Possible hybridization of Brazilian planorbid snails and its importance in population dynamics.

نویسندگان

  • C C Mello-Silva
  • C E Grault
  • V A da Costa
  • F S Barbosa
چکیده

This study focuses on the possibility of experimental hybridization among host snail species for Schistosoma mansoni in Brazil, with morphological characterization of the hybrids found. By using albinism as a genetic marker, intraspecific crossbreedings were performed between two strains of each species involved, in addition to interspecific crossbreedings; the only viable crossbreeding was between pigmented Biomphalaria glabrata (Paulista, PE) and albino B. tenagophila (Joinville, SC), with the formation of F1 and F2 generations. All offspring in F1 displayed black eyes and a renal ridge on the mantle, while F2 displayed dissociated morphological traits. With regard to reproduction, F1 was more efficient than F2. The experiment's results suggest post-zygotic reproductive isolation.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Descriptive study of Fascioliasis in Mazandaran province from seasonal

Introduction: About 2.400.000 human cases in 61 countries and 180000000 people at Fascioliasis infection risk, show the importance of human aspects of Fascioliasis around the world. In the north of our country (Iran) huge outbreaks of Fascioliasis have been seen and up to 10000 people have been infected with Fascioliasis in one of these outbreaks. So this study tries to show better criteria a...

متن کامل

Nematode Association with Bellamya bengalensis Snail and Its Medical and Veterinary Importance in Khouzestan Province (South West of Iran)

Limited studies have been done on nematodes of Bellamya bengalensis (fresh water snails) in the world. Following, our clinical observations on eye disease in a fish ponds, which were contained Bellamaya bengallensis snails, present study was made to determine of nematodes fauna of Bellamya bengalensis and evaluation of their medical and veterinary importance in Khouzestan province. For this pur...

متن کامل

Biological invasions: the case of planorbid snails.

A large number of planorbid snails are now commonly transported by man mainly through the aquatic plant trade. However, only a restricted number of species establish viable populations in a new habitat and a more restricted number spread. Only five planorbid species can be ranked in this last category and can be considered as pests because of their role in the transmission of parasites to human...

متن کامل

A Multiplex-PCR approach to identification of the Brazilian intermediate hosts of Schistosoma mansoni.

Due to difficulties concerning morphological identification of planorbid snails of the genus Biomphalaria, and given a high variation of characters and in the organs with muscular tissue, we designed specific polymerase chain reaction (PCR) primers for Brazilian snail hosts of Schistosoma mansoni from available sequences of internal transcribed spacer 2 (ITS2) of the ribosomal RNA gene. From th...

متن کامل

A review of helisoma duryi in biological control.

Biological control of schistosomiasis by means of introduction of the north American planorbid snail, Helisoma duryi, as a competitor of the intermediate host snails has been proposed. The systematics of the genus Helisoma and the geographic distribution of the different species is described. Papers dealing with laboratory experiments or field observations on the competition between H. duryi an...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Memorias do Instituto Oswaldo Cruz

دوره 93 Suppl 1  شماره 

صفحات  -

تاریخ انتشار 1998