BURKHARDT, D and DELAMOTTE, I and LUNAU, K (1994) SIGNALING FITNESS - LARGER MALES SIRE MORE OFFSPRING - STUDIES OF THE STALK-EYED FLY CYRTODIOPSIS-WHITEI (DIOPSIDAE, DIPTERA). JOURNAL OF COMPARATIVE PHYSIOLOGY A-SENSORY NEURAL AND BEHAVIORAL PHYSIOLOGY, 174 (1). pp. 61-64. ISSN 0340-7594,
Full text not available from this repository.Abstract
Some species of stalk-eyed flies (Diopsidae, Diptera) have a sexual dimorphism of eyespan. For example, Cyrtodiopsis whitei males have much longer eyestalks than females of equal body length. Expression of this trait increases with the bearers' size. The slope of the log-log regression line eyespan versus body length is close to two in males, while in females it is roughly one. Behavioural experiments suggest that male eyespan signals quantitatively a male's strength or attractiveness to a competitor or mate. We used 3 pure strains of C. whitei, which were distinguished by their different phosphoglucomutase allele outfit. We compared the reproductive success of males of different sizes and found the number of offspring to be directly proportional to body length. Thus eyespan, rising with the square of body length, provides an exaggerated and highly conclusive signal in the advertisement of fitness.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SEXUAL SELECTION; HANDICAPS; DISPLAY; FLIES; DIOPSIDAE; REPRODUCTIVE SUCCESS; SEXUAL SELECTION; OPTICAL SIGNALS; EYESPAN |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:41 |
| URI: | https://pred.uni-regensburg.de/id/eprint/53557 |
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