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19 articles for “Spermatozoa”
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Research ArticleOpen accessIn the abstractBiotic and Abiotic Factors of Sperm nDNA Fragmentation in Farm AnimalsBaylar Iolchiev, Natalya Volkova, Pavel Klenovitskiy et al.Infertility and subfertility are among the global challenges of our time. Fertility in livestock farming is not only biologically important, it is also economically important. The aim of this study was to study the effect of these factors on sperm chromatin nucleus and to assess the impact of the fragmentation index degree on bull reproductive performance. The influence of abiotic … …American Journal of Animal and Veterinary Sciences, Vol. 16, Issue 1 · 11 Mar 2021 · 6,714 accessesView PDFCite
Research ArticleOpen accessIn the abstractInfluence of Different Freezing Curves on the Acrosome Integrity of Male Goat Sperm CellsSofia Alexandra Fagundes Lopes, Henrique José Duarte Rosa, António Chaveiro, Fernando Moreira da SilvaThe aim of the present study was to evaluate the effect of three different freezing curves on male goat’s sperm viability and acrosome integrity. Semen was collected on three adult male goats in February (Azores, Portugal, latitude 38°39′N) using an artificial vagina and a female with induced heat. Three collection sessions were spaced of approximately 5 days. The study followed … …American Journal of Animal and Veterinary Sciences, Vol. 16, Issue 1 · 19 Feb 2021 · 6,616 accessesView PDFCite
Research ArticleOpen accessIn the abstractSperm DNA Fragmentation and Apoptosis Levels: A Comparison of the Swim up and the Density Gradient Centrifugation Methods for Sperm PreparationSilvia W. Lestari, Triyana Sari, Dwi A. PujiantoThis study investigated the efficiency of two sperm preparation methods, namely, density gradient centrifugation and the swim-up method, in selecting spermatozoa based on the DNA fragmentation index and the apoptosis levels. Fifteen semen samples from infertile couples underwent sperm preparation in this study. The Makler® counting chamber and Eosin Y staining were used to analyse the sperm concentration, motility and … …OnLine Journal of Biological Sciences, Vol. 16, Issue 4 · 14 Nov 2016 · 7,419 accessesView PDFCite
Research ArticleOpen accessIn the abstractOxidative Status of Boar Semen during StorageEraldo Zanella, Ricardo Zanella, Márcia Rósula Poetini et al.The intensification of the use of artificial insemination in the swine industry has increased the interest to develop proper conditions to store semen better for longer periods of time without affecting its fertility. Trolox is a vitamin E analog with antioxidant property to prevent oxidative stress. Therefore, the objective of this study was to evaluate the Trolox antioxidant capacity on … …American Journal of Biochemistry and Biotechnology, Vol. 12, Issue 2 · 31 May 2016 · 7,550 accessesView PDFCite
Research ArticleOpen accessIn the abstractEvidences for the Role of Melatonin as a Protective Additive During Buffalo Semen FreezingMohamed El-Raey, M. R. Badr, Z. M. Rawash, G. M. DarwishTill now, the exact role of melatonin in male infertility hasn’t been fully discovered. Moreover, the intracellular signaling pathways activated by melatonin in buffalo spermatozoa especially on the level of cryopreservation process haven’t been reported. The current study aimed simply to clarify the precise role of this hormone during buffalo semen cryopreservation. Semen samples were obtained randomly from 6 fertile … …American Journal of Animal and Veterinary Sciences, Vol. 9, Issue 4 · 23 Dec 2014 · 8,112 accessesView PDFCite
Research ArticleOpen accessIn the abstractAluminium Chloride Exposure Had No Effects on the Epididymis of Wistar RatsSamuel Adeniyi Ojo, Joseph Olajide Hambolu, Sunday Samuel Adebisi, Adebayo Adekunle BuraimohAluminium is a ubiquitous element and one of the trace elements with moderate toxic effect on living organism. It is generally a recognized neurotoxin that is believed to be at the root cause of Alzheimer’s disease and third most abundant element in the earth’s crust after oxygen and silicon. Traditionally, aluminium has been considered as nontoxic to humans. However, in … …Current Research in Medicine, Vol. 3, Issue 2 · 25 Aug 2012 · 7,453 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe Reproductive Tract of the Males of the Zoophytophagous Predator Brontocoris tabidus (Signoret) (Heteroptera: Pentatomidae) with Different Diets and AgesWalkymario de Paulo Lemos, Rafael Coelho Ribeiro, Francisco de Sousa Ramalho et al.Abstract: Problem statement: Brontocoris tabidus (Signoret) (Heteroptera: Pentatomidae) is a common and important species for the biological control of defoliating Lepidoptera caterpillars. Although it has a predatory feeding habit, this species make use of plant resources, which are essential for the maintenance of its population in laboratory colonies as well as in the field during periods of prey shortage. Thus … …American Journal of Agricultural and Biological Sciences, Vol. 6, Issue 1 · 15 Dec 2010 · 8,419 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffects of Stripping Frequency on Semen Quality of Endangered Caspian Brown Trout, Salmo trutta caspiusSaeed Hajirezaee, Bagher Mojazi Amiri, Ali Reza MirvaghefiProblem statement: Because of dramatic declines in stocks of endangered Caspian brown trout males, Salmo trutta caspius in Caspian Sea, each male brooder is stripped indispensably more than once during the spawning season in other to artificial insemination in hatchery. The aim of the present study was to assay the changes of indicators of semen quality (sperm motility, sperm production, … …American Journal of Animal and Veterinary Sciences, Vol. 4, Issue 3 · 30 Sep 2009 · 7,478 accessesView PDFCite
Research ArticleOpen accessIn the abstractMorpho-physiological Differences of the Spermatheca of Attini Ants (Hymenoptera: Myrmicinae)Gabriela Ortiz, Maria Izabel Camargo-MathiasThe insect's spermatheca store the spermatozoa from the time of copulation until the fertilization of the eggs and consists of a sac, usually associated to glands. The ant species Atta laevigata, Atta sexdens sexdens, Atta sexdens piriventris, Acromyrmex coronatus and Cyphomyrmex muelleri are considered pests, as they cause economics losses to several crops. The spermatheca of these species were examined … …American Journal of Agricultural and Biological Sciences, Vol. 1, Issue 4 · 31 Dec 2006 · 7,583 accessesView PDFCite