Essays about: "spermatogenesis"

Showing result 6 - 10 of 10 essays containing the word spermatogenesis.

  1. 6. Inhibition of SIRT1 Alters Apoptotic and Sex Related Genes in Zebrafish (Danio rerio)

    University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

    Author : Kim Aarseth Larsson; [2014]
    Keywords : ;

    Abstract : Sirtuin 1 (SIRT1) is a nicotinamide adenine dinucleotide - dependent deacetylase that belongs to the sirtuin protein family. The protein has been linked to both cancer through its effect on p53 and age related illnesses through its effect on peroxisome proliferator-activated receptor gamma (PPAR-γ). READ MORE

  3. 7. Sperm morphology and reproductive isolation in Ficedula flycatchers

    University essay from Zooekologi; Institutionen för biologisk grundutbildning

    Author : Murielle Podevin; [2011]
    Keywords : evolution; speciation; sperm; flycatchers; gametic isolation; hybridization;

    Abstract : Speciation lies at the heart of evolution and the study of reproductive barriers allows a better understanding of the different steps leading to the complete isolation of two species. Pre-mating (behavior tactics, habitat or food divergence, phenotypic divergence and assortative mating) and post-mating, post-zygotic isolation barriers (selection against unfit hybrids) are well studied in numerous species, but little is known about what is happening between insemination and fertilization (post-mating, pre-zygotic isolation barriers). READ MORE

  4. 8. Gene expression of the gonadotropin receptors and anti-Müllerian hormone in early maturing male Atlantic salmon parr, Salmo salar

    University essay from Karlstads universitet; Fakulteten för samhälls- och livsvetenskaper

    Author : Susanne Trombley; [2009]
    Keywords : Salmo salar; spermatogenesis; FSHR; LHR; AMH; puberty;

    Abstract : An up-regulation of gene expression of the gonadotropin receptors FSHR and LHR, and a down-regulation of anti-Müllerian hormone (AMH), in the gonads of early maturing male Atlantic salmon parr (Salmo salar) have been shown to take place during the process of sexual maturation. It has however not been determined if this happens prior to or after the onset of spermatogenesis. READ MORE

  5. 9. Patologiska förändringar och säsongsmässiga variationer i testiklar från svenska brunbjörnar (Ursus arctos)

    University essay from SLU/Dept. of Biomedical Sciences and Veterinary Public Health

    Author : Jenni Lennse; [2008]
    Keywords : brunbjörn; testiklar; cystor; sädesledare; säsongsvariation;

    Abstract : Functioning reproductive organs are essential for the survival of a species. The reproductive system is very sensitive to exposure of chemical substances of anthropogenic origin. READ MORE

  6. 10. Behandling av hanhundar med deslorelin

    University essay from SLU/Dept. of Clinical Sciences

    Author : Emilia Jigler; [2008]
    Keywords : kastration; hanhund; suprelorin; deslorelin; GnRH-agonist; testosteron; reproduktion;

    Abstract : This article presents a survey of male dogs treated with the gonadotropin releasing hormone (GnRH) agonist deslorelin (Suprelorin®, Virbac) at three animal clinics in central Sweden. Filled-in questionnaires from 110 dogs were received. READ MORE