Morphological variability in the Cuatro Cienegas cichlid, Cichlasoma minckleyi
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چکیده
منابع مشابه
Morphological variability in the Cuatro Cienegas cichlid,Cichlasomaminckleyi
The endemic cichlids of the Cuatro Cienegas Basin, Coahuila, Mexico are currently grouped in a single polymorphic species,Cichlasoma minckleyi.Twomorphs ofC.minckleyiwere distinguished largely by features of the trophic apparatus, especially the pharyngeal dentition. Variation in body shape, based upon analysis of a set of linear measures, was continuous and did not allow recognition of discret...
متن کاملHabitat Segregation among Trophic Morphs of the Cuatro Ciénegas Cichlid (Herichthys minckleyi) Segregación de hábitat entre formas tróficas de la mojarra de Cuatro Ciénegas (Herichthys minckleyi)
Herichthys minckleyi is an endangered, trophically polymorphic cichlid endemic to the Cuatro Ciénegas basin of Coahuila, Mexico. A molariform morph has stout pharyngeal teeth whereas a papilliform morph has numerous fine pharyngeal teeth. Individuals with intermediate pharyngeal dentition also exist, as does yet another morph, called piscivore. Previous studies indicated that morphs utilize dif...
متن کاملDiversity of aquatic prokaryotic communities in the Cuatro Cienegas basin.
The Cuatro Cienegas basin (Coahuila, México) is a composite of different water systems in the middle of the desert with unusually high levels of endemism and diversity in different taxa. Although the diversity of macrobiota has been well described, little is known about the diversity and distribution of microorganisms in the oligotrophic ponds. Here we describe the extent and distribution of di...
متن کاملA morphometric analysis of polymorphism in the pharyngeal dentition of Cichlasoma minckleyi (Teleostei: Cichlidae).
Dental polymorphism in teleost fishes often involves production of a robust dentition, or "molarization", in one morph. The lower pharyngeals of a sample of wild-caught individuals of the polymorphic Cuatro Cienegas cichlid, Cichlasoma minckleyi (Kornfield and Taylor) (Proc. Biol. Soc. Wash. 96 (1983) 253), were measured to investigate morphological changes associated with molarization. Princip...
متن کاملTrophic radiation through polymorphism in cichlid fishes.
Several morphologically defined species of cichlid fishes (Cichlasoma) endemic to the Cuatro Cienegas basin of Mexico and differing in tooth structure, body shape, and diet are allelically identical at 27 gene loci. The presence of only one Mendelian population in each of three drainage systems studied and the occurrence of two of the morphotypes in the same broods indicate that the supposed sp...
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ژورنال
عنوان ژورنال: Journal of Fish Biology
سال: 2003
ISSN: 0022-1112
DOI: 10.1046/j.1095-8649.2003.00006.x