Relationship between feeding behavior and performance of feedlot steers fed barley-based diets12

This experiment aimed to describe the effects ofOreganoextract (OE) inclusion into the concentrate fed to dairy heifers on physiological parameters, feeding behavior, intake, and performance. Thirty-two Holstein heifers were randomly distributed into four treatments: C = control, without addition of OE; OE2.5 = 2.5 g; OE5.0 = 5.0 g and OE7.5 = 7.5 g ofOreganoextract per heifer/day. Feeding behavior and concentrate intake were assessed individually every day and total dry matter intake (DMI) was determined on the last week of the trial. Compared to control group, OE7.5 reduced by 32% the latency time to approach the feed bunk but increased by 6% the time spent eating the concentrate. Each inclusion of 2.5 grams of OE into the concentrate increased the occurrence of postingestive licking the feed bunk with abundant saliva production 1.2 times (P<0.01) and tended to increase the occurrence of sneeze events 1.2 times (P<0.10). No statistical difference was detected between treatments for total DMI, but concentrate DMI was 9% lower for OE7.5 when compared to control and OE2.5. The inclusion of 7.5 grams/day of OE causes small but negative effects in feeding behavior and concentrate intake, without change on total dry matter intake.

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Radio frequency technology to measure feeding behavior and health of feedlot steers

Applied Animal Behaviour Science ◽

10.1016/s0168-1591(98)00110-5 ◽

1998 ◽

Vol 59 (4) ◽

pp. 277-284 ◽

Cited By ~ 58

Author(s):

B.F. Sowell ◽

J.G.P. Bowman ◽

M.E. Branine ◽

M.E. Hubbert

Keyword(s):

Radio Frequency ◽

Feeding Behavior ◽

Feedlot Steers

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Effects of three novel resistant black raspberry selections on Amphorophora agathonica feeding behavior and performance

Arthropod-Plant Interactions ◽

10.1007/s11829-015-9390-z ◽

2015 ◽

Vol 9 (5) ◽

pp. 487-496 ◽

Cited By ~ 1

Author(s):

D. Lightle ◽

M. Dossett ◽

T. Ebert ◽

C. E. Finn ◽

R. R. Martin ◽

...

Keyword(s):

Feeding Behavior ◽

Black Raspberry ◽

And Performance ◽

Amphorophora Agathonica

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Location, location, location: Feeding site affects aphid performance by altering access and quality of nutrients

PLoS ONE ◽

10.1371/journal.pone.0245380 ◽

2021 ◽

Vol 16 (2) ◽

pp. e0245380

Author(s):

Vamsi J. Nalam ◽

Jinlong Han ◽

William Jacob Pitt ◽

Shailesh Raj Acharya ◽

Punya Nachappa

Keyword(s):

Feeding Behavior ◽

Negative Impact ◽

Electrical Penetration Graph ◽

Soybean Aphids ◽

Whole Plant ◽

Leaf Surfaces ◽

Aphid Feeding ◽

And Performance ◽

Plant Assays

Aphid feeding behavior and performance on a given host plant are influenced by the plants’ physical and chemical traits, including structural characters such as trichomes and nutritional composition. In this study, we determined the feeding behavior and performance of soybean aphids (Aphis glycines) on the stem, the adaxial (upper), and the abaxial (lower) leaf surfaces during early vegetative growth of soybean plants. Using the electrical penetration graph technique, we found that aphids feeding on the stem took the longest time to begin probing. Once aphids began probing, the sieve elements were more conducive to feeding, as evidenced by less salivation on the stem than either leaf surface. In whole-plant assays, stems harbored higher aphid populations, and aphids had shorter development time on stems than the adaxial and the abaxial leaf surfaces. We compared trichome density and length on the stem, the adaxial, and the abaxial leaf surfaces to investigate whether plant trichomes affected aphid feeding and performance. There were higher density and longer trichomes on stems, which likely resulted in aphids taking a longer time to probe. Still a negative impact on aphid population growth was not observed. Analysis of phloem sap composition revealed that vascular sap-enriched exudates from stems had higher sugars and amino acids than exudates from leaves. In artificial diet feeding assays, the population of aphids reared on a diet supplemented with stem exudates was higher than on a diet supplemented with leaf petiole exudates which is in agreement with results of the whole-plant assays. In summary, our findings suggest that the performance of soybean aphids on a specific plant location is primarily driven by accessibility and the quality of phloem composition rather than structural traits.

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Yeast culture in the diet of feedlot steers: performance, carcass traits and feeding behavior

Arquivo Brasileiro de Medicina Veterinária e Zootecnia ◽

10.1590/1678-4162-11148 ◽

2020 ◽

Vol 72 (2) ◽

pp. 535-544

Author(s):

M. Neumann ◽

A.M. Souza ◽

E.H. Horst ◽

R.C. Araujo ◽

B.J. Venancio ◽

...

Keyword(s):

Feeding Behavior ◽

Control Diet ◽

Carcass Traits ◽

Ingestive Behavior ◽

Daily Weight Gain ◽

Yeast Culture ◽

Apparent Digestibility ◽

Forage Maize ◽

Feedlot Steers ◽

Peripheral Temperature

ABSTRACT This study aimed to evaluate the performance, apparent digestibility of diet, ingestive behavior which occurred in two moments, carcass traits, being evaluated constituent and non-carcass components, and also the effect the yeast culture could promote in the peripheral temperature of rumen, hull and body temperature. The diets consisted of a constant ratio of 50% forage (maize silage) and 50% concentrate. Thirty-six steers, ½ Angus Nelore, with average age of 11 months and average initial body weight of 339.5±10kg were used in the experiment. The inclusion of yeast culture promoted a higher daily dry matter intake (8.83 vs 9.35kg day-1) and, consequently, a better daily weight gain (1,143 vs. 1,325kg day-1) in the initial feedlot phase, with no difference in other periods. The apparent digestibility of the diet containing yeast culture was higher than the control diet (69.69 versus 68.32%, respectively), and its use did not interfere with the feeding behavior of the animals. Based on our findings, supplementation with yeast culture may bring positive results in the initial feedlot phase.

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