Search Results - "Gvaryahu, G"

New monochromatic light source for laying hens by Rozenboim, I. (Hebrew University of Jerusalem, Israel.), Zilberman, E, Gvaryahu, G

“…Artificial illumination is an important factor in the management of layers. In this study, a new monochromatic light system was developed for egg layers…”
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Glucocorticoid administration during incubation: embryo mortality and posthatch growth in chickens by Heiblum, R, Arnon, E, Chazan, G, Robinzon, B, Gvaryahu, G, Snapir, N

“…The effects of glucocorticoids (GC) on embryonic mortality and posthatch BW were studied. Cortisol hemisuccinate or corticosterone in 0.1-mL vehicles were…”
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Short-Term Stress Increases Testosterone Secretion from Testes in Male Domestic Fowl by Heiblum, R., Arnon, E., Gvaryahu, G., Robinzon, B., Snapir, N.

“…Prolonged stress inhibits the hypothalamus–pituitary–gonadal (HPG) axis and reduces plasma testosterone (T). However, enhanced secretion of luteinizing hormone…”
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Tonic immobility and open field responses in domestic fowl chicks during the first week of life by Heiblum, R, Aizenstein, O, Gvaryahu, G, Voet, H, Robinzon, B, Snapir, N

“…The ontogeny of the tonic immobility (TI) response in domestic fowl chicks was studied during the first week of life. The TI response of naive White-Leghorn…”
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Method for collecting semen from the ostrich (Struthio camelus) and some of its quantitative and qualitative characteristics by Rozenboim, I, Navot, A, Snapir, N, Rosenstrauch, A, El Halawani, M.E, Gvaryahu, G, Degen, A

“…1. Four methods of semen collecting that involved interruption of mating in two breeding ostrich pairs were tested: an artificial vagina was tested without…”
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A method for obtaining semen from the ostrich ( Struthio camelus ) and some of its quantitative and qualitative characteristics by Rozenboim, I., Navot, A., Snapir, N., Gvaryahu, G., Rosenshtrauch, A., Degen, A.

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Intermingling heavy and light strain chickens may cause social stress by Gvaryahu, G. (The Hebrew University of Jerusalem, Rehovot, Israel.), Shalev, U, Robinson, B, Snapir, N

“…The present study examines the effects of intermingling day-old broiler chicks with 2-wk-old light strain chicks, on body weight, general activity, feeding…”
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Testosterone concentrations, testes weight and morphology of mule drakes (Muscovy drake X Khaki Campbell) by Snapir, N., Rulf, J., Meltzer, A., Gvaryahu, G., Rozenboim, I., Robinzon, B.

“…1. Mule ducks were produced by naturally mating Muscovy drakes and Khaki Campbell ducks. 2. Semen was collected from 6-month-old mule drakes via an artificial…”
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An enrichment object that reduces aggressiveness and mortality in caged laying hens by Gvaryahu, G, Ararat, E, Asaf, E, Lev, M, Weller, J I, Robinzon, B, Snapir, N

“…The effect on aggressive pecking activity and mortality by an environmental enrichment device was examined. In this study, 2955 White Leghorn chickens from…”
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Aggressive behaviour in immature captive Nile crocodiles, Crocodylus niloticus, in relation to feeding by Morpurgo, B, Gvaryahu, G, Robinzon, B

“…This study presents five aspects of aggressive behaviour in juvenile Nile crocodiles, Crocodylus niloticus, as observed in five cohorts of 6-18 month-old…”
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Food preference, fish attractability and behavior manifested toward new feed in young Nile crocodiles, Crocodylus niloticus by Morpurgo, B, Gvaryahu, G, Robinzon, B

“…Food preference and fish-attractive parameters were studied on 1000 15- to 18-month-old Nile crocodiles, using two-choice preference tests. All three…”
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Population size, cage area, and dominance rank effects on productivity and well-being of laying hens by Cunningham, D L, van Tienhoven, A, Gvaryahu, G

“…The effect of two cage population sizes (four vs. six/cage) and two cage area treatments (316 cm2 vs. 406 cm2/bird) were compared in a nonconfounded design…”
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Application of the filial imprinting phenomenon to broiler chicks at a commercial farm by Gvaryahu, G, Snapir, N, Robinzon, B

“…Ten thousand broiler chicks on commercial farms in Israel were imprinted to blue and red plastic boxes (20 x 20 x 40 cm) containing loud speakers (8 omega, 12…”
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Effects on productivity and aggressive behavior of laying hens of solid versus wire cage partitions and bird density by Cunningham, D L, Gvaryahu, G

“…The effects of solid metal cage partitions or wire mesh cage partitions and two cage densities (5 or 7 birds/60.9 cm X 35.6-cm shallow cage) on production…”
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Induction of precocious development of reproductive function in cockerels by tamoxifen administration by Rozenboim, I, Gvaryahu, G, Robinzon, B, Sayag, N, Snapir, N

“…To examine the effects of tamoxifen, a known estrogen antagonist in the chicken, two groups of cockerels were injected every other day from hatching until 7…”
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Fertile semen from 9-week-old chicks treated with tamoxifen by Rozenboim, I, Gvaryahu, G, Robinzon, B, Sayag, N, Snapir, N

“…White Leghorn male chicks were injected with 1 mg/kg BW of tamoxifen (an anti-estrogen) on alternating days between 2 and 9 wk of age. This treatment increased…”
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Testosterone and adiposity in the chicken: the effect of breed and sex by Robinzon, B, Rozenboim, I, Sayag, N, Gvaryahu, G, Waxler, J, Snapir, N

“…The leaning role, previously suggested for testosterone in chickens, was tested in males and females of fatty and lean breeds. The breeds used were the White…”
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An improved method for obtaining semen from Muscovy drakes and some of its quantitative and qualitative characteristics by Gvaryahu, G, Robinzon, B, Meltzer, A, Perek, M, Snapir, N

“…An improved method for obtaining semen from the Muscovy drake using an "artificial vagina" was developed and employed on a commercial scale. With such a…”
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Artificial insemination and natural mating in the crossbreeding of the Muscovy drake and the Pekin duck by Gvaryahu, G, Robinzon, B, Meltzer, A, Perek, M, Snapir, N

“…Artificial insemination and natural mating were used for the crossbreeding of the Muscovy drake with the Pekin duck in order to produce the Mule duck. An…”
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The gonadotropic-axis involvement in the course of the filial following response in the domestic fowl chick by Gvaryahu, G, Snapir, N, Robinzon, B, Goodman, G, el Halawani, M E, Grimm, V E

“…The detachment process of the domestic chick from its mother, or any other imprinting object occurs between the sixth and tenth week after hatching. The…”
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