7 Result(s)
within
Rüdiger W. Schulz
Life Sciences
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Article
Open AccessInsulin-like 3 affects zebrafish spermatogenic cells directly and via Sertoli cells
Pituitary hormones can use local signaling molecules to regulate target tissue functions. In adult zebrafish testes, follicle-stimulating hormone (Fsh) strongly increases the production of insulin-like 3 (Insl...
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Article
Open AccessDevelopment of supermale and all-male Atlantic salmon to research the vgll3 allele - puberty link
Farmed Atlantic salmon are one of the most economically significant global aquaculture products. Early sexual maturation of farmed males represents a significant challenge to this industry and has been linked ...
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Article
Open AccessThe initiation of puberty in Atlantic salmon brings about large changes in testicular gene expression that are modulated by the energy status
When puberty starts before males reach harvest size, animal welfare and sustainability issues occur in Atlantic salmon (Salmo salar) aquaculture. Hallmarks of male puberty are an increased proliferation activity ...
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Article
Social stimulation, nuptial colouration, androgens and immunocompetence in a sexual dimorphic cichlid fish
The nature of the costs maintaining honesty of sexual signalling in inter- and intrasexual interactions remains a contentious issue. For carotenoid-based colour ornaments, it has been hypothesized that the hon...
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Article
Spermatogenesis and its endocrine regulation
Three major phases compose spermatogenesis: mitotic proliferation of spermatogonia, meiosis of spermatocytes, and spermiogenesis, the restructuring of spermatids into flagellated spermatozoa. The process is fu...
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Article
Specific binding of 11-ketotestosterone in an androgen target organ, the kidney of the male three-spined stickleback,Gasterosteus aculeatus
The kidney of male three-spined stickleback,Gasterosteus aculeatus, hypertrophies during the breeding season and produces a “glue” which is used in the building of the nest. This hypertrophy is androgen dependent...
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Article
Testicular responsiveness to gonadotropic hormonein vitro and Leydig and Sertoli cell ultrastructure during pubertal development of male African catfish (Clarias gariepinus)
The gonadotropin (GTH)-stimulated testicular androgen secretionin vitro and the ultrastructure of Leydig and Sertoli cells was studied during the pubertal development in male African catfish. Testicular weight in...
