Publications

absence of ancient dna in sub-fossil insect inclusions preserved in 'anthropocene' colombian copal.	insects preserved in copal, the sub-fossilized resin precursor of amber, have potential value in molecular ecological studies of recently-extinct species and of extant species that have never been collected as living specimens. the objective of the work reported in this paper was therefore to determine if ancient dna is present in insects preserved in copal. we prepared dna libraries from two stingless bees (apidae: meliponini: trigonisca ameliae) preserved in 'anthropocene' colombian copal, dat ...	2013	24039876
cryptic bumblebee species: consequences for conservation and the trade in greenhouse pollinators.	commercial greenhouse growers in both japan and china are increasingly using reared orange-tailed bumblebees known previously as bombus hypocrita pérez as pollinators. phylogenetic analysis of the dna (coi) barcodes with bayesian methods shows that this "species" is a long-standing confusion of two cryptic species. we find that the orange-tailed bumblebees in north china are actually part of the widespread russian (otherwise white-tailed) b. patagiatus nylander (as b. patagiatus ganjsuensis skor ...	2012	22427924
[species diversity and colony characteristics of bumblebees in the hebei region of north china].	based on the 1893 specimens collected from hebei province, beijing city, and tianjin city in 2005-2009, and the specimens deposited in the institute of zoology, chinese academy of sciences, this paper analyzed the species diversity and colony characteristics of bumblebees in the hebei region of north china. a total of 32 species belonging to 8 subgenera of bombus were recorded, with 32 species in hebei province, 18 species in beijing, and 5 species in tianjin. the bumblebee in taihang mountains, ...	2010	20873633
the vitellogenin of the bumblebee, bombus hypocrita: studies on structural analysis of the cdna and expression of the mrna.	in this present study, the cdna of bombus hypocrita vitellogenin (vg) was cloned and sequenced. it is composed of 5,478 bp and contains an orf of 1,772 amino acids within a putative signal peptide of 16 residues. the deduced amino acid sequence shows significant similarity with bombus ignitus (95%) and apis mellifera (52%) and a high number of conserved motifs. close to the c terminus there is a gl/icg motif followed by nine cysteines, and a dgxr motif is located 18 residues upstream from the gl ...	2010	20012056
interspecific mating of the introduced bumblebee bombus terrestris and the native japanese bumblebee bombus hypocrita sapporoensis results in inviable hybrids.	the bumblebee bombus terrestris is not only an effective pollinator, but also a potential invasive alien species outside its native range. recently, nearly 30% of queens of the japanese native species bombus hypocrita sapporoensis and b. hypocrita hypocrita were estimated to copulate with b. terrestris males in the field, suggesting that indigenous bumblebees could be genetically deteriorated through hybrid production with the introduced species. in this study, we evaluated hybrid production bet ...	2008	18594790
effects of inflorescence size on visits from pollinators and seed set of corydalis ambigua (papaveraceae).	female reproductive success (seed set) of a spring ephemeral plant, corydalis ambigua cham. et schlecht (papaveraceae) was investigated in relation to inflorescence size and foraging behavior (frequency and duration of visitations) by pollinators (namely, overwintered queens of bombus hypocrita sapporensis) by detailed daily observations of a natural population. pollination experiments indicated that c. ambigua is self-incompatible and that seed set was significantly affected by the behavior of ...	1994	28312792