Effect of season and social environment on testis size and semen quality of the adult Landrace boar

Journal of Animal Science
V L Trudeau, L M Sanford

Abstract

Eight adult Landrace boars were housed for 12 mo in one of two social environments. Socially nonrestricted boars were penned adjacent to and allowed minimal physical contact with ovariectomized gilts hormonally induced into estrus every 2 wk. Socially restricted boars were penned behind solid walls to eliminate visual and physical contact with other pigs. All animals were subjected to natural changes in daylength. Semen was collected weekly; gel-free volume, gel weight, sperm concentration and number per ejaculate, sperm motility (percent and type) and semen pH were determined. Total protein, citric acid contents and alkaline phosphatase activity were measured in seminal plasma. Testis length and width and various body temperature measurements were recorded monthly. Except for percent motile sperm and alkaline phosphatase activity, all semen characteristics varied (P less than .05) with month. The pattern of seasonal change in semen volume was modified by social environment (group X month, P less than .05). Sperm numbers were highest in winter and lowest in spring and summer. Ejaculate protein and citric acid contents were highest in fall and winter; decreases in spring were associated with moderate ambient temperatures and inc...Continue Reading

Citations

Mar 19, 2008·Reproductive Biology and Endocrinology : RB&E·Nikorn ThongtipAnuchai Pinyopummin
Oct 23, 2012·Systems Biology in Reproductive Medicine·Alfonso López RodríguezDominiek Maes
Jun 15, 2007·The Journal of Small Animal Practice·K ChatdarongS Raksil
Aug 5, 2017·Porcine Health Management·Alfonso Lopez RodriguezDominiek Maes
Jul 12, 2017·Molecular Reproduction and Development·John J ParrishFabiana C S A Melo
May 2, 2019·Frontiers in Genetics·Marta GòdiaAlex Clop
Jun 15, 2011·Acta Veterinaria Hungarica·Péter SarlósJózsef Rátky
Nov 18, 2000·Animal Reproduction Science·A CiereszkoJ Glogowski
Jul 3, 2021·Animals : an Open Access Journal From MDPI·José Néstor CaamañoCarlos Olegario Hidalgo

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