Plasma Inorganic Phosphate, Calcium, and Magnesium Levels of Hens Which Laid Soft-Shelled or Shell-Less Eggs

Hester, Patricia Y.; Wilson, Ellen; Pierson, F. W.; Fabijanska, Irena

doi:10.3382/ps.0592336

Cited by 17 publications

(7 citation statements)

References 13 publications

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“…1) was fundamentally similar to the observations by several workers2, 16) On the other hand, the hens with one exception laid their retained Ct eggs in association with C1 ovulation the next day after ovulation (Fig. 1), assuming that OIF was released prior to C1 ovulation.…”

Section: Discussionsupporting

confidence: 89%

Possible Secretion of the Oviposition-Inducing Factor after Oviposition of the Terminal Egg of a Clutch Sequence

正¹,

Nakada

耕作

et al. 1990

Nihon Chikusan Gakkaiho

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To estimate whether the oviposition-inducing factor (OIF) is released other than at the time of oviposition, spontaneous oviposition of the terminal (Ct) egg of a clutch sequence was prevented by ligation of the vagina for a short period.Of 51 hens, 17 laid their retained Ct eggs on the day of operation, 25 laid about 1hr before Cl ovulation the next day after the operation, and 9 laid on the third day in association with ovulation.

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Section: Discussionsupporting

confidence: 89%

Possible Secretion of the Oviposition-Inducing Factor after Oviposition of the Terminal Egg of a Clutch Sequence

正¹,

Nakada

耕作

et al. 1990

Nihon Chikusan Gakkaiho

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“…This finding to a certain extent corresponds with the results of Rezac et al (2000), who determined the highest plasma Ca levels in laying hens producing eggs with damaged shells. On the other hand, Hester et al (1980) reported that a decrease in blood plasma Ca levels had no significant effect on eggshell quality. Other authors also reported that plasma calcium content does not correlate with eggshell quality (Buss and Stout 1981;Jerabek et al 1993).…”

Section: Discussionmentioning

confidence: 99%

Blood Plasma Mineral Profile and Qualitative Indicators of the Eggshell in Laying Hens in Different Housing Systems

2009

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The aim of this study was to compare the blood plasma mineral profile (Ca, P, K, Mg, Zn, Cu and Se) and egg-shell quality (eggshell weight, eggshell breaking strength and thickness) of laying hens housed in three different housing systems (traditional cage system, enriched cage system and deep litter system). In each housing system, 12 ISA Brown laying hens were observed during the laying period from week 22 to 75 of age. The effect (p < 0.05 and p < 0.01) of age and/or phase of the laying cycle on all mineral concentrations was determined. Eggshell breaking strength decreased (p < 0.001) with the age of birds. The results of this study indicate that the housing systems compared had no significant effect on the blood plasma mineral profile of laying hens under study and the values were within the physiological range. However, a significant effect of housing system on eggshell breaking strength and eggshell weight was found. Improved eggshell quality was obtained in most periods of the laying cycle in the enriched cage systems. Blood minerals, egg-shell quality, standard cage, enriched cage, deep litter floorPassage of the Council Directive 1999/74/EC has resulted in the replacement of traditional cages with enriched cages, litter technologies or aviaries to improve the welfare of laying hens. The shell quality remains one of the most important issues for the technology of further egg handling (Ledvinka et al. 2000). However, some authors pointed out that there are differences in eggshell quality and proportion of cracked eggs between different housing systems (Abrahamsson et al. 1995;Abrahamsson and Tauson 1997;Wall and Tauson 2002). Shell quality can be influenced by many factors including mineral nutrition. Calcium, magnesium and phosphorus are major inorganic constituents of avian eggshells (Cusack et al. 2003). Simons (1976) found small amounts of potassium, copper and zinc in the palisade layer of the eggshell. The presence of sodium, potassium, magnesium, zinc, and copper was confirmed also in the shell membranes (Wedral et al. 1974). The importance of minerals is reflected in changes of arrangement pattern of shell membrane fibres in relation to the structural composition of the eggshell, for example when using copper-and magnesium-deficient diets (Leach and Gross 1983). Traces of magnesium, potassium, copper and zinc were also found in the egg cuticle. Plasma mineral concentrations during the laying period can be influenced by many factors; such as laying rate and energy requirements (Suchý et al. 2001), partial quantitative feed restriction (Sahin and Kucuk 2001), mineral supplements (Eren et al. 2004), ambient temperature (Siegel 1995;Donoghue et al. 1990;Ching 1992;Belay and Teeter 1993; Večerek et al. 2002), production type (Suchý et al. 2004), age of hens (Cerolini et al. 1990;Gyenis et al. 2006), stress (Beisel 1982Combs and Combs 1984; Tufft and Nockles 1991;Klasing 1998), exposure to heavy metals (Zralý et al. 2008), etc.With regard to differences in eggshell quality between different ho...

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“…Eggs were collected daily and classified as either HS, soft-shelled (SS), or SL as described by Hester et al (1980). To ensure accurate recording of all SS and SL eggs, the cages were equipped with sheet metal dropping boards, which were scraped clean following the collection (Roland, 1977;Wilson et al, 1981).…”

Section: Methodsmentioning

confidence: 99%

Response of Layer Breeders to Dietary Acetylsalicylic Acid. 2. Effects on Circulating Concentrations of Prostaglandin F2α

et al. 1993

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White Leghorn breeder hens were fed 0, .05, or .40% acetylsalicylic acid (ASA) for either 1 wk or 1 mo. Blood samples were collected 4 h postentrance of an egg into the uterus (baseline) and at oviposition of a hardshelled (HS) egg. Plasma samples were analyzed for prostaglandin (PG) F2 alpha by radioimmunoassay. Peripheral PGF2 alpha concentrations peaked upon oviposition of a HS egg in both ASA-fed hens as well as the controls (0% ASA). The levels of dietary ASA and the duration of time the ASA was administered did not affect baseline or peak PGF2 alpha concentrations. It was concluded that either the timing or route of administration of ASA resulted in the failure of ASA to effectively reduce peak peripheral PGF2 alpha concentrations.

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Plasma Inorganic Phosphate, Calcium, and Magnesium Levels of Hens Which Laid Soft-Shelled or Shell-Less Eggs

Cited by 17 publications

References 13 publications

Possible Secretion of the Oviposition-Inducing Factor after Oviposition of the Terminal Egg of a Clutch Sequence

Possible Secretion of the Oviposition-Inducing Factor after Oviposition of the Terminal Egg of a Clutch Sequence

Blood Plasma Mineral Profile and Qualitative Indicators of the Eggshell in Laying Hens in Different Housing Systems

Response of Layer Breeders to Dietary Acetylsalicylic Acid. 2. Effects on Circulating Concentrations of Prostaglandin F2α

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