THE TAILSPOT POLYMORPHISM OF XIPHOPHORUS (PISCES: POECILIIDAE)
نویسندگان
چکیده
منابع مشابه
Male polymorphism in Limia perugiae (Pisces: Poeciliidae).
The male-polymorphic poeciliid fish, Limia perugiae, a small teleostean endemic to the southeast of the Caribbean island Hispañola, consists of three male size morphs with uniform females. Large males differentiate at a size varying between 25 and 38 mm; intermediate males, between 21 and 25 mm. Under competition, large males exhibit an elaborate courtship display, whereas small males show only...
متن کاملSecondary reduction of preference for the sword ornament in the pygmy swordtail Xiphophorus nigrensis (Pisces: Poeciliidae)
Female mating preferences can be secondarily lost for a number of reasons. We examined the preference of female pygmy swordtails, Xiphophorus nigrensis, for the sword, a conspicuous extension of the caudal fin in some males. Females failed to show a preference for conspecific males with swords when presented with live males naturally varying in sword length, with live males of manipulated sword...
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متن کاملStability of small unisexual-bisexual populations of Poeciliopsis (Pisces: Poeciliidae)
All-female species of Poeciliopsis depend upon ~ ~ of closely related species for sperm. This relationship creates a competitive situation in which bisexual ~ ~ compete with unisexual ~ ~ for sperm from ~ ~ of the bisexual species. Earlier studies demonstrated a sufficient mechanism inherent in the behavior of ~ ~ for allowing coexistence in mixed unisexualbisexual populations. Courtship prefer...
متن کاملGenetic linkage map of fishes of the genus Xiphophorus (Teleostei: Poeciliidae).
Analysis of genotypes of 76 polymorphic loci in more than 2600 backcross hybrid individuals derived from intra- and interspecific genetic crosses of fishes of the genus Xiphophorus (Poeciliidae) resulted in the identification of 17 multipoint linkage groups containing 55 protein-coding loci and one sex chromosome-linked pigment pattern gene. Multipoint linkage analyses identified highly probabl...
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ژورنال
عنوان ژورنال: Evolution
سال: 1978
ISSN: 0014-3820,1558-5646
DOI: 10.1111/j.1558-5646.1978.tb04641.x