Morphological and quantitative changes in paternal brood-pouch vasculature during embryonic development in two Syngnathus pipefishes

Journal of Fish Biology
J L RipleyC M Foran

Abstract

Vascular corrosion casts of Syngnathus floridae and Syngnathus fuscus brood pouches were examined by scanning electron microscopy. Morphological and quantitative data on the vasculature of the paternal brood pouch during each stage of embryonic development were investigated to explore potential changes during brooding, to consider interspecific differences and to provide structural evidence for previously reported functional roles of the brood pouch. The brood pouches of both species are highly vascularized structures with cup-like arrangements of brood-pouch vasculature developing around each embryo shortly after fertilization and breaking down before fry release. The density and size of paternally derived blood vessels in contact with the embryos were found to be consistent for S. fuscus once this structure was established early in development. On the contrary, these vasculature measurements varied with early S. floridae brood stages when the embryo still relied heavily on the yolk sac. Diameter measurements of S. fuscus brood-pouch blood vessels were also comparatively smaller during these early developmental stages, suggesting that the structural stability and opportunity for greater transport via slower blood flow may cont...Continue Reading

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Citations

Aug 21, 2015·Proceedings. Biological Sciences·Ines Braga GoncalvesCharlotta Kvarnemo
May 28, 2016·Ecology and Evolution·Ines Braga GoncalvesCharlotta Kvarnemo
Dec 1, 2017·Scientific Reports·Toshihiro KawasakiNoriyoshi Sakai
Feb 18, 2019·Biology of Reproduction·Pierre Comizzoli, William V Holt
May 7, 2020·Biological Reviews of the Cambridge Philosophical Society·Camilla M Whittington, Christopher R Friesen
Oct 9, 2019·Behavioral Ecology : Official Journal of the International Society for Behavioral Ecology·Malin NygårdInes Braga Goncalves
Jun 5, 2015·The Journal of Experimental Biology·Ines Braga GoncalvesCharlotta Kvarnemo

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