Cyrtodiopsis whitei
Webmonomorphic eye stalks are plesiomorphic in Cyrtodiopsis. Observations of multiple copulations by females in paired-choice mating chambers indicated that female C whitei and C. dalmanm exhibit relative preferences for longer eye stalks such that preference intensity increases linearly with the difference in eye stalk length between males. WebJun 28, 2008 · Spermatophores occur in four out of five investigated genera, in Cyrtodiopsis, Diasemopsis, Teleopsis, and in Sphyracephala, which is positioned close to the base of the family. Within the genus Diopsis the spermatophore is subject to reduction. Spermatophore size and copulation duration are positively correlated across the species.
Cyrtodiopsis whitei
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Webexperiments on the Malaysian stalk-eyed fly Cyrtodiopsis whitei we examined the consequences of variation in cop- ulation duration for sperm competition. In this sexually dimorphic species over 90% of all copulations occur in nocturnal aggregations with from one to four males and up to 24 females. WebCyrtodiopsis whitei is a species of Stalk-Eye Fly from the family of Diopsidae. Overview Photos Videos Map Share Subscribe Play More Stalk-Eyed Fly Photographed in South …
WebJan 15, 1998 · The frequency of biased sex ratio was 36% in C. whitei (n = 75 sires, 10,395 progeny; Fig. 1a) after about five generations in culture and 16% in C. dalmanni (n = 93 sires, 10,695 progeny; Fig. 1a ... Webcyrtodiopsis whitei short copulation copulation duration direct result non-irradiated male artificial inter-ruptions indicated sperm solitary male temporary mating plug field short …
Webeyed fly, Cyrtodiopsis whitei, influences progeny sex proportion, in order to determine if a common developmental mechanism could cause meiotic drive in these distantly related taxa. Because age has been found to a•ect the degree of segregation distortion in some Drosophila, we tested flies from six to 26 weeks of age. http://drosophila.biology.kent.edu/users/plorch/LorchPdfs/Lorchetal1993.pdf
WebThe Malayan stalk-eyed flyCyrtodiopsis whitei, of the family Diopsidae, exhibits sexual dimorphism in that the eyestalk span of the males exceeds the length of the body, …
incentives telkomWebin sperm precedence are not well understood. In the stalk-eyed fly,Cyrtodiopsis whitei (Diptera, Diopsidae), sperm precedence is influenced by the presence of sex chromosome meiotic drive. When drive-carrying males compete with non-driving males for fertilizations within a female, the number of progeny sired by drive males is significantly fewer incentives teachWebNov 29, 2013 · In Cyrtodiopsis whitei, two spermathecal ducts originate close together from a short pouch in the dorsal vagina wall (genital papilla) and bear apically single and double spermathecae, respectively. Kotrba ( 1993 ) reports that, during mating, the tip of a rod-shaped process of the male aedeagus enters, and possibly serves to pry open, the ... incentives spa babylon nyWebMay 14, 2001 · In contrast to D. melanogaster, C. whitei shows a small, neck-like constriction between the optic lobes and the rest of the brain. By 20% of pupal development, the divergence is more apparent, and by 30%, the future eye stalk and optic nerve of C. whitei has started to form. incentives spa and salonWebNov 1, 2011 · For example, in the stalk-eyed fly Cyrtodiopsis whitei, copulation duration exhibits a bimodal distribution with peaks at 10 and 50 s, and sperm are not. Acknowledgments. We thank Dr Zenobia Lewis for invaluable comments and English editing of the manuscript and Mr. Ushio Koizumi for useful advice on collecting and rearing of … incentives that arouse activity and energyWebHere we describe how sperm development in the stalk-eyed fly, Cyrtodiopsis whitei, influences progeny sex proportion, in order to determine if a common developmental … incentives taxableWebMalay species Cyrtodiopsis whitei (Curran), and first observations on two of the Bruneian species, Teleopsis pallifacies (Feijen) and Teleopsis belalongensis, reveal a similar behaviour: the males display fighting activity on the sleeping sites. Figures 1 to 3 show the allometric data of ... incentives thermwise.net