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Sexual behaviour of the Montandon's newt, Triturus montandoni (Boulenger) (Caudata: Salamandridae)
In its general pattern the sexual behaviour of Triturus montandoni most resembles that of Triturus helveticus. The courtship consists of three phases: orientation, static display and retreat display,Expand
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Copper Metabolism Disorders Affect Testes Structure and Gamete Quality in Male Mice
In the present study, animals with a genetic defect in copper metabolism were used as a model organism to study the role of copper in reproduction and to determine whether the disturbances in copperExpand
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Retinoic acid homeostasis regulates meiotic entry in developing anuran gonads and in Bidder’s organ through Raldh2 and Cyp26b1 proteins
The vitamin A (retinol) and its metabolites such as retinoic acid (RA) affect vertebrate gametogenesis. The level of RA in cells relies on the balance between its synthesis and degradation. TheExpand
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Differentiation and Development of Gonads in the Yellow-Bellied Toad, Bombina variegata L., 1758 (Amphibia: Anura: Bombinatoridae)
The aim of this study was to investigate consecutive stages of gonadal development of the yellow-bellied toad (Bombina variegata) with particular emphasis on the origin of somatic and germ cellExpand
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Differential effects of testosterone and 17β-estradiol on gonadal development in five anuran species.
Sex hormones are essential for sexual differentiation and play a key role in the development of gonads in amphibians. The goal of this study was to evaluate the influence of exogenous sex steroids,Expand
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Sperm and spermatozeugma ultrastructure in the inseminating species Tyttocharax cochui, T. tambopatensis, and Scopaeocharax rhinodus (Pisces: Teleostei: Characidae: Glandulocaudinae: Xenurobryconini)
This article presents the scanning and transmission electron microscopy of the spermatozoa and sperm packets of three inseminating species of the glandulocaudine tribe Xenurobryconini. All threeExpand
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Spermiogenesis and fine structure of the spermatozoon in a headstander, Chilodus punctatus (Teleostei, Characiformes, Anostomidae).
  • A. Pecio
  • Medicine, Biology
  • Folia biologica
  • 2003
The main characteristic features of spermiogenesis in Chilodus punctatus (Characiformes) are rotation of the nucleus, development of a nuclear fossa, which extends as a narrow invagination deep intoExpand
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Sexual dimorphism of AMH, DMRT1 and RSPO1 localization in the developing gonads of six anuran species.
In vertebrates, several genes which are differentially expressed in various species, have been implicated in sex determination and gonadal differentiation. We used immunolocalization to study theExpand
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