title: Insemination rates of hybrids between Culex pipiens pipiens and Culex pipiens quinquefasciatus or Culex pipiens pallens at high temperature.
abstract: Females of Culex pipiens pallens are rarely inseminated at temperatures above 30 degrees C. Insemination and egg-hatching rates (F2) were examined in females of hybrids (F1) between Culex pipiens pipiens and Culex pipiens quinquefasciatus at 25 degrees C and 30 degrees C to examine temperature-dependent reproductive activity. Insemination rates were very high in hybrid females (F1) at 25 degrees C and 30 degrees C, and egg-hatching rate (F2) also was high at both temperatures. Crosses between Cx. p. pipiens and Cx. p. quinquefasciatus did not show insemination rates and egg-hatching rates similar to the rates observed in Cx. p. pallens, suggesting that the hybrids expressed reproductive activity characteristic of Cx. p. quinquefasciatus.
authors.affiliation: Department of Bacteriology, Nagasaki University School of Medicine, 1-12-4 Sakamoto, Nagasaki 852-8102, Japan.
authors.forename: Kenji
authors.initials: K
authors.lastname: Kurokawa
authors.forename: Katsutomo
authors.initials: K
authors.lastname: Kato
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Oda
authors.forename: Keikichi
authors.initials: K
authors.lastname: Uchida
authors.forename: Yuki
authors.initials: Y
authors.lastname: Eshita
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Tahara
authors.forename: Mariko
authors.initials: M
authors.lastname: Mine
authors.forename: Yasunori
authors.initials: Y
authors.lastname: Ogawa
mesh_terms: D000818:Animals; D003465:Culex / Q000502:physiology*; D005260:Female; D006358:Hot Temperature; D006824:Hybridization, Genetic / Q000502:physiology; D007314:Insemination / Q000502:physiology*; D008297:Male