The Effects of an Iodine Deficiency on Embryo Development and Hatchability ,

Rogler, J. C.; Parker, H. E.; Andrews, F. N.; Carrick, C. W.

doi:10.3382/ps.0380398

Cited by 27 publications

(12 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The gross morphological symptoms observed at hatching were consistent with those described for iodine deficiency in poultry (i.e., frequent deaths at hatching; extended pipping period resulting in tough, dried out membranes; and failure to resorb the yolk sac [Rogler et al, 1959]). This observation led management to supplement the entire captive population with iodine, and the thyroid gland structures were specifically examined during all necropsies.…”

Section: Discussionsupporting

confidence: 61%

“…Moderate to severe iodine deficiency results in an enlarged thyroid gland containing a large proportion of follicles with little or no colloidal material, due to compensatory hypertrophy of follicular cells, a reduction in the concentration of iodine in the thyroid, an increase in the ratio of T3/T4, and a decrease in serum T4 [Kaneko, 1989;Taurog, 1996]. Iodine deficiency has been linked to smaller embryos, incompletely absorbed yolk sacs, reduced hatchability, and delayed hatching [Rogler et al, 1959].…”

Section: Discussionmentioning

confidence: 99%

“…Hatchability of eggs depends on many factors [Hamilton et al, 1999], including parental genetics, maternal age, and environmental conditions, as well as methods of egg collection and storage, and the incubation or hatching environment. Low hatchability may also be attributed to parental nutrition and trace mineral deficiencies [Rogler et al, 1959;Naber, 1979;Whitehead, 1991;Wilson, 1997].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Iodine deficiency affects hatchability of endangered captive kaki (Black Stilt, Himantopus novaezelandiae)

Sancha¹,

Heezik

Maloney³

et al. 2004

Zoo Biology

View full text Add to dashboard Cite

A significant increase in hatching and late-incubation deaths during two breeding seasons in a captive population of endangered black stilts (kaki, Himantopus novaezelandiae) prompted an investigation into the potential role of iodine deficiency. During the 1997 and 1998 breeding seasons, the survival rate of captive-laid eggs during artificial incubation and hatching was lower than that of eggs laid by wild kaki, which were collected and incubated artificially in the same environment. Necropsy results revealed abnormalities in thyroid structure. These abnormalities had been occurring in captive birds since 1994, but they peaked in 1997 and 1998 at 30% and 81%, respectively, of all diagnosed necropsies. Necropsies of pied stilts, hybrids, and one kaki from the wild revealed no thyroid abnormalities. Gross morphological symptoms observed at hatching in chicks that died were consistent with those described for iodine deficiency in poultry. Serum levels of thyroxine (T4) were considerably higher in wild pied stilts and hybrid chicks than in captive adult, subadult, and kaki chicks. In five individuals from the captive population, serum levels increased after about 160 days of iodine supplementation and approached values in the wild. The constraints associated with working with such a critically endangered species (e.g., small sample size and an urgent need to effect changes) precluded the use of an experimental approach to determine the role iodine deficiency played in peri-hatching deaths. However, we believe the evidence presented here strongly supports a case for the impact of iodine on survival within the captive population. Our experience also highlights the need for vigilance in captive programs with respect to potential dietary deficiencies when endangered species Grant sponsor: University of Otago.

show abstract

Section: Discussionsupporting

confidence: 61%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Iodine deficiency affects hatchability of endangered captive kaki (Black Stilt, Himantopus novaezelandiae)

Sancha¹,

Heezik

Maloney³

et al. 2004

Zoo Biology

View full text Add to dashboard Cite

show abstract

“…No data on the hatchabilities of the three lots were presented. In the case of eggs from hens on iodine deficient rations, Rogler, Parker, Andrews and Carrick (1959) obtained results showing a greatly increased hatching time for the iodine deficient eggs.…”

Section: Review Of Literaturementioning

confidence: 72%

Hatching Time and Hatchability in the Fowl

1961

View full text Add to dashboard Cite

“…lodine deficiency and goitrogenic substances in the diet have been reported to decrease the reproductivity ofsheep (Flux et al 1960) and hen (Rogler 1958, Rogler et al 1959. Thyroidectomy of pregnant sheep (Falconer 1965) and goats (Ekman 1965) reduced severely the viability of the new-born.…”

mentioning

confidence: 99%

Effect of iodine deficiency on the reproductive performance of female rats and the viability and growth rate of their progeny

Kossila

Myllymaa

1970

AFSci

View full text Add to dashboard Cite

The experimental period was apparently too short and the number of rats too small to demonstrate a significant effect of iodine deficiency on some indices of reproduction of the females and the growth rate of their progeny. It was found, however, that iodine deficiency: a) delayed significantly the conception of the second generation females (C2) (Table 3) but was quite ineffective in the first generation females (B1, C1) (Tables 2 & 4), b) did not significantly affect the number of pups dropped or their birth weight, c) increased pup mortality during suckling period, d) tended to decrease the weight of the female sex organs of adult rats (Table 5), e) increased the absolute thyroid weight more rapidly in young growing rats than in old fullgrown rats (Tables 3, 4 & 5), and more rapidly in growing males than females, f) decreased significantly and progressively the PBI level in the serum of adult females which had pregnancies and lactations, g) obviously adversely affected the milk secretion of C1 rats during their second lactation on iodine deficient diet (Experiment II) as judged from the growth rate of their pups during 0—15 days after birth, h) did not adversely affect the growth rate of the suckling offspring of the dams during their first lactation on iodine deficient diet (Tables 3 & 4), i) did not significantly affect the rate of gain of the young rats from weaning up to 60-days of age. The rats transferred from iodine deficient to commercial diet at weaning had larger body weights and smaller thyroids at the age of 60 days than their litter mates remaining on an iodine deficient diet (Table 4). There is of course a possibility that the commercial diet was more palatable than the semisynthetic diet. It is also possible that the iodine deficiency activated the thyroid during the preweaning period and that after the transfer to iodine containing commercial diet at weaning, more thyroxine was secreted from preactivated glands compared to thyroids of the controls or thyroids of the rats kept on an iodine deficident diet throughout the growth period. Thyroid hormones are required for normal growth. A hypothyroid condition favours the accumulation of water and fat into the body tissues and may by this way result in an increase of the body weight. ln this study, however, no attempt was made to estimate the fat content of the body of the experimental rats.

show abstract

The Effects of an Iodine Deficiency on Embryo Development and Hatchability ,

Cited by 27 publications

References 16 publications

Iodine deficiency affects hatchability of endangered captive kaki (Black Stilt, Himantopus novaezelandiae)

Iodine deficiency affects hatchability of endangered captive kaki (Black Stilt, Himantopus novaezelandiae)

Hatching Time and Hatchability in the Fowl

Effect of iodine deficiency on the reproductive performance of female rats and the viability and growth rate of their progeny

Contact Info

Product

Resources

About