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Travis R Whitney

Travis R Whitney
TX A&M AgriLife Research · San Angelo

29.92
 · 
Ph.D.

About

90
Publications
3,313
Reads
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253
Citations
Research Experience
January 2007 - present
Texas A&M University
Position
  • Guest Lecturer
Description
  • Guest Lecturer for "Precision Diet Formulation" class
March 2005 - present
Texas A&M University
Position
  • Texas A&M AgriLife Research
January 2004 - February 2005
Montana State University
Position
Education
January 2001 - January 2004
The University of Arizona
Field of study
  • Beef Cattle Nutrition
September 1997 - December 1999
Texas A&M University
Field of study
  • Agricultural Education and Beef Cattle Production
January 1993 - December 1996
Southwest Texas State University
Field of study
  • Animal Science, Pre-vet

Publications

Publications (90)
Article
The objective of this study was to determine if ruminal fermentation characteristics differed in goat lines selectively bred for high or low consumption of J. pinchotii foliage. Ten Boer × Spanish-composite bucks (age = 2 yr; initial body weight (BW) = 67.2 ± 4.3 kg) previously selected for high (High; n = 5) or low (LOW; n = 5) juniper consumption...
Article
The majority of U.S. lambs are born during late winter or early spring, which can create downstream variability in carcass quality if commercial lamb harvest is to be relatively constant throughout the year. Flavor is an important quality determining characteristic of sheep meat and is influenced, in part, by animal age at harvest. However, managem...
Article
The objective was to determine if rumen microbial characteristics differed in goats selectively bred for greater consumption of Juniperus pinchotii. Ten Boer × Spanish-composite bucks (age = 2 yr; initial BW = 67.2 ± 4.3 kg) previously selected for high (HIGH; n = 5) or low (LOW; n = 5) juniper-consumption, were subjected to three periods: Period 1...
Article
he objective was to evaluate effects of a Juniperus spp.-based finishing diet (JUN) on feedlot performance, carcass characteristics, fatty acid composition, and sensory panel traits of yearling Rambouillet wethers. Thirty wethers (16.8 ± 0.14 mo) were assigned to an 80% concentrate treatment: 20% ground oat hay fed 40 d (JUN0); 20% JUN fed 40 d (JU...
Article
Nutritional characteristics of Juniperus species are now well known and suitability as an abundant, low-cost feedstuff for ruminant animal production is a possibility. Juniperus species produce plant secondary metabolites including condensed tannins (CT) and volatile oils. Maturity of Juniperus species has been shown to affect the concentration of...
Article
Boer × Spanish kid goats (n = 48) were used to evaluate effects of using ground woody products in feedlot diets on growth performance and blood serum chemistry. A completely randomized study design was used with two feeding periods (Period 1 = 70% concentrate, d 0 to 26; Period 2 = 86% concentrate, d 27 to 64). Goats were individually fed 1 of 6 di...
Article
Effects of using ground woody plants in Rambouillet wether lamb (n = 48) feedlot diets on carcass characteristics, adipose tissue fatty acid composition, and sensory panel traits were evaluated. In a randomized design study with 2 feeding periods (Period 1 = fed a 70% concentrate diet from d 0 to 27 d; Period 2 = fed an 86% concentrate diet from d...
Article
Full-text available
This study evaluated effects of ground redberry juniper (Juniperus pinchotii) and urea in dried distillers grains with solubles-based supplements fed to Rambouillet ewe lambs (n = 48) on rumen physiological parameters and bacterial diversity. In a randomized study (40 d), individually-penned lambs were fed ad libitum ground sorghum-sudangrass hay a...
Article
Effects of using ground woody plants in Rambouillet wether lamb feedlot diets on growth performance, blood serum, and rumen parameters were evaluated. A randomized design study was used with 2 feeding periods (70% concentrate diet from d 0 to 27 [Period 1] and 86% concentrate diet from d 28 to 57 [Period 2]); the concentrate portion of the diets ma...
Article
The objective of this research was to evaluate effects of replacing sorghum × Sudangrass hay with ground juniper in gestating ewe supplements on pre- and postpartum growth performance, serum metabolites and hormonal concentrations, milk fatty acid composition, and progeny preweaning performance. In a completely randomized design, commercial Ramboui...
Article
Effects of using ground woody plants in Rambouillet wether lamb feedlot diets on growth performance, blood serum, and rumen parameters were evaluated. A randomized design study was used with 2 feeding periods (70% concentrate diet from d 0 to 27 [Period 1] and 86% concentrate diet from d 28 to 57 [Period 2]); the concentrate portion of the diets ma...
Article
Ground woody products and urea are low-cost roughage and N sources. Rambouillet ewe lambs (n = 48, 6 lambs/treatment; initial BW = 42 kg ± 3.8) were used to evaluate effects of using ground Juniperus pinchotii (juniper) and urea in supplements on feedlot lamb growth traits, blood serum parameters, and fecal characteristics. In a randomized complete...
Article
The objective of this research was to evaluate effects of replacing sorghum × Sudangrass hay with ground juniper in gestating ewe supplements on pre- and postpartum growth performance, serum metabolites and hormonal concentrations, milk fatty acid composition, and progeny preweaning performance. In a completely randomized design, commercial Ramboui...
Presentation
Determine what percentage of ground juniper that can economically be used in steer feedlot diets
Presentation
Full-text available
Ground redberry juniper and urea in DDGS-based supplements do not adversely affect ewe lamb rumen microbial communities. Link to video: https://videos.files.wordpress.com/B06295hN/ishaqetal_lamb_jam2016.mp4
Article
Full-text available
Rising feed costs and recurring feed shortages necessitate the investigation into alternative and underutilized feed resources. Nutritional characteristics of species are either unknown or limited to leaves and ground material from small stems. Therefore, the objective was to quantify nutritional characteristics, 48-h true IVDMD (tIVDMD), microbial...
Article
We hypothesized that ground juniper and dried distillers grains with solubles (DDGS) fed to lambs would have no negative effects on end products. Lambs were individually fed diets containing mainly sorghum grain and oat hay (control) or DDGS-based diets consisting mainly of DDGS, sorghum grain, and oat hay (0JUN), or 33% (33JUN), 66% (66JUN), or 10...
Article
Effects of using ground redberry juniper and dried distillers grains with solubles (DDGS) in Rambouillet lamb (n = 45) feedlot diets on growth, blood serum, fecal, and wool characteristics were evaluated. In a randomized design study with 2 feeding periods (Period 1 = 64% concentrate diet, 35 d; Period 2 = 85% concentrate diet, 56 d), lambs were in...
Article
Objectives of this study were to determine if a redberry juniper-based diet can reduce fecal egg counts (FEC) and increase ivermectin (IVM) efficacy in IVM-resistant Haemonchus contortus. Predominant genera present were Haemonchus (range 45-100%) and Trichostrongylus (range 0-47%). The FEC reduction for IVM in the ewe flock was 25% (95% confidence...
Article
A modified larval migration inhibition assay was used to determine if redberry juniper (Juniperus pinchotii Sudw.) can reduce Haemonchus contortus in vitro motility and increase ivermectin (IVM) efficacy. Ruminal fluid was mixed with buffer solution and either no material (CNTL) or Tifton 85 Bermudagrass hay (T85), dried juniper (DRY), fresh junipe...
Article
Full-text available
In an effort to identify a forage legume with condensed tannins (CT) that reduce gastro-intestinal nematodes (GIN) in small ruminants without negative effects on nutrition, this trial looked at the effects of two legumes containing CT on average daily gain (ADG) and fecal egg counts (FEC) in kid goats. Lespedeza cuneata (sericea lespedeza, SL) and...
Article
Full-text available
Four mature, ruminally cannulated wether goats (Boer × Spanish) were arranged in a 4 × 4 Latin square design experiment and consecutively assigned to one of four complete isonitrogenous and isoenergetic pelleted treatment rations with 0, 6.6, 13.2, or 20% DDG. Alfalfa and cottonseed hulls (CSH) were incubated in situ for 0, 4, 8, 16, 24, 48 and 96...
Article
Leaf secondary compounds were examined in browsed and non-browsed Juniperus ashei trees to identify selective browsing patterns by goats and deer. Analysis of volatile leaf oils (terpenoids) revealed that the browsed trees were lower in total oil than non-browsed trees (2.18 vs. 3.46%, DW basis). Extractable and fiber-bound condensed tannins (CT) w...
Article
Effects of replacing cottonseed hulls with juniper leaves on end products were investigated in lambs. Lambs were individually fed diets containing cottonseed hulls (CSH), half of the CSH replaced by juniper (CSHJ), or all the CSH replaced by juniper (JUN). Lambs grew the same amount of wool when measured as greasy fleece (P>0.19), clean fleece (P>0...
Article
The Penn State particle separator (PSPS) was used to determine if molasses can reduce sorting of ground juniper when juniper is used as a feed intake limiter for lambs. Rambouillet wether lambs (n=21) were fed ad libitum treatments in the morning that consisted of coarse-ground juniper material, dried distillers grains with solubles (DDGS), and eit...
Article
Full-text available
Native warm-season grasses have the potential to provide summer grazing because of their adaptation and persistence. Little nutritive value information is available, however, on the effects of maturity and soil amendments for native North American warm-season grasses during establishment. Multi flower false rhodesgrass (Chloris pluriflora E. Fourn....
Article
Full-text available
Redberry juniper (Juniperus pinchotii Sudw.) is a common invasive plant species in west-central Texas. Goats will consume redberry juniper, but intake is limited by monoterpenoids found in the plant. Previous research has shown that goats will increase juniper intake through 1) conditioning and 2) protein supplementation. This study compared intake...
Article
Anthelmintic effects of plant secondary compounds may be occurring in the rumen, but in vitro larvae migration inhibition (LMI) methods using rumen fluid and forage material have not been widely used. Forage material added to an in vitro system can affect rumen pH, ammonia N, and volatile fatty acids, which may affect larvae viability (LV). Validat...
Article
Full-text available
Effects of percentage of roughage on growth, serum urea N, NEFA, and IGF-1 concentrations and wool, carcass, and fatty acid (FA) characteristics were investigated in Rambouillet wether lambs (n = 33). Lambs were individually fed ad libitum pelleted diets for 98 d containing 40% dried distillers grains and other ingredients, with 10% (CSH10), 20% (C...
Article
Full-text available
The invasive plant species, Spotted knapweed (Centaurea maculosa Lam.) and common tansy (Tanacetum vulgare L.), are altering native rangeland communities in western North Amer-ica (Tyser and Key, 1988; Jacobs, 2008). To increase our under-standing of why sheep consume these species to a certain extent and cattle avoid them, in vitro dry matter dige...
Article
Full-text available
Effects of replacing cottonseed hulls with dry redberry juniper leaves on performance and serum NEFA, urea N, and IGF-1 were investigated in Rambouillet lambs (n = 24, initial BW = 28.6 +/- 4.94 kg). In a study with 2 feeding periods (period 1 = 65% concentrate ration, 28 d; period 2 = 85% concentrate ration, 49 d), lambs were individually fed ad l...
Article
Full-text available
Effects of replacing cottonseed meal (CSM) with corn dis-tillers dried grains (DDG) on growth, wool, and serum NEFA, urea N (SUN), and IGF-1 concentrations were investigated in Rambouillet wether lambs. Lambs (n = 44) were individually fed ad libitum diets for 84 d containing DDG that replaced 0 percent (0DDG), 33 percent (33DDG), 66 percent (66DDG...
Article
Full-text available
Mature Dorper and Rambouillet ewes were maintained together for 2 years in a range environment to evaluate their nutritional status before and during gestation. During Years 1 and 2, nutritional status of mature Dorper (n = 46 and 71, respectively) and Rambouillet (n = 33 and 81, respectively) ewes were evaluated during pre-(August), mid-(late Octo...
Article
The spread of the invasive, Eurasian spotted knapweed (Centaurea maculosa Lam.) across the northwestern United States would be reduced if livestock regularly consumed it. We determined if white-face yearling ewes (n = 36) conditioned for 12 days to fresh-cut spotted knapweed, with or without molasses, would increase their use of it during a 5-day f...
Article
Spotted knapweed (Centaurea maculosa Lam.) is an invasive plant that alters species composition and grazing value of rangelands in the northwestern United States. The spread of invasive plants may be reduced by using livestock as a biological control. We determined if mature ewes and their lambs (n=34ewe/lamb pairs) consume more spotted knapweed wh...
Article
Early-weaned crossbred steers (n = 33; initial BW = 106 ± 7.6 kg; average age at weaning = 132 d) were used to evaluate effects of protein supplementation of forage diets vs. a 70% concentrate diet fed during a backgrounding phase (d 0 to 84) on performance, metabolic profiles, and febrile response to an infectious bovine herpesvirus-1 (BHV-1) chal...
Article
Full-text available
AbstractEffects of early weaning calves on serum metabolites and hepatic insulin-like growth factor-1 messenger RNA (IGF-1 mRNA) of first-calf heifersor mature cows was investigated. Treatments were arranged in a 2 x 2 factorial and included 14 crossbred first-calf heifers and 14 crossbred maturecows assigned randomly to one of two treatment regime...
Article
This experiment investigated the effects of dietary urea fed at 0, 0.5, 1.0 or 1.5% [dry mater (DM) basis] of the diet on systemic acid-base balance in feedlot steers. Results indicated that increasing urea concentrations in feedlot diets had no effect on arterial pH, blood gas profile, serum urea nitrogen, or urine pH.
Article
This study investigated effects of early weaning calves in first-calf heifers and mature cows in terms of performance and metabolic indices. Treatments were arranged in a 2 x 2 factorial and included 14 crossbred first-calf heifers and 14 crossbred mature cows assigned randomly to one of two treatment regimens: early-weaned (EW, calves weaned at an...

Questions and Answers

Question & Answers (8)
Question
Juniperus plant species contain condensed tannins. We've done a lot of work with total CT, etc., but I've not been able to find anyone who's analyzed the MW of them.

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Projects

Project (1)
Project
Woody plant species such as Juniperus spp. and Prosopis spp. are encroaching and destroying rangelands; not only in Texas, but in the U.S. and throughout the world. Managing these plants is expensive and generally cost-inhibitive. Thus, attempts have been made to supplement management costs by adding commercial value to these woody plants; however, very few attempts have succeeded and their success has been on a limited scale. A 100-year history of using ground woody plants in livestock diets exists. Thus, the Texas A&M AgriLife Research Program has been building on this knowledge over the past 10 years and has proven that ground Juniperus spp. and Prosopis spp. can effectively be used as a roughage component in livestock supplements and feedlot diets. A final ground Juniperus product is very cost-competitive with numerous other roughages; approximately $80/ton (FOB). Ground woody plants have unique characteristics not shared by any other livestock feed ingredient in existence: *requires no inputs by man to grow; e.g., land cultivation, planting, irrigated water, fertilizer, pesticides, or herbicides *when harvested, can concurrently enhance natural resources, increase forage production, and enhance land value; increase water availability; and reduce the risk of wildfires *available year-around *not subjected to seasonal pricing characteristics and availability