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Oviparous Hermaphroditic Fish with Internal Self-Fertilization
Science, 1961Adults of Rivulus marmoratus (Cyprinodontidae) contained eggs when dissected or laid eggs when kept alive. They invariably oviposited solo, emitting eggs in various developmental stages. Both juvenescent and senescent fish have functional ovotestes.
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Development of the pulmonary surfactant system in two oviparous vertebrates
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 2000In birds and oviparous reptiles, hatching is often a lengthy and exhausting process, which commences with pipping followed by lung clearance and pulmonary ventilation. We examined the composition of pulmonary surfactant in the developing lungs of the chicken, Gallus gallus, and of the bearded dragon, Pogona vitticeps.
Johnston, Sonya D. +3 more
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Oviparity in a Sea-Snake (Laticauda colubrina)
Nature, 1930IN view of the fact that all sea-snakes (Hydrophiidae) are generally regarded as viviparous,1 the following occurrence seems worthy of note.
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1.2.1.2 Embryonic development; oviparity and viviparity
1997Publisher Summary This chapter describes the embryonic development of soft scale insects family Coccidea. The mature oocyte in members of the family Coccidae is very similar to that noted in the Diaspididae. Even Krassilstschick cell that was considered to be typical of the pedicel of diaspidid ovarioles has also now been shown to be present in the ...
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The benefits of oviparity and the evolution of parental care
1999Abstract Why are there no viviparous birds? This question is critical to obtaining an understanding of parental care patterns and thus mating systems of birds. The benefits and costs of egg-laying have had effects on the reproductive biology of birds that cannot be overstated.
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