Alimentación de Phallotorynus Victoriae (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...
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Studies on fish parasites in Pampulha dam, Belo Horizonte, Minas Gerais, Brazil, found specimens of Poecilia reticulata Peters, 1859 harboring natural infection by larval stages of tapeworms. A total of 250 specimens of P. reticulata were collected and analyzed between February and August 2010, of which 23 were found infected (prevalence 9.2%) with one metacestode each (mean intensity 1, mean a...
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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 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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ژورنال
عنوان ژورنال: Natura Neotropicalis
سال: 2005
ISSN: 2362-5570,0329-2177
DOI: 10.14409/natura.v2i14.3431