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Maternal regulation of embryonic and larval competence; evolutionary considerations
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Maternal regulation of embryonic and larval competence; evolutionary considerations
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Thyroid hormones (THs; T<SUB>3</SUB> and T<SUB>4</SUB>) deposited in yolk from the maternal circulation during oogenesis promote fish embryo differentiation and survival - a transgenerational relationship that has persisted throughout the vertebrates. Large-scale mortality of larval fishes commonly occurs at the time of first feeding, and survival of this transition is improved by exposure to maternal or exogenous hormones. Thyroid hormones stimulate initial digestive function, swim bladder and eye maturation, contributing to independent feeding and survival. Some of these actions are transduced by insulin-like growth factor I (IGF-1), others are modified by glucocorticoids. Hormone replacement therapies have some practical hatchery applications.
Recent evidence suggests that echinoderms initially used iodinated peptides for antioxidant purposes and later for maternal to larval endocrine signaling. Iodinated tyrosine regulates larval metamorphosis and promote ... View All

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UCI(KEPA) : I410-ECN-0101-2021-529-001943820