Comparison of the autogenous potentials of newly-emerged anautogenous female mosquitoes.
The autogenous potentials in several species of newly emerged anautogenous female mosquitoes were examined by homoplastic transplantion of resting stage ovaries into newly-emerged females. Ovaries from 4-day-old female Culex pipiens quinquefasciatus, with follicles at stage Ib, were all activated in the newly emerged hosts and deposited some yolk in the oocyte. In addition, some of the implants (5-10%) matured. Transplanted C. tritaeniorhynchus ovaries also started to develop beyond the Ib resting stage, but never grew beyond the IIb stage. Resting Armigeres subalbatus and Aedes albopictus ovaries, both follicles having already reached the IIa-IIb stages, did not show any further growth after being implanted into newly emerged hosts. However, resting Ae. albopictus ovaries matured when heteroplastically transplanted into Culex pipiens molestus (74%) or into Culex pipiens pallens (5%). In addition, Ae. albopictus females, acting as hosts, could mature transplanted C. p. molestus (23%) and C. p. pallens ovaries (10%). Thus, the above specific differences in autogenous potentials seem to reside not only in the internal environment of the hosts, but also in the ovaries themselves. Development of the host ovaries in the above homoplastic and heteroplastic transplantations were usually suppressed by the implanted donor ovaries and failed to reach the resting stages of each species.
Uchida
K
K
Department of Biology, Juntendo University, Hiraga Gakuendai 1-1, Inba-gun, Chiba, Japan