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Cystic spermatogenesis in three species of the prolixus complex (Hemiptera: Triatominae)
(Taylor &francis Ltd, 2015-04-03)
The reproductive biology of triatomines and, more specifically, the general aspects of spermatogenesis and spermiogenesis are well known. However, reported structural analyses of the testicles are restricted to the genus ...
Spermatogenesis and karyotypes of three species of water striders (Gerridae, Heteroptera).
(2010-10-27)
Although they are of economic importance, there have been few cytogenetic studies of the Gerridae (Heteroptera) in Brazil. We examined spermatogenesis (meiosis and spermiogenesis) and nucleolar behavior in three species ...
Estrogen-induced inhibition of spermatogenesis in zebrafish is largely reversed by androgen
(Bioscientifica Ltd, 2018-05-01)
The hormonal regulation of spermatogenesis involves both gonadotropins and steroid hormones. Long-term in vivo exposure of adult zebrafish to estrogen impaired spermatogenesis associated with an androgen insufficiency, ...
An overview of functional and stereological evaluation of spermatogenesis and germ cell transplantation in fish
(2009-01-01)
Although there are almost thirty-thousand species of fish living in a great variety of habitats and utilizing vast reproductive strategies, our knowledge of morphofunctional and quantitative aspects of testis structure and ...
Morphological study of the spermatogenesis in the teleost Piaractus mesopotamicus
(Inst Histol Embriol-conicet, 2003-12-01)
The spermatogenesis of Piaractus mesopotamicus was investigated under light and transmission electron microscopy. The specimens were captured from their natural environment (Rio Miranda and Rio Aquidauana, Pantanal ...
Morphological study of the spermatogenesis in the teleost Piaractus mesopotamicus
(2003-12-01)
The spermatogenesis of Piaractus mesopotamicus was investigated under light and transmission electron microscopy. The specimens were captured from their natural environment (Rio Miranda and Rio Aquidauana, Pantanal ...
Ultrastructural Study of Spermatogenesis in Eisenia foetida (Annelida, Oligochaeta)
(Sociedad Chilena de Anatomía, 2007)
Sperm of Doradidae (Teleostei: Siluriformes)
(Churchill Livingstone, 2011-02-01)
Spermatic characteristics were studied in 10 species representing several distinct groups within the catfish family Doradidae. Interestingly, different types of spermatogenesis, spermiogenesis and spermatozoa are correlated ...
Characterization of bovine transcripts preferentially expressed in testis and with a putative role in spermatogenesis
(Elsevier B.V., 2011-10-01)
Although the number of genes known to be associated with bovine spermatogenesis has increased in the past few years, regulation of this biological process remains poorly understood. Therefore, discovery of new male fertility ...