scholarly journals Effects of Feeding Time on the Feeding Behavior of Laying Hens

1986 ◽  
Vol 57 (4) ◽  
pp. 324-328
Author(s):  
Toshio TANAKA ◽  
Tadashi YOSHIMOTO
Keyword(s):  
Feeding Behavior ◽  
Laying Hens ◽  
Feeding Time

scholarly journals Trehalose and glucose levels regulate feeding behavior of the phloem-feeding insect, the pea aphid Acyrthosiphon pisum Harris

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Guang Wang ◽  
Jing-Jiang Zhou ◽  
Yan Li ◽  
Yuping Gou ◽  
Peter Quandahor ◽  
...  
Keyword(s):  
Feeding Behavior ◽  
Growth And Development ◽  
Acyrthosiphon Pisum ◽  
Pea Aphid ◽  
Feeding Time ◽  
Electrical Penetration Graph ◽  
Glucose Content ◽  
Glucose Levels ◽  
Phloem Feeding ◽  
Trehalose Content

AbstractTrehalose serves multifarious roles in growth and development of insects. In this study, we demonstrated that the high trehalose diet increased the glucose content, and high glucose diet increased the glucose content but decreased the trehalose content of Acyrthosiphon pisum. RNA interference (RNAi) of trehalose-6-phosphate synthase gene (ApTPS) decreased while RNAi of trehalase gene (ApTRE) increased the trehalose and glucose contents. In the electrical penetration graph experiment, RNAi of ApTPS increased the percentage of E2 waveform and decreased the percentage of F and G waveforms. The high trehalose and glucose diets increased the percentage of E2 waveform of A. pisum red biotype. The correlation between feeding behavior and sugar contents indicated that the percentage of E1 and E2 waveforms were increased but np, C, F and G waveforms were decreased in low trehalose and glucose contents. The percentage of np, E1 and E2 waveforms were reduced but C, F and G waveforms were elevated in high trehalose and glucose contents. The results suggest that the A. pisum with high trehalose and glucose contents spent less feeding time during non-probing phase and phloem feeding phase, but had an increased feeding time during probing phase, stylet work phase and xylem feeding phase.

PSVI-20 Extent of genetic variation in feeding behavior and genetic associations with performance and feed efficiency in crossbred growing cattle

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 233-234
Author(s):  
David N Kelly ◽  
Roy D Sleator ◽  
Craig P Murphy ◽  
Stephen B Conroy ◽  
Donagh P Berry
Keyword(s):  
Genetic Variation ◽  
Feeding Behavior ◽  
Energy Intake ◽  
Feed Efficiency ◽  
Fixed Effects ◽  
Feeding Rate ◽  
Feeding Time ◽  
Genetic Associations ◽  
Event Duration ◽  
Growing Cattle

Abstract To the best of our knowledge, the genetic variability in feeding behavior, as well as relationships with performance and feed efficiency, has not been investigated in a cattle population of greater than 1,500 animals. Our objective was to quantify the genetic parameters of several feeding behavior traits, and their genetic associations with both performance and feed efficiency traits, in crossbred growing cattle. Feed intake and live-weight data were available on 6,088 bulls, steers and heifers; of these, 4,672 cattle had backfat and muscle ultrasound data, and 1,548 steers and heifers had feeding behavior data. Genetic (co)variance parameters were estimated using animal linear mixed models; fixed effects included test group, heterosis, recombination loss, dam parity, age in months at the end of test, and the two-way interaction between age in months at the end of test and sex. Heritability was estimated to be 0.51 (0.097), 0.61 (0.100), 0.44 (0.093), 0.48 (0.094), and 0.47 (0.095) for feed events per day, feeding time per day, feeding rate, feed event duration, and energy intake per feed event, respectively. Coefficients of genetic variation ranged from 0.11 (feeding time per day) to 0.22 (feed event duration). Genetically heavier cattle with a higher energy intake per day, and faster growth rate, had a faster feeding rate and a greater energy intake per feed event. Genetic correlations between feeding behavior and feed efficiency were generally not different from zero, however, there was a genetic correlation of 0.36 (0.11) between feeding time per day and residual energy intake. Significant heritable and exploitable genetic variation exists in several feeding behavior traits in crossbred growing cattle which are also correlated with several performance traits. As some feeding behavior traits may be relatively less resource intensive to measure, they could be useful as predictor traits in beef cattle genetic evaluations.

scholarly journals Feeding behavior of lambs fed castor mealom farelo de mamona

2016 ◽  
Vol 37 (3) ◽  
pp. 1451 ◽  
Author(s):  
Hellenn Cardoso Oliveira ◽  
Rasmo Garcia ◽  
Vitor Visintin Silva de Almeida ◽  
Aline Cardoso Oliveira ◽  
Aureliano José Vieira Pires ◽  
...  
Keyword(s):  
Feeding Behavior ◽  
Soybean Meal ◽  
Feed Efficiency ◽  
Dry Matter ◽  
Feeding Activity ◽  
Experimental Period ◽  
Feeding Time ◽  
Adaptation Period ◽  
Four Levels ◽  
Castor Meal

The experiment aimed to evaluate the feeding behavior of Santa Inês lambs fed diets containing different levels of detoxified castor meal in the concentrate. Twenty-four sheep with an average body weight of 18.5± 2.26 kg, at four months of age, were distributed in a randomized complete design with four treatment and six replications. Treatments consisted of four levels of castor meal (0, 33, 67, and 100%) replacing soybean meal. Animals underwent a 15-day adaptation period and an experimental period of 84 days. The diet was composed of 60% sugarcane silage and 40% concentrate, on a dry matter basis. Animal behavior (idle, rumination, and feeding activities) were observed visually for two 24-h periods with 5-min intervals, and recorded. The number of rumination chews and the time taken to ruminate each cud per day were counted using a digital stopwatch. Dry matter (DM) intake was not affected by inclusion of castor meal in the concentrate, averaging 884.02 g day?1. The feeding activity was not affected by addition of castor meal. Rumination time increased linearly, whereas the idle and rumination times decreased linearly with addition of castor meal. Feeding time, expressed in min per kg of DM and NDF, was not influenced by the inclusion of the meal in the diet, averaging 373.3 and 880.0 min, respectively. The number of chews and the time taken to ruminate each cud were not changed by inclusion of castor meal in the diet. Feed efficiency, expressed in grams DM and NDF per hour, was not influenced by castor meal inclusion in the diet. Rumination efficiency expressed in g DM h?1 decreased, but was not affected when expressed in g NDF h?1. Total replacement of soybean meal by castor meal in the concentrate does not affect the feeding time or feed efficiency of feedlot sheep, but leads to a small reduction of their rumination efficiency. Thus, we recommend the inclusion of castor meal in sheep diets at the levels tested in this study.

scholarly journals Calcium particle size and feeding time influence egg shell quality in laying hens

2019 ◽  
Vol 41 (1) ◽  
pp. 42926
Author(s):  
Aliasghar Saki ◽  
Abbas Rahmani ◽  
Azam Yousefi
Keyword(s):  
Particle Size ◽  
Laying Hens ◽  
Feeding Time ◽  
Shell Quality ◽  
Egg Shell

Comparative Agonistic and Feeding Behavior of Hatchery-Reared and Wild Salmon in Aquaria

1968 ◽  
Vol 25 (1) ◽  
pp. 1-14 ◽  
Author(s):  
Owen C. Fenderson ◽  
W. Harry Everhart ◽  
Kenneth M. Muth
Keyword(s):  
Social Interaction ◽  
Atlantic Salmon ◽  
Feeding Behavior ◽  
Salmo Salar ◽  
Social Dominance ◽  
Food Preference ◽  
Feeding Rate ◽  
Feeding Time ◽  
Feeding Rates ◽  
Wild Salmon

When hatchery-reared and wild landlocked Atlantic salmon (Salmo salar) parr of the same age and size were permitted to compete for social dominance and for food in aquaria, twice as many hatchery salmon attained dominance as wild salmon. Dominant hatchery salmon also showed a higher intensity of aggressiveness than dominant wild salmon, displaying a higher and more variable mean nipping rate. Socially dominant salmon ate more food per fish than subordinates, but there were no statistically significant differences in feeding rate between dominant hatchery and dominant wild salmon, or between subordinate hatchery and subordinate wild salmon.Hatchery salmon displayed lower feeding rates than wild salmon when they were held in separate compartments of an aquarium and compared at three temperatures. This difference in feeding rate probably was not a reflection of differences in adaptation to temperature or food preference, but, rather, was the result of interference with feeding caused by the more intense social interaction among hatchery fish.It is suggested that high levels of aggressiveness may contribute to mortalities of hatchery-reared salmon planted in streams because of loss of feeding time, excessive use of energy, and increased exposure to predators.

scholarly journals Feeding behavior of crossbred pigs reared intensively in Southeastern Nigeria.

2021 ◽  
Vol 37 (2) ◽  
pp. 271-278
Author(s):  
B. I. Odo ◽  
S. O. Alaku ◽  
B. U. Ekenyem
Keyword(s):  
Feeding Behavior ◽  
Animal Behavior ◽  
Feeding Time ◽  
Feeding Behaviors ◽  
Southeastern Nigeria ◽  
Normal Behavior ◽  
Significant Difference ◽  
Courtship Behaviors ◽  
Crossbred Pigs

 The in situ feeding behavior of pigs was studied for a period of 18 weeks using 3 different but clinically healthy crossbred pigs of varying genotypes. Results showed that there was no marked difference in the pre-feeding, feeding and post-feeding behaviors of the different hybrids used. Observation of feeding behavior showed that all animals fed (picked feed) very intensively during the first 35 minutes of introduction of feed Other activities observed include playing/bullying drinking wallowing, social and courtship behaviors. Rooting and other behaviors like climbing of pen walls were also observed There was no significant difference (P>O.05) in time spent during ingestion (picking of feed) between LW x LC and LC x L crosses. However there was significant difference (P< O. 05) in time spent during ingestion between LWxLC with LWxL crosses, and LCxL with LWxL crosses The total feeding time was slightly higher O. 05) in LWxL than, either of the Other groups. Rooting time was slightly lower in LWx L crosses than in any other group. Total time spent on other major activities like drinking wallowing, playing/ bullying, social/courtship behaviors was slightly higher (P < 0.05) in LWxLC and LWxL than LWxLC crosses. Knowledge of animal behavior is important for improved productivity as well as animal welfare since q deviation from the normal behavior is an indication of ill health.

scholarly journals Поведение ленского осетра Acipenser baerii, Brandt при использовании нового типа корма

2020 ◽  
Author(s):  
E.G. Skvortsova ◽  
Yu.S. Utkina ◽  
A.S. Demidova
Keyword(s):  
Feeding Behavior ◽  
Feed Rate ◽  
Short Range ◽  
Feeding Time ◽  
Fish Feed ◽  
Acipenser Baerii ◽  
Food Object ◽  
Range Search ◽  
New Type ◽  
Type Factor

Ставилась задача исследовать влияние типа корма на пищевое поведение молоди ленского осетра, оценить поведение особей в фазе ближнего поиска и обнаружения пищевого объекта. Исследования проводили методом периодов на одной группе рыб, 5 экземпляров. Было установлено, что пищевой поиск нового типа корма исследуемые особи прошли успешно: пищевой объект удерживался рыбой после первого схватывания. К концу опытов при кормлении рыбы гидролизатом продолжительность латентного времени питания снижалась, что свидетельствует о процессах привыкания к новому типу корма. При кормлении гидролизатом за три дня эксперимента латентное время питания сократилось на 13 пунктов. При кормлении же комбикормом продолжительность латентного времени питания, наоборот, увеличилась в 2,2 раза. Время, проведённое на кормовом пятне молодью ленского осетра контрольной и опытной групп, также было различным. Частички комбикорма рыбы съедали быстрее, чем гидролизат. В целом по эксперименту наибольшее влияние фактор тип корма оказывает на скорость питания (5,86). Рацион питания практически не зависит от типа корма.The task was to investigate the influence of the type of feed on the feeding behavior of juvenile Lena sturgeon, to evaluate the behavior of individuals in the phase of short-range search and detection of a prey. The researches were conducted by the method of periods on one group of fish with 5 specimens. It was found that the food search for a new type of food was successful in individuals under investigation: the food object was held by fish after the first grasping. By the end of the experiments when feeding a fish with a condensed fish solubles the duration of latency feeding time has decreased which indicates the processes of getting used to the new type of food. When fed with a condensed fish solubles for three days of the experiment the latency feeding time was reduced by 13 points. When feeding with complete feed the duration of latent feeding time on the contrary has increased in 2.2 times. The time spent on the fodder spot by the juvenile Lena sturgeon of the control and experimental groups was also different. Particles of fish feed were eaten faster than the condensed fish solubles. On the whole of the experiment the feed type factor has the greatest influence on the feed rate (5.86). The diet is almost independent of the type of feed.

scholarly journals Feeding behavior of lambs fed diets containing peach palm meal

2016 ◽  
Vol 37 (3) ◽  
pp. 1629 ◽  
Author(s):  
Alana Batista dos Santos ◽  
Mara Lúcia Albuquerque Pereira ◽  
Herymá Giovane De Oliveira Silva ◽  
Taiala Cristina De Jesus Pereira ◽  
Leandro Sampaio Oliveira Ribeiro ◽  
...  
Keyword(s):  
Body Weight ◽  
Feeding Behavior ◽  
Dry Matter ◽  
Control Diet ◽  
Feeding Time ◽  
Initial Body Weight ◽  
Peach Palm ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Feedlot Lambs

The aim of this study was to evaluate the feeding behavior of lambs fed diets containing peach palm meal replacing maize (0, 10, 40, 60, and 85% DM). Thirty Santa Inês sheep with an average initial body weight of 21.6 ± 0.87 kg were distributed in a completely randomized design with five diets and six replicates. Feeding time in min kg–1 DM and min kg–1 NDFap increased by 34 min and 99.6 min, respectively, with each level of substitution of maize for the peach palm meal. Rumination and chewing times, in min kg–1 DM and min kg–1 NDF, also increased in response to the substitution of maize for peach palm meal. When expressed in min day–1, rumination and chewing activities decreased by 12.4 and 14.6 min, respectively, as the amount of peach palm meal in the concentrate was increased. The time spent idle increased linearly (P &lt; 0.05), by 14.6 min day–1, with the replacement levels, compared with the control diet. Peach palm meal in the composition of sheep diets reduces the intakes of dry matter and fiber and decreases the feed and rumination efficiencies. Replacing maize by peach palm meal increases the feeding time and rumination and chewing activities of feedlot lambs.

scholarly journals Feeding behavior of sheep fed diets with Elaeis guineensis palm kernel meal

2016 ◽  
Vol 37 (4Supl1) ◽  
pp. 2513
Author(s):  
Bianca Damasceno Pinho ◽  
Aline Fernanda Oliveira Ramos ◽  
José De Brito Lourenço Júnior ◽  
Cristian Faturi ◽  
André Guimarães Maciel e Silva ◽  
...  
Keyword(s):  
Feeding Behavior ◽  
Elaeis Guineensis ◽  
Daily Intake ◽  
Palm Kernel ◽  
Idle Time ◽  
Corn Silage ◽  
Neutral Detergent Fiber ◽  
Feeding Time ◽  
Kernel Meal ◽  
Palm Kernel Meal

In order to evaluate the feeding behavior of sheep fed with diets containing different levels of palm kernel meal (PKM) substituted for corn silage, a metabolic assay was performed on 20 ewes (5 treatments × 4 replicates) over 25 d. The animals received corn silage diets with the addition of increasing levels of PKM (0, 15, 30, 45, and 60%). The following parameters were evaluated: dry matter (DM) intake, neutral detergent fiber (NDF) intake, feeding time, rumination time, idle time, number of merycism mastications per bolus, time spent ruminating each bolus, DM and NDF per bolus, number of ruminated boluses per day, feeding and rumination efficiency, total chewing time, and number of merycism mastications per day. The daily intake of both DM and NDF increased linearly (P &lt; 0.05), and when sheep were fed diets of at least 43.18 and 39.15% PKM, respectively, the consumption values were significantly different than when sheep were fed diets with 0% PKM (P &lt; 0.05). In contrast, feeding time declined linearly, and in response to diets with at least 28.05% PKM, the sheep exhibited significantly different feeding times from those of sheep fed 0% PKM, with a reduction of 0.0613 percentage points per 1% increase in PKM. Idle time, rumination time, and rumination time per bolus each exhibited quadratic responses (P &lt; 0.05), and the minimum rumination time per bolus was 44.37 s with 35.19% PKM. A quadratic response was also observed for total chewing time and both measures of merycism mastications (P &lt; 0.05). Therefore, we concluded that the inclusion of PKM in the diets of sheep improves some parameters of feeding behavior, and the use of PKM is recommended at DM percentages of up to 40%.

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