Results 61 to 70 of about 225 (136)
Fetal adaptations for viviparity in amphibians [PDF]
Journal of Morphology, 2014 ABSTRACTLive‐bearing has evolved in all three orders of amphibians—frogs, salamanders, and caecilians. Developing young may be either yolk dependent, or maternal nutrients may be supplied after yolk is resorbed, depending on the species. Among frogs, embryos in two distantly related lineages develop in the skin of the maternal parents' backs; they are ...
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Mitochondrial DNA. Part B. Resources, 2019 The viviparous Multiocellated Racerunner, Eremias multiocellata, is widespread in North China, Mongolia, and the Tuva Republic of Russia. A nearly complete mitochondrial genome of one individual from the suburb of Jingyuan County in Northwest China was ...
Xiuliang Su +3 more
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Revista de Biología Tropical, 1998 Fall reproduction is a common pattern in viviparous lizards from Mexican mountains. The reproductive pattern of Sceloporus palaciosi is seasonal but asynchronous between sexes.
Fausto R. Méndez, Maricela Villagrán
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Pathological Parthenogenesis in Viviparous Toothcarps [PDF]
Nature, 1958 IN viviparous toothcarps parthenogenesis has been described in Lebistes reticulatus 1,2 and Xiphophorus helleri 2, while in this species also some cases of development of ovarial teratomas, caused by pathological parthenogenesis, are known3. In addition to these cases we observed a new one, namely in Heterandria formosa.
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Revista Mexicana de Biodiversidad, 2012 Egg retention (ER) and intrauterine embryonic development (IED) have been considered intermediate steps in the evolution from oviparity to viviparity. Sceloporus aeneus is an oviparous lizard that is closely related to the viviparous species (Sceloporus ...
Rodolfo García-Collazo +4 more
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Journal of NematologyViviparity is a very rare reproductive mode in nematodes, having been documented in only six species. Five of these species have been isolated among the dung beetles Onthophagus, suggesting that studying the environments associated with dung beetles may ...
Ikeda Yuya +2 more
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eLifeEvolutionary transitions from egg laying (oviparity) to live birth (viviparity) are common across various taxa. Many species also exhibit genetic variation in egg-laying mode or display an intermediate mode with laid eggs containing embryos at various ...
Laure Mignerot +6 more
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How conflict shapes evolution in poeciliid fishes
Nature Communications, 2019 The viviparity driven conflict hypothesis predicts the evolution of the placenta will suppress the evolution of traits associated with pre-copulatory mate choice and accelerate speciation rate. Furness et al.
Andrew I. Furness +4 more
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, 1911 (Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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