Table of Contents
 Livestock summary
 Success for the Fifty-third Annual...
 7th Annual Hay Field Day

Group Title: Animal science newsletter
Title: Animal science newsletter ; June 2004
Full Citation
Permanent Link: http://ufdc.ufl.edu/UF00067334/00053
 Material Information
Title: Animal science newsletter ; June 2004
Series Title: Animal science newsletter
Physical Description: Serial
Language: English
Creator: Department of Animal Sciences, IFAS
Publisher: Florida Cooperative Extension Service, Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida
Publication Date: June 2004
 Record Information
Bibliographic ID: UF00067334
Volume ID: VID00053
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.


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Table of Contents
    Table of Contents
        Page 1
    Livestock summary
        Page 2
    Success for the Fifty-third Annual Beef Cattle Short Course
        Page 3
    7th Annual Hay Field Day
        Page 4
        Page 5
        Page 6
        Page 7
        Page 8
Full Text

In This Issue...

Beef Management Calendar
Li stock Summary 2
Success for the Fifty-third annuall Beef Cattle Short Course i
Call for Consignments 2004 Florida Bull Test 4
7"'' annual Ha,' Field Day 4
Flo.., C ,tometr, ...as 90''.:. accurate in Sorting Sperm Into
Male and Female Cells 5
Sire M.llk EPDs VVere Closely Related to Production of
Their Daughters 5
Effect of Early Veaning on Replacement Heifer Production I
Emerging Issues for Co Herds I5
Effect of Ractopamne on Feedlot Performance Carcass
Traits and Sensory Characteristics I*
Effect of Limit-Feeding on Performance and Carcass
Bronson Takes actionn to leep animall Cisease COut of Florida -
Risk M.anagement In The Cattle Business ."n Emphasis on
P.1arketing 8

Prepared by Extension Specialists in
Animal Sciences
J.D. Arthington
Beef Cattle Management, Ona
*: J.N. Carter
Beef Cattle Extension Specialist, Marianna
*: GR. Hansen
Beef Cattle Production, Marianna
*: EG Hembry, Professor
Department Chairman, Gainesville
M.J. Hersom
Extension Beef Cattle Specialist, Gainesville
E.L. Johnson, Associate Professor
Extension Equine Specialist, Gainesville
T.T. Marshall, Professor
Beef Cattle Management, Gainesville
R.O. Myer, Professor
Animal Nutritionist, Marianna
R.S. Sand, Associate Professor
Extension Livestock Specialist, Gaine vile
: W. Taylor, Coordinator
Youth Education/ ...,... Gainesville
o S.H. TenBroeck, Associate Professor
Extension Equine Specialist, Gainesville
o T.A. Thrift, Assistant Professor
Beef Cattle Nutrition. Gainesville

SDates to Remember

11-13 Horse Camp English
14 Open Bids for Horse Teaching Unit Sealed Bid Sale -
Gainesville, FL
14- 4IN -1I LD. I. ( aI1il ( iiinci idl .\'iIculll iC 't illlinlr L)a.
( a ll'1 ( ji. ii,'. di I L
16-18 FCA Annual Convention and Allied Trade Show -
Marco Island, FL
17 H( .\ Bull .ic L M 1ar,. IL.nd. IL
18-20 Horse Camp \\ i.i il n Ipl
23 -i.jt' 4-11 I 'inic Public Spc.,ikin IllutIr.itcd
r lk' L)'iin '.,I I rciiiman i t lil \ al Ineir'n t, 4-11
l Ih irs .ui/ B, 1', I ( .iicl llL, F L
25-26 4-H Hog & Ham Gainesville, FL
28- 4-II LC-i.-ll.Lir I'.Lia,,ci IL
.luI 2
29-30 Risk Management in the Cattle Business: An
Emphasis on Marketing Marianna, FL

8-1)0 Si[ cc 4-11 I1 ,r. Sh l',', l.nilp.i. FL
12-15 National County Agent Convention Orlando, FL
24-25 i|anI i I Icalth i.'ntI 'rI ncii '
26-30 4-H Congress Gainesville, FL
28- '~oiutlILr R '*i. jnal 4-11 II r.' Clhi.jiiinr -luip -
.\ui; 1 Mhnic. L.\
TBA Santa Rosa County Farm Tour Milton, FL

Please visit http://www.animal.ufl.edu/extension/beef/
2004BCSCpics.shtml, to view pictures from the 53rd
Annual Beef Cattle Short Course.

Fifty-third Annual
Beef Cattle Short Course

2004 Beef Cattle Short Course Pictures
* 2004 Beef Cattle Short Course
Aied Industry Trade Show and Reception
* "The Importance of Selenium Nutrition in Today's Beef Production' and Breakfast -
Sponsored by Lakeland Arirna Nutrton and Aitech, Inc.
SDemonsrtratons and Discussions UF/IFAS Beef Teaching Unit Lunch sponsored
by Farm Creout of Central Fonrda
* Cattlemen's Steak Out
SAmerican Breeds Coalition Sponsors of the 2004 BeefCatte Short Course

Return to Main Menu




June 2004

The Insttute of Food and Agricultural Sciences (IFAS) is an Equal Employment Opportunity Affirmatve Action Employer authorized to provide research educational information, and other
services only to individuals that functon with regard to race, color sex, age, handicap, or national origin. For information on obtaining other extension pubhcations, contact your county
Cooperative Extension Service office.

DL PA I, I I L\ 1 0


Beef Management

0 Last date for planting sorghum.
0 Check mineral feeder, use at least 8% phosphorus
in mineral an not over 2 12 to 1 calcium to
phosphorus ratio.
0 Check pastures and hay field for spittlebugs, mole
crickets, and army worms.
0 Treat if necessary; best month for mole cricket
0 Check dust bags.
0 Watch for evidence of pinkeye and treat.
0 Utilize available veterinary services and
diagnostic laboratories.
0 Get heifers vaccinated for brucellosis if not
already done.
0 Pregnancy check cows.
0 Update market information and plans.
0 Make first cutting of hay.
0 Put bulls out June 1 for calves starting March
0 Reimplant calves at 90 to 120 days with growth

0 Cut corn silage.
0 Control weeds in summer pastures.
0 Apply nitrogen to warm season pastures, if
0 Check mineral feeder.
0 Check for army worms and mole crickets, and
treat if necessary.
0 Wean calves and cull cow herd.
0 Watch for evidence offootrot and treat.
0 Consider preconditioning calves before sale
including vaccination for shipping fever and IBR
at least 3 weeks before sale.
0 Check dust bags.
0 Update market information and plans.
0 Revaccinate calves at weaning for blackleg.

0 Treat for liver flukes as close to August 15th as
possible, if they are in your area.
0 Cut hay.



0 Apply lime for fall and winter crops.
0 Harvest Bahiagrass seed.
0 Check mineral feeder.
0 Update market information and marketing plans.
0 Check for army worms, spittlebugs, and mole
crickets, and treat if necessary.
0 Check dust bags.
0 Wean calves and cull cow herd.
0 Watch for evidence of abortions.
0 Observe animals regularly for signs of disease.
0 If cattle grubs were found on cattle last winter or
heel flies were observed in the pasture, treat for
cattle grubs this month.
0 Pregnancy test and cull open heifers from
replacement herd.

Livestock Summary

First quarter beef production is
likely down about 7 percent from a
year earlier, and slaughter is down
over 5 percent, with cow slaughter
down sharply. Poor feeding
conditions are holding down slaughter weights at the
same time beef demand is rising seasonally.
Tight beef supplies, in spite of reduced beef
exports, and strong beef demand continue to result
in higher prices. As the spring barbeque season
begins, supplies and slaughter weights are much
lower than expected.
Typically slaughter weights do not begin to
rise until late April to May and the cool wet conditions
in early April will hold down this seasonal weight
transition. Cow slaughter is expected to remain low,
with the beef sector showing the first feeble steps
toward expansion.
Higher milk prices and tight dairy heifer
supplies are resulting in much lower dairy cow
slaughter than previously expected. First quarter dairy
cow slaughter was down nearly 14 percent from a
year earlier.
Retail meat prices are up sharply as
consumers have become more comfortable with the
growing positive image of meat in diets. Consuming
beef is now seen in a much more positive light than

at any time over the past 15 to 20 years. In addition,
the movement toward higher quality beef has
increased consumer satisfaction.

Unfortunately for much of the past year,
higher quality beef supplies have been very tight with
retail prices well above year-earlier levels. However,
consumers seem very willing to pay the higher prices
fro today's more consistent quality beef. Declining
cattle inventories are going to keep beef supplies tight
and prices strong for the next few years.

Although on feed inventories on March 1
were 4 percent above a year earlier, and marketing
are expected to rise seasonally throughout the
summer, poor feedlot performance continues to hold
back marketing numbers and slaughter weights. This
very tight supply situation places cattle feeders in a
strong negotiating position as the early barbeque
season begins.

Market uncertainties regarding export
markets and new protocols on production and animal
identification programs could restrain expansion
plans and may well impact cattle prices and market
entry for at least some producers. Cattlemen are likely
to remain wary of expansion until forage supplies

FL Egg Value Per Dozen

40 "


1999 2000 2001 2002

The Florida Agri-Journal
Researched by Sherilyn Burris
Information Specialist I
Division of Marketing
Release May 5, 2004



Success for the Fifty-third
Annual Beef Cattle Short

Livestock Trends

Cattle Average Auction Market Value

35 M

1999 2000 2001

Total Live Weight of FL Hog Slaughter



1998 1999 2000 2001

"What a great blend of education and
socialization that enhances the Florida beef industry
team!" One participant having attended nearly all
years, called the Fifty-third Annual Beef Cattle Short
Course the best yet. Not only was attendance at a
long-time high with registered participants, but the
participant evaluations were excellent! The number
of exhibitors for the Trade Show was nearly double
from the last few years. This year's theme,
2002 Management Issues and Industry Challenges in
Defining Times, and program topics resulted from
requests received over the last year from many of
our Florida producers. Wednesday's program focused
on current hot topics affecting the present and future
beef industry, National Animal ID, Country of Origin
Labeling, and BSE. Thursday's program focused on
the value and use of cattle with Bos indicus breeding
from pasture to retail. Sponsored by the American
Breeds Coalition, this session addressed the fact and
2002 fiction of the genetics used in the Gulf Coast region.


The attendance on Friday morning occasionally
decreases from the previous day, however, breakout
sessions on cow supplementation systems for various
regions of Florida attracted large crowds the morning
after the well-attended, Thursday night Steak-Out.
The BCSC target audience consists of beef cattle
managers who are interested in increasing net profit
and willing to make management changes to do so
without endangering the resources at their disposal.
Profitable production, processing, and utilization of
cattle are paramount to the BCSC participants.

SOURCE: Tim Marshall, Professor
University of Florida
Department of Animal Sciences
Gainesville, FL
Release May 18, 2004

July 1, 2004. The overall cost of the test is anticipated
to be similar to last year at $625. Upon receipt of the
nomination, additional information will be sent to
the consignors.
The 2003 test concluded with a successful sale
for those consignors who chose to participate. Sixty-
seven bulls sold for an average price of $2,031. In
reviewing the sale results, one noted fact was that
buyers are paying close attention ofEPD's. Bulls with
below breed average EPD's for growth, or well above
breed average for birth weight were not as actively
sought and their prices fell well below the average
of the sale. This is a performance test and sale, so
consignors should take this into account before
selecting bulls to be placed in the test. This year
should be another opportunity to showcase superior
beef cattle genetics in Florida. Don't miss this
opportunity to see how bulls from your herd compare
with some of the best in the Southeast. By consigning
a bull to the Florida Bull Test, you will also have the
opportunity to participate in one of the highest quality
bull sales in the region.

W Call for
Consignments -
2004 Florida Bull Test

It is now time to plan consignments to the 2004
Florida Bull Test at the University of Florida, North
Florida Research and Education Center, Marianna,
FL. Consignment is open to all breeds and composites
with Expected Progeny Differences. Bulls must be
born between September 1 and December 31, 2003.
Bulls will be gain tested for 112 days. Weight growth,
ultrasound, health and reproduction data will be
gathered throughout the test. Eligible bulls will be
sold at auction at the NFREC Pavilion on Saturday,
January 22, 2005. Bulls will be scheduled to arrive
at the testing facility on July 30-31, will go on
test August 24-25, and complete the test on
December 15-16.
Nomination forms are available by contacting:
Mary Chambliss, North Florida Research and
Education Center, 3925 Highway 71, Marianna, FL
32446-7906, phone: (850) 482-9904 or can be
downloaded from http://flbulltest.ifas.ufl.edu. A
Nomination Form and $50 per head are due by


Doug Mayo, Livestock Agent
Jackson County Extension
Marianna, FL
Release May 4, 2004


Northeast Florida Beef and
Forage Group Presents our
7th Annual Hay Field

Allen Holtzendorf Farm, Bradford County
August 13, 2004

Call your local Extension Office to make your
reservations, in Bradford County call (904) 966-6224.


8:30 am
Registration ($5/person) & Welcome


9:00 am
Demonstrations & Discussions
Forage Storage
Forage Quality & Supplementation
Hay Utilization & Feeding
Anhydrous Ammonia Demo
Perennial Peanut Establishment
Fall Fertilization of Hay Fields
Insects & Their Control

12:00 Noon

1:00 pm
Equipment Demonstrations


From Starke take HWY 100 west to CR 235
(about 14 mile from the New River Bridge) turn right
onto CR 235 and travel approximately 1 1/2 miles to
the New River Volunteer Fire Department. The
educational programs will be around the firehouse
and then field demonstrations will be across CR 235
in a hay field, after lunch.

J N I 0,"W.


;,- Lawtey;

r End
F L O RI :, A
B-1v I i--

IN> fi^ start


__ II

rd-d -dpLAm

Cindy Sanders, Livestock Agent
CB Sanders@ifas.ufl.edu
Alachua County Extension
Gainesville, FL
Release May 4, 2004


Flow Cytometry was 90%
Accurate in Sorting Sperm Into
Male and Female Cells

This Colorado State University study had two
objectives: to determine whether calves produced by
sexed sperm differed from controls, and to what
extent the sex ratio of calves was altered by the sexing
procedure (flow cytometry/cell sorting). Data were
used from 739 calves produced from control sperm
and 1,169 calves produced from sexed sperm.
There were no significant differences between
treatments in gestation length, calving ease, birth
weight, calf vigor, abortion rate, weaning weight, and
calf death rate from birth to weaning. No anatomical
abnormalities were noted for any calves in this study.
The sex ratio of calves from unsexed control
semen was 49.2% male; 50.8% female. Accuracy of
using X (female)-sorted sperm was 87.8% female
calves, and Y (male)-sorted sperm produced 92.1%
male calves. It was concluded that flow cytometry/
cell sorting can be used to preselect calves safety with
approximately 90% accuracy (Tubman et al. 2004.
J. Anim. Sci. 82:1029).

Sire Milk EPDs Were Closely
Related to Production of Their

Oklahoma State University researchers
conducted a long-term study to evaluate the
productivity of daughters of highly proven high and
low Milk EPD Angus and Hereford sires. The high
and low Milk EPD sires differed by 30.0 lb of Milk
EPD. Total cow milk production from 37 to 205 days
and 205-day calf weights were measured for 1,843
cow-calf pairs from 1991 to 2000. High milk EPD
sired cows produced 237.0 lb more total milk than
low milk EPD sired cows. High milk EPD sired cows
weaned 30.4 lb heavier calves than low milk EPD
sired cows. The authors concluded that Milk EPDs
are accurate predictors of progeny performance in
the Angus and Hereford breeds and can be used by
producers as a tool in selection and culling programs





in purebred and commercial beef herds to increase
calf weaning weight (Bounds et al. 2004. Southern
Section, ASAS, Abstract 21).

Effect of Early Weaning on
Replacement Heifer Production

University of Illinois investigators used 64
Simmental x Angus heifer calves to compare the
effects of early versus normal weaning age on
subsequent productivity. Weaning occurred at 89 days
and 232 days of age for early-weaned (EW) and
normal-weaned (NW) heifers, respectively. Early-
weaned heifers were lighter from puberty to breeding.
However, by the time of palpation for pregnancy there
was no difference in body weight. In spite of lighter
pubertal weights, significantly more EW heifers
reached puberty by 8 months of age than did NW
heifers (81.3 vs. 59.4%). Pregnancy rate was also
higher for EW than for NW heifers (90.0% vs.
74.2%). Weaning age of the heifers did not influence
their subsequent milk production nor the performance
of their calves. The authors concluded that early
weaning reduced heifer size until breeding, increased
percentage of replacements cycling at an early age,
and improved pregnancy rate without influencing
milk production (Sexton et al. 2004. Midwestern
Section, ASAS, Abstract 283).

Emerging Issues for Cow Herds

Dr. John Lawrence, Director of the Iowa Beef
Center at Iowa State Univ. recently presented an
excellent review of emerging trends and issues in
the beef industry. Following is a brief summary of
some of the points he made (Lawrence. 2004. Proc.
33rd Annual Combelt Cow-Calf Conf., Ottumwa,
+ Now that USDA has prohibited acceptance of
"downer" cows, producers should rethink
management of cattle that may potentially become
nonambulatory and market them before they begin
to go down hill rather than waiting until they are

+ Value-based or grid marketing will continue its
growth and will likely evolve to include other
attributes. To date, Choice-Select spread has been
the major determinant of grid premiums and
discounts. However, premiums on Yield Grades 1
and 2 are growing and discounts on YG 3.5 will
become more common. The base price may
eventually decline into the YG 2 range. Economics
are driving the trend to higher yielding cattle as the
industry moves to more case-ready beef products.
+ Information on how calves may be expected to
perform in the feedlot has become increasingly
important. In the future, performance in the cooler
will increase in importance as carcass premiums and
discounts increase.
* Information on cow herd health practices will
become more valuable now that we know calf
sickness has a dramatic impact on carcass value as
well as feedlot performance.
+ Special calf sales in which consignors have
common management practices and genetics will
become increasingly popular.
* A national ID system will improve the
opportunity to verify and pass information from seller
to buyer regardless of how cattle are sold.
+ In the past, cow herds needed to retain ownership
of their calves to capture their full value. With proven
performance and traceable data that can be marketed
with the calves, feedyards will be willing to pay closer
to their full value.

Effect of Ractopamine on
Feedlot Performance, Carcass
Traits, and Sensory

Earlier this year, FDA approved the use of a
beta-agonist, ractopamine, as a growth promotant
during the last 28 to 42 days of the finishing period
for feedlot steers and heifers. It is marketed by Elanco
Animal Health under the trade name of OptaflexxTM
It is recommended to be fed at the rate of 200 mg/
head/day for 28 days. A five-trial summary of steers


showed the following improvements over controls:
Live wt. gain, +17.3 lb; dressing percent, +0.3%; hot
carcass wt., 14.1 lb, ribeye area, +0.4 sq. in.; yield
grade score, -0.1. Because there was no change in
dry matter intake, a significant improvement in feed
efficiency was observed. There were no differences
in marbling score or quality grade.
At the recent Southwest Nutrition and
Management Conference, Dr. Aubrey Schroeder
presented the results of a study on shear force and
sensory evaluation of strip loin steaks. When
OptaflexxTM was fed at the recommended level of
200 mg/head/day, there were no changes from
controls in Warner-Bratzler shear force or sensory
evaluation of tenderness, juiciness and flavor.
However, when fed at 300 mg/head/day, there was a
significant change in shear force and sensory
In summary, when fed at the 200 mg level, there
are significant improvements in gain, feed efficiency,
and carcass muscling along with no reductions in
marbling or tenderness (Schroeder, A. 2004.
Southwest Nutrition and Management Conference,
Phoenix, AZ, Feb. 26-27).

Effect of Limit-Feeding on
Performance and Carcass

University of Missouri workers used 84 Angus
steers (835 ib) in a 128-day finishing trial to evaluate
the effect of limit-feeding on feedlot performance
and carcass merit. The treatments consisted of two
diets that were formulated to generate 3.5 lb ADG
according to National Research Council (NRC)
recommendations: 1) ad libitum intake (AL) or 2)
80% of ad libitum intake (80). The two diets delivered
equivalent amounts of net energy and metabolizable
protein per day at the assigned intake levels.
Dry matter intake during the trial averaged 2.8%
and 2.3% for AL and 80 steers, respectively.
Interestingly, steers on the 80 treatment had
significantly better ADG (3.88 vs. 3.64 lb) and feed
efficiency (6.67 vs. 8.33 feed/gain) than AL steers.

However, the two treatments were similar in marbling
score, yield grade, fat thickness, ribeye area, and
incidence of liver abscesses. The authors noted that
feedlot performance was greater for the limit-fed
steers than that predicted by National Research
Council (NRC) models. They concluded that level
of intake did not exert economically relevant effects
on carcass characteristics (Schmidt et al. 2004.
Midwestern Section, ASAS, Abstract No. 261).


Harlan Ritchie, Steven Rust, and
Daniel Buskirk
Beef Cattle Specialists
Michigan State University
East Lansing, MI 48824
Release Spring 2004


,I -

Bronson Takes Action to
Keep Animal Disease
Out of Florida

Florida Agriculture and Consumer Services
Commissioner Charles H. Bronson has filed an
emergency rule to place restrictions on the
importation of animals from states affected with
Vesicular Stomatitis following a confirmed case in
Vesicular Stomatitis is a highly contagious, viral
disease that affects horses, cattle, swine and
occasionally sheep, goats and deer. The virus can also
cause flu-like symptoms in people working with
infected animals. Symptoms on animals include
blister-like lesions in the mouth, on the tongue, lips,
nostrils, hooves and teats. While the virus doesn't
usually kill the animals, it does result in significant
weight loss and milk production loss. It is also
difficult to distinguish between this virus and foot
and mouth disease, a devastating livestock disease
found outside the United States. States and other
countries often impose movement restrictions on
animal from Vesicular Stomatitis affected areas.
The emergency rule was filed with the Florida
Administrative Weekly after Texas reported a case


of the disease on a farm in western Texas with 9
horses and 8 cattle. Texas has already quarantined
the affected premises, prohibiting the export of any
hoofed animals from that area. However, the disease
could turn up in other areas and in an abundance of
caution, the emergency rule will place restrictions
on animal imports into Florida from Texas.

"I'm pleased to see that Texas has taken
immediate action quarantining the impacted area,"
Bronson said. "But the possibility that this disease
could be in other areas makes it imperative that we
have rules in place to prevent the disease from being
imported into Florida."

The emergency rule will require veterinary
inspection from hoofed animals coming from states
affected with Vesicular Stomatitis to have an official
certificate of veterinary inspection stating that they
are free of clinical signs of this disease and have not
been exposed nor located within 10 miles of a
positive premises within the previous 30 days and
that they receive prior permission in order for them
to be imported into Florida. All animals meeting these
requirements will be quarantined upon entry in
Florida for at least 14 days and be re-inspected by a
Department representative and found free of disease
prior to quarantine release.

SOURCE: Florida Department of Agriculture
and Consumer Services
Tallahassee, FL
Release May 26, 2004


Risk Management In
> The Cattle Business:
An Emphasis on

June 29-30, 2004

Day One-June 29, 2004
11:00 AM 1:00 PM Registration
* The Risks That Cattle Producers Face
* So What Price Do I Need? Calculating
Production Costs and Breakeven Prices
* Understanding Cattle Market Cycles and Price
* Using Futures To Predict Cash Feeder Cattle
5:00 PM Adjourn
6:00 PM Supper
* They Stole My Cows!- Live Animal Evaluation
Showing What Cattle Buyers are Looking For
with USDA-AMS Market Grader and Local
Cattle Buyer
8:00 PM Adjourn

Day Two-June 30, 2004
8:15 AM Begin Day 2
* What's a Hedge? The Basics Of Using Futures to
Sell Feeder Cattle
* What's a Put? The Basics of Using
* Put Options to Set a Price Floor
12 Noon Lunch
* Put Options Continued
* Class Exercise Using Cattle Marketing Case
3:00PM Questions & Wrap-up

Program Participants
T.E. Anton, Area Economist, University of Florida

Todd Davis, Extension Farm Management Specialist,
Clemson University
Tim Hewitt, Area Economist, University of Florida
Curt Lacy, Extension Livestock Economist University of
Walt Prevatt, Livestock Marketing Specialist Auburn
Jim Rathwell, Retired Extension Livestock Economist,
Clemson University
Nathan Smith, Extension Peanut Economist University of


North Florida Research Education Center
Marianna, Florida




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