Iodine nutrition in ewes : effects of low to high iodine intake on iodine content of biological fluids in pregnant and lactating ewes

Aumont, Gilles; Lamand, M.; Tressol, J.C.

doi:10.1051/rnd:19890110

Cited by 10 publications

(10 citation statements)

References 32 publications

(23 reference statements)

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“…On farm A this difference was found in both experimental and control animals (Figure 1), whereas on farm B a significant colostrum/milk difference was determined only in the experimental sows (Figure 2). This result corresponds with the measurements by Aumont et al (1989), who found 1.5 to 6.7-fold higher amounts of iodine in colostrum compared to its amount in milk depending on the level of iodine supplementation to pregnant ewes.…”

Section: Resultssupporting

confidence: 91%

Use of Chlorella as a carrier of organic-bound iodine in the nutrition of sows

Kotrbáček¹,

Doucha²,

Offenbartl³

2004

CZECH J ANIM SCI

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The effect of supplementation with iodine incorporated into biomass of the unicellular alga Chlorella on the content of this element in colostrum and milk was investigated in sows of the Large White breed. Experiments were conducted in two elite herds with different levels of iodine supply in basal feed mixtures. On farm A the feed mixture contained 1 549 µg I/kg, on farm B it was 228 µg I/kg. Pregnant sows on both farms were divided into control and experimental group a fortnight before parturition. Control group comprised 8 sows on farm A and 6 sows on farm B. As the sows on both farms received feed rations of 3 kg feed per head/day, iodine uptake of control animals was 4 647 µg I per head/day on farm A and 684 µg I per head/day on farm B. In addition to this supply experimental sows, 9 animals on farm A and 6 animals on farm B, received 450 µg per head/day of iodine bound in Chlorella biomass. Total iodine uptake was 5 097 µg per head/day on farm A and 1 134 µg per head/day on farm B. Supplementation also continued in the lactation period when total iodine uptake increased with increasing feed consumption. The supplement of organically bound iodine for experimental sows continued to be 450 µg per head/day. Colostrum samples were taken in both groups on the first two days after parturition while milk samples were taken at the end of the third week of lactation. Iodine concentration in these samples and in feed mixtures was determined spectrophotometrically according to Sandell-Kolthoff’s method. Numbers of born and reared piglets, and lactation performance of sows determined by weighing litters on day 21 of piglet life were investigated in individual sows. This litter weight was used to calculate average weight gains of piglets for the period of investigations. The supplementation of Chlorella -bound iodine increased the content of this element in colostrum of experimental sows from 365 ± 81 µg/l to 492 ± 122 µg/l on farm A (p < 0.05) and from 241 ± 70 µg/l to 391 ± 75 µg/l on farm B (p < 0.01). Iodine concentration in milk decreased in all sows, particularly in the animals included in both experimental groups, where it decreased to about half the values detected in colostrum (p < 0.01). Lower iodine content in milk of supplemented sows corresponded with their higher lactation performance. Differences in milk production were obvious mainly on farm B, i.e. in sows with low uptake of dietary iodine. The average lactation performance of supplemented sows on this farm was 61.2 ± 7.95 kg/head while in controls it was 54.9 ± 4.22 kg/head. As the number of experimental animals was low, this difference was below the level of statistical significance. Neither was it possible to prove the higher weight gains of piglets found out in both experimental groups on a significance level. No relationship was established between the number of reared piglets and supplementation of organically bound iodine. It can be concluded from the results that the supplementation of iodine bound in Chlorella biomass increased its concentration in colostrum of sows with both the low and the high dietary uptake of this element, which proved its good utilisation. A possible positive effect of this supplementation on lactation performance of sows and weight gains of piglets should be verified in further experiments.  

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Section: Resultssupporting

confidence: 91%

Use of Chlorella as a carrier of organic-bound iodine in the nutrition of sows

Kotrbáček¹,

Doucha²,

Offenbartl³

2004

CZECH J ANIM SCI

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“…This could explain why, despite a lower I content in the thyroid gland, the thyroxine secretion rate of the lambs was not impaired, whereas it was impaired in the dams during lactation (Aumont et al, 1989). In any case, 0.12 mg of I/kg DM can be assumed to be the lowest limit for I intake before a deficiency occurs in lactating ewes and in their fetuses and lambs at birth.…”

Section: Analysesmentioning

confidence: 97%

“…The right thyroid lobes were homogenized in 5 ml of sodium chloride solution (0.154 mol/I) with a Potter Elvehjem homogenizer. The total I content of the thyroid lobes was determined in 0.5 ml of homogenized tissue (Aumont and Tressol, 1986 (Aumont et al, 1989). Analysis of variance-covariance (Seebeck, 1973) (Siegel, 1956) (Table IV).…”

Section: Analysesmentioning

confidence: 99%

“…In a previous paper (Aumont et al, 1989), experimental designs that allowed the I intake from a subdeficient to a subtoxic level to be strictly monitored were described with particular attention to the change of the Pll of ewes and the I in milk. These I spaces are the single I sources for the fetus and the newborns, respectively.…”

mentioning

confidence: 99%

“…The absorption of immunoglobulins G (IgG) from colostrum by the lamb is strongly affected by the thyroid status (Cabello et al, 1980;Cabello and Levieux, 1981 (Aumont et al, 1989 …”

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Iodine nutrition in ewes. 2. Effects of low to high iodine intake by ewes on the I content of biological fluids and plasma immunoglobulins G in newborn lambs

Aumont¹,

Levieux²,

Lamand³

et al. 1989

Reprod. Nutr. Dévelop.

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2. I intake of ewes had no effect on birthweight, body weight gain, or mortality between birth and wk 2 of life. No difference between the groups was recorded in the weights of brain, heart, lungs, and liver of lambs killed at birth. However, the weight of both the thyroid lobes in lambs from group E was lower than that of the other groups. The I content of the thyroid lobes of lambs from group A was 30-40% lower than that of the other groups.3. The plasma inorganic iodine (PII) of lambs from birth to d42 of life was affected by ewe I intake, except for groups A and B, during the first 16 h of life. The Pll of lambs increased with the I intake via milk in each group. The ratio of Pil of lambs at birth/Pll of ewes at d7 prepartum was 3.77, 2.96,

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Faye¹,

Bengoumi²

2018

Camel Clinical Biochemistry and Hematology

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Iodine nutrition in ewes : effects of low to high iodine intake on iodine content of biological fluids in pregnant and lactating ewes

Cited by 10 publications

References 32 publications

Use of Chlorella as a carrier of organic-bound iodine in the nutrition of sows

Use of Chlorella as a carrier of organic-bound iodine in the nutrition of sows

Iodine nutrition in ewes. 2. Effects of low to high iodine intake by ewes on the I content of biological fluids and plasma immunoglobulins G in newborn lambs

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