A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Is maternal thyroid hormone deposition subject to a trade-off between self and egg because of iodine? : An experimental study in rock pigeon (2021)
Sarraude, T., Hsu, B.-Y., Ruuskanen, S., & Groothuis, T. (2021). Is maternal thyroid hormone deposition subject to a trade-off between self and egg because of iodine? : An experimental study in rock pigeon. Journal of Experimental Biology, 224(20), Article jeb242203. https://doi.org/10.1242/jeb.242203
JYU-tekijät tai -toimittajat
Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: Sarraude, Tom; Hsu, Bin-Yan; Ruuskanen, Suvi; Groothuis, Ton
Lehti tai sarja: Journal of Experimental Biology
ISSN: 0022-0949
eISSN: 1477-9145
Julkaisuvuosi: 2021
Ilmestymispäivä: 15.10.2021
Volyymi: 224
Lehden numero: 20
Artikkelinumero: jeb242203
Kustantaja: The Company of Biologists
Julkaisumaa: Britannia
Julkaisun kieli: englanti
DOI: https://doi.org/10.1242/jeb.242203
Linkki tutkimusaineistoon: https://doi.org/10.5281/zenodo.5024376
Julkaisun avoin saatavuus: Avoimesti saatavilla
Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava
Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/78766
Julkaisu on rinnakkaistallennettu: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8545739/
Tiivistelmä
Maternal hormones constitute a key signalling pathway for mothers to shape offspring phenotype and fitness. Thyroid hormones (THs; triiodothyronine, T3; and thyroxine, T4) are metabolic hormones known to play crucial roles in embryonic development and survival in all vertebrates. During early developmental stages, embryos exclusively rely on exposure to maternal THs, and maternal hypothyroidism can cause severe embryonic maldevelopment. The TH molecule includes iodine, an element that cannot be synthesised by the organism. Therefore, TH production may become costly when environmental iodine availability is low. This may yield a trade-off for breeding females between allocating the hormones to self or to their eggs, potentially to the extent that it even influences the number of laid eggs. In this study, we investigated whether low dietary iodine may limit TH production and transfer to the eggs in a captive population of rock pigeons (Columba livia). We provided breeding females with an iodine-restricted (I−) diet or iodine-supplemented (I+) diet and measured the resulting circulating and yolk iodine and TH concentrations and the number of eggs laid. Our iodine-restricted diet successfully decreased both circulating and yolk iodine concentrations compared with the supplemented diet, but not circulating or yolk THs. This indicates that mothers may not be able to independently regulate hormone exposure for self and their embryos. However, egg production was clearly reduced in the I− group, with fewer females laying eggs. This result shows that restricted availability of iodine does induce a cost in terms of egg production. Whether females reduced egg production to preserve THs for themselves or to prevent embryos from exposure to low iodine and/or THs is as yet unclear.
YSO-asiasanat: lisääntyminen; lisääntymiskäyttäytyminen; ravinto; ravintoaineet; jodi; hormonaaliset vaikutukset; hormonit; emot; muninta; linnut; kyyhkyt
Vapaat asiasanat: maternal effects; maternal hormones; maternal investment; trade-offs; birds
Liittyvät organisaatiot
OKM-raportointi: Kyllä
Raportointivuosi: 2021
JUFO-taso: 2
