Chromosomal location polymorphism of major rDNA sites in two Mediterranean populations of the killifish Aphanius fasciatus (Pisces: Cyprinodontidae).
نویسندگان
چکیده
The chromosomes of the Mediterranean killifish, Aphanius fasciatus from two populations, the Lagoon of Venice (LV, 15 specimens) and the Lagoon "Stagnone di Marsala" (Sicily) (SM, 48 specimens), have been investigated using conventional Ag-staining and fluorescent in situ hybridization (FISH) with 18S rDNA probe. The two methods revealed variation in the number of major rDNA sites ranging from 8 to 14 (LV) and from 1 to 4 (SM) per individual. The fact that each individual possessed its own number of sites implies that observed variation was structural. Moreover, overlapping of silver staining and FISH patterns demonstrated that all ribosomal genes were transcriptionally active in each specimen.
منابع مشابه
Short communication:Potential ectoparasites of the endemic Mediterranean banded killifish (Aphanius fasciatus, Valenciennes, 1821) of the northern Sahara (Algeria)
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متن کاملShort communication:Potential ectoparasites of the endemic Mediterranean banded killifish (Aphanius fasciatus, Valenciennes, 1821) of the northern Sahara (Algeria)
The Aphanius fasciatus is an endemic fish species of the coastal Mediterranean region; and recently discovered in the northern Algerian Sahara. The aim of this study is to evaluate the infestation by ectoparasites on A. fasciatus in the new arid habitats where it was newly recorded. For this purpose, skin and gills of 95 fish caught in the Still Wadi (Still river), between September 2012 and Ju...
متن کاملComparative pattern of genetic structure in two Mediterranean killifishes 1 ( Aphanius fasciatus
متن کامل
Population structure of Killifish, Aphanius anatoliae (Cyprinodontidae) endemic to Anatolia in Lake Eğirdir-Isparta (Turkey)
The population structure of Aphanius anatoliae in Lake Eğirdir-Isparta-Turkey was studied, using 522 fish monthly in 2008. This study were observed in the number of individuals of each sex, age, weight and size compositions. In addition, the total length-weight relationship was calculated as well as the Von Bertalanffy growth equation. A study of the food uptake throughout the year h...
متن کاملPopulation structure of Killifish, Aphanius anatoliae (Cyprinodontidae) endemic to Anatolia in Lake Eğirdir-Isparta (Turkey)
The population structure of Aphanius anatoliae in Lake Eğirdir-Isparta-Turkey was studied, using 522 fish monthly in 2008. This study were observed in the number of individuals of each sex, age, weight and size compositions. In addition, the total length-weight relationship was calculated as well as the Von Bertalanffy growth equation. A study of the food uptake throughout the year has been ca...
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ورودعنوان ژورنال:
- Micron
دوره 36 3 شماره
صفحات -
تاریخ انتشار 2005