Direct evidence for embryonic uptake of paternally-derived nutrients in two pipefishes (Syngnathidae: Syngnathus spp.)

@article{Ripley2008DirectEF,
  title={Direct evidence for embryonic uptake of paternally-derived nutrients in two pipefishes (Syngnathidae: Syngnathus spp.)},
  author={Jennifer L. Ripley and Christy M. Foran},
  journal={Journal of Comparative Physiology B},
  year={2008},
  volume={179},
  pages={325-333}
}
  • J. Ripley, C. Foran
  • Published 1 April 2009
  • Biology, Environmental Science
  • Journal of Comparative Physiology B
Seahorses, sea dragons and pipefishes of the teleost family Syngnathidae are unique in that embryos develop within specialized brooding structures of the male. We enriched brooding Syngnathus fuscus and Syngnathus floridae males with injections of L-lysine-[15N2] and 16:0-palmitic acid 1-[13C] to demonstrate embryonic uptake of paternally-derived nutrients. While all embryos demonstrated amino acid enrichment, late stages showed significantly higher [15N], indicating greater utilization of… 
Osmoregulatory role of the paternal brood pouch for two Syngnathus species.
  • J. Ripley
  • Biology
    Comparative biochemistry and physiology. Part A, Molecular & integrative physiology
  • 2009
Evidence of paternal nutrient provisioning to embryos in broad-nosed pipefish Syngnathus typhle.
TLDR
It is concluded that brooding males provide amino acids, and probably also glucose, to the developing embryos in the brood pouch andRadioactively labelled nutrients were tube-fed to brooding male Syngnathus typhle.
Quantification of whole brain arginine vasotocin for two Syngnathus pipefishes: elevated concentrations correlated with paternal brooding
TLDR
Interspecific differences in the variability and mean AVT concentration for non-brooding males, the brood stage showing a return to post- Brooding concentrations, and the variability of AVT concentrations for brooding males with embryos in some development stages are documented.
Paternal care and brood reduction in a pipefish
TLDR
It is demonstrated that brooding males absorb nutrients from reduced embryos in their brood pouch, presumably benefiting their own nutrition, and that brood reduction in this species is similar to filial cannibalism (eating of own young), found in many other fish species with paternal care.
Morphological and quantitative changes in paternal brood-pouch vasculature during embryonic development in two Syngnathus pipefishes.
TLDR
This is the first study to document changes in brood-pouch vasculature during specific stages of embryonic development, to show regression of this vasculatures before fry release and to provide morphological data for two syngnathid species for which information on brood- pouch physiology is available.
Pouch brooding marsupial frogs transfer nutrients to developing embryos
TLDR
Results suggest that in addition to gas exchange, the vascularized brood pouch membrane of G. excubitor also enables maternal nutrient transfer, and suggests greater complexity in reproductive and provisioning modes than previously thought.
The Effects of Food Limitation on Life History Tradeoffs in Pregnant Male Gulf Pipefish
TLDR
Monitoring growth rate and offspring survivorship during the pregnancies of males under low- or high-food conditions suggests that undeveloped eggs reduce the pregnancy’s overall cost to the male compared to broods containing only viable offspring.
Evolutionary ecology of pipefish brooding structures: embryo survival and growth do not improve with a pouch
TLDR
Negative effects of large egg size are suggested, despite the protection of brood pouches, in pipefishes that reproduce in water under hypoxia.
Brooding fathers, not siblings, take up nutrients from embryos
TLDR
It is demonstrated here that nutrients can pass the other way, from embryos to the parent, for the first time, that males absorb nutrients derived from embryos through their paternal brood pouch.
Paternal nutrient provisioning during male pregnancy in the seahorse Hippocampus abdominalis
TLDR
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.
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TLDR
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