Evolution of placentotrophy: using viviparous sharks as a model to understand vertebrate placental evolution
@article{Buddle2019EvolutionOP, title={Evolution of placentotrophy: using viviparous sharks as a model to understand vertebrate placental evolution}, author={Alice L Buddle and James U. Van Dyke and Michael B. Thompson and Colin A. Simpfendorfer and Camilla M. Whittington}, journal={Marine and Freshwater Research}, year={2019} }
Reproducing sharks must provide their offspring with an adequate supply of nutrients to complete embryonic development. In oviparous (egg-laying) sharks, offspring develop outside the mother, and all the nutrients required for embryonic growth are contained in the egg yolk. Conversely, in viviparous (live-bearing) sharks, embryonic development is completed inside the mother, providing offspring with the opportunity to receive supplementary embryonic nourishment, known as matrotrophy. Viviparous…
14 Citations
The evolution and physiology of male pregnancy in syngnathid fishes
- BiologyBiological reviews of the Cambridge Philosophical Society
- 2020
The taxonomic distribution of syngnathid parity mode is assayed, the selective pressures that may have led to the emergence of male pregnancy are examined, the biology of synathids reproduction is described, and pressing areas for future research are highlighted.
Morphological basis for maternal nutrient provision to embryos in the viviparous fish Ataeniobius toweri (Teleostei: Goodeidae)
- BiologyJournal of morphology
- 2021
In viviparous Mexican fishes of the family Goodeidae, embryos develop in the maternal ovarian lumen. They typically absorb maternal nutrients during gestation by means of “trophotaeniae,” that is,…
Paternal nutrient provisioning during male pregnancy in the seahorse Hippocampus abdominalis
- BiologyJournal of Comparative Physiology B
- 2020
The results of this study support the hypothesis that nutrient transport occurs in the most advanced form of male pregnancy in vertebrates and suggest that lipid yolk reserves being depleted by embryonic metabolism are replaced by the brooding father.
Structure of the paraplacenta and the yolk sac placenta of the viviparous Australian sharpnose shark, Rhizoprionodon taylori.
- Medicine, BiologyPlacenta
- 2021
Structural changes to the brood pouch of male pregnant seahorses (Hippocampus abdominalis) facilitate exchange between father and embryos.
- BiologyPlacenta
- 2021
Structure and permeability of the egg capsule of the placental Australian sharpnose shark, Rhizoprionodon taylori
- BiologyJournal of comparative physiology. B, Biochemical, systemic, and environmental physiology
- 2022
This work investigates the structure and permeability of the egg capsules that surround developing embryos of the placental Australian sharpnose shark (Rhizoprionodon taylori) during late pregnancy and finds the thinnest egg capsule of any placental shark measured so far, which may increase the diffusion rate of respiratory gases, fetal wastes, water and nutrients between maternal and fetal tissues.
Reproductive Science in Sharks and Rays.
- Environmental ScienceAdvances in experimental medicine and biology
- 2019
Current reproductive technologies including computer assisted sperm assessments to study warming effects on sperm motility and intra-uterine satellite tags to determine birthing grounds will serve to generate data to mitigate anthropogenic changes that threaten the future of this vulnerable groups of fish.
Different Genes are Recruited During Convergent Evolution of Pregnancy and the Placenta
- BiologyMolecular biology and evolution
- 2022
It is concluded that redundancies in gene function have enabled the repeated evolution of viviparity through recruitment of different genes from genomic “toolboxes”, which are uniquely constrained by the ancestries of each lineage.
New insights on folliculogenesis and follicular placentation in marine viviparous fish black rockfish (Sebastes schlegelii).
- BiologyGene
- 2022
New Insights on Folliculogenesis and Follicular Placentation in Marine Viviparous Fish Black Rockfish (Sebastes Schlegelii)
- Biology
- 2021
A new type of placentation pattern for viviparous teleost between the intrafollicular gestation and intraluminal gestation is provided for Sebastes schlegelii suggesting the high convergence in vertebrate placenta evolution.
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