Acta Univ. Agric. Silvic. Mendelianae Brun. 2004, 52(2), 27-32 | DOI: 10.11118/actaun200452020027

Koncentrace kortikosteronu v krevní plazmě nosnic (Gallus domesticus) v průběhu snáškového cyklu

Aleš Pavlík, Zdeněk Havlíček
Ústav morfologie, fyziologie a veterinářství, Mendelova zemědělská a lesnická univerzita v Brně, Zemědělská 1, 613 00 Brno, Česká republika

Cílem práce bylo sledování koncentrace kortikosteronu v krevní plazmě nosnic v průběhu snáškového cyklu. Do experimentu bylo zařazeno 12 nosnic hybridní kombinace ISA Brown. Nosnice byly ustájeny v komfortní klecové technologii odpovídající požadavkům Směrnice Rady 1999/74/EC a krmeny kompletní krmnou směsí. Krev byla odebírána v deseti termínech v období od 15. do 75. týdnu věku. Průměrná koncentrace kortikosteronu byla za celé období snášky 2,86 ± 0,086 nmol.l-1, přičemž průměrné koncentrace se v jednotlivých termínech sledování pohybovaly v rozmezí od 1,76 ± 0,135 do 3,98 ± 0,357 nmol.l-1. Koncentrace kortikosteronu se vysoce průkazně (P≤0,01) zvyšovala na začátku snáškového cyklu a do 47. týdne věku mírně kolísala. V 52. se vysoce průkazně (P≤0,01) zvýšila až na průměrné hodnoty 3,98 ± 0,236 nmo.l-1. Od 58. týdne věku slepic se hladina kortikosteronu v krevní plazmě snižovala až do konce snáškového cyklu, a to na průměrnou hodnotu 2,22 ± 0,210 nmol.l-1. Ze zjištěných dat je zřejmé, že hladina kortikosteronu mírně kolísala v první polovině snáškového cyklu s navazující vzestupnou tendencí s vrcholem v 52. a 58. týdnu a následným poklesem až do konce snáškového období (75. týden věku nosnic).

nosnice, kortikosteron, komfortní klecová technologie

Plasma corticosterone concentration in laying hens (Gallus Domesticus) during the laying period

The aim of this work was to study corticosterone concentration in the plasma of laying hens (gallus domesticus) during the laying period. The experiment included 12 ISA Brown laying hens, which were caged in enriched cage system according to EU directive 1999/74. They were fed by complete diet for laying hens. Blood samples were taken between 15th and 75th week of age. Mean corticosterone concentration during the whole period was 2.86 ± 0.086 nmol.l-1 and ranged from 1.76 ± 0.135 to 3.98 ± 0.0357 nmol.l-1. Plasma corticosterone concentration increased significantly (P≤0.01) at the beginning of the laying period. Then followed slight variation until 47th week of age. Corticosterone concentration increased significantly (P≤0.01) again at 52nd week of age to 3.98 ± 0.236 nmol.l-1. From 58th week of age to end of laying period plasma corticosterone concentration decreased and reached the value of 2.22 ± 0.210 nmol.l-1.

Keywords: laying hens, corticosterone, enriched cage technology

Received: February 6, 2004; Published: July 3, 2015  Show citation

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Pavlík, A., & Havlíček, Z. (2004). Plasma corticosterone concentration in laying hens (Gallus Domesticus) during the laying period. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 52(2), 27-32. doi: 10.11118/actaun200452020027
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