we investigated the effects of interaction between cotesia plutellae (kurdjumov) and bacillus thuringiensis berliner on parasitism and an immune effector (phenoloxidase activity) of a bt-susceptible and a bt-resistant population of plutella xylostella (linnaeus) in laboratory. parasitism success of c. plutellae varied depending on the use of b. thuringiensis or its toxin, and the timing of appl...

ectoparasites of various species of rodents were examined from sarepole zehab, kermanshah province iran during 2005. this city is bordered with iraq. a total of 139 rodents included 6 species of hosts were captured during all different seasons and examined for ectoparasites using live trap. the area of study was mainly plateu (70%) and mountanous. the hosts including: microtus socialis, mus mus...

Helminth communities in definitive hosts are formed by the acquisition of packets of larvae arriving each time an intermediate host is consumed. It is thus possible that associations between parasite species or other aspects of community structure get transferred from intermediate to definitive hosts. Earlier computer simulations showed that associations between 2 parasite species, in particula...

The hosts of long duration gamma-ray bursts are predominantly starburst galaxies at subsolar metallicity. At redshifts z<1, this implies that most them low-mass similar to the populations blue compact dwarfs and dwarf irregulars. What triggers massive star-formation (SF) needed for producing a GRB progenitor is still largely unknown, as resolved gas properties kinematics these their formation h...