Ahemeral lighting and reproductive efficiency in breeding flocks

Shanawany, M. M.

doi:10.1079/wps19930019

Cited by 10 publications

(4 citation statements)

References 26 publications

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“…This improvement might due to the role of stepup light regimen for activating the thyroid gland to secrete thyroid hormone (T4), which is the most important hormone linked with hatchability. Our results are in agreement with results of Shanawany(1993) who noted that fertility and hatchability improved by Step-Up Photoperiod regimen (SUP) in domestic fowl. Moreover, El-Prollosy (2006) reported that exposing of Gimmizah pullets to SUP regimen during 6-22 wk of age improved fertility and hatchability compared with other photoperiod regimens.…”

Section: Hatching Traitssupporting

confidence: 92%

Effect of Lighting Regimens and Dietary Iodine Sources on Productive and Reproductive Performance for Mandarah Chicken Strain

Iraqi

2020

EPSJ

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The objective of the present experiment was to examine the effect of lighting regimens, iodine sources and levels and their interactions on productive performance, hatching traits, some biochemical blood parameters and thyroid hormones of Mandarah chickens. A total of 400 Mandarah chicks at 8 weeks of age were housed in closed system house and divided randomly into two equal groups (200 chicks / group). Chicks of the first group were exposed toStep-Up Photoperiod (SUP): The photoperiod was increased gradually from 10 h/d at 8 wks of age by half an hour each wk to reach 16 h/d at 20 wk of age (Lr1), Chicks of the second group were exposed to Constant-Step Up Photoperiod (C-SUP): The photoperiod was kept constant at 12 h/d at 8 weeks of age until 16 wk of age and increased gradually by an hour each wk to reach 16 h/d at 20 wk of age (Lr2). The chicks within each lighting regimen were divided equally into four dietary supplementations groups (5 replicates of 10 birds each) as follows: basal diet supplemented with 0 .5 mg Potassium iodide (control, T1), 2 mg Potassium iodide (T2), 0 .5 mg Iodide-enriched yeast (T3) and 2 mg Iodide-enriched yeast (T4) / Kg diet. The results during the laying period up to 36 wk have shown that exposing Mandarah chickens to Lr1 regimen significantly improved egg weight, egg production (%) , egg mass , feed conversion ratio, fertility (%), hatchability (%),body weight at hatch, yolk sac and fabricious gland (%) compared to Lr2 regimen. Moreover, plasma IgM, IgG, TAC, HDL, HDL/LDL ratio and T4 significantly increased for Lr1 compared with Lr2. Feeding Mandarah chickens on 2mg organic iodine/kg diet significantly improved the laying performance , feed conversion ratio, plasma IgM, HDL, HDL/LDL, T3/T4, L%, H%, H/L ratio compared with inorganic iodine either o.5 or 2 mg /kg diet. Also, the interaction of Lr1˟ organic iodine ˟ 2 represented highest (p<0.05) values of egg production%,egg mass,plasma IgM, HDL,HDL/LDL,T3/T4 ratio and L (%), Besides improvement of feed conversion compared with other interactions. In conclusion, it is possible to use the SUP regimen combined with feeding on 2 mg organic iodine /kg diet in laying management from 8-36 weeks of age to improve productive and reproductive performance, hatching traits, hatched chicks body weight and immunity system of Mandarah chickens.

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Section: Hatching Traitssupporting

confidence: 92%

Effect of Lighting Regimens and Dietary Iodine Sources on Productive and Reproductive Performance for Mandarah Chicken Strain

Iraqi

2020

EPSJ

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“…AppliquŽs ˆ des troupeaux reproducteurs, les nycthŽm•res longs tendent ˆ accro"tre la fertilitŽ comme nous avons pu le montrer d•s 1973 (Lacassagne et al). Le dŽveloppement embryonnaire prŽcoce semble Žgalement •tre lŽg•rement accŽlŽrŽ (Shanawany 1993) mais des inconvŽnients tels que lÕaugmentation de la ponte des Ïufs hors-nids et la difficultŽ de ramasser les Ïufs ont jusquÕˆ ce jour emp•-chŽ de dŽvelopper cette pratique.…”

Section: / Utilisation Des Cycles Ahžmžraux (Diffžrents De 24 Heures)unclassified

Photopériodisme et reproduction des oiseaux domestiques femelles

Sauveur

1996

INRA Prod. Anim.

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Les recherches consacrées à la sensibilité photopériodique des oiseaux domestiques ont été largement développées pendant un demi-siècle (années 30 à 80) et ont conduit à de nombreuses applications en aviculture. La première partie de l’article rappelle les données de base sur la perception et les rôles de la photopériode chez les oiseaux, en particulier : la perception transcrânienne de la lumière et ses conséquences sur l’effet stimulant des différentes longueurs d’onde ; le double rôle de la photopériode, stimulant à long terme de la reproduction et synchronisateur quotidien des événements endocriniens qui aboutissent à l’ovulation et à la formation des séries de ponte ; l’implication apparemment faible de la mélatonine dans ces mécanismes ; la notion de jour subjectif, sous-jacente aux programmes d’éclairement fractionnés. La deuxième partie est consacrée à une présentation résumée des applications de ces connaissances à la poule pondeuse. La modulation de la précocité sexuelle par des variations de photopériode reste une composante classique de l’élevage (au moins en zone tempérée) tandis que la sensibilité de la poule en ponte à la durée de photopériode semble avoir décru au cours des trois dernières décennies, en liaison probable avec la forte sélection pratiquée sur l’intensité de ponte de cette espèce. Les valeurs de certaines caractéristiques de l’oeuf (poids, épaisseur de coquille) peuvent être augmentées par l’usage de nycthémères plus longs que 24 heures ou de nycthémères de 24 heures fractionnés en blocs réguliers (sans nuit principale) ces derniers ont été largement préférés dans le contexte français. Le fractionnement de la durée du jour avec maintien d’une nuit principale permet surtout quant à lui des gains de productivité sans modification des caractéristiques de l’oeuf. La répercussion de ces traitements sur le bien-être des poules est également évoquée.

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“…Also, Wanga et al, (2002) reported that the fertility was enhanced for those reared under 14L and 18L regimes. However, Shanawany (1993) observed that fertility and hatchability improved by long photoperiods. Also, Hawes et al, (1991) and Ciacciariello and Gous (2005) stated that intermittent light programs had no affect fertility and hatchability.…”

Section: -Reproductive Performancementioning

confidence: 99%

Application of Flashed Lighting Program in Naked Neck Chickens (Sharkasi) Management

Farghly

El-Garhy

Ali

2017

EPSJ

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The present study was undertaken to investigate the effect of application flash lighting program on performance and physiological status of naked neck chickens. Three hundred and sixty, four weeks old birds were randomly distributed into 6 experimental groups (3 replicates of 20 birds each) and housed in floor pens. The first group (control group, C), birds were maintained under 12 hrs and 16 hrs common light (CL) per day during the growing and laying periods, respectively. While, in the other groups, birds were exposed to light flashes for 10 minute/hour (T1), 20 minute/hour (T2), 30 minute/hour (T3), 40 minute/hour (T4) and 50 minute/hour (T5) for 12 and 16 hrs light/day during the growing and laying periods, respectively. Main results indicated that light flashes program significantly (P≤0.05) improved growth efficiency, carcass dressing percentage, breast percentage, abdominal fat percentage, egg laying rate, egg shell thickness, sexual parameters and healthy status. Also, estradiol hormone significantly (P≤0.05) increased by application of flash lighting program. However, long period of light flashes program recorded the worst values as in general performance and welfare (H / L ratio and tonic immobility values). Insignificant (P>0.05) effect were observed in drumstick, femur, liver, heart, gizzard, most blood components, egg shape or yolk, Haugh units, leg problems, plumage conditions, bone lengths, age at sexual maturity, genital organs and hatchability percentages. From an economical point of view, it is observed that the birds exposed to light flashes periods for 10 to 30 minutes/hour were superior to that of birds in other groups. Using short periods of light flashes might be suitable as alternative light to continuous or common light for managing Sharkasi chicken in sight and stimulation of internal organs or hormones release without oppositely affecting the physiological response, healthy traits and welfare.

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Ahemeral lighting and reproductive efficiency in breeding flocks

Cited by 10 publications

References 26 publications

Effect of Lighting Regimens and Dietary Iodine Sources on Productive and Reproductive Performance for Mandarah Chicken Strain

Effect of Lighting Regimens and Dietary Iodine Sources on Productive and Reproductive Performance for Mandarah Chicken Strain

Photopériodisme et reproduction des oiseaux domestiques femelles

Application of Flashed Lighting Program in Naked Neck Chickens (Sharkasi) Management

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