Skip to content
ASIG #5087

Image Gallery: Focus on sperm anatomy

By Dr. Harold Hafs

At first glance, a sperm (Animal Science Image Gallery #5140, shown below) appears to be a relatively simple cell. Upon closer examination, however, Dick Saacke observed some subtle differences among sperm. For example, sperm from bull 1 (upper left in #5140) have longer heads than those from bull 2 (upper right in #5140). In other words, these two bulls had morphologically distinctive heads that could be identified even when sperm from the two bulls was mixed as in the lower two photos in #5140. These kinds of anatomical differences affect fertility, because they are associated with differences in the ability of sperm to penetrate an ovum. Read more


Call for JAM 2015 late-breaking abstracts

April 16, 2015 – The 2015 Joint Annual Meeting Program Committee is calling for late-breaking abstracts of original research that highlight a broad spectrum of work, including cutting-edge, high-tech research that was completed recently and is important to the species or discipline. The submission deadline is 11:59 p.m. (CDT) on May 22, 2015. Read more


FDA releases new NARMS reports

April 16, 2015 - Antimicrobial resistance in Salmonella isolated from retail meat continues to decline, according to reports released this week by the U.S. Food and Drug Administration (FDA).

The reports measure antimicrobial resistance in certain bacteria isolated from raw meat and poultry collected through the National Antimicrobial Resistance Monitoring System (NARMS). The reports include the 2012 Retail Meat Annual Report and the 2013 Retail Meat Interim Report. Read more

Recent Articles


New procedure to test Newcastle disease vaccines

By Sandra Avant, ARS Public Affairs Specialist

April 15, 2015 - U.S. Department of Agriculture (USDA) scientists have developed an improved Newcastle disease virus (NDV) vaccine evaluation procedure that could be used to select better vaccines to treat the disease. Read more »

August 23 crop

Calendar of events

Mark your calendars!

Here is a list of upcoming agricultural and animal science events that you may want to attend. Read more »

fass logo

FASS to host animal care webinar

April 13, 2015 - The Federation of Animal Science Societies is hosting a webinar entitled “The Role of the FASS Ag Guide in Farm Animal Research” on Thurs., April 23, 2015 at 1:00 p.m. (CST). Read more »


Innovate poster abstracts due April 15

April 13, 2015 - The deadline for poster abstracts for Innovate 2015 is Wed., April 15, 2015 at 11:59 p.m. Central Daylight Saving Time. The theme of this year’s program is “Innovations in Education: An Animal Sciences Curriculum for the 21st Century.” Read more »


Sign up for JAM workshops

April 13, 2015 - JAM 2015 is offering two great workshops this year. If you have already registered for JAM and would like to add either of these workshops to your registration, please contact us at To keep up with the latest meeting details and to register, please visit the JAM 2015 website. Read more »