt Annika W. Walters 《Ecology of Freshwater Fish》2023,32(1):94-106
Hybridisation with introduced taxa poses a threat to native fish populations. Mechanisms of reproductive isolation can limit or prevent hybridisation between closely related species. Understanding how these mechanisms interact between the same species across geographically distinct occurrences of secondary contact, and how regional factors influence them, can inform our understanding of hybridisation as a threat and management actions to mitigate this threat. We used data collected on adult fish migration timing and approximate emergence timing of subsequent juvenile fish paired with genomic data to assess whether temporal isolation in the timing of spawning exists between Yellowstone cutthroat trout, rainbow trout and hybrids in the North Fork Shoshone River drainage in northwest Wyoming. We found evidence that Yellowstone cutthroat trout spawn, on average, two to four weeks later than rainbow trout and hybrids and two environmental covariates related to water temperature and discharge were associated with differences in spawning migration timing. Despite statistical support for Yellowstone cutthroat trout spawning later, disproportionately high numbers of rainbow trout and hybrids, paired with extended spawning seasons, lead to substantial overlap between all genotypes. Our results provide further evidence of temporal segregation in the timing of spawning as a mechanism of reproductive isolation between closely related species, but substantial spawning overlap suggests temporal segregation alone will not be enough to curtail hybridisation in conservation populations. 相似文献
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