نتایج جستجو برای: semen characteristics

تعداد نتایج: 673044  

2005
S. H. Oh M. T. See J. M. Galvin

Currently, boars selected for commercial use as AI sires are evaluated on grow-finish performance and carcass characteristics. If AI sires were also evaluated and selected on semen production, it may be possible to reduce the number of boars required to service sows, thereby improving the productivity and profitability of the boar stud. The objective of this study was to estimate genetic correl...

Journal: :Asian journal of andrology 2011
Anne Vested Cecilia H Ramlau-Hansen Jens P Bonde Ane M Thulstrup Susanne L Kristensen Gunnar Toft

The aim of the present study was to compare assessments of sperm concentration and sperm motility analysed by conventional semen analysis with those obtained by computer-assisted semen analysis (CASA) (Copenhagen Rigshospitalet Image House Sperm Motility Analysis System (CRISMAS) 4.6 software) using semen samples from 166 young Danish men. The CRISMAS software identifies sperm concentration and...

2012
Ismail I. El-kon Samy A. Darwish

The current study was performed to test the of quality as well as the DNA integrity of preserved liquid and frozen buffalo spermatozoa due to addition of different concentrations of glutathione (0.50, 1.00, 2.00 and 3.00 mM). Liquid semen was preserved for 120 hour with or without addition of glutathione and examined for progressive motility, viability, plasma and acrosomal membranes integrity ...

Journal: :Urology 1999
J Hallak P N Kolettis V S Sekhon A J Thomas A Agarwal

OBJECTIVES To review a large experience with sperm cryopreservation in patients with testicular cancer and determine the effect of clinical stage and tumor histologic features on semen quality. METHODS The prefreeze and post-thaw sperm quality of 157 patients with testicular cancer was compared with that of 50 normal donors. The impact of tumor stage and histologic features (pure seminoma, pu...

2008
Nikorn Thongtip Jumnian Saikhun Sittidet Mahasawangkul Kornchai Kornkaewrat Pornsawan Pongsopavijitr Nucharin Songsasen Anuchai Pinyopummin

BACKGROUND One of the major obstacles in using artificial insemination to manage genetics of elephant population in captivity is the large variations in semen quality among ejaculates within the same and among individuals. The objectives of this study were to determine the influences of (1) age (2) seasonality (3) and circulating testosterone (SrTest), triiodothyronine (SrT3) and tetraiodothyro...

Journal: :Nigerian journal of physiological sciences : official publication of the Physiological Society of Nigeria 2014
A O Olatunji-Akioye O E Fayemi

Increasing production of goats takes their reproductive potential and fertility, into consideration. Gastrointestinal obstructive lesions can set up an intestinal ischaemia-reperfusion. Testicular torsion is an established cause of testicular damage and infertility and is a form of ischaemia-reperfusion injury. This study investigates the effect of intestinal ischaemia-reperfusion (IIR) injury ...

2013
Leticia Zoccolaro Oliveira Pablo Daniel Reeb Fabio Morato Monteiro Janaina Torres Carreira

Even though a practical in vitro semen assay for determining bull fertility would be of great benefit to reproductive programs [6], it is unlikely that the evaluation of a single sperm characteristic may reflect the real sperm fertilization capacity of a semen sample. Hence, finding a set of sperm characteristics considered important for predicting conception rate would be a useful method of mo...

Journal: :Small ruminant research : the journal of the International Goat Association 2000
Rege Toe1 Mukasa-Mugerwa Tembely Anindo Baker2 Lahlou-Kassi3

A study was conducted to investigate the effect of season on, and to estimate heritabilities of, and genetic correlations among, semen and spermatozoa characteristics and the relationship of these characteristics with measures of testicular or scrotal size in 6-, 9- and 12-month old ram lambs of Menz and Horro sheep breeds indigenous to Ethiopian highlands. A total of 278 ram lambs with substan...

2012

Genetic adaptation and response to selection depend on genetic variation within and between populations, whereas characterization of the population is a first step towards its improvement. This study demonstrates that variation in genotypes observed in reproductive performance observed among the Nigeria indigenous chicken under the tropical ambient temperature could be explained by the differen...

2014
P. Dorji V. Pattarajinda

The objective of the study was to assess the semen characteristics of Jersey, Mithun and Siri breeds of bulls and to compare the suitability of Tris Eggyolk Citrate and commercial soya lecithin based BIOXcell extenders for cryopreservation of semen from the these breeds of bulls. The mean semen volume was 4.55± 1.57, 4.86±1.33 and 4.83±1.72 ml in Jersey, Mithun and Siri bulls, respectively. Mea...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید