Influence of degree of food restriction, age and time of day on behaviour of broiler breeder chickens

Savory, C.J.; Maros, Katalin

doi:10.1016/0376-6357(93)90122-8

Cited by 107 publications

(49 citation statements)

References 27 publications

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“…In poultry restrictive feeding results in higher levels of locomotor and/or drinking activity compared to ad libitum conditions (HOCKING et al, 1993;SAVORY & MAROS, 1993). In our study we did not find an effect of treatment on either total locomotor, feeding or drinking activity.…”

Section: This Experimentscontrasting

confidence: 72%

Feeding and Growth of Japanese Quail (Coturnix C. Japonica) Chicks With Unpredictable Food Access

Boon¹,

Visser²,

Daan³

1999

Netherlands Journal of Zoology

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We investigated the effect of unpredictable feeding times on feeding activity and body mass gain in fast growing Japanese quail (Cotumix c. japonica) from 7 to 31 d of age. Quail chicks were subjected to a long day length (18L:6D) with ad libitum food during (1) 17.5 h of the light period, starting 0.5 h after lights-on (group A, n = 14), (2) 6 h of the light period, starting 0.5 h after lights-on (group B, n = 14), and (3) 6 h of the light period, starting pseudorandomly either 0.5, 6, or 11.5 h after lights-on (group C, n = 12). We examined the effects on locomotor, feeding and drinking activity, body mass, and food intake. Treatment did not affect daily locomotor, feeding, or drinking activity. Distribution of activity over the light period was affected: group B and C showed more activity above the feeder and water container outside the feeding time, and showed a large bout of locomotor and feeding activity at the start of this period. Both overall weight gain and gross energy intake (GEI) were highest in group A and lowest in group C. Distribution of food intake throughout the daily feeding period was affected: group B and C consumed more food during the first part of the feeding period than group A. Daily GEI in group C was influenced by fasting duration prior to feeding and by time of food availability. We suggest that young quail adjust their feeding behaviour in response to their instantaneous energy needs. This effect is modulated by time of food availability: food arriving later in the day led to higher intake levels.

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Section: This Experimentscontrasting

confidence: 72%

Feeding and Growth of Japanese Quail (Coturnix C. Japonica) Chicks With Unpredictable Food Access

Boon¹,

Visser²,

Daan³

1999

Netherlands Journal of Zoology

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“…In comparable studies, adult pigeons were generally maintained at 75-80% of free-feeding weights for a long period of time (see review by Kacelnik and Bateson 1996). However, at a considerable level of food restriction, chicks did not show any behavioral signs indicative of negative energetic budget, and behavioral abnormalities such as stereotyped pecking at non-food objects were not observed (Savory and Maros 1993).…”

Section: Animalsmentioning

confidence: 99%

Subjective value of risky foods for individual domestic chicks: a hierarchical Bayesian model

Kawamori

Matsushima

2009

Anim Cogn

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For animals to decide which prey to attack, the gain and delay of the food item must be integrated in a value function. However, the subjective value is not obtained by expected profitability when it is accompanied by risk. To estimate the subjective value, we examined choices in a cross-shaped maze with two colored feeders in domestic chicks. When tested by a reversal in food amount or delay, chicks changed choices similarly in both conditions (experiment 1). We therefore examined risk sensitivity for amount and delay (experiment 2) by supplying one feeder with food of fixed profitability and the alternative feeder with high-or low-profitability food at equal probability. Profitability varied in amount (groups 1 and 2 at high and low variance) or in delay (group 3). To find the equilibrium, the amount (groups 1 and 2) or delay (group 3) of the food in the fixed feeder was adjusted in a total of 18 blocks. The Markov chain Monte Carlo method was applied to a hierarchical Bayesian model to estimate the subjective value. Chicks undervalued the variable feeder in group 1 and were indifferent in group 2, but overvalued the variable feeder in group 3 at a population level. Re-examination without the titration procedure (experiment 3) suggested that the subjective value was not absolute for each option. When the delay was varied, the variable option was often given a paradoxically high value depending on fixed alternative. Therefore, the basic assumption of the uniquely determined value function might be questioned.3

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“…Sasongko (1989) Pembibitan broiler komersial membatasi pakan selama pembesaran untuk membatasi kecepatan pertumbuhan (Aviagen, 2001;Mench, 2002;. Pertumbuhan yang cepat dan berat badan tinggi berhubungan dengan kondisi patologis, misalnya ascites, kelemahan, dan kematian, dan hasil reproduksi yang buruk, misalnya hasil telur yang rendah, terjadinya yolk ganda, dan fertilitas rendah (Aviagen, 2001;Mench, 2002;Tolkamp et al, 2005), menyebabkan penderitaan ayam dengan kelaparan selama pembesaran (Savory et al, 1993;Lawrence et al, 2004;Tolkamp et al, 2005). Pembatasan pakan secara kualitatif dapat menghilangkan beberapa tingkah laku abnormal yang berhubungan dengan pembatasan pakan secara kuantitatif (misalnya mematuki sasaran yang bukan pakan) .…”

Section: Pendahuluanunclassified

Pertumbuhan Kompensasi Ayam Betina Hasil Persilangan Antara Ayam Kampung Jantan Dengan Ayam Ras Petelur Betina Yang Mendapat Level Protein Pakan Masa Starter Berbeda

Trisiwi¹

2016

BuletinPeternak

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INTISARIPenelitian ini bertujuan untuk mempelajari pengaruh level protein pakan yang berbeda selama periode starter (0-9 minggu) terhadap pertumbuhan kompensasi (9-12 minggu) pada ayam betina hasil persilangan ayam kampung jantan dan ayam ras petelur betina. Tiga puluh dua ekor ayam betina umur sehari dibagi secara acak menjadi 4 kelompok perlakuan yang berbeda. Selama 9 minggu pertama, setiap kelompok diberi pakan 4 perlakuan yang berbeda: P1 pakan berprotein 21,13%, P2 pakan berprotein 18,71%, P3 pakan berprotein 16,58%, P4 pakan berprotein 14,79%. Pada umur 9 minggu, delapan ayam betina dari setiap kelompok perlakuan dibagi menjadi 4 ulangan. Semua ayam diberi pakan P1 hingga akhir penelitian untuk mendapatkan pertumbuhan kompensasi. Variabel yang diamati adalah konsumsi (pakan, protein, energi), berat badan akhir, pertambahan berat badan, konversi pakan, rasio efisiensi protein, dan rasio efisiensi energi. Data yang diperoleh dianalisis dengan analisis variansi rancangan acak lengkap pola searah, dan perbedaan rerata perlakuan diuji dengan uji Duncan ' s Multiple Range Test. Hasil penelitian menunjukkan bahwa level protein pakan selama periode starter tidak berpengaruh nyata terhadap konsumsi pakan selama periode pertumbuhan kompensasi. Konsumsi pakan P3 dan P4 selama periode starter menghasilkan pertambahan berat badan dan konversi pakan lebih baik selama periode pertumbuhan kompensasi daripada ayam dengan pakan P1. Pertumbuhan kompensasi tertinggi dicapai pada ayam dengan pakan P3 dan penambahan level protein sampai 21,13% (P1) tidak berpengaruh terhadap berat badan akhirnya. Konsumsi protein dan energi berbeda tidak nyata di antara keempat perlakuan pakan, namun rasio efisiensi protein dan energi pada ayam umur 9-12 minggu dengan pakan P3 dan P4 lebih baik daripada ayam dengan pakan berprotein yang lebih tinggi. Kesimpulan penelitian ini penambahan level protein di atas 18,71% pada ayam betina hasil persilangan ayam kampung jantan dan ayam betina petelur tidak berpengaruh nyata dalam meningkatkan pertumbuhan berat badan dan bobot akhir.(Kata kunci: Persilangan ayam kampung, Pertumbuhan kompensasi, Protein pakan) ABSTRACTThe experiment was conducted to examine the effect of various dietary protein levels on compensatory growth period (9-12 weeks)

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Influence of degree of food restriction, age and time of day on behaviour of broiler breeder chickens

Cited by 107 publications

References 27 publications

Feeding and Growth of Japanese Quail (Coturnix C. Japonica) Chicks With Unpredictable Food Access

Feeding and Growth of Japanese Quail (Coturnix C. Japonica) Chicks With Unpredictable Food Access

Subjective value of risky foods for individual domestic chicks: a hierarchical Bayesian model

Pertumbuhan Kompensasi Ayam Betina Hasil Persilangan Antara Ayam Kampung Jantan Dengan Ayam Ras Petelur Betina Yang Mendapat Level Protein Pakan Masa Starter Berbeda

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